tjh.dev
Linux kernel mirror (for testing)
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kernel
os
linux
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
14Optional properties:
15 - pwm-names: a list of names for the PWM devices specified in the
16 "pwms" property (see PWM binding[0])
17
18[0]: Documentation/devicetree/bindings/pwm/pwm.txt
19
20Example:
21
22 backlight {
23 compatible = "pwm-backlight";
24 pwms = <&pwm 0 5000000>;
25
26 brightness-levels = <0 4 8 16 32 64 128 255>;
27 default-brightness-level = <6>;
28 };