dt-bindings: Add devicetree bindings

Add snapshot of device tree bindings from keystone common kernel, branch
"android-mainline-keystone-qcom-release" at c4c12103f9c0 ("Snap for 9228065
from e32903b9a63bb558df8b803b076619c53c16baad to
android-mainline-keystone-qcom-release").

Change-Id: I7682079615cbd9f29340a5c1f2a1d84ec441a1f1
Signed-off-by: Melody Olvera <quic_molvera@quicinc.com>

bindings/i2c/allwinner,sun6i-a31-p2wi.yaml

@@ -0,0 +1,63 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/allwinner,sun6i-a31-p2wi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner A31 P2WI (Push/Pull 2 Wires Interface)
+
+maintainers:
+  - Chen-Yu Tsai <wens@csie.org>
+  - Maxime Ripard <mripard@kernel.org>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    const: allwinner,sun6i-a31-p2wi
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  clock-frequency:
+    minimum: 1
+    maximum: 6000000
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - resets
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c@1f03400 {
+        compatible = "allwinner,sun6i-a31-p2wi";
+        reg = <0x01f03400 0x400>;
+        interrupts = <0 39 4>;
+        clocks = <&apb0_gates 3>;
+        clock-frequency = <100000>;
+        resets = <&apb0_rst 3>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        axp221: pmic@68 {
+            /* compatible = "x-powers,axp221"; */
+            reg = <0x68>;
+        };
+    };
+
+...

bindings/i2c/amlogic,meson6-i2c.yaml

@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2019 BayLibre, SAS
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/i2c/amlogic,meson6-i2c.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Amlogic Meson I2C Controller
+
+maintainers:
+  - Neil Armstrong <neil.armstrong@linaro.org>
+  - Beniamino Galvani <b.galvani@gmail.com>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    enum:
+      - amlogic,meson6-i2c # Meson6, Meson8 and compatible SoCs
+      - amlogic,meson-gxbb-i2c # GXBB and compatible SoCs
+      - amlogic,meson-axg-i2c # AXG and compatible SoCs
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c@c8100500 {
+        compatible = "amlogic,meson6-i2c";
+        reg = <0xc8100500 0x20>;
+        interrupts = <92>;
+        clocks = <&clk81>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        eeprom@52 {
+            compatible = "atmel,24c32";
+            reg = <0x52>;
+        };
+    };

bindings/i2c/apple,i2c.yaml

@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/i2c/apple,i2c.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Apple/PASemi I2C controller
+
+maintainers:
+  - Sven Peter <sven@svenpeter.dev>
+
+description: |
+  Apple SoCs such as the M1 come with a I2C controller based on the one found
+  in machines with P. A. Semi's PWRficient processors.
+  The bus is used to communicate with e.g. USB PD chips or the speaker
+  amp.
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - apple,t8103-i2c
+          - apple,t6000-i2c
+      - const: apple,i2c
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: I2C bus reference clock
+
+  interrupts:
+    maxItems: 1
+
+  clock-frequency:
+    description: |
+      Desired I2C bus clock frequency in Hz. If not specified, 100 kHz will be
+      used. This frequency is generated by dividing the reference clock.
+      Allowed values are between ref_clk/(16*4) and ref_clk/(16*255).
+
+  power-domains:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - interrupts
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c@35010000 {
+      compatible = "apple,t8103-i2c", "apple,i2c";
+      reg = <0x35010000 0x4000>;
+      interrupt-parent = <&aic>;
+      interrupts = <0 627 4>;
+      clocks = <&ref_clk>;
+      #address-cells = <1>;
+      #size-cells = <0>;
+    };

bindings/i2c/arm,i2c-versatile.yaml

@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/arm,i2c-versatile.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: I2C Controller on ARM Ltd development platforms
+
+maintainers:
+  - Linus Walleij <linus.walleij@linaro.org>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    const: arm,versatile-i2c
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+...
+

bindings/i2c/aspeed,i2c.yaml

@@ -0,0 +1,73 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/aspeed,i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ASPEED I2C on the AST24XX, AST25XX, and AST26XX SoCs
+
+maintainers:
+  - Rayn Chen <rayn_chen@aspeedtech.com>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    enum:
+      - aspeed,ast2400-i2c-bus
+      - aspeed,ast2500-i2c-bus
+      - aspeed,ast2600-i2c-bus
+
+  reg:
+    minItems: 1
+    items:
+      - description: address offset and range of bus
+      - description: address offset and range of bus buffer
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+    description:
+      root clock of bus, should reference the APB
+      clock in the second cell
+
+  resets:
+    maxItems: 1
+
+  bus-frequency:
+    minimum: 500
+    maximum: 4000000
+    default: 100000
+    description: frequency of the bus clock in Hz defaults to 100 kHz when not
+      specified
+
+  multi-master:
+    type: boolean
+    description:
+      states that there is another master active on this bus
+
+required:
+  - reg
+  - compatible
+  - clocks
+  - resets
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/aspeed-clock.h>
+    i2c0: i2c-bus@40 {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      compatible = "aspeed,ast2500-i2c-bus";
+      reg = <0x40 0x40>;
+      clocks = <&syscon ASPEED_CLK_APB>;
+      resets = <&syscon ASPEED_RESET_I2C>;
+      bus-frequency = <100000>;
+      interrupts = <0>;
+      interrupt-parent = <&i2c_ic>;
+    };

bindings/i2c/atmel,at91sam-i2c.yaml

@@ -0,0 +1,146 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2022 Microchip Technology, Inc. and its subsidiaries
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/atmel,at91sam-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: I2C for Atmel/Microchip platforms
+
+maintainers:
+  - Alexandre Belloni <alexandre.belloni@bootlin.com>
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - atmel,at91rm9200-i2c
+              - atmel,at91sam9261-i2c
+              - atmel,at91sam9260-i2c
+              - atmel,at91sam9g20-i2c
+              - atmel,at91sam9g10-i2c
+              - atmel,at91sam9x5-i2c
+              - atmel,sama5d4-i2c
+              - atmel,sama5d2-i2c
+              - microchip,sam9x60-i2c
+      - items:
+          - const: microchip,sama7g5-i2c
+          - const: microchip,sam9x60-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+  clocks:
+    maxItems: 1
+
+  clock-frequency:
+    default: 100000
+
+  dmas:
+    items:
+      - description: TX DMA Channel Specifier
+      - description: RX DMA Channel Specifier
+
+  dma-names:
+    items:
+      - const: tx
+      - const: rx
+
+  atmel,fifo-size:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      Maximum number of data the RX and TX FIFOs can store for
+      FIFO capable I2C controllers.
+
+  scl-gpios: true
+
+  sda-gpios: true
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - "#address-cells"
+  - "#size-cells"
+  - clocks
+
+allOf:
+  - $ref: "i2c-controller.yaml"
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - atmel,sama5d4-i2c
+              - atmel,sama5d2-i2c
+              - microchip,sam9x60-i2c
+              - microchip,sama7g5-i2c
+    then:
+      properties:
+        i2c-sda-hold-time-ns:
+          description:
+            TWD hold time
+          maxItems: 1
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/dma/at91.h>
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c0: i2c@fff84000 {
+        compatible = "atmel,at91sam9g20-i2c";
+        reg = <0xfff84000 0x100>;
+        interrupts = <12 IRQ_TYPE_LEVEL_HIGH 6>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        clocks = <&twi0_clk>;
+        clock-frequency = <400000>;
+
+        eeprom@50 {
+            compatible = "atmel,24c512";
+            reg = <0x50>;
+            pagesize = <128>;
+        };
+    };
+
+    i2c1: i2c@f8034600 {
+        compatible = "atmel,sama5d2-i2c";
+        reg = <0xf8034600 0x100>;
+        interrupts = <19 IRQ_TYPE_LEVEL_HIGH 7>;
+        dmas = <&dma0
+            (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1))
+            AT91_XDMAC_DT_PERID(11)>,
+               <&dma0
+            (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1))
+            AT91_XDMAC_DT_PERID(12)>;
+        dma-names = "tx", "rx";
+        #address-cells = <1>;
+        #size-cells = <0>;
+        clocks = <&flx0>;
+        atmel,fifo-size = <16>;
+        i2c-sda-hold-time-ns = <336>;
+        pinctrl-names = "default", "gpio";
+        pinctrl-0 = <&pinctrl_i2c0>;
+        pinctrl-1 = <&pinctrl_i2c0_gpio>;
+        sda-gpios = <&pioA 30 GPIO_ACTIVE_HIGH>;
+        scl-gpios = <&pioA 31 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+
+        eeprom@54 {
+            compatible = "atmel,24c02";
+            reg = <0x54>;
+            pagesize = <16>;
+        };
+    };

bindings/i2c/brcm,bcm2835-i2c.yaml

@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/brcm,bcm2835-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom BCM2835 I2C controller
+
+maintainers:
+  - Stephen Warren <swarren@wwwdotorg.org>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - brcm,bcm2835-i2c
+      - items:
+          - const: brcm,bcm2711-i2c
+          - const: brcm,bcm2835-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clock-names:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-frequency: true
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c@7e205000 {
+        compatible = "brcm,bcm2835-i2c";
+        reg = <0x7e205000 0x1000>;
+        interrupts = <2 21>;
+        clocks = <&clk_i2c>;
+        clock-frequency = <100000>;
+    };

bindings/i2c/brcm,brcmstb-i2c.yaml

@@ -0,0 +1,96 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/brcm,brcmstb-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom STB BSC IIC Master Controller
+
+maintainers:
+  - Kamal Dasu <kdasu.kdev@gmail.com>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    enum:
+      - brcm,bcm2711-hdmi-i2c
+      - brcm,brcmstb-i2c
+      - brcm,brcmper-i2c
+
+  reg:
+    minItems: 1
+    items:
+      - description: BSC register range
+      - description: Auto-I2C register range
+
+  reg-names:
+    items:
+      - const: bsc
+      - const: auto-i2c
+
+  interrupts:
+    maxItems: 1
+
+  interrupt-names:
+    maxItems: 1
+
+  clock-frequency:
+    enum:
+      - 46875
+      - 50000
+      - 93750
+      - 97500
+      - 187500
+      - 200000
+      - 375000
+      - 390000
+
+required:
+  - compatible
+  - reg
+  - clock-frequency
+
+unevaluatedProperties: false
+
+if:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - brcm,bcm2711-hdmi-i2c
+
+then:
+  properties:
+    reg:
+      minItems: 2
+
+  required:
+    - reg-names
+
+else:
+  properties:
+    reg:
+      maxItems: 1
+
+examples:
+  - |
+      bsca: i2c@f0406200 {
+          clock-frequency = <390000>;
+          compatible = "brcm,brcmstb-i2c";
+          interrupt-parent = <&irq0_intc>;
+          reg = <0xf0406200 0x58>;
+          interrupts = <0x18>;
+          interrupt-names = "upg_bsca";
+      };
+
+  - |
+      ddc0: i2c@7ef04500 {
+          compatible = "brcm,bcm2711-hdmi-i2c";
+          reg = <0x7ef04500 0x100>, <0x7ef00b00 0x300>;
+          reg-names = "bsc", "auto-i2c";
+          clock-frequency = <390000>;
+      };
+
+...

bindings/i2c/brcm,iproc-i2c.yaml

@@ -0,0 +1,71 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/brcm,iproc-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom iProc I2C controller
+
+maintainers:
+  - Rafał Miłecki <rafal@milecki.pl>
+
+properties:
+  compatible:
+    enum:
+      - brcm,iproc-i2c
+      - brcm,iproc-nic-i2c
+
+  reg:
+    maxItems: 1
+
+  clock-frequency:
+    enum: [ 100000, 400000 ]
+
+  interrupts:
+    description: |
+      Should contain the I2C interrupt. For certain revisions of the I2C
+      controller, I2C interrupt is unwired to the interrupt controller. In such
+      case, this property should be left unspecified, and driver will fall back
+      to polling mode
+    maxItems: 1
+
+  brcm,ape-hsls-addr-mask:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Host view of address mask into the 'APE' co-processor
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: brcm,iproc-nic-i2c
+    then:
+      required:
+        - brcm,ape-hsls-addr-mask
+
+unevaluatedProperties: false
+
+required:
+  - reg
+  - clock-frequency
+  - '#address-cells'
+  - '#size-cells'
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    i2c@18008000 {
+        compatible = "brcm,iproc-i2c";
+        reg = <0x18008000 0x100>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        interrupts = <GIC_SPI 85 IRQ_TYPE_NONE>;
+        clock-frequency = <100000>;
+
+        wm8750@1a {
+            compatible = "wlf,wm8750";
+            reg = <0x1a>;
+        };
+    };

bindings/i2c/brcm,kona-i2c.txt

@@ -0,0 +1,35 @@
+Broadcom Kona Family I2C
+=========================
+
+This I2C controller is used in the following Broadcom SoCs:
+
+  BCM11130
+  BCM11140
+  BCM11351
+  BCM28145
+  BCM28155
+
+Required Properties
+-------------------
+- compatible: "brcm,bcm11351-i2c", "brcm,kona-i2c"
+- reg: Physical base address and length of controller registers
+- interrupts: The interrupt number used by the controller
+- clocks: clock specifier for the kona i2c external clock
+- clock-frequency: The I2C bus frequency in Hz
+- #address-cells: Should be <1>
+- #size-cells: Should be <0>
+
+Refer to clocks/clock-bindings.txt for generic clock consumer
+properties.
+
+Example:
+
+i2c@3e016000 {
+	compatible = "brcm,bcm11351-i2c","brcm,kona-i2c";
+	reg = <0x3e016000 0x80>;
+	interrupts = <GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH>;
+	clocks = <&bsc1_clk>;
+	clock-frequency = <400000>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+};

bindings/i2c/cdns,i2c-r1p10.yaml

@@ -0,0 +1,60 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/i2c/cdns,i2c-r1p10.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Cadence I2C controller
+
+maintainers:
+  - Michal Simek <michal.simek@xilinx.com>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    enum:
+      - cdns,i2c-r1p10 # cadence i2c controller version 1.0
+      - cdns,i2c-r1p14 # cadence i2c controller version 1.4
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clock-frequency:
+    minimum: 1
+    maximum: 400000
+    description: |
+      Desired operating frequency, in Hz, of the bus.
+
+  clock-name:
+    const: pclk
+    description: |
+      Input clock name.
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - interrupts
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    i2c@e0004000 {
+        compatible = "cdns,i2c-r1p10";
+        clocks = <&clkc 38>;
+        interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
+        reg = <0xe0004000 0x1000>;
+        clock-frequency = <400000>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+    };

bindings/i2c/google,cros-ec-i2c-tunnel.yaml

@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+
+$id: http://devicetree.org/schemas/i2c/google,cros-ec-i2c-tunnel.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: I2C bus that tunnels through the ChromeOS EC (cros-ec)
+
+maintainers:
+  - Doug Anderson <dianders@chromium.org>
+  - Benson Leung <bleung@chromium.org>
+
+description: |
+  On some ChromeOS board designs we've got a connection to the EC
+  (embedded controller) but no direct connection to some devices on the
+  other side of the EC (like a battery and PMIC).  To get access to
+  those devices we need to tunnel our i2c commands through the EC.
+
+  The node for this device should be under a cros-ec node like
+  google,cros-ec-spi or google,cros-ec-i2c.
+
+allOf:
+  - $ref: i2c-controller.yaml#
+
+properties:
+  compatible:
+    const: google,cros-ec-i2c-tunnel
+
+  google,remote-bus:
+    description: The EC bus we'd like to talk to.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+required:
+  - compatible
+  - google,remote-bus
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    spi0 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        cros-ec@0 {
+            compatible = "google,cros-ec-spi";
+            reg = <0>;
+            spi-max-frequency = <5000000>;
+            interrupts = <99 0>;
+
+            i2c-tunnel {
+                compatible = "google,cros-ec-i2c-tunnel";
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                google,remote-bus = <0>;
+
+                battery: sbs-battery@b {
+                    compatible = "sbs,sbs-battery";
+                    reg = <0xb>;
+                    sbs,poll-retry-count = <1>;
+                };
+            };
+        };
+    };

bindings/i2c/i2c-altera.txt

@@ -0,0 +1,39 @@
+* Altera I2C Controller
+* This is Altera's synthesizable logic block I2C Controller for use
+* in Altera's FPGAs.
+
+Required properties :
+ - compatible : should be "altr,softip-i2c-v1.0"
+ - reg        : Offset and length of the register set for the device
+ - interrupts : <IRQ> where IRQ is the interrupt number.
+ - clocks     : phandle to input clock.
+ - #address-cells = <1>;
+ - #size-cells = <0>;
+
+Recommended properties :
+ - clock-frequency : desired I2C bus clock frequency in Hz.
+
+Optional properties :
+ - fifo-size : Size of the RX and TX FIFOs in bytes.
+ - Child nodes conforming to i2c bus binding
+
+Example :
+
+	i2c@100080000 {
+		compatible = "altr,softip-i2c-v1.0";
+		reg = <0x00000001 0x00080000 0x00000040>;
+		interrupt-parent = <&intc>;
+		interrupts = <0 43 4>;
+		clocks = <&clk_0>;
+		clock-frequency = <100000>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		fifo-size = <4>;
+
+		eeprom@51 {
+			compatible = "atmel,24c32";
+			reg = <0x51>;
+			pagesize = <32>;
+		};
+	};
+

bindings/i2c/i2c-arb-gpio-challenge.txt

@@ -0,0 +1,82 @@
+GPIO-based I2C Arbitration Using a Challenge & Response Mechanism
+=================================================================
+This uses GPIO lines and a challenge & response mechanism to arbitrate who is
+the master of an I2C bus in a multimaster situation.
+
+In many cases using GPIOs to arbitrate is not needed and a design can use
+the standard I2C multi-master rules.  Using GPIOs is generally useful in
+the case where there is a device on the bus that has errata and/or bugs
+that makes standard multimaster mode not feasible.
+
+Note that this scheme works well enough but has some downsides:
+* It is nonstandard (not using standard I2C multimaster)
+* Having two masters on a bus in general makes it relatively hard to debug
+  problems (hard to tell if i2c issues were caused by one master, another, or
+  some device on the bus).
+
+
+Algorithm:
+
+All masters on the bus have a 'bus claim' line which is an output that the
+others can see. These are all active low with pull-ups enabled.  We'll
+describe these lines as:
+
+- OUR_CLAIM: output from us signaling to other hosts that we want the bus
+- THEIR_CLAIMS: output from others signaling that they want the bus
+
+The basic algorithm is to assert your line when you want the bus, then make
+sure that the other side doesn't want it also.  A detailed explanation is best
+done with an example.
+
+Let's say we want to claim the bus.  We:
+1. Assert OUR_CLAIM.
+2. Waits a little bit for the other sides to notice (slew time, say 10
+   microseconds).
+3. Check THEIR_CLAIMS.  If none are asserted then the we have the bus and we are
+   done.
+4. Otherwise, wait for a few milliseconds and see if THEIR_CLAIMS are released.
+5. If not, back off, release the claim and wait for a few more milliseconds.
+6. Go back to 1 (until retry time has expired).
+
+
+Required properties:
+- compatible: i2c-arb-gpio-challenge
+- our-claim-gpio: The GPIO that we use to claim the bus.
+- their-claim-gpios: The GPIOs that the other sides use to claim the bus.
+  Note that some implementations may only support a single other master.
+- I2C arbitration bus node. See i2c-arb.txt in this directory.
+
+Optional properties:
+- slew-delay-us: microseconds to wait for a GPIO to go high. Default is 10 us.
+- wait-retry-us: we'll attempt another claim after this many microseconds.
+    Default is 3000 us.
+- wait-free-us: we'll give up after this many microseconds. Default is 50000 us.
+
+
+Example:
+	i2c@12ca0000 {
+		compatible = "acme,some-i2c-device";
+		#address-cells = <1>;
+		#size-cells = <0>;
+	};
+
+	i2c-arbitrator {
+		compatible = "i2c-arb-gpio-challenge";
+
+		i2c-parent = <&{/i2c@12CA0000}>;
+
+		our-claim-gpio = <&gpf0 3 1>;
+		their-claim-gpios = <&gpe0 4 1>;
+		slew-delay-us = <10>;
+		wait-retry-us = <3000>;
+		wait-free-us = <50000>;
+
+		i2c-arb {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			i2c@52 {
+				// Normal I2C device
+			};
+		};
+	};

