Kernel-4.18.0-80.el8_pwm-st

STMicroelectronics PWM driver bindings

Required parameters:

• compatible : “st,pwm”
• #pwm-cells : Number of cells used to specify a PWM. First cell

        specifies the per-chip index of the PWM to use and the
        second cell is the period in nanoseconds - fixed to 2
        for STiH41x.
  

• reg : Physical base address and length of the controller’s

        registers.
  

• pinctrl-names: Set to “default”.
• pinctrl-0: List of phandles pointing to pin configuration nodes

        for PWM module.
        For Pinctrl properties, please refer to [1].
  

• clock-names: Valid entries are “pwm” and/or “capture”.
• clocks: phandle of the clock used by the PWM module.

        For Clk properties, please refer to [2].
  

• interrupts: IRQ for the Capture device

Optional properties:

• st,pwm-num-chan: Number of available PWM channels. Default is 0.
• st,capture-num-chan: Number of available Capture channels. Default is 0.

[1] Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
[2] Documentation/devicetree/bindings/clock/clock-bindings.txt

Example:

pwm1: pwm@fe510000 {
compatible = “st,pwm”;
reg = <0xfe510000 0x68>;
#pwm-cells = <2>;
pinctrl-names = “default”;
pinctrl-0 = <&pinctrl_pwm1_chan0_default
&pinctrl_pwm1_chan1_default
&pinctrl_pwm1_chan2_default
&pinctrl_pwm1_chan3_default>;
clocks = <&clk_sysin>;
clock-names = “pwm”;
st,pwm-num-chan = <4>;
st,capture-num-chan = <2>;
};