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/riscv/canaan.yaml

@@ -0,0 +1,47 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/riscv/canaan.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Canaan SoC-based boards
+
+maintainers:
+  - Damien Le Moal <damien.lemoal@wdc.com>
+
+description:
+  Canaan Kendryte K210 SoC-based boards
+
+properties:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+      - items:
+          - const: sipeed,maix-bit
+          - const: sipeed,maix-bitm
+          - const: canaan,kendryte-k210
+
+      - items:
+          - const: sipeed,maix-go
+          - const: canaan,kendryte-k210
+
+      - items:
+          - const: sipeed,maix-dock-m1
+          - const: sipeed,maix-dock-m1w
+          - const: canaan,kendryte-k210
+
+      - items:
+          - const: sipeed,maixduino
+          - const: canaan,kendryte-k210
+
+      - items:
+          - const: canaan,kendryte-kd233
+          - const: canaan,kendryte-k210
+
+      - items:
+          - const: canaan,kendryte-k210
+
+additionalProperties: true
+
+...

bindings/riscv/cpus.yaml

@@ -0,0 +1,189 @@
+# SPDX-License-Identifier: (GPL-2.0 OR MIT)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/riscv/cpus.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: RISC-V bindings for 'cpus' DT nodes
+
+maintainers:
+  - Paul Walmsley <paul.walmsley@sifive.com>
+  - Palmer Dabbelt <palmer@sifive.com>
+  - Conor Dooley <conor@kernel.org>
+
+description: |
+  This document uses some terminology common to the RISC-V community
+  that is not widely used, the definitions of which are listed here:
+
+  hart: A hardware execution context, which contains all the state
+  mandated by the RISC-V ISA: a PC and some registers.  This
+  terminology is designed to disambiguate software's view of execution
+  contexts from any particular microarchitectural implementation
+  strategy.  For example, an Intel laptop containing one socket with
+  two cores, each of which has two hyperthreads, could be described as
+  having four harts.
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - andestech,ax45mp
+              - canaan,k210
+              - sifive,bullet0
+              - sifive,e5
+              - sifive,e7
+              - sifive,e71
+              - sifive,rocket0
+              - sifive,u5
+              - sifive,u54
+              - sifive,u7
+              - sifive,u74
+              - sifive,u74-mc
+              - thead,c906
+              - thead,c910
+          - const: riscv
+      - items:
+          - enum:
+              - sifive,e51
+              - sifive,u54-mc
+          - const: sifive,rocket0
+          - const: riscv
+      - const: riscv    # Simulator only
+    description:
+      Identifies that the hart uses the RISC-V instruction set
+      and identifies the type of the hart.
+
+  mmu-type:
+    description:
+      Identifies the MMU address translation mode used on this
+      hart.  These values originate from the RISC-V Privileged
+      Specification document, available from
+      https://riscv.org/specifications/
+    $ref: "/schemas/types.yaml#/definitions/string"
+    enum:
+      - riscv,sv32
+      - riscv,sv39
+      - riscv,sv48
+      - riscv,none
+
+  riscv,cbom-block-size:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      The blocksize in bytes for the Zicbom cache operations.
+
+  riscv,isa:
+    description:
+      Identifies the specific RISC-V instruction set architecture
