1BCM2835 PWM controller (Raspberry Pi controller) 2 3Required properties: 4- compatible: should be "brcm,bcm2835-pwm" 5- reg: physical base address and length of the controller's registers 6- clocks: This clock defines the base clock frequency of the PWM hardware 7 system, the period and the duty_cycle of the PWM signal is a multiple of 8 the base period. 9- #pwm-cells: Should be 3. See pwm.yaml in this directory for a description of 10 the cells format. 11 12Examples: 13 14pwm@2020c000 { 15 compatible = "brcm,bcm2835-pwm"; 16 reg = <0x2020c000 0x28>; 17 clocks = <&clk_pwm>; 18 #pwm-cells = <3>; 19}; 20 21clocks { 22 .... 23 clk_pwm: pwm { 24 compatible = "fixed-clock"; 25 reg = <3>; 26 #clock-cells = <0>; 27 clock-frequency = <9200000>; 28 }; 29 .... 30}; 31