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Diffstat (limited to 'Documentation/devicetree/bindings/leds/backlight/led-backlight.yaml')
-rw-r--r-- | Documentation/devicetree/bindings/leds/backlight/led-backlight.yaml | 59 |
1 files changed, 59 insertions, 0 deletions
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 000000000..0793d0adc --- /dev/null +++ b/Documentation/devicetree/bindings/leds/backlight/led-backlight.yaml @@ -0,0 +1,59 @@ +# SPDX-License-Identifier: GPL-2.0-only +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/backlight/led-backlight.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: led-backlight bindings + +maintainers: + - Lee Jones <lee@kernel.org> + - Daniel Thompson <daniel.thompson@linaro.org> + - Jingoo Han <jingoohan1@gmail.com> + +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: + description: A list of LED nodes + $ref: /schemas/types.yaml#/definitions/phandle-array + items: + maxItems: 1 + + brightness-levels: + 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. + $ref: /schemas/types.yaml#/definitions/uint32-array + + default-brightness-level: + description: + The default brightness level (index into the array defined by the + "brightness-levels" property). + $ref: /schemas/types.yaml#/definitions/uint32 + +required: + - compatible + - leds + +additionalProperties: false + +examples: + - | + backlight { + compatible = "led-backlight"; + + leds = <&led1>, <&led2>; + brightness-levels = <0 4 8 16 32 64 128 255>; + default-brightness-level = <6>; + }; + +... |