+      supported by the hart.  These are documented in the RISC-V
+      User-Level ISA document, available from
+      https://riscv.org/specifications/
+
+      While the isa strings in ISA specification are case
+      insensitive, letters in the riscv,isa string must be all
+      lowercase to simplify parsing.
+    $ref: "/schemas/types.yaml#/definitions/string"
+    pattern: ^rv(?:64|32)imaf?d?q?c?b?v?k?h?(?:_[hsxz](?:[a-z])+)*$
+
+  # RISC-V requires 'timebase-frequency' in /cpus, so disallow it here
+  timebase-frequency: false
+
+  interrupt-controller:
+    type: object
+    description: Describes the CPU's local interrupt controller
+
+    properties:
+      '#interrupt-cells':
+        const: 1
+
+      compatible:
+        const: riscv,cpu-intc
+
+      interrupt-controller: true
+
+    required:
+      - '#interrupt-cells'
+      - compatible
+      - interrupt-controller
+
+  cpu-idle-states:
+    $ref: '/schemas/types.yaml#/definitions/phandle-array'
+    items:
+      maxItems: 1
+    description: |
+      List of phandles to idle state nodes supported
+      by this hart (see ./idle-states.yaml).
+
+required:
+  - riscv,isa
+  - interrupt-controller
+
+additionalProperties: true
+
+examples:
+  - |
+    // Example 1: SiFive Freedom U540G Development Kit
+    cpus {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        timebase-frequency = <1000000>;
+        cpu@0 {
+                clock-frequency = <0>;
+                compatible = "sifive,rocket0", "riscv";
+                device_type = "cpu";
+                i-cache-block-size = <64>;
+                i-cache-sets = <128>;
+                i-cache-size = <16384>;
+                reg = <0>;
+                riscv,isa = "rv64imac";
+                cpu_intc0: interrupt-controller {
+                        #interrupt-cells = <1>;
+                        compatible = "riscv,cpu-intc";
+                        interrupt-controller;
+                };
+        };
+        cpu@1 {
+                clock-frequency = <0>;
+                compatible = "sifive,rocket0", "riscv";
+                d-cache-block-size = <64>;
+                d-cache-sets = <64>;
+                d-cache-size = <32768>;
+                d-tlb-sets = <1>;
+                d-tlb-size = <32>;
+                device_type = "cpu";
+                i-cache-block-size = <64>;
+                i-cache-sets = <64>;
+                i-cache-size = <32768>;
+                i-tlb-sets = <1>;
+                i-tlb-size = <32>;
+                mmu-type = "riscv,sv39";
+                reg = <1>;
+                riscv,isa = "rv64imafdc";
+                tlb-split;
+                cpu_intc1: interrupt-controller {
+                        #interrupt-cells = <1>;
+                        compatible = "riscv,cpu-intc";
+                        interrupt-controller;
+                };
+        };
+    };
+
+  - |
+    // Example 2: Spike ISA Simulator with 1 Hart
+    cpus {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        cpu@0 {
+                device_type = "cpu";
+                reg = <0>;
+                compatible = "riscv";
+                riscv,isa = "rv64imafdc";
+                mmu-type = "riscv,sv48";
+                interrupt-controller {
+                        #interrupt-cells = <1>;
+                        interrupt-controller;
+                        compatible = "riscv,cpu-intc";
+                };
+        };
+    };
+...

