1pwm-backlight bindings
2
3Required properties:
4  - compatible: "pwm-backlight"
5  - pwms: OF device-tree PWM specification (see PWM binding[0])
6  - brightness-levels: Array of distinct brightness levels. Typically these
7      are in the range from 0 to 255, but any range starting at 0 will do.
8      The actual brightness level (PWM duty cycle) will be interpolated
9      from these values. 0 means a 0% duty cycle (darkest/off), while the
10      last value in the array represents a 100% duty cycle (brightest).
11  - default-brightness-level: the default brightness level (index into the
12      array defined by the "brightness-levels" property)
13  - power-supply: regulator for supply voltage
14
15Optional properties:
16  - pwm-names: a list of names for the PWM devices specified in the
17               "pwms" property (see PWM binding[0])
18  - enable-gpios: contains a single GPIO specifier for the GPIO which enables
19                  and disables the backlight (see GPIO binding[1])
20
21[0]: Documentation/devicetree/bindings/pwm/pwm.txt
22[1]: Documentation/devicetree/bindings/gpio/gpio.txt
23
24Example:
25
26	backlight {
27		compatible = "pwm-backlight";
28		pwms = <&pwm 0 5000000>;
29
30		brightness-levels = <0 4 8 16 32 64 128 255>;
31		default-brightness-level = <6>;
32
33		power-supply = <&vdd_bl_reg>;
34		enable-gpios = <&gpio 58 0>;
35	};
36