TI/National Semiconductor LP3943 PWM controller
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Required properties:
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- compatible: "ti,lp3943-pwm"
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- #pwm-cells: Should be 2. See pwm.yaml in this directory for a
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description of the cells format.
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Note that this hardware limits the period length to the
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range 6250~1600000.
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- ti,pwm0 or ti,pwm1: Output pin number(s) for PWM channel 0 or 1.
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0 = output 0
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1 = output 1
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.
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.
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15 = output 15
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Example:
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PWM 0 is for RGB LED brightness control
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PWM 1 is for brightness control of LP8557 backlight device
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&i2c3 {
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lp3943@60 {
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compatible = "ti,lp3943";
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reg = <0x60>;
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/*
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* PWM 0 : output 8, 9 and 10
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* PWM 1 : output 15
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*/
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pwm3943: pwm {
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compatible = "ti,lp3943-pwm";
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#pwm-cells = <2>;
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ti,pwm0 = <8 9 10>;
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ti,pwm1 = <15>;
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};
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};
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};
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/* LEDs control with PWM 0 of LP3943 */
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pwmleds {
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compatible = "pwm-leds";
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rgb {
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label = "indi::rgb";
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pwms = <&pwm3943 0 10000>;
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max-brightness = <255>;
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};
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};
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&i2c4 {
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/* Backlight control with PWM 1 of LP3943 */
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backlight@2c {
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compatible = "ti,lp8557";
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reg = <0x2c>;
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pwms = <&pwm3943 1 10000>;
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pwm-names = "lp8557";
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};
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};
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