Add DT binding for led-backlight.
Signed-off-by: Jean-Jacques Hiblot jjhiblot@ti.com Reviewed-by: Daniel Thompson daniel.thompson@linaro.org Reviewed-by: Sebastian Reichel sebastian.reichel@collabora.com --- .../bindings/leds/backlight/led-backlight.txt | 28 +++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/backlight/led-backlight.txt
diff --git a/Documentation/devicetree/bindings/leds/backlight/led-backlight.txt b/Documentation/devicetree/bindings/leds/backlight/led-backlight.txt new file mode 100644 index 000000000000..4c7dfbe7f67a --- /dev/null +++ b/Documentation/devicetree/bindings/leds/backlight/led-backlight.txt @@ -0,0 +1,28 @@ +led-backlight bindings + +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. + +Required properties: + - compatible: "led-backlight" + - leds: a list of LEDs + +Optional properties: + - brightness-levels: 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. + + - default-brightness-level: The default brightness level. + +Example: + + backlight { + compatible = "led-backlight"; + + leds = <&led1>, <&led2>; + brightness-levels = <0 4 8 16 32 64 128 255>; + default-brightness-level = <6>; + };