dt-bindings: leds: Add bindings for MT6360 LED

Add bindings document for LED support on MT6360 PMIC
Signed-off-by: Gene Chen <gene_chen@richtek.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Pavel Machek <pavel@ucw.cz>

Documentation/devicetree/bindings/leds/leds-mt6360.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/leds-mt6360.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: LED driver for MT6360 PMIC from MediaTek Integrated.
+
+maintainers:
+  - Gene Chen <gene_chen@richtek.com>
+
+description: |
+  This module is part of the MT6360 MFD device.
+  see Documentation/devicetree/bindings/mfd/mt6360.yaml
+  Add MT6360 LED driver include 2-channel Flash LED with torch/strobe mode,
+  and 4-channel RGB LED support Register/Flash/Breath Mode
+
+properties:
+  compatible:
+    const: mediatek,mt6360-led
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  "^(multi-)?led@[0-5]$":
+    type: object
+    $ref: common.yaml#
+    description:
+      Properties for a single LED.
+
+    properties:
+      reg:
+        description: Index of the LED.
+        enum:
+          - 0 # LED output ISINK1
+          - 1 # LED output ISINK2
+          - 2 # LED output ISINK3
+          - 3 # LED output ISINKML
+          - 4 # LED output FLASH1
+          - 5 # LED output FLASH2
+
+unevaluatedProperties: false
+
+required:
+  - compatible
+  - "#address-cells"
+  - "#size-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+   #include <dt-bindings/leds/common.h>
+   led-controller {
+     compatible = "mediatek,mt6360-led";
+     #address-cells = <1>;
+     #size-cells = <0>;
+
+     multi-led@0 {
+       reg = <0>;
+       function = LED_FUNCTION_INDICATOR;
+       color = <LED_COLOR_ID_RGB>;
+       led-max-microamp = <24000>;
+       #address-cells = <1>;
+       #size-cells = <0>;
+       led@0 {
+         reg = <0>;
+         color = <LED_COLOR_ID_RED>;
+       };
+       led@1 {
+         reg = <1>;
+         color = <LED_COLOR_ID_GREEN>;
+       };
+       led@2 {
+         reg = <2>;
+         color = <LED_COLOR_ID_BLUE>;
+       };
+     };
+     led@3 {
+       reg = <3>;
+       function = LED_FUNCTION_INDICATOR;
+       color = <LED_COLOR_ID_WHITE>;
+       led-max-microamp = <150000>;
+     };
+     led@4 {
+       reg = <4>;
+       function = LED_FUNCTION_FLASH;
+       color = <LED_COLOR_ID_WHITE>;
+       function-enumerator = <1>;
+       led-max-microamp = <200000>;
+       flash-max-microamp = <500000>;
+       flash-max-timeout-us = <1024000>;
+     };
+     led@5 {
+       reg = <5>;
+       function = LED_FUNCTION_FLASH;
+       color = <LED_COLOR_ID_WHITE>;
+       function-enumerator = <2>;
+       led-max-microamp = <200000>;
+       flash-max-microamp = <500000>;
+       flash-max-timeout-us = <1024000>;
+     };
+   };
+
+  - |
+
+   led-controller {
+     compatible = "mediatek,mt6360-led";
+     #address-cells = <1>;
+     #size-cells = <0>;
+
+     led@0 {
+       reg = <0>;
+       function = LED_FUNCTION_INDICATOR;
+       color = <LED_COLOR_ID_RED>;
+       led-max-microamp = <24000>;
+     };
+     led@1 {
+       reg = <1>;
+       function = LED_FUNCTION_INDICATOR;
+       color = <LED_COLOR_ID_GREEN>;
+       led-max-microamp = <24000>;
+     };
+     led@2 {
+       reg = <2>;
+       function = LED_FUNCTION_INDICATOR;
+       color = <LED_COLOR_ID_BLUE>;
+       led-max-microamp = <24000>;
+     };
+     led@3 {
+       reg = <3>;
+       function = LED_FUNCTION_MOONLIGHT;
+       color = <LED_COLOR_ID_WHITE>;
+       led-max-microamp = <150000>;
+     };
+     led@4 {
+       reg = <4>;
+       function = LED_FUNCTION_FLASH;
+       color = <LED_COLOR_ID_WHITE>;
+       function-enumerator = <1>;
+       led-max-microamp = <200000>;
+       flash-max-microamp = <500000>;
+       flash-max-timeout-us = <1024000>;
+     };
+     led@5 {
+       reg = <5>;
+       function = LED_FUNCTION_FLASH;
+       color = <LED_COLOR_ID_WHITE>;
+       function-enumerator = <2>;
+       led-max-microamp = <200000>;
+       flash-max-microamp = <500000>;
+       flash-max-timeout-us = <1024000>;
+     };
+   };
+...