bindings/i2c/i2c-arb.txt

@@ -0,0 +1,35 @@
+Common i2c arbitration bus properties.
+
+- i2c-arb child node
+
+Required properties for the i2c-arb child node:
+- #address-cells = <1>;
+- #size-cells = <0>;
+
+Optional properties for i2c-arb child node:
+- Child nodes conforming to i2c bus binding
+
+
+Example :
+
+	/*
+	   An NXP pca9541 I2C bus master selector at address 0x74
+	   with a NXP pca8574 GPIO expander attached.
+	 */
+
+	arb@74 {
+		compatible = "nxp,pca9541";
+		reg = <0x74>;
+
+		i2c-arb {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			gpio@38 {
+				compatible = "nxp,pca8574";
+				reg = <0x38>;
+				#gpio-cells = <2>;
+				gpio-controller;
+			};
+		};
+	};

bindings/i2c/i2c-axxia.txt

@@ -0,0 +1,30 @@
+LSI Axxia I2C
+
+Required properties :
+- compatible : Must be "lsi,api2c"
+- reg : Offset and length of the register set for the device
+- interrupts : the interrupt specifier
+- #address-cells : Must be <1>;
+- #size-cells : Must be <0>;
+- clock-names : Must contain "i2c".
+- clocks: Must contain an entry for each name in clock-names. See the common
+  clock bindings.
+
+Optional properties :
+- clock-frequency : Desired I2C bus clock frequency in Hz. If not specified,
+  the default 100 kHz frequency will be used. As only Normal and Fast modes
+  are supported, possible values are 100000 and 400000.
+
+Example :
+
+i2c@2010084000 {
+	compatible = "lsi,api2c";
+	device_type = "i2c";
+	#address-cells = <1>;
+	#size-cells = <0>;
+	reg = <0x20 0x10084000 0x00 0x1000>;
+	interrupts = <0 19 4>;
+	clocks = <&clk_per>;
+	clock-names = "i2c";
+	clock-frequency = <400000>;
+};

bindings/i2c/i2c-cbus-gpio.txt

@@ -0,0 +1,27 @@
+Device tree bindings for i2c-cbus-gpio driver
+
+Required properties:
+	- compatible = "i2c-cbus-gpio";
+	- gpios: clk, dat, sel
+	- #address-cells = <1>;
+	- #size-cells = <0>;
+
+Optional properties:
+	- child nodes conforming to i2c bus binding
+
+Example:
+
+i2c@0 {
+	compatible = "i2c-cbus-gpio";
+	gpios = <&gpio 66 0 /* clk */
+		 &gpio 65 0 /* dat */
+		 &gpio 64 0 /* sel */
+		>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	retu: retu@1 {
+		compatible = "nokia,retu";
+		reg = <0x1>;
+	};
+};

bindings/i2c/i2c-davinci.txt

@@ -0,0 +1,43 @@
+* Texas Instruments Davinci/Keystone I2C
+
+This file provides information, what the device node for the
+davinci/keystone i2c interface contains.
+
+Required properties:
+- compatible: "ti,davinci-i2c" or "ti,keystone-i2c";
+- reg : Offset and length of the register set for the device
+- clocks: I2C functional clock phandle.
+	  For 66AK2G this property should be set per binding,
+	  Documentation/devicetree/bindings/clock/ti,sci-clk.yaml
+
+SoC-specific Required Properties:
+
+The following are mandatory properties for Keystone 2 66AK2G SoCs only:
+
+- power-domains:	Should contain a phandle to a PM domain provider node
+			and an args specifier containing the I2C device id
+			value. This property is as per the binding,
+			Documentation/devicetree/bindings/soc/ti/sci-pm-domain.yaml
+
+Recommended properties :
+- interrupts : standard interrupt property.
+- clock-frequency : desired I2C bus clock frequency in Hz.
+- ti,has-pfunc: boolean; if defined, it indicates that SoC supports PFUNC
+	registers. PFUNC registers allow to switch I2C pins to function as
+	GPIOs, so they can be toggled manually.
+
+Example (enbw_cmc board):
+	i2c@1c22000 {
+		compatible = "ti,davinci-i2c";
+		reg = <0x22000 0x1000>;
+		clock-frequency = <100000>;
+		interrupts = <15>;
+		interrupt-parent = <&intc>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		dtt@48 {
+			compatible = "national,lm75";
+			reg = <0x48>;
+		};
+	};

bindings/i2c/i2c-demux-pinctrl.txt

@@ -0,0 +1,135 @@
+Pinctrl-based I2C Bus DeMux
+
+This binding describes an I2C bus demultiplexer that uses pin multiplexing to
+route the I2C signals, and represents the pin multiplexing configuration using
+the pinctrl device tree bindings. This may be used to select one I2C IP core at
+runtime which may have a better feature set for a given task than another I2C
+IP core on the SoC. The most simple example is to fall back to GPIO bitbanging
+if your current runtime configuration hits an errata of the internal IP core.
+
+    +-------------------------------+
+    | SoC                           |
+    |                               |   +-----+  +-----+
+    |   +------------+              |   | dev |  | dev |
+    |   |I2C IP Core1|--\           |   +-----+  +-----+
+    |   +------------+   \-------+  |      |        |
+    |                    |Pinctrl|--|------+--------+
+    |   +------------+   +-------+  |
+    |   |I2C IP Core2|--/           |
+    |   +------------+              |
+    |                               |
+    +-------------------------------+
+
+Required properties:
+- compatible: "i2c-demux-pinctrl"
+- i2c-parent: List of phandles of I2C masters available for selection. The first
+	      one will be used as default.
+- i2c-bus-name: The name of this bus. Also needed as pinctrl-name for the I2C
+		parents.
+
+Furthermore, I2C mux properties and child nodes. See i2c-mux.yaml in this
+directory.
+
+Example:
+
+Here is a snipplet for a bus to be demuxed. It contains various i2c clients for
+HDMI, so the bus is named "i2c-hdmi":
+
+	i2chdmi: i2c@8 {
+
+		compatible = "i2c-demux-pinctrl";
+		i2c-parent = <&gpioi2c>, <&iic2>, <&i2c2>;
+		i2c-bus-name = "i2c-hdmi";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		ak4643: sound-codec@12 {
+			compatible = "asahi-kasei,ak4643";
+
+			#sound-dai-cells = <0>;
+			reg = <0x12>;
+		};
+
+		composite-in@20 {
+			compatible = "adi,adv7180";
+			reg = <0x20>;
+			remote = <&vin1>;
+
+			port {
+				adv7180: endpoint {
+					bus-width = <8>;
+					remote-endpoint = <&vin1ep0>;
+				};
+			};
+		};
+
+		hdmi@39 {
+			compatible = "adi,adv7511w";
+			reg = <0x39>;
+			interrupt-parent = <&gpio1>;
+			interrupts = <15 IRQ_TYPE_LEVEL_LOW>;
+
+			adi,input-depth = <8>;
+			adi,input-colorspace = "rgb";
+			adi,input-clock = "1x";
+			adi,input-style = <1>;
+			adi,input-justification = "evenly";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+					adv7511_in: endpoint {
+						remote-endpoint = <&du_out_lvds0>;
+					};
+				};
+
+				port@1 {
+					reg = <1>;
+					adv7511_out: endpoint {
+						remote-endpoint = <&hdmi_con>;
+					};
+				};
+			};
+		};
+	};
+
+And for clarification, here are the snipplets for the i2c-parents:
+
+	gpioi2c: i2c@9 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "i2c-gpio";
+		gpios = <&gpio5 6 GPIO_ACTIVE_HIGH /* sda */
+			 &gpio5 5 GPIO_ACTIVE_HIGH /* scl */
+			>;
+		i2c-gpio,delay-us = <5>;
+	};
+
+...
+
+&i2c2	{
+	pinctrl-0 = <&i2c2_pins>;
+	pinctrl-names = "i2c-hdmi";
+
+	clock-frequency = <100000>;
+};
+
+...
+
+&iic2	{
+	pinctrl-0 = <&iic2_pins>;
+	pinctrl-names = "i2c-hdmi";
+
+	clock-frequency = <100000>;
+};
+
+Please note:
+
+- pinctrl properties for the parent I2C controllers need a pinctrl state
+  with the same name as i2c-bus-name, not "default"!
+
+- the i2c masters must have their status "disabled". This driver will
+  enable them at runtime when needed.

bindings/i2c/i2c-digicolor.txt

@@ -0,0 +1,25 @@
+Conexant Digicolor I2C controller
+
+Required properties:
+ - compatible: must be "cnxt,cx92755-i2c"
+ - reg: physical address and length of the device registers
+ - interrupts: a single interrupt specifier
+ - clocks: clock for the device
+ - #address-cells: should be <1>
+ - #size-cells: should be <0>
+
+Optional properties:
+- clock-frequency: the desired I2C bus clock frequency in Hz; in
+  absence of this property the default value is used (100 kHz).
+
+Example:
+
+	i2c: i2c@f0000120 {
+		compatible = "cnxt,cx92755-i2c";
+		reg = <0xf0000120 0x10>;
+		interrupts = <28>;
+		clocks = <&main_clk>;
+		clock-frequency = <100000>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+	};

bindings/i2c/i2c-exynos5.yaml

@@ -0,0 +1,133 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-exynos5.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung's High Speed I2C controller
+
+maintainers:
+  - Krzysztof Kozlowski <krzk@kernel.org>
+
+description: |
+  The Samsung's High Speed I2C controller is used to interface with I2C devices
+  at various speeds ranging from 100kHz to 3.4MHz.
+
+  In case the HSI2C controller is encapsulated within USI block (it's the case
+  e.g. for Exynos850 and Exynos Auto V9 SoCs), it might be also necessary to
+  define USI node in device tree file, choosing "i2c" configuration. Please see
+  Documentation/devicetree/bindings/soc/samsung/exynos-usi.yaml for details.
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - samsung,exynos5250-hsi2c    # Exynos5250 and Exynos5420
+          - samsung,exynos5260-hsi2c    # Exynos5260
+          - samsung,exynos7-hsi2c       # Exynos7
+          - samsung,exynosautov9-hsi2c  # ExynosAutoV9 and Exynos850
+      - const: samsung,exynos5-hsi2c    # Exynos5250 and Exynos5420
+        deprecated: true
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clock-frequency:
+    default: 100000
+    description:
+      Desired operating frequency in Hz of the bus.
+
+      If not specified, the bus operates in fast-speed mode at 100kHz.
+
+      If specified, the bus operates in high-speed mode only if the
+      clock-frequency is >= 1MHz.
+
+  clocks:
+    minItems: 1
+    items:
+      - description: I2C operating clock
+      - description: Bus clock (APB)
+
+  clock-names:
+    minItems: 1
+    items:
+      - const: hsi2c
+      - const: hsi2c_pclk
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - samsung,exynosautov9-hsi2c
+
+    then:
+      properties:
+        clocks:
+          minItems: 2
+
+        clock-names:
+          minItems: 2
+
+      required:
+        - clock-names
+
+    else:
+      properties:
+        clocks:
+          maxItems: 1
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/exynos5420.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    hsi2c_8: i2c@12e00000 {
+        compatible = "samsung,exynos5250-hsi2c";
+        reg = <0x12e00000 0x1000>;
+        interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        clock-frequency = <100000>;
+        clocks = <&clock CLK_USI4>;
+        clock-names = "hsi2c";
+
+        pmic@66 {
+            /* compatible = "samsung,s2mps11-pmic"; */
+            reg = <0x66>;
+        };
+    };
+
+  - |
+    #include <dt-bindings/clock/exynos850.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    hsi2c_2: i2c@138c0000 {
+        compatible = "samsung,exynosautov9-hsi2c";
+        reg = <0x138c0000 0xc0>;
+        interrupts = <GIC_SPI 195 IRQ_TYPE_LEVEL_HIGH>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        clocks = <&cmu_peri CLK_GOUT_HSI2C2_IPCLK>,
+                 <&cmu_peri CLK_GOUT_HSI2C2_PCLK>;
+        clock-names = "hsi2c", "hsi2c_pclk";
+
+        pmic@66 {
+            /* compatible = "samsung,s2mps11-pmic"; */
+            reg = <0x66>;
+        };
+    };

bindings/i2c/i2c-fsi.txt

@@ -0,0 +1,40 @@
+Device-tree bindings for FSI-attached I2C master and busses
+-----------------------------------------------------------
+
+Required properties:
+ - compatible = "ibm,i2c-fsi";
+ - reg = < address size >;		: The FSI CFAM address and address
+					  space size.
+ - #address-cells = <1>;		: Number of address cells in child
+					  nodes.
+ - #size-cells = <0>;			: Number of size cells in child nodes.
+ - child nodes				: Nodes to describe busses off the I2C
+					  master.
+
+Child node required properties:
+ - reg = < port number >		: The port number on the I2C master.
+
+Child node optional properties:
+ - child nodes				: Nodes to describe devices on the I2C
+					  bus.
+
+Examples:
+
+    i2c@1800 {
+        compatible = "ibm,i2c-fsi";
+        reg = < 0x1800 0x400 >;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        i2c-bus@0 {
+            reg = <0>;
+        };
+
+        i2c-bus@1 {
+            reg = <1>;
+
+            eeprom@50 {
+                compatible = "vendor,dev-name";
+            };
+        };
+    };

bindings/i2c/i2c-gate.yaml

@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-gate.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Common i2c gate properties
+
+maintainers:
+  - Peter Rosin <peda@axentia.se>
+
+description: |
+  An i2c gate is useful to e.g. reduce the digital noise for RF tuners connected
+  to the i2c bus. Gates are similar to arbitrators in that you need to perform
+  some kind of operation to access the i2c bus past the arbitrator/gate, but
+  there are no competing masters to consider for gates and therefore there is
+  no arbitration happening for gates.
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml
+
+properties:
+  $nodename:
+    const: i2c-gate
+
+additionalProperties: true
+
+examples:
+  - |
+    i2c-gate {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        ak8975@c {
+            compatible = "asahi-kasei,ak8975";
+            reg = <0x0c>;
+        };
+    };
+...

bindings/i2c/i2c-gpio.yaml

@@ -0,0 +1,73 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-gpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Bindings for GPIO bitbanged I2C
+
+maintainers:
+  - Wolfram Sang <wsa@kernel.org>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    items:
+      - const: i2c-gpio
+
+  sda-gpios:
+    description:
+      gpio used for the sda signal, this should be flagged as
+      active high using open drain with (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)
+      from <dt-bindings/gpio/gpio.h> since the signal is by definition
+      open drain.
+    maxItems: 1
+
+  scl-gpios:
+    description:
+      gpio used for the scl signal, this should be flagged as
+      active high using open drain with (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)
+      from <dt-bindings/gpio/gpio.h> since the signal is by definition
+      open drain.
+    maxItems: 1
+
+  i2c-gpio,scl-output-only:
+    description: scl as output only
+    type: boolean
+
+  i2c-gpio,delay-us:
+    description: delay between GPIO operations (may depend on each platform)
+
+  i2c-gpio,timeout-ms:
+    description: timeout to get data
+
+  # Deprecated properties, do not use in new device tree sources:
+  gpios:
+    minItems: 2
+    maxItems: 2
+    description: sda and scl gpio, alternative for {sda,scl}-gpios
+
+  i2c-gpio,sda-open-drain:
+    type: boolean
+    deprecated: true
+    description: this means that something outside of our control has put
+      the GPIO line used for SDA into open drain mode, and that something is
+      not the GPIO chip. It is essentially an inconsistency flag.
+
+  i2c-gpio,scl-open-drain:
+    type: boolean
+    deprecated: true
+    description: this means that something outside of our control has put the
+      GPIO line used for SCL into open drain mode, and that something is not
+      the GPIO chip. It is essentially an inconsistency flag.
+
+required:
+  - compatible
+  - sda-gpios
+  - scl-gpios
+
+unevaluatedProperties: false
+
+...

