1*c66ec88fSEmmanuel VadotTI/National Semiconductor LP3943 PWM controller 2*c66ec88fSEmmanuel Vadot 3*c66ec88fSEmmanuel VadotRequired properties: 4*c66ec88fSEmmanuel Vadot - compatible: "ti,lp3943-pwm" 5*c66ec88fSEmmanuel Vadot - #pwm-cells: Should be 2. See pwm.yaml in this directory for a 6*c66ec88fSEmmanuel Vadot description of the cells format. 7*c66ec88fSEmmanuel Vadot Note that this hardware limits the period length to the 8*c66ec88fSEmmanuel Vadot range 6250~1600000. 9*c66ec88fSEmmanuel Vadot - ti,pwm0 or ti,pwm1: Output pin number(s) for PWM channel 0 or 1. 10*c66ec88fSEmmanuel Vadot 0 = output 0 11*c66ec88fSEmmanuel Vadot 1 = output 1 12*c66ec88fSEmmanuel Vadot . 13*c66ec88fSEmmanuel Vadot . 14*c66ec88fSEmmanuel Vadot 15 = output 15 15*c66ec88fSEmmanuel Vadot 16*c66ec88fSEmmanuel VadotExample: 17*c66ec88fSEmmanuel VadotPWM 0 is for RGB LED brightness control 18*c66ec88fSEmmanuel VadotPWM 1 is for brightness control of LP8557 backlight device 19*c66ec88fSEmmanuel Vadot 20*c66ec88fSEmmanuel Vadot&i2c3 { 21*c66ec88fSEmmanuel Vadot lp3943@60 { 22*c66ec88fSEmmanuel Vadot compatible = "ti,lp3943"; 23*c66ec88fSEmmanuel Vadot reg = <0x60>; 24*c66ec88fSEmmanuel Vadot 25*c66ec88fSEmmanuel Vadot /* 26*c66ec88fSEmmanuel Vadot * PWM 0 : output 8, 9 and 10 27*c66ec88fSEmmanuel Vadot * PWM 1 : output 15 28*c66ec88fSEmmanuel Vadot */ 29*c66ec88fSEmmanuel Vadot pwm3943: pwm { 30*c66ec88fSEmmanuel Vadot compatible = "ti,lp3943-pwm"; 31*c66ec88fSEmmanuel Vadot #pwm-cells = <2>; 32*c66ec88fSEmmanuel Vadot ti,pwm0 = <8 9 10>; 33*c66ec88fSEmmanuel Vadot ti,pwm1 = <15>; 34*c66ec88fSEmmanuel Vadot }; 35*c66ec88fSEmmanuel Vadot }; 36*c66ec88fSEmmanuel Vadot 37*c66ec88fSEmmanuel Vadot}; 38*c66ec88fSEmmanuel Vadot 39*c66ec88fSEmmanuel Vadot/* LEDs control with PWM 0 of LP3943 */ 40*c66ec88fSEmmanuel Vadotpwmleds { 41*c66ec88fSEmmanuel Vadot compatible = "pwm-leds"; 42*c66ec88fSEmmanuel Vadot rgb { 43*c66ec88fSEmmanuel Vadot label = "indi::rgb"; 44*c66ec88fSEmmanuel Vadot pwms = <&pwm3943 0 10000>; 45*c66ec88fSEmmanuel Vadot max-brightness = <255>; 46*c66ec88fSEmmanuel Vadot }; 47*c66ec88fSEmmanuel Vadot}; 48*c66ec88fSEmmanuel Vadot 49*c66ec88fSEmmanuel Vadot&i2c4 { 50*c66ec88fSEmmanuel Vadot /* Backlight control with PWM 1 of LP3943 */ 51*c66ec88fSEmmanuel Vadot backlight@2c { 52*c66ec88fSEmmanuel Vadot compatible = "ti,lp8557"; 53*c66ec88fSEmmanuel Vadot reg = <0x2c>; 54*c66ec88fSEmmanuel Vadot 55*c66ec88fSEmmanuel Vadot pwms = <&pwm3943 1 10000>; 56*c66ec88fSEmmanuel Vadot pwm-names = "lp8557"; 57*c66ec88fSEmmanuel Vadot }; 58*c66ec88fSEmmanuel Vadot}; 59