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To: linux-leds@vger.kernel.org, devicetree@vger.kernel.org,
 linux-pwm@vger.kernel.org
Cc: Sven Schwermer <sven.schwermer@disruptive-technologies.com>,
 pavel@ucw.cz, dmurphy@ti.com, robh+dt@kernel.org,
 thierry.reding@gmail.com, u.kleine-koenig@pengutronix.de,
 lee.jones@linaro.org
Subject: [RFC PATCH 1/2] dt-bindings: leds: Add multicolor PWM LED bindings
Date: Tue, 25 Jan 2022 10:22:38 +0100
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From: Sven Schwermer <sven.schwermer@disruptive-technologies.com>

This allows to group multiple PWM-connected monochrome LEDs into
multicolor LEDs, e.g. RGB LEDs.

Signed-off-by: Sven Schwermer <sven.schwermer@disruptive-technologies.com>
---
 .../bindings/leds/leds-pwm-multicolor.yaml    | 73 +++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/leds/leds-pwm-multicolor.yaml

diff --git a/Documentation/devicetree/bindings/leds/leds-pwm-multicolor.yaml b/Documentation/devicetree/bindings/leds/leds-pwm-multicolor.yaml
new file mode 100644
index 000000000000..8552a5498bdd
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/leds-pwm-multicolor.yaml
@@ -0,0 +1,73 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/leds-pwm-multicolor.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Multi-color LEDs connected to PWM
+
+maintainers:
+  - Sven Schwermer <sven.schwermer@disruptive-technologies.com>
+
+description: |
+  This driver combines several monochrome PWM LEDs into one multi-color
+  LED using the multicolor LED class.
+
+properties:
+  compatible: pwm-leds-multicolor
+
+patternProperties:
+  '^multi-led@[0-9a-f]$':
+    type: object
+    allOf:
+      - $ref: leds-class-multicolor.yaml#
+
+    patternProperties:
+      "^led-[0-9a-z]+$":
+        type: object
+        properties:
+          pwms:
+            maxItems: 1
+
+          pwm-names: true
+
+          color:
+            $ref: common.yaml#/properties/color
+
+required:
+  - compatible
+  - pwms
+  - color
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/leds/common.h>
+
+    rgb-led {
+        compatible = "pwm-leds-multicolor";
+
+        multi-led@0 {
+          color = <LED_COLOR_ID_RGB>;
+          function = LED_FUNCTION_INDICATOR;
+          max-brightness = <65535>;
+
+          led-red {
+              pwms = <&pwm1 0 1000000>;
+              color = <LED_COLOR_ID_RED>;
+          };
+
+          led-green {
+              pwms = <&pwm2 0 1000000>;
+              color = <LED_COLOR_ID_GREEN>;
+          };
+
+          led-blue {
+              pwms = <&pwm3 0 1000000>;
+              color = <LED_COLOR_ID_BLUE>;
+          };
+        };
+    };
+
+...