bindings/i2c/i2c-hix5hd2.txt

@@ -0,0 +1,24 @@
+I2C for Hisilicon hix5hd2 chipset platform
+
+Required properties:
+- compatible: Must be "hisilicon,hix5hd2-i2c"
+- reg: physical base address of the controller and length of memory mapped
+     region.
+- interrupts: interrupt number to the cpu.
+- #address-cells = <1>;
+- #size-cells = <0>;
+- clocks: phandles to input clocks.
+
+Optional properties:
+- clock-frequency: Desired I2C bus frequency in Hz, otherwise defaults to 100000
+- Child nodes conforming to i2c bus binding
+
+Examples:
+I2C0@f8b10000 {
+	compatible = "hisilicon,hix5hd2-i2c";
+	reg = <0xf8b10000 0x1000>;
+	interrupts = <0 38 4>;
+	clocks = <&clock HIX5HD2_I2C0_RST>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+}

bindings/i2c/i2c-img-scb.txt

@@ -0,0 +1,26 @@
+IMG Serial Control Bus (SCB) I2C Controller
+
+Required Properties:
+- compatible: "img,scb-i2c"
+- reg: Physical base address and length of controller registers
+- interrupts: Interrupt number used by the controller
+- clocks : Should contain a clock specifier for each entry in clock-names
+- clock-names : Should contain the following entries:
+                "scb", for the SCB core clock.
+                "sys", for the system clock.
+- clock-frequency: The I2C bus frequency in Hz
+- #address-cells: Should be <1>
+- #size-cells: Should be <0>
+
+Example:
+
+i2c@18100000 {
+	compatible = "img,scb-i2c";
+	reg = <0x18100000 0x200>;
+	interrupts = <GIC_SHARED 2 IRQ_TYPE_LEVEL_HIGH>;
+	clocks = <&i2c0_clk>, <&system_clk>;
+	clock-names = "scb", "sys";
+	clock-frequency = <400000>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+};

bindings/i2c/i2c-imx-lpi2c.yaml

@@ -0,0 +1,81 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-imx-lpi2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale Low Power Inter IC (LPI2C) for i.MX
+
+maintainers:
+  - Anson Huang <Anson.Huang@nxp.com>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - fsl,imx7ulp-lpi2c
+      - items:
+          - enum:
+              - fsl,imx8qxp-lpi2c
+              - fsl,imx8dxl-lpi2c
+              - fsl,imx8qm-lpi2c
+              - fsl,imx8ulp-lpi2c
+              - fsl,imx93-lpi2c
+          - const: fsl,imx7ulp-lpi2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  assigned-clock-parents: true
+  assigned-clock-rates: true
+  assigned-clocks: true
+  clock-frequency: true
+
+  clock-names:
+    items:
+      - const: per
+      - const: ipg
+
+  clocks:
+    maxItems: 2
+
+  dmas:
+    items:
+      - description: DMA controller phandle and request line for TX
+      - description: DMA controller phandle and request line for RX
+
+  dma-names:
+    items:
+      - const: tx
+      - const: rx
+
+  power-domains:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx7ulp-clock.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    i2c@40a50000 {
+        compatible = "fsl,imx7ulp-lpi2c";
+        reg = <0x40A50000 0x10000>;
+        interrupt-parent = <&intc>;
+        interrupts = <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&clks IMX7ULP_CLK_LPI2C7>,
+                 <&clks IMX7ULP_CLK_NIC1_BUS_DIV>;
+    };

bindings/i2c/i2c-imx.yaml

@@ -0,0 +1,123 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-imx.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale Inter IC (I2C) and High Speed Inter IC (HS-I2C) for i.MX
+
+maintainers:
+  - Oleksij Rempel <o.rempel@pengutronix.de>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - const: fsl,imx1-i2c
+      - const: fsl,imx21-i2c
+      - const: fsl,vf610-i2c
+      - items:
+          - enum:
+              - fsl,ls1012a-i2c
+              - fsl,ls1021a-i2c
+              - fsl,ls1028a-i2c
+              - fsl,ls1043a-i2c
+              - fsl,ls1046a-i2c
+              - fsl,ls1088a-i2c
+              - fsl,ls208xa-i2c
+              - fsl,lx2160a-i2c
+          - const: fsl,vf610-i2c
+      - items:
+          - const: fsl,imx35-i2c
+          - const: fsl,imx1-i2c
+      - items:
+          - const: fsl,imx7d-i2c
+          - const: fsl,imx21-i2c
+      - items:
+          - enum:
+              - fsl,imx25-i2c
+              - fsl,imx27-i2c
+              - fsl,imx31-i2c
+              - fsl,imx50-i2c
+              - fsl,imx51-i2c
+              - fsl,imx53-i2c
+              - fsl,imx6q-i2c
+              - fsl,imx6sl-i2c
+              - fsl,imx6sx-i2c
+              - fsl,imx6sll-i2c
+              - fsl,imx6ul-i2c
+              - fsl,imx7s-i2c
+              - fsl,imx8mq-i2c
+              - fsl,imx8mm-i2c
+              - fsl,imx8mn-i2c
+              - fsl,imx8mp-i2c
+          - const: fsl,imx21-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: ipg
+
+  clock-frequency:
+    minimum: 1
+    default: 100000
+    maximum: 400000
+
+  dmas:
+    items:
+      - description: DMA controller phandle and request line for RX
+      - description: DMA controller phandle and request line for TX
+
+  dma-names:
+    items:
+      - const: rx
+      - const: tx
+
+  sda-gpios:
+    maxItems: 1
+
+  scl-gpios:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx5-clock.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c@83fc4000 {
+        compatible = "fsl,imx51-i2c", "fsl,imx21-i2c";
+        reg = <0x83fc4000 0x4000>;
+        interrupts = <63>;
+        clocks = <&clks IMX5_CLK_I2C2_GATE>;
+    };
+
+  - |
+    #include <dt-bindings/clock/vf610-clock.h>
+
+    i2c@40066000 {
+        compatible = "fsl,vf610-i2c";
+        reg = <0x40066000 0x1000>;
+        interrupts = <71 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&clks VF610_CLK_I2C0>;
+        clock-names = "ipg";
+        dmas = <&edma0 0 50>,
+               <&edma0 0 51>;
+        dma-names = "rx", "tx";
+    };

bindings/i2c/i2c-iop3xx.txt

@@ -0,0 +1,20 @@
+i2c Controller on XScale platforms such as IOP3xx and IXP4xx
+
+Required properties:
+- compatible : Must be one of
+  "intel,iop3xx-i2c"
+  "intel,ixp4xx-i2c";
+- reg
+- #address-cells = <1>;
+- #size-cells = <0>;
+
+Optional properties:
+- Child nodes conforming to i2c bus binding
+
+Example:
+
+i2c@c8011000 {
+	compatible = "intel,ixp4xx-i2c";
+	reg = <0xc8011000 0x18>;
+	interrupts = <33 IRQ_TYPE_LEVEL_LOW>;
+};

bindings/i2c/i2c-lpc2k.txt

@@ -0,0 +1,33 @@
+NXP I2C controller for LPC2xxx/178x/18xx/43xx
+
+Required properties:
+ - compatible: must be "nxp,lpc1788-i2c"
+ - reg: physical address and length of the device registers
+ - interrupts: a single interrupt specifier
+ - clocks: clock for the device
+ - #address-cells: should be <1>
+ - #size-cells: should be <0>
+
+Optional properties:
+- clock-frequency: the desired I2C bus clock frequency in Hz; in
+  absence of this property the default value is used (100 kHz).
+
+Example:
+i2c0: i2c@400a1000 {
+	compatible = "nxp,lpc1788-i2c";
+	reg = <0x400a1000 0x1000>;
+	interrupts = <18>;
+	clocks = <&ccu1 CLK_APB1_I2C0>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+};
+
+&i2c0 {
+	clock-frequency = <400000>;
+
+	lm75@48 {
+		compatible = "nxp,lm75";
+		reg = <0x48>;
+	};
+};
+

bindings/i2c/i2c-mpc.yaml

@@ -0,0 +1,100 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-mpc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: I2C-Bus adapter for MPC824x/83xx/85xx/86xx/512x/52xx SoCs
+
+maintainers:
+  - Chris Packham <chris.packham@alliedtelesis.co.nz>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - mpc5200-i2c
+              - fsl,mpc5200-i2c
+              - fsl,mpc5121-i2c
+              - fsl,mpc8313-i2c
+              - fsl,mpc8543-i2c
+              - fsl,mpc8544-i2c
+          - const: fsl-i2c
+      - items:
+          - const: fsl,mpc5200b-i2c
+          - const: fsl,mpc5200-i2c
+          - const: fsl-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  fsl,preserve-clocking:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: |
+      if defined, the clock settings from the bootloader are
+      preserved (not touched)
+
+  fsl,timeout:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      I2C bus timeout in microseconds
+
+  fsl,i2c-erratum-a004447:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: |
+      Indicates the presence of QorIQ erratum A-004447, which
+      says that the standard i2c recovery scheme mechanism does
+      not work and an alternate implementation is needed.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    /* MPC5121 based board */
+    i2c@1740 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        compatible = "fsl,mpc5121-i2c", "fsl-i2c";
+        reg = <0x1740 0x20>;
+        interrupts = <11 0x8>;
+        interrupt-parent = <&ipic>;
+        clock-frequency = <100000>;
+    };
+
+  - |
+    /* MPC5200B based board */
+    i2c@3d00 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        compatible = "fsl,mpc5200b-i2c", "fsl,mpc5200-i2c", "fsl-i2c";
+        reg = <0x3d00 0x40>;
+        interrupts = <2 15 0>;
+        interrupt-parent = <&mpc5200_pic>;
+        fsl,preserve-clocking;
+    };
+
+  - |
+    /* MPC8544 base board */
+    i2c@3100 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        compatible = "fsl,mpc8544-i2c", "fsl-i2c";
+        reg = <0x3100 0x100>;
+        interrupts = <43 2>;
+        interrupt-parent = <&mpic>;
+        clock-frequency = <400000>;
+        fsl,timeout = <10000>;
+    };
+...

bindings/i2c/i2c-mt65xx.yaml

@@ -0,0 +1,119 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-mt65xx.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek I2C controller
+
+description:
+  This driver interfaces with the native I2C controller present in
+  various MediaTek SoCs.
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+maintainers:
+  - Qii Wang <qii.wang@mediatek.com>
+
+properties:
+  compatible:
+    oneOf:
+      - const: mediatek,mt2712-i2c
+      - const: mediatek,mt6577-i2c
+      - const: mediatek,mt6589-i2c
+      - const: mediatek,mt7622-i2c
+      - const: mediatek,mt8168-i2c
+      - const: mediatek,mt8173-i2c
+      - const: mediatek,mt8183-i2c
+      - const: mediatek,mt8186-i2c
+      - const: mediatek,mt8188-i2c
+      - const: mediatek,mt8192-i2c
+      - items:
+          - enum:
+              - mediatek,mt7629-i2c
+              - mediatek,mt8516-i2c
+          - const: mediatek,mt2712-i2c
+      - items:
+          - enum:
+              - mediatek,mt2701-i2c
+              - mediatek,mt6797-i2c
+              - mediatek,mt7623-i2c
+          - const: mediatek,mt6577-i2c
+      - items:
+          - enum:
+              - mediatek,mt8195-i2c
+          - const: mediatek,mt8192-i2c
+
+  reg:
+    items:
+      - description: Physical base address
+      - description: DMA base address
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    minItems: 2
+    items:
+      - description: Main clock for I2C bus
+      - description: Clock for I2C via DMA
+      - description: Bus arbitrator clock
+      - description: Clock for I2C from PMIC
+
+  clock-names:
+    minItems: 2
+    items:
+      - const: main
+      - const: dma
+      - const: arb
+      - const: pmic
+
+  clock-div:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Frequency divider of clock source in I2C module
+
+  clock-frequency:
+    default: 100000
+    description:
+      SCL frequency to use (in Hz). If omitted, 100kHz is used.
+
+  mediatek,have-pmic:
+    description: Platform controls I2C from PMIC side
+    type: boolean
+
+  mediatek,use-push-pull:
+    description: Use push-pull mode I/O config
+    type: boolean
+
+  vbus-supply:
+    description: Phandle to the regulator providing power to SCL/SDA
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - clock-div
+  - interrupts
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c0: i2c@1100d000 {
+      compatible = "mediatek,mt6577-i2c";
+      reg = <0x1100d000 0x70>, <0x11000300 0x80>;
+      interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_LOW>;
+      clocks = <&i2c0_ck>, <&ap_dma_ck>;
+      clock-names = "main", "dma";
+      clock-div = <16>;
+      clock-frequency = <400000>;
+      mediatek,have-pmic;
+
+      #address-cells = <1>;
+      #size-cells = <0>;
+    };

bindings/i2c/i2c-mux-gpio.yaml

@@ -0,0 +1,104 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-mux-gpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: GPIO-based I2C Bus Mux
+
+maintainers:
+  - Wolfram Sang <wsa@kernel.org>
+
+description: |
+  This binding describes an I2C bus multiplexer that uses GPIOs to route the I2C signals.
+
+                                  +-----+  +-----+
+                                  | dev |  | dev |
+    +------------+                +-----+  +-----+
+    | SoC        |                   |        |
+    |            |          /--------+--------+
+    |   +------+ |  +------+    child bus A, on GPIO value set to 0
+    |   | I2C  |-|--| Mux  |
+    |   +------+ |  +--+---+    child bus B, on GPIO value set to 1
+    |            |     |    \----------+--------+--------+
+    |   +------+ |     |               |        |        |
+    |   | GPIO |-|-----+            +-----+  +-----+  +-----+
+    |   +------+ |                  | dev |  | dev |  | dev |
+    +------------+                  +-----+  +-----+  +-----+
+
+  For each I2C child node, an I2C child bus will be created. They will be numbered based on their
+  order in the device tree.
+
+  Whenever an access is made to a device on a child bus, the value set in the relevant node's reg
+  property will be output using the list of GPIOs, the first in the list holding the least-
+  significant value.
+
+  If an idle state is defined, using the idle-state (optional) property, whenever an access is not
+  being made to a device on a child bus, the GPIOs will be set according to the idle value.
+
+  If an idle state is not defined, the most recently used value will be left programmed into
+  hardware whenever no access is being made to a device on a child bus.
+
+properties:
+  compatible:
+    const: i2c-mux-gpio
+
+  i2c-parent:
+    description: phandle of the I2C bus that this multiplexer's master-side port is connected to
+    $ref: "/schemas/types.yaml#/definitions/phandle"
+
+  mux-gpios:
+    description: list of GPIOs used to control the muxer
+    minItems: 1
+    maxItems: 4  # Should be enough
+
+  idle-state:
+    description: Value to set the muxer to when idle. When no value is given, it defaults to the
+      last value used.
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+
+allOf:
+  - $ref: i2c-mux.yaml
+
+unevaluatedProperties: false
+
+required:
+  - compatible
+  - i2c-parent
+  - mux-gpios
+
+examples:
+  - |
+    i2cmux {
+      compatible = "i2c-mux-gpio";
+      #address-cells = <1>;
+      #size-cells = <0>;
+      mux-gpios = <&gpio1 22 0>, <&gpio1 23 0>;
+      i2c-parent = <&i2c1>;
+
+      i2c@1 {
+        reg = <1>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        ssd1307: oled@3c {
+          compatible = "solomon,ssd1307fb-i2c";
+          reg = <0x3c>;
+          pwms = <&pwm 4 3000>;
+          reset-gpios = <&gpio2 7 1>;
+        };
+      };
+
+      i2c@3 {
+        reg = <3>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        pca9555: pca9555@20 {
+          compatible = "nxp,pca9555";
+          gpio-controller;
+          #gpio-cells = <2>;
+          reg = <0x20>;
+        };
+      };
+    };

bindings/i2c/i2c-mux-gpmux.yaml

@@ -0,0 +1,123 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-mux-gpmux.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: General Purpose I2C Bus Mux
+
+maintainers:
+  - Peter Rosin <peda@axentia.se>
+
+description: |+
+  This binding describes an I2C bus multiplexer that uses a mux controller
+  from the mux subsystem to route the I2C signals.
+
+                                    .-----.  .-----.
+                                    | dev |  | dev |
+      .------------.                '-----'  '-----'
+      | SoC        |                   |        |
+      |            |          .--------+--------'
+      |   .------. |  .------+    child bus A, on MUX value set to 0
+      |   | I2C  |-|--| Mux  |
+      |   '------' |  '--+---+    child bus B, on MUX value set to 1
+      |   .------. |     |    '----------+--------+--------.
+      |   | MUX- | |     |               |        |        |
+      |   | Ctrl |-|-----+            .-----.  .-----.  .-----.
+      |   '------' |                  | dev |  | dev |  | dev |
+      '------------'                  '-----'  '-----'  '-----'
+
+
+allOf:
+  - $ref: /schemas/i2c/i2c-mux.yaml#
+
+properties:
+  compatible:
+    const: i2c-mux
+
+  i2c-parent:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      The phandle of the I2C bus that this multiplexer's master-side port is
+      connected to.
+
+  mux-controls:
+    maxItems: 1
+    description:
+      The mux-controller states are the I2C sub-bus numbers.
+
+  mux-locked:
+    type: boolean
+    description: |
+      Explicitly allow unrelated I2C transactions on the parent I2C adapter at
+      these times:
+       - during setup of the multiplexer
+       - between setup of the multiplexer and the child bus I2C transaction
+       - between the child bus I2C transaction and releasing of the multiplexer
+       - during releasing of the multiplexer
+
+      However, I2C transactions to devices behind all I2C multiplexers connected
+      to the same parent adapter that this multiplexer is connected to are blocked
+      for the full duration of the complete multiplexed I2C transaction (i.e.
+      including the times covered by the above list).
+      If mux-locked is not present, the multiplexer is assumed to be parent-locked.
+      This means that no unrelated I2C transactions are allowed on the parent I2C
+      adapter for the complete multiplexed I2C transaction.
+      The properties of mux-locked and parent-locked multiplexers are discussed
+      in more detail in Documentation/i2c/i2c-topology.rst.
+
+required:
+  - compatible
+  - i2c-parent
+  - mux-controls
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    mux: mux-controller {
+        compatible = "gpio-mux";
+        #mux-control-cells = <0>;
+
+        mux-gpios = <&pioA 0 GPIO_ACTIVE_HIGH>,
+                    <&pioA 1 GPIO_ACTIVE_HIGH>;
+    };
+
+    i2c-mux {
+        compatible = "i2c-mux";
+        mux-locked;
+        i2c-parent = <&i2c1>;
+
+        mux-controls = <&mux>;
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        i2c@1 {
+            reg = <1>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            gpio@20 {
+                compatible = "nxp,pca9555";
+                gpio-controller;
+                #gpio-cells = <2>;
+                reg = <0x20>;
+            };
+        };
+
+        i2c@3 {
+            reg = <3>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            gpio@20 {
+                compatible = "nxp,pca9555";
+                gpio-controller;
+                #gpio-cells = <2>;
+                reg = <0x20>;
+            };
+        };
+    };
+...

