linux-kernel - [PATCH 3/4] dt-bindings: leds: Add binding for a multicolor group of LEDs

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Message-ID: <20220615154918.521687-4-jjhiblot@traphandler.com>
Date:   Wed, 15 Jun 2022 17:49:17 +0200
From:   Jean-Jacques Hiblot <jjhiblot@...phandler.com>
To:     <pavel@....cz>, <robh+dt@...nel.org>,
        <sven.schwermer@...ruptive-technologies.com>,
        <krzysztof.kozlowski+dt@...aro.org>
CC:     <johan+linaro@...nel.org>, <marijn.suijten@...ainline.org>,
        <bjorn.andersson@...aro.org>, <andy.shevchenko@...il.com>,
        <linux-leds@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Jean-Jacques Hiblot <jjhiblot@...phandler.com>
Subject: [PATCH 3/4] dt-bindings: leds: Add binding for a multicolor group of LEDs

This allows to group multiple monochromatic LEDs into a multicolor
LED, e.g. RGB LEDs.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@...phandler.com>
---
 .../bindings/leds/leds-group-multicolor.yaml  | 94 +++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/leds/leds-group-multicolor.yaml

diff --git a/Documentation/devicetree/bindings/leds/leds-group-multicolor.yaml b/Documentation/devicetree/bindings/leds/leds-group-multicolor.yaml
new file mode 100644
index 000000000000..30a67985ae33
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/leds-group-multicolor.yaml
@@ -0,0 +1,94 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/leds-group-multicolor.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Multi-color LED built with monochromatic LEDs
+
+maintainers:
+  - Jean-Jacques Hiblot <jjhiblot@...phandler.com>
+
+description: |
+  This driver combines several monochromatic LEDs into one multi-color
+  LED using the multicolor LED class.
+
+properties:
+  compatible:
+    const: leds-group-multicolor
+
+  multi-led:
+    type: object
+
+    patternProperties:
+      "^led-[0-9a-z]+$":
+        type: object
+        $ref: common.yaml#
+
+        additionalProperties: false
+
+        properties:
+          leds:
+            maxItems: 1
+
+          color: true
+
+        required:
+          - leds
+          - color
+
+required:
+  - compatible
+
+allOf:
+  - $ref: leds-class-multicolor.yaml#
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/leds/common.h>
+
+    monochromatic-leds {
+        compatible = "gpio-leds";
+
+        led0: led-0 {
+            gpios = <&mcu_pio 0 GPIO_ACTIVE_LOW>;
+        };
+
+        led1: led-1 {
+            gpios = <&mcu_pio 1 GPIO_ACTIVE_HIGH>;
+        };
+
+        led2: led-2 {
+            gpios = <&mcu_pio 1 GPIO_ACTIVE_HIGH>;
+        };
+    };
+
+    multicolor-led-group {
+        compatible = "leds-group-multicolor";
+
+        multi-led {
+          color = <LED_COLOR_ID_RGB>;
+          function = LED_FUNCTION_INDICATOR;
+          max-brightness = <256>;
+
+          led-red {
+              leds = <&led0>;
+              color = <LED_COLOR_ID_RED>;
+          };
+
+          led-green {
+              leds = <&led1>;
+              color = <LED_COLOR_ID_GREEN>;
+          };
+
+          led-blue {
+              leds = <&led2>;
+              color = <LED_COLOR_ID_BLUE>;
+          };
+        };
+    };
+
+...
-- 
2.25.1