pwm-lp3943.txt

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

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/pwm/pwm-lp3943.txt

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sys/contrib/device-tree/Bindings/pwm/pwm-lp3943.txt