[PATCH v25 01/16] dt: bindings: Add multicolor class dt bindings documention

[Dan Murphy <dmurphy@ti.com>]

Add DT bindings for the LEDs multicolor class framework.
Add multicolor ID to the color ID list for device tree bindings.

CC: Rob Herring <robh@kernel.org>
Acked-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
 .../bindings/leds/leds-class-multicolor.yaml  | 71 +++++++++++++++++++
 drivers/leds/led-core.c                       |  1 +
 include/dt-bindings/leds/common.h             |  3 +-
 3 files changed, 74 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml

diff --git a/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml b/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml
new file mode 100644
index 000000000000..fa6ea8e5c46b
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml
@@ -0,0 +1,71 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/leds-class-multicolor.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Common properties for the multicolor LED class.
+
+maintainers:
+  - Dan Murphy <dmurphy@ti.com>
+
+description: |
+  Bindings for multi color LEDs show how to describe current outputs of
+  either integrated multi-color LED elements (like RGB, RGBW, RGBWA-UV
+  etc.) or standalone LEDs, to achieve logically grouped multi-color LED
+  modules. This is achieved by adding multi-led nodes layer to the
+  monochrome LED bindings.
+  The nodes and properties defined in this document are unique to the multicolor
+  LED class.  Common LED nodes and properties are inherited from the common.txt
+  within this documentation directory.
+
+properties:
+  color:
+    description: |
+      For multicolor LED support this property should be defined as
+      LED_COLOR_ID_MULTI and further definition can be found in
+      include/linux/leds/common.h.
+
+required:
+  - color
+
+examples:
+  - |
+    #include <dt-bindings/leds/common.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        led-controller@14 {
+          #address-cells = <1>;
+          #size-cells = <0>;
+          compatible = "ti,lp5009";
+          reg = <0x14>;
+
+          multi-led@1 {
+            #address-cells = <1>;
+            #size-cells = <0>;
+            reg = <1>;
+            color = <LED_COLOR_ID_MULTI>;
+            function = LED_FUNCTION_CHARGING;
+
+            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>;
+            };
+          };
+        };
+    };
+
+additionalProperties: false
+...
diff --git a/drivers/leds/led-core.c b/drivers/leds/led-core.c
index f1f718dbe0f8..846248a0693d 100644
--- a/drivers/leds/led-core.c
+++ b/drivers/leds/led-core.c
@@ -34,6 +34,7 @@ const char * const led_colors[LED_COLOR_ID_MAX] = {
 	[LED_COLOR_ID_VIOLET] = "violet",
 	[LED_COLOR_ID_YELLOW] = "yellow",
 	[LED_COLOR_ID_IR] = "ir",
+	[LED_COLOR_ID_MULTI] = "multicolor",
 };
 EXPORT_SYMBOL_GPL(led_colors);
 
diff --git a/include/dt-bindings/leds/common.h b/include/dt-bindings/leds/common.h
index 0ce7dfc00dcb..a463ce6a8794 100644
--- a/include/dt-bindings/leds/common.h
+++ b/include/dt-bindings/leds/common.h
@@ -30,7 +30,8 @@
 #define LED_COLOR_ID_VIOLET	5
 #define LED_COLOR_ID_YELLOW	6
 #define LED_COLOR_ID_IR		7
-#define LED_COLOR_ID_MAX	8
+#define LED_COLOR_ID_MULTI	8
+#define LED_COLOR_ID_MAX	9
 
 /* Standard LED functions */
 /* Keyboard LEDs, usually it would be input4::capslock etc. */
-- 
2.25.1