bindings/i2c/i2c-mux-ltc4306.txt

@@ -0,0 +1,61 @@
+* Linear Technology / Analog Devices I2C bus switch
+
+Required Properties:
+
+  - compatible: Must contain one of the following.
+    "lltc,ltc4305", "lltc,ltc4306"
+  - reg: The I2C address of the device.
+
+  The following required properties are defined externally:
+
+  - Standard I2C mux properties. See i2c-mux.yaml in this directory.
+  - I2C child bus nodes. See i2c-mux.yaml in this directory.
+
+Optional Properties:
+
+  - enable-gpios: Reference to the GPIO connected to the enable input.
+  - i2c-mux-idle-disconnect: Boolean; if defined, forces mux to disconnect all
+    children in idle state. This is necessary for example, if there are several
+    multiplexers on the bus and the devices behind them use same I2C addresses.
+  - gpio-controller: Marks the device node as a GPIO Controller.
+  - #gpio-cells: Should be two.  The first cell is the pin number and
+	the second cell is used to specify flags.
+	See ../gpio/gpio.txt for more information.
+  - ltc,downstream-accelerators-enable: Enables the rise time accelerators
+	on the downstream port.
+  - ltc,upstream-accelerators-enable: Enables the rise time accelerators
+	on the upstream port.
+
+Example:
+
+	ltc4306: i2c-mux@4a {
+		compatible = "lltc,ltc4306";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		reg = <0x4a>;
+
+		gpio-controller;
+		#gpio-cells = <2>;
+
+		i2c@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0>;
+
+			eeprom@50 {
+				compatible = "atmel,24c02";
+				reg = <0x50>;
+			};
+		};
+
+		i2c@1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <1>;
+
+			eeprom@50 {
+				compatible = "atmel,24c02";
+				reg = <0x50>;
+			};
+		};
+	};

bindings/i2c/i2c-mux-pca954x.yaml

@@ -0,0 +1,110 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-mux-pca954x.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP PCA954x I2C bus switch
+
+maintainers:
+  - Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+
+description:
+  The binding supports NXP PCA954x and PCA984x I2C mux/switch devices.
+
+allOf:
+  - $ref: /schemas/i2c/i2c-mux.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - nxp,pca9540
+          - nxp,pca9542
+          - nxp,pca9543
+          - nxp,pca9544
+          - nxp,pca9545
+          - nxp,pca9546
+          - nxp,pca9547
+          - nxp,pca9548
+          - nxp,pca9846
+          - nxp,pca9847
+          - nxp,pca9848
+          - nxp,pca9849
+      - items:
+          - const: nxp,pca9646
+          - const: nxp,pca9546
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  "#interrupt-cells":
+    const: 2
+
+  interrupt-controller: true
+
+  reset-gpios:
+    maxItems: 1
+
+  i2c-mux-idle-disconnect:
+    type: boolean
+    description: Forces mux to disconnect all children in idle state. This is
+      necessary for example, if there are several multiplexers on the bus and
+      the devices behind them use same I2C addresses.
+
+  idle-state:
+    description: if present, overrides i2c-mux-idle-disconnect
+    $ref: /schemas/mux/mux-controller.yaml#/properties/idle-state
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        i2c-mux@74 {
+            compatible = "nxp,pca9548";
+            #address-cells = <1>;
+            #size-cells = <0>;
+            reg = <0x74>;
+
+            interrupt-parent = <&ipic>;
+            interrupts = <17 IRQ_TYPE_LEVEL_LOW>;
+            interrupt-controller;
+            #interrupt-cells = <2>;
+
+            i2c@2 {
+                #address-cells = <1>;
+                #size-cells = <0>;
+                reg = <2>;
+
+                eeprom@54 {
+                    compatible = "atmel,24c08";
+                    reg = <0x54>;
+                };
+            };
+
+            i2c@4 {
+                #address-cells = <1>;
+                #size-cells = <0>;
+                reg = <4>;
+
+                rtc@51 {
+                    compatible = "nxp,pcf8563";
+                    reg = <0x51>;
+                };
+            };
+        };
+    };
+...

bindings/i2c/i2c-mux-pinctrl.yaml

@@ -0,0 +1,103 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-mux-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Pinctrl-based I2C Bus Mux
+
+maintainers:
+  - Wolfram Sang <wsa@kernel.org>
+
+description: |
+  This binding describes an I2C bus multiplexer that uses pin multiplexing to route the I2C
+  signals, and represents the pin multiplexing configuration using the pinctrl device tree
+  bindings.
+
+                                 +-----+  +-----+
+                                 | dev |  | dev |
+    +------------------------+   +-----+  +-----+
+    | SoC                    |      |        |
+    |                   /----|------+--------+
+    |   +---+   +------+     | child bus A, on first set of pins
+    |   |I2C|---|Pinmux|     |
+    |   +---+   +------+     | child bus B, on second set of pins
+    |                   \----|------+--------+--------+
+    |                        |      |        |        |
+    +------------------------+  +-----+  +-----+  +-----+
+                                | dev |  | dev |  | dev |
+                                +-----+  +-----+  +-----+
+
+  For each named state defined in the pinctrl-names property, an I2C child bus will be created.
+  I2C child bus numbers are assigned based on the index into the pinctrl-names property.
+
+  The only exception is that no bus will be created for a state named "idle". If such a state is
+  defined, it must be the last entry in pinctrl-names. For example:
+
+    pinctrl-names = "ddc", "pta", "idle"  ->  ddc = bus 0, pta = bus 1
+    pinctrl-names = "ddc", "idle", "pta"  ->  Invalid ("idle" not last)
+    pinctrl-names = "idle", "ddc", "pta"  ->  Invalid ("idle" not last)
+
+  Whenever an access is made to a device on a child bus, the relevant pinctrl state will be
+  programmed into hardware.
+
+  If an idle state is defined, whenever an access is not being made to a device on a child bus,
+  the idle pinctrl state will be programmed into hardware.
+
+  If an idle state is not defined, the most recently used pinctrl state will be left programmed
+  into hardware whenever no access is being made of a device on a child bus.
+
+properties:
+  compatible:
+    const: i2c-mux-pinctrl
+
+  i2c-parent:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: The phandle of the I2C bus that this multiplexer's master-side port is connected
+      to.
+
+allOf:
+  - $ref: i2c-mux.yaml
+
+unevaluatedProperties: false
+
+required:
+  - compatible
+  - i2c-parent
+
+examples:
+  - |
+    i2cmux {
+      compatible = "i2c-mux-pinctrl";
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      i2c-parent = <&i2c1>;
+
+      pinctrl-names = "ddc", "pta", "idle";
+      pinctrl-0 = <&state_i2cmux_ddc>;
+      pinctrl-1 = <&state_i2cmux_pta>;
+      pinctrl-2 = <&state_i2cmux_idle>;
+
+      i2c@0 {
+        reg = <0>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        eeprom@50 {
+          compatible = "atmel,24c02";
+          reg = <0x50>;
+        };
+      };
+
+      i2c@1 {
+        reg = <1>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        eeprom@50 {
+          compatible = "atmel,24c02";
+          reg = <0x50>;
+        };
+      };
+    };

bindings/i2c/i2c-mux-reg.txt

@@ -0,0 +1,74 @@
+Register-based I2C Bus Mux
+
+This binding describes an I2C bus multiplexer that uses a single register
+to route the I2C signals.
+
+Required properties:
+- compatible: i2c-mux-reg
+- i2c-parent: The phandle of the I2C bus that this multiplexer's master-side
+  port is connected to.
+* Standard I2C mux properties. See i2c-mux.yaml in this directory.
+* I2C child bus nodes. See i2c-mux.yaml in this directory.
+
+Optional properties:
+- reg: this pair of <offset size> specifies the register to control the mux.
+  The <offset size> depends on its parent node. It can be any memory-mapped
+  address. The size must be either 1, 2, or 4 bytes. If reg is omitted, the
+  resource of this device will be used.
+- little-endian: The existence indicates the register is in little endian.
+- big-endian: The existence indicates the register is in big endian.
+  If both little-endian and big-endian are omitted, the endianness of the
+  CPU will be used.
+- write-only: The existence indicates the register is write-only.
+- idle-state: value to set the muxer to when idle. When no value is
+  given, it defaults to the last value used.
+
+Whenever an access is made to a device on a child bus, the value set
+in the relevant node's reg property will be output to the register.
+
+If an idle state is defined, using the idle-state (optional) property,
+whenever an access is not being made to a device on a child bus, the
+register will be set according to the idle value.
+
+If an idle state is not defined, the most recently used value will be
+left programmed into the register.
+
+Example of a mux on PCIe card, the host is a powerpc SoC (big endian):
+
+	i2c-mux {
+		/* the <offset size> depends on the address translation
+		 * of the parent device. If omitted, device resource
+		 * will be used instead. The size is to determine
+		 * whether iowrite32, iowrite16, or iowrite8 will be used.
+		 */
+		reg = <0x6028 0x4>;
+		little-endian;		/* little endian register on PCIe */
+		compatible = "i2c-mux-reg";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		i2c-parent = <&i2c1>;
+		i2c@0 {
+			reg = <0>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			si5338: clock-generator@70 {
+				compatible = "silabs,si5338";
+				reg = <0x70>;
+				/* other stuff */
+			};
+		};
+
+		i2c@1 {
+			/* data is written using iowrite32 */
+			reg = <1>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			si5338: clock-generator@70 {
+				compatible = "silabs,si5338";
+				reg = <0x70>;
+				/* other stuff */
+			};
+		};
+	};

bindings/i2c/i2c-mux.yaml

@@ -0,0 +1,87 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-mux.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Common i2c bus multiplexer/switch properties.
+
+maintainers:
+  - Peter Rosin <peda@axentia.se>
+
+description: |+
+  An i2c bus multiplexer/switch will have several child busses that are numbered
+  uniquely in a device dependent manner.  The nodes for an i2c bus
+  multiplexer/switch will have one child node for each child bus.
+
+  For i2c multiplexers/switches that have child nodes that are a mixture of both
+  i2c child busses and other child nodes, the 'i2c-mux' subnode can be used for
+  populating the i2c child busses.  If an 'i2c-mux' subnode is present, only
+  subnodes of this will be considered as i2c child busses.
+
+properties:
+  $nodename:
+    pattern: '^(i2c-?)?mux'
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+patternProperties:
+  '^i2c@[0-9a-f]+$':
+    $ref: /schemas/i2c/i2c-controller.yaml
+    unevaluatedProperties: false
+
+    properties:
+      reg:
+        description: The mux selector sub-bus number for the child I2C bus.
+        maxItems: 1
+
+additionalProperties: true
+
+examples:
+  - |
+    /*
+     * An NXP pca9548 8 channel I2C multiplexer at address 0x70
+     * with two NXP pca8574 GPIO expanders attached, one each to
+     * ports 3 and 4.
+     */
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        i2c-mux@70 {
+            compatible = "nxp,pca9548";
+            reg = <0x70>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            i2c@3 {
+                #address-cells = <1>;
+                #size-cells = <0>;
+                reg = <3>;
+
+                gpio@20 {
+                    compatible = "nxp,pca9555";
+                    gpio-controller;
+                    #gpio-cells = <2>;
+                    reg = <0x20>;
+                };
+            };
+            i2c@4 {
+                #address-cells = <1>;
+                #size-cells = <0>;
+                reg = <4>;
+
+                gpio@20 {
+                    compatible = "nxp,pca9555";
+                    gpio-controller;
+                    #gpio-cells = <2>;
+                    reg = <0x20>;
+                };
+            };
+        };
+    };
+...

bindings/i2c/i2c-mxs.yaml

@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-mxs.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale MXS Inter IC (I2C) Controller
+
+maintainers:
+  - Shawn Guo <shawnguo@kernel.org>
+
+properties:
+  compatible:
+    enum:
+      - fsl,imx23-i2c
+      - fsl,imx28-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clock-frequency:
+    enum: [ 100000, 400000 ]
+
+  dmas:
+    maxItems: 1
+
+  dma-names:
+    const: rx-tx
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - dmas
+  - dma-names
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c@80058000 {
+        compatible = "fsl,imx28-i2c";
+        reg = <0x80058000 2000>;
+        interrupts = <111>;
+        clock-frequency = <100000>;
+        dmas = <&dma_apbx 6>;
+        dma-names = "rx-tx";
+    };

bindings/i2c/i2c-octeon.txt

@@ -0,0 +1,40 @@
+* Two Wire Serial Interface (TWSI) / I2C
+
+- compatible: "cavium,octeon-3860-twsi"
+
+  Compatibility with all cn3XXX, cn5XXX and cn6XXX SOCs.
+
+  or
+
+  compatible: "cavium,octeon-7890-twsi"
+
+  Compatibility with cn78XX SOCs.
+
+- reg: The base address of the TWSI/I2C bus controller register bank.
+
+- #address-cells: Must be <1>.
+
+- #size-cells: Must be <0>.  I2C addresses have no size component.
+
+- interrupts: A single interrupt specifier.
+
+- clock-frequency: The I2C bus clock rate in Hz.
+
+Example:
+	twsi0: i2c@1180000001000 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "cavium,octeon-3860-twsi";
+		reg = <0x11800 0x00001000 0x0 0x200>;
+		interrupts = <0 45>;
+		clock-frequency = <100000>;
+
+		rtc@68 {
+			compatible = "dallas,ds1337";
+			reg = <0x68>;
+		};
+		tmp@4c {
+			compatible = "ti,tmp421";
+			reg = <0x4c>;
+		};
+	};

bindings/i2c/i2c-opal.txt

@@ -0,0 +1,37 @@
+Device-tree bindings for I2C OPAL driver
+----------------------------------------
+
+Most of the device node and properties layout is specific to the firmware and
+used by the firmware itself for configuring the port. From the linux
+perspective, the properties of use are "ibm,port-name" and "ibm,opal-id".
+
+Required properties:
+
+- reg: Port-id within a given master
+- compatible: must be "ibm,opal-i2c"
+- ibm,opal-id: Refers to a specific bus and used to identify it when calling
+	       the relevant OPAL functions.
+- bus-frequency: Operating frequency of the i2c bus (in HZ). Informational for
+		 linux, used by the FW though.
+
+Optional properties:
+- ibm,port-name: Firmware provides this name that uniquely identifies the i2c
+		 port.
+
+The node contains a number of other properties that are used by the FW itself
+and depend on the specific hardware implementation. The example below depicts
+a P8 on-chip bus.
+
+Example:
+
+i2c-bus@0 {
+	reg = <0x0>;
+	bus-frequency = <0x61a80>;
+	compatible = "ibm,power8-i2c-port", "ibm,opal-i2c";
+	ibm,opal-id = <0x1>;
+	ibm,port-name = "p8_00000000_e1p0";
+	#address-cells = <0x1>;
+	phandle = <0x10000006>;
+	#size-cells = <0x0>;
+	linux,phandle = <0x10000006>;
+};

bindings/i2c/i2c-owl.yaml

@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-owl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Actions Semi Owl I2C Controller
+
+maintainers:
+  - Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+
+description: |
+  This I2C controller is found in the Actions Semi Owl SoCs:
+  S500, S700 and S900.
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    enum:
+      - actions,s500-i2c # Actions Semi S500 compatible SoCs
+      - actions,s700-i2c # Actions Semi S700 compatible SoCs
+      - actions,s900-i2c # Actions Semi S900 compatible SoCs
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    description: Phandle of the clock feeding the I2C controller.
+    minItems: 1
+
+  clock-frequency:
+    description: |
+      Desired I2C bus clock frequency in Hz. As only Standard and Fast
+      modes are supported, possible values are 100000 and 400000.
+    enum: [100000, 400000]
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/actions,s900-cmu.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    i2c@e0170000 {
+        compatible = "actions,s900-i2c";
+        reg = <0xe0170000 0x1000>;
+        interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&cmu CLK_I2C0>;
+        clock-frequency = <100000>;
+    };
+
+...

bindings/i2c/i2c-pca-platform.txt

@@ -0,0 +1,27 @@
+* NXP PCA PCA9564/PCA9665 I2C controller
+
+The PCA9564/PCA9665 serves as an interface between most standard
+parallel-bus microcontrollers/microprocessors and the serial I2C-bus
+and allows the parallel bus system to communicate bi-directionally
+with the I2C-bus.
+
+Required properties :
+
+ - reg : Offset and length of the register set for the device
+ - compatible : one of "nxp,pca9564" or "nxp,pca9665"
+
+Optional properties
+ - interrupts : the interrupt number
+ - reset-gpios : gpio specifier for gpio connected to RESET_N pin. As the line
+   is active low, it should be marked GPIO_ACTIVE_LOW.
+ - clock-frequency : I2C bus frequency.
+
+Example:
+	i2c0: i2c@80000 {
+		compatible = "nxp,pca9564";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		reg = <0x80000 0x4>;
+		reset-gpios = <&gpio1 0 GPIO_ACTIVE_LOW>;
+		clock-frequency = <100000>;
+	};

bindings/i2c/i2c-pnx.txt

@@ -0,0 +1,34 @@
+* NXP PNX I2C Controller
+
+Required properties:
+
+ - reg: Offset and length of the register set for the device
+ - compatible: should be "nxp,pnx-i2c"
+ - interrupts: configure one interrupt line
+ - #address-cells: always 1 (for i2c addresses)
+ - #size-cells: always 0
+
+Optional properties:
+
+ - clock-frequency: desired I2C bus clock frequency in Hz, Default: 100000 Hz
+
+Examples:
+
+	i2c1: i2c@400a0000 {
+		compatible = "nxp,pnx-i2c";
+		reg = <0x400a0000 0x100>;
+		interrupt-parent = <&mic>;
+		interrupts = <51 0>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+	};
+
+	i2c2: i2c@400a8000 {
+		compatible = "nxp,pnx-i2c";
+		reg = <0x400a8000 0x100>;
+		interrupt-parent = <&mic>;
+		interrupts = <50 0>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		clock-frequency = <100000>;
+	};

bindings/i2c/i2c-pxa-pci-ce4100.txt

@@ -0,0 +1,93 @@
+CE4100 I2C
+----------
+
+CE4100 has one PCI device which is described as the I2C-Controller. This
+PCI device has three PCI-bars, each bar contains a complete I2C
+controller. So we have a total of three independent I2C-Controllers
+which share only an interrupt line.
+The driver is probed via the PCI-ID and is gathering the information of
+attached devices from the devices tree.
+Grant Likely recommended to use the ranges property to map the PCI-Bar
+number to its physical address and to use this to find the child nodes
+of the specific I2C controller. This were his exact words:
+
+       Here's where the magic happens.  Each entry in
+       ranges describes how the parent pci address space
+       (middle group of 3) is translated to the local
+       address space (first group of 2) and the size of
+       each range (last cell).  In this particular case,
+       the first cell of the local address is chosen to be
+       1:1 mapped to the BARs, and the second is the
+       offset from be base of the BAR (which would be
+       non-zero if you had 2 or more devices mapped off
+       the same BAR)
+
+       ranges allows the address mapping to be described
+       in a way that the OS can interpret without
+       requiring custom device driver code.
+
+This is an example which is used on FalconFalls:
+------------------------------------------------
+	i2c-controller@b,2 {
+		#address-cells = <2>;
+		#size-cells = <1>;
+		compatible = "pci8086,2e68.2",
+				"pci8086,2e68",
+				"pciclass,ff0000",
+				"pciclass,ff00";
+
+		reg = <0x15a00 0x0 0x0 0x0 0x0>;
+		interrupts = <16 1>;
+
+		/* as described by Grant, the first number in the group of
+		* three is the bar number followed by the 64bit bar address
+		* followed by size of the mapping. The bar address
+		* requires also a valid translation in parents ranges
+		* property.
+		*/
+		ranges = <0 0   0x02000000 0 0xdffe0500 0x100
+			  1 0   0x02000000 0 0xdffe0600 0x100
+			  2 0   0x02000000 0 0xdffe0700 0x100>;
+
+		i2c@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "intel,ce4100-i2c-controller";
+
+			/* The first number in the reg property is the
+			* number of the bar
+			*/
+			reg = <0 0 0x100>;
+
+			/* This I2C controller has no devices */
+		};
+
+		i2c@1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "intel,ce4100-i2c-controller";
+			reg = <1 0 0x100>;
+
+			/* This I2C controller has one gpio controller */
+			gpio@26 {
+				#gpio-cells = <2>;
+				compatible = "nxp,pcf8575";
+				reg = <0x26>;
+				gpio-controller;
+			};
+		};
+
+		i2c@2 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "intel,ce4100-i2c-controller";
+			reg = <2 0 0x100>;
+
+			gpio@26 {
+				#gpio-cells = <2>;
+				compatible = "nxp,pcf8575";
+				reg = <0x26>;
+				gpio-controller;
+			};
+		};
+	};

bindings/i2c/i2c-pxa.yaml

@@ -0,0 +1,74 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-pxa.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Marvell MMP I2C controller bindings
+
+maintainers:
+  - Rob Herring <robh+dt@kernel.org>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+  - if:
+      not:
+        required:
+          - mrvl,i2c-polling
+    then:
+      required:
+        - interrupts
+
+properties:
+  compatible:
+    enum:
+      - mrvl,mmp-twsi
+      - mrvl,pxa-i2c
+      - marvell,armada-3700-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+
+  resets:
+    minItems: 1
+
+  mrvl,i2c-polling:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: |
+      Disable interrupt of i2c controller. Polling status register of i2c
+      controller instead.
+
+  mrvl,i2c-fast-mode:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: Enable fast mode of i2c controller.
+
+unevaluatedProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - '#address-cells'
+  - '#size-cells'
+
+examples:
+  - |
+    #include <dt-bindings/clock/marvell,mmp2.h>
+    i2c@d4011000 {
+        compatible = "mrvl,mmp-twsi";
+        reg = <0xd4011000 0x1000>;
+        interrupts = <7>;
+        clocks = <&soc_clocks MMP2_CLK_TWSI1>;
+        mrvl,i2c-fast-mode;
+        #address-cells = <1>;
+        #size-cells = <0>;
+    };
+
+...

