Kernel-4.18.0-80.el8_pwm-rockchip

Rockchip PWM controller

Required properties:

• compatible: should be “rockchip,-pwm”
  “rockchip,rk2928-pwm”: found on RK29XX,RK3066 and RK3188 SoCs
  “rockchip,rk3288-pwm”: found on RK3288 SOC
  “rockchip,rv1108-pwm”, “rockchip,rk3288-pwm”: found on RV1108 SoC
  “rockchip,vop-pwm”: found integrated in VOP on RK3288 SoC
• reg: physical base address and length of the controller’s registers
• clocks: See ../clock/clock-bindings.txt
  • For older hardware (rk2928, rk3066, rk3188, rk3228, rk3288, rk3399):
    • There is one clock that’s used both to derive the functional clock
      for the device and as the bus clock.
  • For newer hardware (rk3328 and future socs): specified by name
    • “pwm”: This is used to derive the functional clock.
    • “pclk”: This is the APB bus clock.
• #pwm-cells: must be 2 (rk2928) or 3 (rk3288). See pwm.txt in this directory
  for a description of the cell format.

Example:

pwm0: pwm@20030000 {
    compatible = "rockchip,rk2928-pwm";
    reg = <0x20030000 0x10>;
    clocks = <&cru PCLK_PWM01>;
    #pwm-cells = <2>;
};