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dt-bindings: backlight: Add led-backlight binding

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Add DT binding for led-backlight.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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Jean-Jacques Hiblot 2019-09-18 16:57:29 +02:00 committed by Lee Jones
parent 0e0e78e32e
commit cc2f2e10c2
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Documentation/devicetree/bindings/leds/backlight/led-backlight.txt Normal file
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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>;
};