bindings/i2c/i2c-rk3x.yaml

@@ -0,0 +1,142 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-rk3x.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip RK3xxx I2C controller
+
+description:
+  This driver interfaces with the native I2C controller present in Rockchip
+  RK3xxx SoCs.
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+maintainers:
+  - Heiko Stuebner <heiko@sntech.de>
+
+# Everything else is described in the common file
+properties:
+  compatible:
+    oneOf:
+      - const: rockchip,rv1108-i2c
+      - const: rockchip,rk3066-i2c
+      - const: rockchip,rk3188-i2c
+      - const: rockchip,rk3228-i2c
+      - const: rockchip,rk3288-i2c
+      - const: rockchip,rk3399-i2c
+      - items:
+          - enum:
+              - rockchip,rk3036-i2c
+              - rockchip,rk3128-i2c
+              - rockchip,rk3368-i2c
+          - const: rockchip,rk3288-i2c
+      - items:
+          - enum:
+              - rockchip,px30-i2c
+              - rockchip,rk3308-i2c
+              - rockchip,rk3328-i2c
+              - rockchip,rk3568-i2c
+              - rockchip,rk3588-i2c
+              - rockchip,rv1126-i2c
+          - const: rockchip,rk3399-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+    items:
+      - description:
+          For older hardware (rk3066, rk3188, rk3228, rk3288)
+          there is one clock that is used both to derive the functional clock
+          for the device and as the bus clock.
+          For newer hardware (rk3399) this clock is used to derive
+          the functional clock
+      - description:
+          For newer hardware (rk3399) this is the bus clock
+
+  clock-names:
+    minItems: 1
+    items:
+      - const: i2c
+      - const: pclk
+
+  rockchip,grf:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Required on RK3066, RK3188 the phandle of the syscon node for
+      the general register file (GRF)
+      On those SoCs an alias with the correct I2C bus ID
+      (bit offset in the GRF) is also required.
+
+  clock-frequency:
+    default: 100000
+    description:
+      SCL frequency to use (in Hz). If omitted, 100kHz is used.
+
+  i2c-scl-rising-time-ns:
+    default: 1000
+    description:
+      Number of nanoseconds the SCL signal takes to rise
+      (t(r) in I2C specification). If not specified this is assumed to be
+      the maximum the specification allows(1000 ns for Standard-mode,
+      300 ns for Fast-mode) which might cause slightly slower communication.
+
+  i2c-scl-falling-time-ns:
+    default: 300
+    description:
+      Number of nanoseconds the SCL signal takes to fall
+      (t(f) in the I2C specification). If not specified this is assumed to
+      be the maximum the specification allows (300 ns) which might cause
+      slightly slower communication.
+
+  i2c-sda-falling-time-ns:
+    default: 300
+    description:
+      Number of nanoseconds the SDA signal takes to fall
+      (t(f) in the I2C specification). If not specified we will use the SCL
+      value since they are the same in nearly all cases.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+if:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - rockchip,rk3066-i2c
+          - rockchip,rk3188-i2c
+
+then:
+  required:
+    - rockchip,grf
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/rk3188-cru-common.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c0: i2c@2002d000 {
+      compatible = "rockchip,rk3188-i2c";
+      reg = <0x2002d000 0x1000>;
+      interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
+      clocks = <&cru PCLK_I2C0>;
+      clock-names = "i2c";
+      rockchip,grf = <&grf>;
+      i2c-scl-falling-time-ns = <100>;
+      i2c-scl-rising-time-ns = <800>;
+      #address-cells = <1>;
+      #size-cells = <0>;
+    };

bindings/i2c/i2c-sprd.txt

@@ -0,0 +1,31 @@
+I2C for Spreadtrum platforms
+
+Required properties:
+- compatible: Should be "sprd,sc9860-i2c".
+- reg: Specify the physical base address of the controller and length
+  of memory mapped region.
+- interrupts: Should contain I2C interrupt.
+- clock-names: Should contain following entries:
+  "i2c" for I2C clock,
+  "source" for I2C source (parent) clock,
+  "enable" for I2C module enable clock.
+- clocks: Should contain a clock specifier for each entry in clock-names.
+- clock-frequency: Constains desired I2C bus clock frequency in Hz.
+- #address-cells: Should be 1 to describe address cells for I2C device address.
+- #size-cells: Should be 0 means no size cell for I2C device address.
+
+Optional properties:
+- Child nodes conforming to I2C bus binding
+
+Examples:
+i2c0: i2c@70500000 {
+	compatible = "sprd,sc9860-i2c";
+	reg = <0 0x70500000 0 0x1000>;
+	interrupts = <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>;
+	clock-names = "i2c", "source", "enable";
+	clocks = <&clk_i2c3>, <&ext_26m>, <&clk_ap_apb_gates 11>;
+	clock-frequency = <400000>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+};
+

bindings/i2c/i2c-st.txt

@@ -0,0 +1,41 @@
+ST SSC binding, for I2C mode operation
+
+Required properties :
+- compatible : Must be "st,comms-ssc-i2c" or "st,comms-ssc4-i2c"
+- reg : Offset and length of the register set for the device
+- interrupts : the interrupt specifier
+- clock-names: Must contain "ssc".
+- clocks: Must contain an entry for each name in clock-names. See the common
+  clock bindings.
+- A pinctrl state named "default" must be defined to set pins in mode of
+  operation for I2C transfer.
+
+Optional properties :
+- clock-frequency : Desired I2C bus clock frequency in Hz. If not specified,
+  the default 100 kHz frequency will be used. As only Normal and Fast modes
+  are supported, possible values are 100000 and 400000.
+- st,i2c-min-scl-pulse-width-us : The minimum valid SCL pulse width that is
+  allowed through the deglitch circuit. In units of us.
+- st,i2c-min-sda-pulse-width-us : The minimum valid SDA pulse width that is
+  allowed through the deglitch circuit. In units of us.
+- A pinctrl state named "idle" could be defined to set pins in idle state
+  when I2C instance is not performing a transfer.
+- A pinctrl state named "sleep" could be defined to set pins in sleep state
+  when driver enters in suspend.
+
+
+
+Example :
+
+i2c0: i2c@fed40000 {
+	compatible	= "st,comms-ssc4-i2c";
+	reg		= <0xfed40000 0x110>;
+	interrupts	=  <GIC_SPI 187 IRQ_TYPE_LEVEL_HIGH>;
+	clocks		= <&clk_s_a0_ls CLK_ICN_REG>;
+	clock-names	= "ssc";
+	clock-frequency = <400000>;
+	pinctrl-names	= "default";
+	pinctrl-0	= <&pinctrl_i2c0_default>;
+	st,i2c-min-scl-pulse-width-us = <0>;
+	st,i2c-min-sda-pulse-width-us = <5>;
+};

bindings/i2c/i2c-synquacer.txt

@@ -0,0 +1,29 @@
+Socionext SynQuacer I2C
+
+Required properties:
+- compatible      : Must be "socionext,synquacer-i2c"
+- reg             : Offset and length of the register set for the device
+- interrupts      : A single interrupt specifier
+- #address-cells  : Must be <1>;
+- #size-cells     : Must be <0>;
+- clock-names     : Must contain "pclk".
+- clocks          : Must contain an entry for each name in clock-names.
+                    (See the common clock bindings.)
+
+Optional properties:
+- clock-frequency : Desired I2C bus clock frequency in Hz. As only Normal and
+                    Fast modes are supported, possible values are 100000 and
+                    400000.
+
+Example :
+
+    i2c@51210000 {
+        compatible = "socionext,synquacer-i2c";
+        reg = <0x51210000 0x1000>;
+        interrupts = <GIC_SPI 165 IRQ_TYPE_LEVEL_HIGH>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        clock-names = "pclk";
+        clocks = <&clk_i2c>;
+        clock-frequency = <400000>;
+    };

bindings/i2c/i2c-virtio.yaml

@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-virtio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Virtio I2C Adapter
+
+maintainers:
+  - Viresh Kumar <viresh.kumar@linaro.org>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+  - $ref: /schemas/virtio/virtio-device.yaml#
+
+description:
+  Virtio I2C device, see /schemas/virtio/virtio-device.yaml for more details.
+
+properties:
+  $nodename:
+    const: i2c
+
+  compatible:
+    const: virtio,device22
+
+required:
+  - compatible
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    virtio@3000 {
+        compatible = "virtio,mmio";
+        reg = <0x3000 0x100>;
+        interrupts = <41>;
+
+        i2c {
+            compatible = "virtio,device22";
+
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            light-sensor@20 {
+                compatible = "dynaimage,al3320a";
+                reg = <0x20>;
+            };
+        };
+    };
+
+...

bindings/i2c/i2c-wmt.txt

@@ -0,0 +1,24 @@
+* Wondermedia I2C Controller
+
+Required properties :
+
+ - compatible : should be "wm,wm8505-i2c"
+ - reg : Offset and length of the register set for the device
+ - interrupts : <IRQ> where IRQ is the interrupt number
+ - clocks : phandle to the I2C clock source
+
+Optional properties :
+
+ - clock-frequency : desired I2C bus clock frequency in Hz.
+	Valid values are 100000 and 400000.
+	Default to 100000 if not specified, or invalid value.
+
+Example :
+
+	i2c_0: i2c@d8280000 {
+		compatible = "wm,wm8505-i2c";
+		reg = <0xd8280000 0x1000>;
+		interrupts = <19>;
+		clocks = <&clki2c0>;
+		clock-frequency = <400000>;
+	};

bindings/i2c/i2c-xgene-slimpro.txt

@@ -0,0 +1,15 @@
+APM X-Gene SLIMpro Mailbox I2C Driver
+
+An I2C controller accessed over the "SLIMpro" mailbox.
+
+Required properties :
+
+ - compatible : should be "apm,xgene-slimpro-i2c"
+ - mboxes : use the label reference for the mailbox as the first parameter.
+	    The second parameter is the channel number.
+
+Example :
+	i2cslimpro {
+		compatible = "apm,xgene-slimpro-i2c";
+		mboxes = <&mailbox 0>;
+	};

bindings/i2c/i2c.txt

@@ -0,0 +1,151 @@
+Generic device tree bindings for I2C busses
+===========================================
+
+This document describes generic bindings which can be used to describe I2C
+busses and their child devices in a device tree.
+
+Required properties (per bus)
+-----------------------------
+
+- #address-cells  - should be <1>. Read more about addresses below.
+- #size-cells     - should be <0>.
+- compatible      - name of I2C bus controller
+
+For other required properties e.g. to describe register sets,
+clocks, etc. check the binding documentation of the specific driver.
+
+The cells properties above define that an address of children of an I2C bus
+are described by a single value.
+
+Optional properties (per bus)
+-----------------------------
+
+These properties may not be supported by all drivers. However, if a driver
+wants to support one of the below features, it should adapt these bindings.
+
+- clock-frequency
+	frequency of bus clock in Hz.
+
+- i2c-bus
+	For I2C adapters that have child nodes that are a mixture of both I2C
+	devices and non-I2C devices, the 'i2c-bus' subnode can be used for
+	populating I2C devices. If the 'i2c-bus' subnode is present, only
+	subnodes of this will be considered as I2C slaves. The properties,
+	'#address-cells' and '#size-cells' must be defined under this subnode
+	if present.
+
+- i2c-scl-falling-time-ns
+	Number of nanoseconds the SCL signal takes to fall; t(f) in the I2C
+	specification.
+
+- i2c-scl-internal-delay-ns
+	Number of nanoseconds the IP core additionally needs to setup SCL.
+
+- i2c-scl-rising-time-ns
+	Number of nanoseconds the SCL signal takes to rise; t(r) in the I2C
+	specification.
+
+- i2c-sda-falling-time-ns
+	Number of nanoseconds the SDA signal takes to fall; t(f) in the I2C
+	specification.
+
+- i2c-analog-filter
+	Enable analog filter for i2c lines.
+
+- i2c-digital-filter
+	Enable digital filter for i2c lines.
+
+- i2c-digital-filter-width-ns
+	Width of spikes which can be filtered by digital filter
+	(i2c-digital-filter). This width is specified in nanoseconds.
+
+- i2c-analog-filter-cutoff-frequency
+	Frequency that the analog filter (i2c-analog-filter) uses to distinguish
+	which signal to filter. Signal with higher frequency than specified will
+	be filtered out. Only lower frequency will pass (this is applicable to
+	a low-pass analog filter). Typical value should be above the normal
+	i2c bus clock frequency (clock-frequency).
+	Specified in Hz.
+
+- multi-master
+	states that there is another master active on this bus. The OS can use
+	this information to adapt power management to keep the arbitration awake
+	all the time, for example. Can not be combined with 'single-master'.
+
+- pinctrl
+	add extra pinctrl to configure SCL/SDA pins to GPIO function for bus
+	recovery, call it "gpio" or "recovery" (deprecated) state
+
+- scl-gpios
+	specify the gpio related to SCL pin. Used for GPIO bus recovery.
+
+- sda-gpios
+	specify the gpio related to SDA pin. Optional for GPIO bus recovery.
+
+- single-master
+	states that there is no other master active on this bus. The OS can use
+	this information to detect a stalled bus more reliably, for example.
+	Can not be combined with 'multi-master'.
+
+- smbus
+	states that additional SMBus restrictions and features apply to this bus.
+	An example of feature is SMBusHostNotify. Examples of restrictions are
+	more reserved addresses and timeout definitions.
+
+- smbus-alert
+	states that the optional SMBus-Alert feature apply to this bus.
+
+- mctp-controller
+	indicates that the system is accessible via this bus as an endpoint for
+	MCTP over I2C transport.
+
+Required properties (per child device)
+--------------------------------------
+
+- compatible
+	name of I2C slave device
+
+- reg
+	One or many I2C slave addresses. These are usually a 7 bit addresses.
+	However, flags can be attached to an address. I2C_TEN_BIT_ADDRESS is
+	used to mark a 10 bit address. It is needed to avoid the ambiguity
+	between e.g. a 7 bit address of 0x50 and a 10 bit address of 0x050
+	which, in theory, can be on the same bus.
+	Another flag is I2C_OWN_SLAVE_ADDRESS to mark addresses on which we
+	listen to be devices ourselves.
+
+Optional properties (per child device)
+--------------------------------------
+
+These properties may not be supported by all drivers. However, if a driver
+wants to support one of the below features, it should adapt these bindings.
+
+- host-notify
+	device uses SMBus host notify protocol instead of interrupt line.
+
+- interrupts
+	interrupts used by the device.
+
+- interrupt-names
+	"irq", "wakeup" and "smbus_alert" names are recognized by I2C core,
+	other names are	left to individual drivers.
+
+- reg-names
+	Names of map programmable addresses.
+	It can contain any map needing another address than default one.
+
+- wakeup-source
+	device can be used as a wakeup source.
+
+Binding may contain optional "interrupts" property, describing interrupts
+used by the device. I2C core will assign "irq" interrupt (or the very first
+interrupt if not using interrupt names) as primary interrupt for the slave.
+
+Alternatively, devices supporting SMBus Host Notify, and connected to
+adapters that support this feature, may use "host-notify" property. I2C
+core will create a virtual interrupt for Host Notify and assign it as
+primary interrupt for the slave.
+
+Also, if device is marked as a wakeup source, I2C core will set up "wakeup"
+interrupt for the device. If "wakeup" interrupt name is not present in the
+binding, then primary interrupt will be used as wakeup interrupt.

bindings/i2c/ingenic,i2c.yaml

@@ -0,0 +1,90 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/ingenic,i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Ingenic SoCs I2C controller devicetree bindings
+
+maintainers:
+  - Paul Cercueil <paul@crapouillou.net>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  $nodename:
+    pattern: "^i2c@[0-9a-f]+$"
+
+  compatible:
+    oneOf:
+      - enum:
+          - ingenic,jz4770-i2c
+          - ingenic,x1000-i2c
+      - items:
+          - const: ingenic,jz4780-i2c
+          - const: ingenic,jz4770-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-frequency:
+    enum: [ 100000, 400000 ]
+
+  dmas:
+    items:
+      - description: DMA controller phandle and request line for RX
+      - description: DMA controller phandle and request line for TX
+
+  dma-names:
+    items:
+      - const: rx
+      - const: tx
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-frequency
+  - dmas
+  - dma-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/ingenic,jz4780-cgu.h>
+    #include <dt-bindings/dma/jz4780-dma.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c@10054000 {
+      compatible = "ingenic,jz4780-i2c", "ingenic,jz4770-i2c";
+      #address-cells = <1>;
+      #size-cells = <0>;
+      reg = <0x10054000 0x1000>;
+
+      interrupts = <56 IRQ_TYPE_LEVEL_LOW>;
+
+      clocks = <&cgu JZ4780_CLK_SMB4>;
+      pinctrl-names = "default";
+      pinctrl-0 = <&pins_i2c4_data>;
+
+      dmas = <&dma JZ4780_DMA_SMB4_RX 0xffffffff>,
+             <&dma JZ4780_DMA_SMB4_TX 0xffffffff>;
+      dma-names = "rx", "tx";
+
+      clock-frequency = <400000>;
+
+      rtc@51 {
+        compatible = "nxp,pcf8563";
+        reg = <0x51>;
+
+        interrupts = <30 IRQ_TYPE_LEVEL_LOW>;
+      };
+    };

bindings/i2c/marvell,mv64xxx-i2c.yaml

@@ -0,0 +1,140 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/marvell,mv64xxx-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Marvell MV64XXX I2C Controller
+
+maintainers:
+  - Gregory CLEMENT <gregory.clement@bootlin.com>
+
+properties:
+  compatible:
+    oneOf:
+      - const: allwinner,sun4i-a10-i2c
+      - items:
+          - const: allwinner,sun7i-a20-i2c
+          - const: allwinner,sun4i-a10-i2c
+      - const: allwinner,sun6i-a31-i2c
+      - items:
+          - enum:
+              - allwinner,sun8i-a23-i2c
+              - allwinner,sun8i-a83t-i2c
+              - allwinner,sun8i-v536-i2c
+              - allwinner,sun50i-a64-i2c
+              - allwinner,sun50i-h6-i2c
+          - const: allwinner,sun6i-a31-i2c
+      - description: Allwinner SoCs with offload support
+        items:
+          - enum:
+              - allwinner,sun20i-d1-i2c
+              - allwinner,sun50i-a100-i2c
+              - allwinner,sun50i-h616-i2c
+              - allwinner,sun50i-r329-i2c
+          - const: allwinner,sun8i-v536-i2c
+          - const: allwinner,sun6i-a31-i2c
+      - const: marvell,mv64xxx-i2c
+      - const: marvell,mv78230-i2c
+      - const: marvell,mv78230-a0-i2c
+
+    description:
+      Only use "marvell,mv78230-a0-i2c" for a very rare, initial
+      version of the SoC which had broken offload support. Linux
+      auto-detects this and sets it appropriately.
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+    items:
+      - description: Reference clock for the I2C bus
+      - description: Bus clock (Only for Armada 7K/8K)
+
+  clock-names:
+    minItems: 1
+    items:
+      - const: core
+      - const: reg
+    description:
+      Mandatory if two clocks are used (only for Armada 7k and 8k).
+
+  resets:
+    maxItems: 1
+
+  dmas:
+    items:
+      - description: RX DMA Channel
+      - description: TX DMA Channel
+
+  dma-names:
+    items:
+      - const: rx
+      - const: tx
+
+dependencies:
+  dmas: [ dma-names ]
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - allwinner,sun4i-a10-i2c
+              - allwinner,sun6i-a31-i2c
+
+    then:
+      required:
+        - clocks
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: allwinner,sun6i-a31-i2c
+
+    then:
+      required:
+        - resets
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c@11000 {
+        compatible = "marvell,mv64xxx-i2c";
+        reg = <0x11000 0x20>;
+        interrupts = <29>;
+        clock-frequency = <100000>;
+    };
+
+  - |
+    i2c@11000 {
+        compatible = "marvell,mv78230-i2c";
+        reg = <0x11000 0x100>;
+        interrupts = <29>;
+        clock-frequency = <100000>;
+    };
+
+  - |
+    i2c@701000 {
+        compatible = "marvell,mv78230-i2c";
+        reg = <0x701000 0x20>;
+        interrupts = <29>;
+        clock-frequency = <100000>;
+        clock-names = "core", "reg";
+        clocks = <&core_clock>, <&reg_clock>;
+    };
+
+...