bindings/riscv/microchip.yaml

@@ -0,0 +1,37 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/riscv/microchip.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip PolarFire SoC-based boards
+
+maintainers:
+  - Conor Dooley <conor.dooley@microchip.com>
+  - Daire McNamara <daire.mcnamara@microchip.com>
+
+description:
+  Microchip PolarFire SoC-based boards
+
+properties:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - microchip,mpfs-icicle-reference-rtlv2203
+              - microchip,mpfs-icicle-reference-rtlv2210
+          - const: microchip,mpfs-icicle-kit
+          - const: microchip,mpfs
+
+      - items:
+          - enum:
+              - aries,m100pfsevp
+              - microchip,mpfs-sev-kit
+              - sundance,polarberry
+          - const: microchip,mpfs
+
+additionalProperties: true
+
+...

bindings/riscv/sifive,ccache0.yaml

@@ -0,0 +1,164 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright (C) 2020 SiFive, Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/riscv/sifive,ccache0.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SiFive Composable Cache Controller
+
+maintainers:
+  - Sagar Kadam <sagar.kadam@sifive.com>
+  - Paul Walmsley  <paul.walmsley@sifive.com>
+
+description:
+  The SiFive Composable Cache Controller is used to provide access to fast copies
+  of memory for masters in a Core Complex. The Composable Cache Controller also
+  acts as directory-based coherency manager.
+  All the properties in ePAPR/DeviceTree specification applies for this platform.
+
+select:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - sifive,ccache0
+          - sifive,fu540-c000-ccache
+          - sifive,fu740-c000-ccache
+
+  required:
+    - compatible
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - sifive,ccache0
+              - sifive,fu540-c000-ccache
+              - sifive,fu740-c000-ccache
+          - const: cache
+      - items:
+          - const: microchip,mpfs-ccache
+          - const: sifive,fu540-c000-ccache
+          - const: cache
+
+  cache-block-size:
+    const: 64
+
+  cache-level:
+    enum: [2, 3]
+
+  cache-sets:
+    enum: [1024, 2048]
+
+  cache-size:
+    const: 2097152
+
+  cache-unified: true
+
+  interrupts:
+    minItems: 3
+    items:
+      - description: DirError interrupt
+      - description: DataError interrupt
+      - description: DataFail interrupt
+      - description: DirFail interrupt
+
+  reg:
+    maxItems: 1
+
+  next-level-cache: true
+
+  memory-region:
+    maxItems: 1
+    description: |
+      The reference to the reserved-memory for the L2 Loosely Integrated Memory region.
+      The reserved memory node should be defined as per the bindings in reserved-memory.txt.
+
+allOf:
+  - $ref: /schemas/cache-controller.yaml#
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - sifive,fu740-c000-ccache
+              - microchip,mpfs-ccache
+
+    then:
+      properties:
+        interrupts:
+          description: |
+            Must contain entries for DirError, DataError, DataFail, DirFail signals.
+          minItems: 4
+
+    else:
+      properties:
+        interrupts:
+          description: |
+            Must contain entries for DirError, DataError and DataFail signals.
+          maxItems: 3
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: sifive,fu740-c000-ccache
+
+    then:
+      properties:
+        cache-sets:
+          const: 2048
+
+    else:
+      properties:
+        cache-sets:
+          const: 1024
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: sifive,ccache0
+
+    then:
+      properties:
+        cache-level:
+          enum: [2, 3]
+
+    else:
+      properties:
+        cache-level:
+          const: 2
+
+additionalProperties: false
+
+required:
+  - compatible
+  - cache-block-size
+  - cache-level
+  - cache-sets
+  - cache-size
+  - cache-unified
+  - interrupts
+  - reg
+
+examples:
+  - |
+    cache-controller@2010000 {
+        compatible = "sifive,fu540-c000-ccache", "cache";
+        cache-block-size = <64>;
+        cache-level = <2>;
+        cache-sets = <1024>;
+        cache-size = <2097152>;
+        cache-unified;
+        reg = <0x2010000 0x1000>;
+        interrupt-parent = <&plic0>;
+        interrupts = <1>,
+                     <2>,
+                     <3>;
+        next-level-cache = <&L25>;
+        memory-region = <&l2_lim>;
+    };

bindings/riscv/sifive.yaml

@@ -0,0 +1,35 @@
+# SPDX-License-Identifier: (GPL-2.0 OR MIT)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/riscv/sifive.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SiFive SoC-based boards
+
+maintainers:
+  - Paul Walmsley <paul.walmsley@sifive.com>
+  - Palmer Dabbelt <palmer@sifive.com>
+
+description:
+  SiFive SoC-based boards
+
+properties:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - sifive,hifive-unleashed-a00
+          - const: sifive,fu540-c000
+          - const: sifive,fu540
+
+      - items:
+          - enum:
+              - sifive,hifive-unmatched-a00
+          - const: sifive,fu740-c000
+          - const: sifive,fu740
+
+additionalProperties: true
+
+...

bindings/riscv/starfive.yaml

@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/riscv/starfive.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: StarFive SoC-based boards
+
+maintainers:
+  - Michael Zhu <michael.zhu@starfivetech.com>
+  - Drew Fustini <drew@beagleboard.org>
+
+description:
+  StarFive SoC-based boards
+
+properties:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - beagle,beaglev-starlight-jh7100-r0
+              - starfive,visionfive-v1
+          - const: starfive,jh7100
+
+additionalProperties: true
+
+...