dt-bindings: power: Add bindings for schgm-flash driver

Add devicetree bindings for the schgm-flash driver.

Change-Id: Id9da37b6dd5a33f1d6028007237d2e4fc763534c
Signed-off-by: Varshitha H N <quic_vhn@quicinc.com>

bindings/power/supply/qcom,schgm-flash.yaml

@@ -0,0 +1,96 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/power/supply/qcom,schgm-flash.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Technologies, Inc. schgm_flash driver
+
+maintainers:
+  - Rakesh Kota <quic_kotarake@quicinc.com>
+
+description: |
+  Add support for SCHGM_FLASH module under charger.
+  SCHGM_FLASH module handles flash failure, de-rating and
+  allows configuration for different flash features.
+
+properties:
+  compatible:
+    const: qcom,schgm-flash
+
+  reg:
+    description: |
+      Address and size of the peripheral's register block.
+
+  interrupts:
+    description: |
+      Peripheral interrupt specifier.
+
+  interrupt-names:
+    description: |
+      Interrupt names.  This list must match up 1-to-1 with the
+      interrupts specified in the 'interrupts' property.
+
+  qcom,flash-derating-soc:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      SOC threshold in percentage below which hardware will start
+      derating flash. This is only applicable to certain PMICs like
+      PMI632 which has SCHGM_FLASH peripheral.
+
+  qcom,flash-disable-soc:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      SOC threshold in percentage below which hardware will disable
+      flash. This is only applicable to certain PMICs like PMI632
+      which has SCHGM_FLASH peripheral.
+
+  qcom,headroom-mode:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      Specifies flash hardware headroom management policy.
+      possible values are
+      0 - Fixed mode, constant 5V at flash input.
+      1 - Adaptive mode allows charger output voltage to be
+          dynamically controlled by the flash module based on the
+          required flash headroom.
+      This is only applicable to certain PMICs like PMI632 which
+      has SCHGM_FLASH peripheral.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - interrupt-names
+
+allOf:
+  - $ref: power-supply.yaml#
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    qcom,schgm-flash@a600 {
+            compatible = "qcom,schgm-flash";
+            reg = <0xa600 0x100>;
+            interrupts = <0x2 0xa6 0x0 IRQ_TYPE_NONE>,
+                         <0x2 0xa6 0x1 IRQ_TYPE_NONE>,
+                         <0x2 0xa6 0x2 IRQ_TYPE_NONE>,
+                         <0x2 0xa6 0x3 IRQ_TYPE_NONE>,
+                         <0x2 0xa6 0x4 IRQ_TYPE_NONE>,
+                         <0x2 0xa6 0x5 IRQ_TYPE_NONE>,
+                         <0x2 0xa6 0x6 IRQ_TYPE_NONE>,
+                         <0x2 0xa6 0x7 IRQ_TYPE_NONE>;
+
+            interrupt-names =	"flash-en",
+                                "torch-req",
+                                "flash-state-change",
+                                "vout-up",
+                                "vout-down",
+                                "ilim1-s1",
+                                "ilim2-s2",
+                                "vreg-ok";
+    };
+...