bindings/i2c/mediatek,mt7621-i2c.yaml

@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/mediatek,mt7621-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+maintainers:
+  - Stefan Roese <sr@denx.de>
+
+title: Mediatek MT7621/MT7628 I2C master controller
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    const: mediatek,mt7621-i2c
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: i2c
+
+  resets:
+    maxItems: 1
+
+  reset-names:
+    const: i2c
+
+required:
+  - compatible
+  - reg
+  - resets
+  - "#address-cells"
+  - "#size-cells"
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/mt7621-clk.h>
+    #include <dt-bindings/reset/mt7621-reset.h>
+
+    i2c: i2c@900 {
+      compatible = "mediatek,mt7621-i2c";
+      reg = <0x900 0x100>;
+      clocks = <&sysc MT7621_CLK_I2C>;
+      clock-names = "i2c";
+      resets = <&sysc MT7621_RST_I2C>;
+      reset-names = "i2c";
+
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      pinctrl-names = "default";
+      pinctrl-0 = <&i2c_pins>;
+    };

bindings/i2c/microchip,corei2c.yaml

@@ -0,0 +1,56 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/microchip,corei2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip MPFS I2C Controller
+
+maintainers:
+  - Daire McNamara <daire.mcnamara@microchip.com>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - const: microchip,mpfs-i2c # Microchip PolarFire SoC compatible SoCs
+          - const: microchip,corei2c-rtl-v7 # Microchip Fabric based i2c IP core
+      - const: microchip,corei2c-rtl-v7 # Microchip Fabric based i2c IP core
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-frequency:
+    description: |
+      Desired I2C bus clock frequency in Hz. As only Standard and Fast
+      modes are supported, possible values are 100000 and 400000.
+    enum: [100000, 400000]
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c@2010a000 {
+      compatible = "microchip,mpfs-i2c", "microchip,corei2c-rtl-v7";
+      reg = <0x2010a000 0x1000>;
+      clocks = <&clkcfg 15>;
+      interrupt-parent = <&plic>;
+      interrupts = <58>;
+      clock-frequency = <100000>;
+    };
+...

bindings/i2c/nuvoton,npcm7xx-i2c.yaml

@@ -0,0 +1,77 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/nuvoton,npcm7xx-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: nuvoton NPCM7XX I2C Controller
+
+description: |
+  I2C bus controllers of the NPCM series support both master and
+  slave mode. Each controller can switch between master and slave at run time
+  (i.e. IPMB mode). HW FIFO for TX and RX are supported.
+
+maintainers:
+  - Tali Perry <tali.perry1@gmail.com>
+
+properties:
+  compatible:
+    enum:
+      - nuvoton,npcm750-i2c
+      - nuvoton,npcm845-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+    description: Reference clock for the I2C bus
+
+  clock-frequency:
+    description: Desired I2C bus clock frequency in Hz. If not specified,
+                 the default 100 kHz frequency will be used.
+                 possible values are 100000, 400000 and 1000000.
+    default: 100000
+    enum: [100000, 400000, 1000000]
+
+  nuvoton,sys-mgr:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: The phandle of system manager register node.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: nuvoton,npcm845-i2c
+
+    then:
+      required:
+        - nuvoton,sys-mgr
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/nuvoton,npcm7xx-clock.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    i2c0: i2c@80000 {
+        reg = <0x80000 0x1000>;
+        clocks = <&clk NPCM7XX_CLK_APB2>;
+        clock-frequency = <100000>;
+        interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>;
+        compatible = "nuvoton,npcm750-i2c";
+        nuvoton,sys-mgr = <&gcr>;
+    };
+
+...

bindings/i2c/nvidia,tegra186-bpmp-i2c.yaml

@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/nvidia,tegra186-bpmp-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NVIDIA Tegra186 (and later) BPMP I2C controller
+
+maintainers:
+  - Thierry Reding <thierry.reding@gmail.com>
+  - Jon Hunter <jonathanh@nvidia.com>
+
+description: |
+  In Tegra186 and later, the BPMP (Boot and Power Management Processor)
+  owns certain HW devices, such as the I2C controller for the power
+  management I2C bus. Software running on other CPUs must perform IPC to
+  the BPMP in order to execute transactions on that I2C bus. This
+  binding describes an I2C bus that is accessed in such a fashion.
+
+  The BPMP I2C node must be located directly inside the main BPMP node.
+  See ../firmware/nvidia,tegra186-bpmp.yaml for details of the BPMP
+  binding.
+
+  This node represents an I2C controller. See ../i2c/i2c.txt for details
+  of the core I2C binding.
+
+properties:
+  compatible:
+    const: nvidia,tegra186-bpmp-i2c
+
+  nvidia,bpmp-bus-id:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Indicates the I2C bus number this DT node represents,
+      as defined by the BPMP firmware.
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml
+
+unevaluatedProperties: false
+
+required:
+  - compatible
+  - "#address-cells"
+  - "#size-cells"
+  - nvidia,bpmp-bus-id

bindings/i2c/nvidia,tegra20-i2c.yaml

@@ -0,0 +1,192 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/nvidia,tegra20-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+maintainers:
+  - Thierry Reding <thierry.reding@gmail.com>
+  - Jon Hunter <jonathanh@nvidia.com>
+
+title: NVIDIA Tegra I2C controller driver
+
+properties:
+  compatible:
+    oneOf:
+      - description: Tegra20 has 4 generic I2C controller. This can support
+          master and slave mode of I2C communication. The i2c-tegra driver
+          only support master mode of I2C communication. Driver of I2C
+          controller is only compatible with "nvidia,tegra20-i2c".
+        const: nvidia,tegra20-i2c
+      - description: Tegra20 has specific I2C controller called as DVC I2C
+          controller. This only support master mode of I2C communication.
+          Register interface/offset and interrupts handling are different than
+          generic I2C controller. Driver of DVC I2C controller is only
+          compatible with "nvidia,tegra20-i2c-dvc".
+        const: nvidia,tegra20-i2c-dvc
+      - description: |
+          Tegra30 has 5 generic I2C controller. This controller is very much
+          similar to Tegra20 I2C controller with additional feature: Continue
+          Transfer Support. This feature helps to implement M_NO_START as per
+          I2C core API transfer flags. Driver of I2C controller is compatible
+          with "nvidia,tegra30-i2c" to enable the continue transfer support.
+          This is also compatible with "nvidia,tegra20-i2c" without continue
+          transfer support.
+        items:
+          - const: nvidia,tegra30-i2c
+          - const: nvidia,tegra20-i2c
+      - description: |
+          Tegra114 has 5 generic I2C controllers. This controller is very much
+          similar to Tegra30 I2C controller with some hardware modification:
+            - Tegra30/Tegra20 I2C controller has 2 clock source called div-clk
+              and fast-clk. Tegra114 has only one clock source called as
+              div-clk and hence clock mechanism is changed in I2C controller.
+            - Tegra30/Tegra20 I2C controller has enabled per packet transfer
+              by default and there is no way to disable it. Tegra114 has this
+              interrupt disable by default and SW need to enable explicitly.
+          Due to above changes, Tegra114 I2C driver makes incompatible with
+          previous hardware driver. Hence, Tegra114 I2C controller is
+          compatible with "nvidia,tegra114-i2c".
+        const: nvidia,tegra114-i2c
+      - description: |
+          Tegra124 has 6 generic I2C controllers. These controllers are very
+          similar to those found on Tegra114 but also contain several hardware
+          improvements and new registers.
+        const: nvidia,tegra124-i2c
+      - description: |
+          Tegra210 has 6 generic I2C controllers. These controllers are very
+          similar to those found on Tegra124.
+        items:
+          - const: nvidia,tegra210-i2c
+          - const: nvidia,tegra124-i2c
+      - description: |
+          Tegra210 has one I2C controller that is on host1x bus and is part of
+          the VE power domain and typically used for camera use-cases. This VI
+          I2C controller is mostly compatible with the programming model of
+          the regular I2C controllers with a few exceptions. The I2C registers
+          start at an offset of 0xc00 (instead of 0), registers are 16 bytes
+          apart (rather than 4) and the controller does not support slave
+          mode.
+        const: nvidia,tegra210-i2c-vi
+      - description: |
+          Tegra186 has 9 generic I2C controllers, two of which are in the AON
+          (always-on) partition of the SoC. All of these controllers are very
+          similar to those found on Tegra210.
+        const: nvidia,tegra186-i2c
+      - description: |
+          Tegra194 has 8 generic I2C controllers, two of which are in the AON
+          (always-on) partition of the SoC. All of these controllers are very
+          similar to those found on Tegra186. However, these controllers have
+          support for 64 KiB transactions whereas earlier chips supported no
+          more than 4 KiB per transactions.
+        const: nvidia,tegra194-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+  clocks:
+    minItems: 1
+    maxItems: 2
+
+  clock-names:
+    minItems: 1
+    maxItems: 2
+
+  resets:
+    items:
+      - description: module reset
+
+  reset-names:
+    items:
+      - const: i2c
+
+  dmas:
+    items:
+      - description: DMA channel for the reception FIFO
+      - description: DMA channel for the transmission FIFO
+
+  dma-names:
+    items:
+      - const: rx
+      - const: tx
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - nvidia,tegra20-i2c
+              - nvidia,tegra30-i2c
+    then:
+      properties:
+        clock-names:
+          items:
+            - const: div-clk
+            - const: fast-clk
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: nvidia,tegra114-i2c
+    then:
+      properties:
+        clock-names:
+          items:
+            - const: div-clk
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: nvidia,tegra210-i2c
+    then:
+      properties:
+        clock-names:
+          items:
+            - const: div-clk
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: nvidia,tegra210-i2c-vi
+    then:
+      properties:
+        clock-names:
+          items:
+            - const: div-clk
+            - const: slow
+        power-domains:
+          items:
+            - description: phandle to the VENC power domain
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c@7000c000 {
+        compatible = "nvidia,tegra20-i2c";
+        reg = <0x7000c000 0x100>;
+        interrupts = <0 38 0x04>;
+        clocks = <&tegra_car 12>, <&tegra_car 124>;
+        clock-names = "div-clk", "fast-clk";
+        resets = <&tegra_car 12>;
+        reset-names = "i2c";
+        dmas = <&apbdma 16>, <&apbdma 16>;
+        dma-names = "rx", "tx";
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+    };

bindings/i2c/nxp,pca9541.txt

@@ -0,0 +1,29 @@
+* NXP PCA9541 I2C bus master selector
+
+Required Properties:
+
+  - compatible: Must be "nxp,pca9541"
+
+  - reg: The I2C address of the device.
+
+  The following required properties are defined externally:
+
+  - I2C arbitration bus node. See i2c-arb.txt in this directory.
+
+
+Example:
+
+	i2c-arbitrator@74 {
+		compatible = "nxp,pca9541";
+		reg = <0x74>;
+
+		i2c-arb {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			eeprom@54 {
+				compatible = "atmel,24c08";
+				reg = <0x54>;
+			};
+		};
+	};

bindings/i2c/opencores,i2c-ocores.yaml

@@ -0,0 +1,113 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/opencores,i2c-ocores.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: OpenCores I2C controller
+
+maintainers:
+  - Peter Korsgaard <peter@korsgaard.com>
+  - Andrew Lunn <andrew@lunn.ch>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - sifive,fu740-c000-i2c # Opencore based IP block FU740-C000 SoC
+              - sifive,fu540-c000-i2c # Opencore based IP block FU540-C000 SoC
+          - const: sifive,i2c0
+      - enum:
+          - opencores,i2c-ocores
+          - aeroflexgaisler,i2cmst
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-frequency:
+    description: |
+      clock-frequency property is meant to control the bus frequency for i2c bus
+      drivers, but it was incorrectly used to specify i2c controller input clock
+      frequency. So the following rules are set to fix this situation:
+      - if clock-frequency is present and neither opencores,ip-clock-frequency nor
+        clocks are, then clock-frequency specifies i2c controller clock frequency.
+        This is to keep backwards compatibility with setups using old DTB. i2c bus
+        frequency is fixed at 100 KHz.
+      - if clocks is present it specifies i2c controller clock. clock-frequency
+        property specifies i2c bus frequency.
+      - if opencores,ip-clock-frequency is present it specifies i2c controller
+        clock frequency. clock-frequency property specifies i2c bus frequency.
+    default: 100000
+
+  reg-io-width:
+    description: |
+      io register width in bytes
+    enum: [1, 2, 4]
+
+  reg-shift:
+    description: |
+      device register offsets are shifted by this value
+    default: 0
+
+  regstep:
+    description: |
+      deprecated, use reg-shift above
+    deprecated: true
+
+  opencores,ip-clock-frequency:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      Frequency of the controller clock in Hz. Mutually exclusive with clocks.
+      See the note above.
+
+required:
+  - compatible
+  - reg
+  - "#address-cells"
+  - "#size-cells"
+
+oneOf:
+  - required:
+      - opencores,ip-clock-frequency
+  - required:
+      - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c@a0000000 {
+      compatible = "opencores,i2c-ocores";
+      reg = <0xa0000000 0x8>;
+      #address-cells = <1>;
+      #size-cells = <0>;
+      interrupts = <10>;
+      opencores,ip-clock-frequency = <20000000>;
+
+      reg-shift = <0>;	/* 8 bit registers */
+      reg-io-width = <1>;	/* 8 bit read/write */
+    };
+
+    i2c@b0000000 {
+      compatible = "opencores,i2c-ocores";
+      reg = <0xa0000000 0x8>;
+      #address-cells = <1>;
+      #size-cells = <0>;
+      interrupts = <10>;
+      clocks = <&osc>;
+      clock-frequency = <400000>; /* i2c bus frequency 400 KHz */
+
+      reg-shift = <0>;	/* 8 bit registers */
+      reg-io-width = <1>;	/* 8 bit read/write */
+    };
+...

bindings/i2c/qcom,i2c-cci.yaml

@@ -0,0 +1,262 @@
+# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/qcom,i2c-cci.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Camera Control Interface (CCI) I2C controller
+
+maintainers:
+  - Loic Poulain <loic.poulain@linaro.org>
+  - Robert Foss <robert.foss@linaro.org>
+
+properties:
+  compatible:
+    enum:
+      - qcom,msm8226-cci
+      - qcom,msm8916-cci
+      - qcom,msm8974-cci
+      - qcom,msm8996-cci
+      - qcom,sdm845-cci
+      - qcom,sm8250-cci
+      - qcom,sm8450-cci
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+  clocks:
+    minItems: 3
+    maxItems: 6
+
+  clock-names:
+    minItems: 3
+    maxItems: 6
+
+  interrupts:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  reg:
+    maxItems: 1
+
+patternProperties:
+  "^i2c-bus@[01]$":
+    $ref: /schemas/i2c/i2c-controller.yaml#
+    unevaluatedProperties: false
+
+    properties:
+      reg:
+        maxItems: 1
+
+      clock-frequency:
+        default: 100000
+
+required:
+  - compatible
+  - clock-names
+  - clocks
+  - interrupts
+  - reg
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,msm8996-cci
+    then:
+      required:
+        - power-domains
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,msm8226-cci
+              - qcom,msm8916-cci
+    then:
+      properties:
+        i2c-bus@1: false
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,msm8226-cci
+              - qcom,msm8974-cci
+    then:
+      properties:
+        clocks:
+          maxItems: 3
+        clock-names:
+          items:
+            - const: camss_top_ahb
+            - const: cci_ahb
+            - const: cci
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,msm8916-cci
+              - qcom,msm8996-cci
+    then:
+      properties:
+        clocks:
+          maxItems: 4
+        clock-names:
+          items:
+            - const: camss_top_ahb
+            - const: cci_ahb
+            - const: cci
+            - const: camss_ahb
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,sdm845-cci
+    then:
+      properties:
+        clocks:
+          minItems: 6
+        clock-names:
+          items:
+            - const: camnoc_axi
+            - const: soc_ahb
+            - const: slow_ahb_src
+            - const: cpas_ahb
+            - const: cci
+            - const: cci_src
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,sm8250-cci
+              - qcom,sm8450-cci
+    then:
+      properties:
+        clocks:
+          minItems: 5
+          maxItems: 5
+        clock-names:
+          items:
+            - const: camnoc_axi
+            - const: slow_ahb_src
+            - const: cpas_ahb
+            - const: cci
+            - const: cci_src
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,camcc-sdm845.h>
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    cci@ac4a000 {
+        reg = <0x0ac4a000 0x4000>;
+        compatible = "qcom,sdm845-cci";
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        interrupts = <GIC_SPI 460 IRQ_TYPE_EDGE_RISING>;
+        power-domains = <&clock_camcc TITAN_TOP_GDSC>;
+
+        clocks = <&clock_camcc CAM_CC_CAMNOC_AXI_CLK>,
+                 <&clock_camcc CAM_CC_SOC_AHB_CLK>,
+                 <&clock_camcc CAM_CC_SLOW_AHB_CLK_SRC>,
+                 <&clock_camcc CAM_CC_CPAS_AHB_CLK>,
+                 <&clock_camcc CAM_CC_CCI_CLK>,
+                 <&clock_camcc CAM_CC_CCI_CLK_SRC>;
+        clock-names = "camnoc_axi",
+                      "soc_ahb",
+                      "slow_ahb_src",
+                      "cpas_ahb",
+                      "cci",
+                      "cci_src";
+
+        assigned-clocks = <&clock_camcc CAM_CC_CAMNOC_AXI_CLK>,
+                          <&clock_camcc CAM_CC_CCI_CLK>;
+        assigned-clock-rates = <80000000>,
+                               <37500000>;
+
+        pinctrl-names = "default", "sleep";
+        pinctrl-0 = <&cci0_default &cci1_default>;
+        pinctrl-1 = <&cci0_sleep &cci1_sleep>;
+
+        i2c-bus@0 {
+            reg = <0>;
+            clock-frequency = <1000000>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            camera@10 {
+                compatible = "ovti,ov8856";
+                reg = <0x10>;
+
+                reset-gpios = <&tlmm 9 GPIO_ACTIVE_LOW>;
+                pinctrl-names = "default";
+                pinctrl-0 = <&cam0_default>;
+
+                clocks = <&clock_camcc CAM_CC_MCLK0_CLK>;
+                clock-names = "xvclk";
+                clock-frequency = <19200000>;
+
+                dovdd-supply = <&vreg_lvs1a_1p8>;
+                avdd-supply = <&cam0_avdd_2v8>;
+                dvdd-supply = <&cam0_dvdd_1v2>;
+
+                port {
+                    ov8856_ep: endpoint {
+                        link-frequencies = /bits/ 64 <360000000 180000000>;
+                        data-lanes = <1 2 3 4>;
+                        remote-endpoint = <&csiphy0_ep>;
+                    };
+                };
+            };
+        };
+
+        cci_i2c1: i2c-bus@1 {
+            reg = <1>;
+            clock-frequency = <1000000>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            camera@60 {
+                compatible = "ovti,ov7251";
+                reg = <0x60>;
+
+                enable-gpios = <&tlmm 21 GPIO_ACTIVE_HIGH>;
+                pinctrl-names = "default";
+                pinctrl-0 = <&cam3_default>;
+
+                clocks = <&clock_camcc CAM_CC_MCLK3_CLK>;
+                clock-names = "xclk";
+                clock-frequency = <24000000>;
+
+                vdddo-supply = <&vreg_lvs1a_1p8>;
+                vdda-supply = <&cam3_avdd_2v8>;
+
+                port {
+                    ov7251_ep: endpoint {
+                        data-lanes = <0 1>;
+                        remote-endpoint = <&csiphy3_ep>;
+                    };
+                };
+            };
+        };
+    };

