Add DT binding for led-backlight. Cc: devicetree@xxxxxxxxxxxxxxx Signed-off-by: Jean-Jacques Hiblot <jjhiblot@xxxxxx> --- .../leds/backlight/led-backlight.yaml | 55 +++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/backlight/led-backlight.yaml diff --git a/Documentation/devicetree/bindings/leds/backlight/led-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/led-backlight.yaml new file mode 100644 index 000000000000..47ae3d6b4f31 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/backlight/led-backlight.yaml @@ -0,0 +1,55 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/backlight/led-backlight.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: LED-based Backlight Device Tree Bindings + +maintainers: + - Jean-Jacques Hiblot <jjhiblot@xxxxxx> + +description: | + This binding is used to describe a basic backlight device made of LEDs. + It can also be used to describe a backlight device controlled by the + output of a LED driver. + +properties: + compatible: + const: led-backlight + + leds: + $ref: /schemas/types.yaml#/definitions/phandle-array + description: List of LEDs constitutive of the backlight. + + default-brightness: + $ref: /schemas/types.yaml#/definitions/uint32 + description: Default brightness level on boot. + minimum: 0 + + brightness-levels: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: Array of distinct brightness levels. The levels must be in + the range accepted by the underlying LED devices. This is used to + translate a backlight brightness level into a LED brightness level. If + it is not provided, the identity mapping is used. + +required: + - compatible + - backlight-leds + +examples: + - | + backlight { + compatible = "led-backlight"; + backlight-leds = <&led1>; + brightness-levels = <0 4 8 16 32 64 128 255>; + default-brightness = <6>; /*6th level => brightness of the LEDs is 128*/ + }; + - | + backlight { + compatible = "led-backlight"; + backlight-leds = <&led1>, <&led2>; + default-brightness = <255>; + }; +... -- 2.17.1
