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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | TI/National Semiconductor LP3943 PWM controller Required properties: - compatible: "ti,lp3943-pwm" - #pwm-cells: Should be 2. See pwm.yaml in this directory for a description of the cells format. Note that this hardware limits the period length to the range 6250~1600000. - ti,pwm0 or ti,pwm1: Output pin number(s) for PWM channel 0 or 1. 0 = output 0 1 = output 1 . . 15 = output 15 Example: PWM 0 is for RGB LED brightness control PWM 1 is for brightness control of LP8557 backlight device &i2c3 { lp3943@60 { compatible = "ti,lp3943"; reg = <0x60>; /* * PWM 0 : output 8, 9 and 10 * PWM 1 : output 15 */ pwm3943: pwm { compatible = "ti,lp3943-pwm"; #pwm-cells = <2>; ti,pwm0 = <8 9 10>; ti,pwm1 = <15>; }; }; }; /* LEDs control with PWM 0 of LP3943 */ pwmleds { compatible = "pwm-leds"; rgb { label = "indi::rgb"; pwms = <&pwm3943 0 10000>; max-brightness = <255>; }; }; &i2c4 { /* Backlight control with PWM 1 of LP3943 */ backlight@2c { compatible = "ti,lp8557"; reg = <0x2c>; pwms = <&pwm3943 1 10000>; pwm-names = "lp8557"; }; }; |