bindings/i2c/qcom,i2c-geni-qcom.yaml

@@ -0,0 +1,100 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/i2c/qcom,i2c-geni-qcom.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Qualcomm Geni based QUP I2C Controller
+
+maintainers:
+  - Andy Gross <agross@kernel.org>
+  - Bjorn Andersson <bjorn.andersson@linaro.org>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    const: qcom,geni-i2c
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: se
+
+  clock-frequency:
+    default: 100000
+
+  dmas:
+    maxItems: 2
+
+  dma-names:
+    items:
+      - const: tx
+      - const: rx
+
+  interconnects:
+    maxItems: 3
+
+  interconnect-names:
+    items:
+      - const: qup-core
+      - const: qup-config
+      - const: qup-memory
+
+  interrupts:
+    maxItems: 1
+
+  pinctrl-0: true
+  pinctrl-1: true
+
+  pinctrl-names:
+    minItems: 1
+    items:
+      - const: default
+      - const: sleep
+
+  power-domains:
+    maxItems: 1
+
+  reg:
+    maxItems: 1
+
+  required-opps:
+    maxItems: 1
+
+required:
+  - compatible
+  - interrupts
+  - clocks
+  - clock-names
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/qcom,gcc-sc7180.h>
+    #include <dt-bindings/interconnect/qcom,sc7180.h>
+    #include <dt-bindings/power/qcom-rpmpd.h>
+
+    i2c@88000 {
+        compatible = "qcom,geni-i2c";
+        reg = <0x00880000 0x4000>;
+        clock-names = "se";
+        clocks = <&gcc GCC_QUPV3_WRAP0_S0_CLK>;
+        pinctrl-names = "default";
+        pinctrl-0 = <&qup_i2c0_default>;
+        interrupts = <GIC_SPI 601 IRQ_TYPE_LEVEL_HIGH>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        interconnects = <&qup_virt MASTER_QUP_CORE_0 0 &qup_virt SLAVE_QUP_CORE_0 0>,
+                        <&gem_noc MASTER_APPSS_PROC 0 &config_noc SLAVE_QUP_0 0>,
+                        <&aggre1_noc MASTER_QUP_0 0 &mc_virt SLAVE_EBI1 0>;
+        interconnect-names = "qup-core", "qup-config", "qup-memory";
+        power-domains = <&rpmhpd SC7180_CX>;
+        required-opps = <&rpmhpd_opp_low_svs>;
+    };
+...

bindings/i2c/qcom,i2c-qup.yaml

@@ -0,0 +1,89 @@
+# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/qcom,i2c-qup.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Universal Peripheral (QUP) I2C controller
+
+maintainers:
+  - Andy Gross <agross@kernel.org>
+  - Bjorn Andersson <bjorn.andersson@linaro.org>
+  - Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    enum:
+      - qcom,i2c-qup-v1.1.1     # for 8660, 8960 and 8064
+      - qcom,i2c-qup-v2.1.1     # for 8974 v1
+      - qcom,i2c-qup-v2.2.1     # for 8974 v2 and later
+
+  clocks:
+    maxItems: 2
+
+  clock-names:
+    items:
+      - const: core
+      - const: iface
+
+  clock-frequency:
+    default: 100000
+
+  dmas:
+    maxItems: 2
+
+  dma-names:
+    items:
+      - const: tx
+      - const: rx
+
+  interrupts:
+    maxItems: 1
+
+  pinctrl-0: true
+  pinctrl-1: true
+
+  pinctrl-names:
+    minItems: 1
+    items:
+      - const: default
+      - const: sleep
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - clock-names
+  - clocks
+  - interrupts
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,gcc-msm8998.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    i2c@c175000 {
+        compatible = "qcom,i2c-qup-v2.2.1";
+        reg = <0x0c175000 0x600>;
+        interrupts = <GIC_SPI 95 IRQ_TYPE_LEVEL_HIGH>;
+
+        clocks = <&gcc GCC_BLSP1_QUP1_I2C_APPS_CLK>,
+                 <&gcc GCC_BLSP1_AHB_CLK>;
+        clock-names = "core", "iface";
+        dmas = <&blsp1_dma 6>, <&blsp1_dma 7>;
+        dma-names = "tx", "rx";
+        pinctrl-names = "default", "sleep";
+        pinctrl-0 = <&blsp1_i2c1_default>;
+        pinctrl-1 = <&blsp1_i2c1_sleep>;
+        clock-frequency = <400000>;
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+    };

bindings/i2c/renesas,iic-emev2.yaml

@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/renesas,iic-emev2.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas EMMA Mobile EV2 IIC Interface
+
+maintainers:
+  - Wolfram Sang <wsa+renesas@sang-engineering.com>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    const: renesas,iic-emev2
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: sclk
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - '#address-cells'
+  - '#size-cells'
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    iic0: i2c@e0070000 {
+            #address-cells = <1>;
+            #size-cells = <0>;
+            compatible = "renesas,iic-emev2";
+            reg = <0xe0070000 0x28>;
+            interrupts = <GIC_SPI 32 IRQ_TYPE_EDGE_RISING>;
+            clocks = <&iic0_sclk>;
+            clock-names = "sclk";
+    };

bindings/i2c/renesas,rcar-i2c.yaml

@@ -0,0 +1,165 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/renesas,rcar-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas R-Car I2C Controller
+
+maintainers:
+  - Wolfram Sang <wsa+renesas@sang-engineering.com>
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - renesas,i2c-r8a7778      # R-Car M1A
+              - renesas,i2c-r8a7779      # R-Car H1
+          - const: renesas,rcar-gen1-i2c # R-Car Gen1
+
+      - items:
+          - enum:
+              - renesas,i2c-r8a7742      # RZ/G1H
+              - renesas,i2c-r8a7743      # RZ/G1M
+              - renesas,i2c-r8a7744      # RZ/G1N
+              - renesas,i2c-r8a7745      # RZ/G1E
+              - renesas,i2c-r8a77470     # RZ/G1C
+              - renesas,i2c-r8a7790      # R-Car H2
+              - renesas,i2c-r8a7791      # R-Car M2-W
+              - renesas,i2c-r8a7792      # R-Car V2H
+              - renesas,i2c-r8a7793      # R-Car M2-N
+              - renesas,i2c-r8a7794      # R-Car E2
+          - const: renesas,rcar-gen2-i2c # R-Car Gen2 and RZ/G1
+
+      - items:
+          - enum:
+              - renesas,i2c-r8a774a1     # RZ/G2M
+              - renesas,i2c-r8a774b1     # RZ/G2N
+              - renesas,i2c-r8a774c0     # RZ/G2E
+              - renesas,i2c-r8a774e1     # RZ/G2H
+              - renesas,i2c-r8a7795      # R-Car H3
+              - renesas,i2c-r8a7796      # R-Car M3-W
+              - renesas,i2c-r8a77961     # R-Car M3-W+
+              - renesas,i2c-r8a77965     # R-Car M3-N
+              - renesas,i2c-r8a77970     # R-Car V3M
+              - renesas,i2c-r8a77980     # R-Car V3H
+              - renesas,i2c-r8a77990     # R-Car E3
+              - renesas,i2c-r8a77995     # R-Car D3
+          - const: renesas,rcar-gen3-i2c # R-Car Gen3 and RZ/G2
+
+      - items:
+          - enum:
+              - renesas,i2c-r8a779a0     # R-Car V3U
+              - renesas,i2c-r8a779f0     # R-Car S4-8
+              - renesas,i2c-r8a779g0     # R-Car V4H
+          - const: renesas,rcar-gen4-i2c # R-Car Gen4
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clock-frequency:
+    description:
+      Desired I2C bus clock frequency in Hz. The absence of this property
+      indicates the default frequency 100 kHz.
+
+  clocks:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  dmas:
+    minItems: 2
+    maxItems: 4
+    description:
+      Must contain a list of pairs of references to DMA specifiers, one for
+      transmission, and one for reception.
+
+  dma-names:
+    minItems: 2
+    maxItems: 4
+    items:
+      enum:
+        - tx
+        - rx
+
+  i2c-scl-falling-time-ns:
+    default: 35
+    description:
+      Number of nanoseconds the SCL signal takes to fall; t(f) in the I2C
+      specification.
+
+  i2c-scl-internal-delay-ns:
+    default: 50
+    description:
+      Number of nanoseconds the IP core additionally needs to setup SCL.
+
+  i2c-scl-rising-time-ns:
+    default: 200
+    description:
+      Number of nanoseconds the SCL signal takes to rise; t(r) in the I2C
+      specification.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - power-domains
+  - '#address-cells'
+  - '#size-cells'
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - renesas,rcar-gen1-i2c
+              - renesas,rcar-gen2-i2c
+    then:
+      properties:
+        dmas: false
+        dma-names: false
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - renesas,rcar-gen2-i2c
+              - renesas,rcar-gen3-i2c
+              - renesas,rcar-gen4-i2c
+    then:
+      required:
+        - resets
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/r8a7791-cpg-mssr.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/power/r8a7791-sysc.h>
+
+    i2c0: i2c@e6508000 {
+            #address-cells = <1>;
+            #size-cells = <0>;
+            compatible = "renesas,i2c-r8a7791", "renesas,rcar-gen2-i2c";
+            reg = <0xe6508000 0x40>;
+            interrupts = <GIC_SPI 287 IRQ_TYPE_LEVEL_HIGH>;
+            clock-frequency = <400000>;
+            clocks = <&cpg CPG_MOD 931>;
+            power-domains = <&sysc R8A7791_PD_ALWAYS_ON>;
+            resets = <&cpg 931>;
+            i2c-scl-internal-delay-ns = <6>;
+    };

bindings/i2c/renesas,riic.yaml

@@ -0,0 +1,114 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/renesas,riic.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas RZ/A and RZ/G2L I2C Bus Interface (RIIC)
+
+maintainers:
+  - Chris Brandt <chris.brandt@renesas.com>
+  - Wolfram Sang <wsa+renesas@sang-engineering.com>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - renesas,riic-r7s72100   # RZ/A1H
+          - renesas,riic-r7s9210    # RZ/A2M
+          - renesas,riic-r9a07g043  # RZ/G2UL
+          - renesas,riic-r9a07g044  # RZ/G2{L,LC}
+          - renesas,riic-r9a07g054  # RZ/V2L
+      - const: renesas,riic-rz      # RZ/A or RZ/G2L
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    items:
+      - description: Transmit End Interrupt
+      - description: Receive Data Full Interrupt
+      - description: Transmit Data Empty Interrupt
+      - description: Stop Condition Detection Interrupt
+      - description: Start Condition Detection Interrupt
+      - description: NACK Reception Interrupt
+      - description: Arbitration-Lost Interrupt
+      - description: Timeout Interrupt
+
+  interrupt-names:
+    items:
+      - const: tei
+      - const: ri
+      - const: ti
+      - const: spi
+      - const: sti
+      - const: naki
+      - const: ali
+      - const: tmoi
+
+  clock-frequency:
+    description:
+      Desired I2C bus clock frequency in Hz. The absence of this property
+      indicates the default frequency 100 kHz.
+
+  clocks:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - interrupt-names
+  - clocks
+  - clock-frequency
+  - power-domains
+  - '#address-cells'
+  - '#size-cells'
+
+if:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - renesas,riic-r9a07g043
+          - renesas,riic-r9a07g044
+          - renesas,riic-r9a07g054
+then:
+  required:
+    - resets
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/r7s72100-clock.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    i2c0: i2c@fcfee000 {
+            compatible = "renesas,riic-r7s72100", "renesas,riic-rz";
+            reg = <0xfcfee000 0x44>;
+            interrupts = <GIC_SPI 157 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 158 IRQ_TYPE_EDGE_RISING>,
+                         <GIC_SPI 159 IRQ_TYPE_EDGE_RISING>,
+                         <GIC_SPI 160 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 161 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 162 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 163 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 164 IRQ_TYPE_LEVEL_HIGH>;
+            interrupt-names = "tei", "ri", "ti", "spi", "sti", "naki", "ali",
+                              "tmoi";
+            clocks = <&mstp9_clks R7S72100_CLK_I2C0>;
+            clock-frequency = <100000>;
+            power-domains = <&cpg_clocks>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+    };

bindings/i2c/renesas,rmobile-iic.yaml

@@ -0,0 +1,149 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/renesas,rmobile-iic.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas R-Mobile I2C Bus Interface (IIC)
+
+maintainers:
+  - Wolfram Sang <wsa+renesas@sang-engineering.com>
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - renesas,iic-r8a73a4      # R-Mobile APE6
+              - renesas,iic-r8a7740      # R-Mobile A1
+              - renesas,iic-sh73a0       # SH-Mobile AG5
+          - const: renesas,rmobile-iic   # Generic
+
+      - items:
+          - enum:
+              - renesas,iic-r8a7742      # RZ/G1H
+              - renesas,iic-r8a7743      # RZ/G1M
+              - renesas,iic-r8a7744      # RZ/G1N
+              - renesas,iic-r8a7745      # RZ/G1E
+              - renesas,iic-r8a7790      # R-Car H2
+              - renesas,iic-r8a7791      # R-Car M2-W
+              - renesas,iic-r8a7792      # R-Car V2H
+              - renesas,iic-r8a7793      # R-Car M2-N
+              - renesas,iic-r8a7794      # R-Car E2
+          - const: renesas,rcar-gen2-iic # R-Car Gen2 and RZ/G1
+          - const: renesas,rmobile-iic   # Generic
+
+      - items:
+          - enum:
+              - renesas,iic-r8a774a1     # RZ/G2M
+              - renesas,iic-r8a774b1     # RZ/G2N
+              - renesas,iic-r8a774c0     # RZ/G2E
+              - renesas,iic-r8a774e1     # RZ/G2H
+              - renesas,iic-r8a7795      # R-Car H3
+              - renesas,iic-r8a7796      # R-Car M3-W
+              - renesas,iic-r8a77961     # R-Car M3-W+
+              - renesas,iic-r8a77965     # R-Car M3-N
+              - renesas,iic-r8a77990     # R-Car E3
+          - const: renesas,rcar-gen3-iic # R-Car Gen3 and RZ/G2
+          - const: renesas,rmobile-iic   # Generic
+
+  reg:
+    maxItems: 1
+
+  interrupts: true
+
+  clock-frequency:
+    description:
+      Desired I2C bus clock frequency in Hz. The absence of this property
+      indicates the default frequency 100 kHz.
+
+  clocks:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  dmas:
+    minItems: 2
+    maxItems: 4
+    description:
+      Must contain a list of pairs of references to DMA specifiers, one for
+      transmission, and one for reception.
+
+  dma-names:
+    minItems: 2
+    maxItems: 4
+    items:
+      enum:
+        - tx
+        - rx
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - power-domains
+  - '#address-cells'
+  - '#size-cells'
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - renesas,iic-r8a7740
+              - renesas,iic-sh73a0
+    then:
+      properties:
+        interrupts:
+          items:
+            - description: Arbitration Lost Interrupt (ALI)
+            - description: Non-acknowledge Detection Interrupt (TACKI)
+            - description: Wait Interrupt (WAITI)
+            - description: Data Transmit Enable interrupt (DTEI)
+    else:
+      properties:
+        interrupts:
+          items:
+            - description: Single combined interrupt
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - renesas,rcar-gen2-iic
+              - renesas,rcar-gen3-iic
+    then:
+      required:
+        - resets
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/r8a7790-cpg-mssr.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/power/r8a7790-sysc.h>
+
+    iic0: i2c@e6500000 {
+            compatible = "renesas,iic-r8a7790", "renesas,rcar-gen2-iic",
+                         "renesas,rmobile-iic";
+            reg = <0xe6500000 0x425>;
+            interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+            clocks = <&cpg CPG_MOD 318>;
+            clock-frequency = <400000>;
+            dmas = <&dmac0 0x61>, <&dmac0 0x62>, <&dmac1 0x61>, <&dmac1 0x62>;
+            dma-names = "tx", "rx", "tx", "rx";
+            power-domains = <&sysc R8A7790_PD_ALWAYS_ON>;
+            resets = <&cpg 318>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+    };

bindings/i2c/renesas,rzv2m.yaml

@@ -0,0 +1,80 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/renesas,rzv2m.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas RZ/V2M I2C Bus Interface
+
+maintainers:
+  - Phil Edworthy <phil.edworthy@renesas.com>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - renesas,i2c-r9a09g011  # RZ/V2M
+      - const: renesas,rzv2m-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    items:
+      - description: Data transmission/reception interrupt
+      - description: Status interrupt
+
+  interrupt-names:
+    items:
+      - const: tia
+      - const: tis
+
+  clock-frequency:
+    default: 100000
+    enum: [ 100000, 400000 ]
+    description:
+      Desired I2C bus clock frequency in Hz.
+
+  clocks:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - interrupt-names
+  - clocks
+  - power-domains
+  - resets
+  - '#address-cells'
+  - '#size-cells'
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/r9a09g011-cpg.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    i2c0: i2c@a4030000 {
+        compatible = "renesas,i2c-r9a09g011", "renesas,rzv2m-i2c";
+        reg = <0xa4030000 0x80>;
+        interrupts = <GIC_SPI 232 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 236 IRQ_TYPE_EDGE_RISING>;
+        interrupt-names = "tia", "tis";
+        clocks = <&cpg CPG_MOD R9A09G011_IIC_PCLK0>;
+        resets = <&cpg R9A09G011_IIC_GPA_PRESETN>;
+        power-domains = <&cpg>;
+        clock-frequency = <100000>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+    };

bindings/i2c/samsung,s3c2410-i2c.yaml

@@ -0,0 +1,164 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/samsung,s3c2410-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung S3C/S5P/Exynos SoC I2C Controller
+
+maintainers:
+  - Krzysztof Kozlowski <krzk@kernel.org>
+
+properties:
+  compatible:
+    enum:
+      - samsung,s3c2410-i2c
+      - samsung,s3c2440-i2c
+        # For s3c2440-like I2C used inside HDMIPHY block found on several SoCs:
+      - samsung,s3c2440-hdmiphy-i2c
+        # For s3c2440-like I2C used as a host to SATA PHY controller on an
+        # internal bus:
+      - samsung,exynos5-sata-phy-i2c
+
+  '#address-cells':
+    const: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: i2c
+
+  gpios:
+    description: |
+      The order of the GPIOs should be the following:: <SDA, SCL>.  The GPIO
+      specifier depends on the gpio controller. Required in all cases except
+      for "samsung,s3c2440-hdmiphy-i2c" whose input/output lines are
+      permanently wired to the respective client.
+      This property is deprecated. Use "pinctrl-0" and "pinctrl-names" instead.
+    deprecated: yes
+
+  interrupts:
+    maxItems: 1
+
+  reg:
+    maxItems: 1
+
+  samsung,i2c-max-bus-freq:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Desired frequency in Hz of the bus.
+    default: 100000
+
+  samsung,i2c-sda-delay:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Delay (in ns) applied to data line (SDA) edges.
+    default: 0
+
+  samsung,i2c-slave-addr:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Slave address in multi-master environment.
+    default: 0
+
+  samsung,sysreg-phandle:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: Pandle to syscon used to control the system registers.
+
+  '#size-cells':
+    const: 0
+
+required:
+  - compatible
+  - reg
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - samsung,s3c2440-hdmiphy-i2c
+              - samsung,exynos5-sata-phy-i2c
+    then:
+      properties:
+        gpios: false
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - samsung,s3c2410-i2c
+              - samsung,s3c2440-i2c
+              - samsung,s3c2440-hdmiphy-i2c
+    then:
+      required:
+        - interrupts
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/exynos5250.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    i2c@12c60000 {
+        compatible = "samsung,s3c2440-i2c";
+        reg = <0x12C60000 0x100>;
+        interrupts = <GIC_SPI 56 IRQ_TYPE_LEVEL_HIGH>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        clocks = <&clock CLK_I2C0>;
+        clock-names = "i2c";
+        pinctrl-names = "default";
+        pinctrl-0 = <&i2c0_bus>;
+
+        samsung,sysreg-phandle = <&sysreg_system_controller>;
+        samsung,i2c-sda-delay = <100>;
+        samsung,i2c-max-bus-freq = <20000>;
+        samsung,i2c-slave-addr = <0x66>;
+
+        eeprom@50 {
+            compatible = "samsung,s524ad0xd1", "atmel,24c128";
+            reg = <0x50>;
+        };
+    };
+
+    i2c@12ce0000 {
+        compatible = "samsung,s3c2440-hdmiphy-i2c";
+        reg = <0x12CE0000 0x1000>;
+        interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        clocks = <&clock CLK_I2C_HDMI>;
+        clock-names = "i2c";
+
+        samsung,i2c-sda-delay = <100>;
+        samsung,i2c-max-bus-freq = <66000>;
+
+        phy-i2c@38 {
+            compatible = "samsung,exynos4212-hdmiphy";
+            reg = <0x38>;
+        };
+    };
+
+    i2c@121d0000 {
+        compatible = "samsung,exynos5-sata-phy-i2c";
+        reg = <0x121D0000 0x100>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        clocks = <&clock CLK_SATA_PHYI2C>;
+        clock-names = "i2c";
+
+        samsung,i2c-sda-delay = <100>;
+        samsung,i2c-max-bus-freq = <40000>;
+
+        phy-i2c@38 {
+            compatible = "samsung,exynos-sataphy-i2c";
+            reg = <0x38>;
+        };
+    };

bindings/i2c/snps,designware-i2c.yaml

@@ -0,0 +1,145 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/snps,designware-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Synopsys DesignWare APB I2C Controller
+
+maintainers:
+  - Jarkko Nikula <jarkko.nikula@linux.intel.com>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+  - if:
+      properties:
+        compatible:
+          not:
+            contains:
+              const: mscc,ocelot-i2c
+    then:
+      properties:
+        reg:
+          maxItems: 1
+
+properties:
+  compatible:
+    oneOf:
+      - description: Generic Synopsys DesignWare I2C controller
+        const: snps,designware-i2c
+      - description: Microsemi Ocelot SoCs I2C controller
+        items:
+          - const: mscc,ocelot-i2c
+          - const: snps,designware-i2c
+      - description: Baikal-T1 SoC System I2C controller
+        const: baikal,bt1-sys-i2c
+
+  reg:
+    minItems: 1
+    items:
+      - description: DW APB I2C controller memory mapped registers
+      - description: |
+          ICPU_CFG:TWI_DELAY registers to setup the SDA hold time.
+          This registers are specific to the Ocelot I2C-controller.
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+    items:
+      - description: I2C controller reference clock source
+      - description: APB interface clock source
+
+  clock-names:
+    minItems: 1
+    items:
+      - const: ref
+      - const: pclk
+
+  resets:
+    maxItems: 1
+
+  clock-frequency:
+    description: Desired I2C bus clock frequency in Hz
+    enum: [100000, 400000, 1000000, 3400000]
+    default: 400000
+
+  i2c-sda-hold-time-ns:
+    description: |
+      The property should contain the SDA hold time in nanoseconds. This option
+      is only supported in hardware blocks version 1.11a or newer or on
+      Microsemi SoCs.
+
+  i2c-scl-falling-time-ns:
+    description: |
+      The property should contain the SCL falling time in nanoseconds.
+      This value is used to compute the tLOW period.
+    default: 300
+
+  i2c-sda-falling-time-ns:
+    description: |
+      The property should contain the SDA falling time in nanoseconds.
+      This value is used to compute the tHIGH period.
+    default: 300
+
+  dmas:
+    items:
+      - description: TX DMA Channel
+      - description: RX DMA Channel
+
+  dma-names:
+    items:
+      - const: tx
+      - const: rx
+
+unevaluatedProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+examples:
+  - |
+    i2c@f0000 {
+      compatible = "snps,designware-i2c";
+      reg = <0xf0000 0x1000>;
+      interrupts = <11>;
+      clock-frequency = <400000>;
+    };
+  - |
+    i2c@1120000 {
+      compatible = "snps,designware-i2c";
+      reg = <0x1120000 0x1000>;
+      interrupts = <12 1>;
+      clock-frequency = <400000>;
+      i2c-sda-hold-time-ns = <300>;
+      i2c-sda-falling-time-ns = <300>;
+      i2c-scl-falling-time-ns = <300>;
+    };
+  - |
+    i2c@2000 {
+      compatible = "snps,designware-i2c";
+      reg = <0x2000 0x100>;
+      #address-cells = <1>;
+      #size-cells = <0>;
+      clock-frequency = <400000>;
+      clocks = <&i2cclk>;
+      interrupts = <0>;
+
+      eeprom@64 {
+        compatible = "atmel,24c02";
+        reg = <0x64>;
+      };
+    };
+  - |
+    i2c@100400 {
+      compatible = "mscc,ocelot-i2c", "snps,designware-i2c";
+      reg = <0x100400 0x100>, <0x198 0x8>;
+      pinctrl-0 = <&i2c_pins>;
+      pinctrl-names = "default";
+      interrupts = <8>;
+      clocks = <&ahb_clk>;
+    };
+...

bindings/i2c/socionext,uniphier-fi2c.yaml

@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/socionext,uniphier-fi2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: UniPhier I2C controller (FIFO-builtin)
+
+maintainers:
+  - Masahiro Yamada <yamada.masahiro@socionext.com>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    const: socionext,uniphier-fi2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-frequency:
+    minimum: 100000
+    maximum: 400000
+
+required:
+  - compatible
+  - reg
+  - "#address-cells"
+  - "#size-cells"
+  - interrupts
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c0: i2c@58780000 {
+        compatible = "socionext,uniphier-fi2c";
+        reg = <0x58780000 0x80>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        interrupts = <0 41 4>;
+        clocks = <&i2c_clk>;
+        clock-frequency = <100000>;
+    };

bindings/i2c/socionext,uniphier-i2c.yaml

@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/socionext,uniphier-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: UniPhier I2C controller (FIFO-less)
+
+maintainers:
+  - Masahiro Yamada <yamada.masahiro@socionext.com>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    const: socionext,uniphier-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-frequency:
+    minimum: 100000
+    maximum: 400000
+
+required:
+  - compatible
+  - reg
+  - "#address-cells"
+  - "#size-cells"
+  - interrupts
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c0: i2c@58400000 {
+        compatible = "socionext,uniphier-i2c";
+        reg = <0x58400000 0x40>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        interrupts = <0 41 1>;
+        clocks = <&i2c_clk>;
+        clock-frequency = <100000>;
+    };

bindings/i2c/st,nomadik-i2c.yaml

@@ -0,0 +1,115 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/st,nomadik-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ST Microelectronics Nomadik I2C Bindings
+
+description: The Nomadik I2C host controller began its life in the ST
+  Microelectronics STn8800 SoC, and was then inherited into STn8810 and
+  STn8815. It was part of the prototype STn8500 which then became ST-Ericsson
+  DB8500 after the merge of these two companies wireless divisions.
+
+maintainers:
+  - Linus Walleij <linus.walleij@linaro.org>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+# Need a custom select here or 'arm,primecell' will match on lots of nodes
+select:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - st,nomadik-i2c
+  required:
+    - compatible
+
+properties:
+  compatible:
+    oneOf:
+      # The variant found in STn8815
+      - items:
+          - const: st,nomadik-i2c
+          - const: arm,primecell
+      # The variant found in DB8500
+      - items:
+          - const: stericsson,db8500-i2c
+          - const: st,nomadik-i2c
+          - const: arm,primecell
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 2
+
+  clock-names:
+    oneOf:
+      # Clock name in STn8815
+      - items:
+          - const: mclk
+          - const: apb_pclk
+      # Clock name in DB8500
+      - items:
+          - const: i2cclk
+          - const: apb_pclk
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  clock-frequency:
+    minimum: 1
+    maximum: 400000
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/reset/stericsson,db8500-prcc-reset.h>
+    #include <dt-bindings/arm/ux500_pm_domains.h>
+    i2c@80004000 {
+      compatible = "stericsson,db8500-i2c", "st,nomadik-i2c", "arm,primecell";
+      reg = <0x80004000 0x1000>;
+      interrupts = <GIC_SPI 21 IRQ_TYPE_LEVEL_HIGH>;
+
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      clock-frequency = <400000>;
+      clocks = <&prcc_kclk 3 3>, <&prcc_pclk 3 3>;
+      clock-names = "i2cclk", "apb_pclk";
+      power-domains = <&pm_domains DOMAIN_VAPE>;
+      resets = <&prcc_reset DB8500_PRCC_3 DB8500_PRCC_3_RESET_I2C0>;
+    };
+
+    i2c@101f8000 {
+      compatible = "st,nomadik-i2c", "arm,primecell";
+      reg = <0x101f8000 0x1000>;
+      interrupt-parent = <&vica>;
+      interrupts = <20>;
+      clock-frequency = <100000>;
+      #address-cells = <1>;
+      #size-cells = <0>;
+      clocks = <&i2c0clk>, <&pclki2c0>;
+      clock-names = "mclk", "apb_pclk";
+    };
+
+...

bindings/i2c/st,stm32-i2c.yaml

@@ -0,0 +1,161 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/st,stm32-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: I2C controller embedded in STMicroelectronics STM32 I2C platform
+
+maintainers:
+  - Pierre-Yves MORDRET <pierre-yves.mordret@foss.st.com>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - st,stm32f7-i2c
+              - st,stm32mp13-i2c
+              - st,stm32mp15-i2c
+    then:
+      properties:
+        i2c-scl-rising-time-ns:
+          default: 25
+
+        i2c-scl-falling-time-ns:
+          default: 10
+    else:
+      properties:
+        st,syscfg-fmp: false
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - st,stm32f4-i2c
+    then:
+      properties:
+        clock-frequency:
+          enum: [100000, 400000]
+
+properties:
+  compatible:
+    enum:
+      - st,stm32f4-i2c
+      - st,stm32f7-i2c
+      - st,stm32mp13-i2c
+      - st,stm32mp15-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    items:
+      - description: interrupt ID for I2C event
+      - description: interrupt ID for I2C error
+
+  interrupt-names:
+    items:
+      - const: event
+      - const: error
+
+  resets:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  dmas:
+    items:
+      - description: RX DMA Channel phandle
+      - description: TX DMA Channel phandle
+
+  dma-names:
+    items:
+      - const: rx
+      - const: tx
+
+  clock-frequency:
+    description: Desired I2C bus clock frequency in Hz. If not specified,
+                 the default 100 kHz frequency will be used.
+                 For STM32F7, STM32H7 and STM32MP1 SoCs, if timing parameters
+                 match, the bus clock frequency can be from 1Hz to 1MHz.
+    default: 100000
+    minimum: 1
+    maximum: 1000000
+
+  st,syscfg-fmp:
+    description: Use to set Fast Mode Plus bit within SYSCFG when Fast Mode
+      Plus speed is selected by slave.
+    $ref: "/schemas/types.yaml#/definitions/phandle-array"
+    items:
+      - items:
+          - description: phandle to syscfg
+          - description: register offset within syscfg
+          - description: register bitmask for FMP bit
+
+  wakeup-source: true
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - resets
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/mfd/stm32f7-rcc.h>
+    #include <dt-bindings/clock/stm32fx-clock.h>
+    //Example 1 (with st,stm32f4-i2c compatible)
+      i2c@40005400 {
+          compatible = "st,stm32f4-i2c";
+          #address-cells = <1>;
+          #size-cells = <0>;
+          reg = <0x40005400 0x400>;
+          interrupts = <31>,
+                       <32>;
+          resets = <&rcc 277>;
+          clocks = <&rcc 0 149>;
+      };
+
+  - |
+    #include <dt-bindings/mfd/stm32f7-rcc.h>
+    #include <dt-bindings/clock/stm32fx-clock.h>
+    //Example 2 (with st,stm32f7-i2c compatible)
+      i2c@40005800 {
+          compatible = "st,stm32f7-i2c";
+          #address-cells = <1>;
+          #size-cells = <0>;
+          reg = <0x40005800 0x400>;
+          interrupts = <31>,
+                       <32>;
+          resets = <&rcc STM32F7_APB1_RESET(I2C1)>;
+          clocks = <&rcc 1 CLK_I2C1>;
+      };
+
+  - |
+    #include <dt-bindings/mfd/stm32f7-rcc.h>
+    #include <dt-bindings/clock/stm32fx-clock.h>
+    //Example 3 (with st,stm32mp15-i2c compatible on stm32mp)
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/stm32mp1-clks.h>
+    #include <dt-bindings/reset/stm32mp1-resets.h>
+      i2c@40013000 {
+          compatible = "st,stm32mp15-i2c";
+          #address-cells = <1>;
+          #size-cells = <0>;
+          reg = <0x40013000 0x400>;
+          interrupts = <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>,
+                       <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
+          clocks = <&rcc I2C2_K>;
+          resets = <&rcc I2C2_R>;
+          i2c-scl-rising-time-ns = <185>;
+          i2c-scl-falling-time-ns = <20>;
+          st,syscfg-fmp = <&syscfg 0x4 0x2>;
+      };

bindings/i2c/ti,omap4-i2c.yaml

@@ -0,0 +1,102 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/ti,omap4-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Bindings for I2C controllers on TI's OMAP and K3 SoCs
+
+maintainers:
+  - Vignesh Raghavendra <vigneshr@ti.com>
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - ti,omap2420-i2c
+          - ti,omap2430-i2c
+          - ti,omap3-i2c
+          - ti,omap4-i2c
+      - items:
+          - enum:
+              - ti,am4372-i2c
+              - ti,am64-i2c
+              - ti,am654-i2c
+              - ti,j721e-i2c
+          - const: ti,omap4-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: fck
+
+  clock-frequency: true
+
+  power-domains: true
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+  ti,hwmods:
+    description:
+      Must be "i2c<n>", n being the instance number (1-based).
+      This property is applicable only on legacy platforms mainly omap2/3
+      and ti81xx and should not be used on other platforms.
+    $ref: /schemas/types.yaml#/definitions/string
+    deprecated: true
+
+# subnode's properties
+patternProperties:
+  "@[0-9a-f]+$":
+    type: object
+    description:
+      Flash device uses the below defined properties in the subnode.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+if:
+  properties:
+    compatible:
+      enum:
+        - ti,omap2420-i2c
+        - ti,omap2430-i2c
+        - ti,omap3-i2c
+        - ti,omap4-i2c
+
+then:
+  properties:
+    ti,hwmods:
+      items:
+        - pattern: "^i2c([1-9])$"
+
+else:
+  properties:
+    ti,hwmods: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    main_i2c0: i2c@2000000 {
+            compatible = "ti,j721e-i2c", "ti,omap4-i2c";
+            reg = <0x2000000 0x100>;
+            interrupts = <GIC_SPI 200 IRQ_TYPE_LEVEL_HIGH>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+         };

bindings/i2c/xlnx,xps-iic-2.00.a.yaml

@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/i2c/xlnx,xps-iic-2.00.a.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Xilinx IIC controller
+
+maintainers:
+  - info@mocean-labs.com
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    const: xlnx,xps-iic-2.00.a
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+
+  clock-name:
+    const: pclk
+    description: |
+      Input clock name.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    axi_iic_0: i2c@40800000 {
+      compatible = "xlnx,xps-iic-2.00.a";
+      clocks = <&clkc 15>;
+      interrupts = < 1 2 >;
+      reg = < 0x40800000 0x10000 >;
+
+      #size-cells = <0>;
+      #address-cells = <1>;
+    };