Documentation/devicetree/bindings/pwm/pwm-st.txt

   1 STMicroelectronics PWM driver bindings
   2 --------------------------------------
   3
   4 Required parameters:
   5 - compatible :          "st,pwm"
   6 - #pwm-cells :          Number of cells used to specify a PWM. First cell
   7                         specifies the per-chip index of the PWM to use and the
   8                         second cell is the period in nanoseconds - fixed to 2
   9                         for STiH41x.
  10 - reg :                 Physical base address and length of the controller's
  11                         registers.
  12 - pinctrl-names:        Set to "default".
  13 - pinctrl-0:            List of phandles pointing to pin configuration nodes
  14                         for PWM module.
  15                         For Pinctrl properties, please refer to [1].
  16 - clock-names:          Valid entries are "pwm" and/or "capture".
  17 - clocks:               phandle of the clock used by the PWM module.
  18                         For Clk properties, please refer to [2].
  19 - interrupts:           IRQ for the Capture device
  20
  21 Optional properties:
  22 - st,pwm-num-chan:      Number of available PWM channels.  Default is 0.
  23 - st,capture-num-chan:  Number of available Capture channels.  Default is 0.
  24
  25 [1] Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
  26 [2] Documentation/devicetree/bindings/clock/clock-bindings.txt
  27
  28 Example:
  29
  30 pwm1: pwm@fe510000 {
  31         compatible = "st,pwm";
  32         reg = <0xfe510000 0x68>;
  33         #pwm-cells = <2>;
  34         pinctrl-names = "default";
  35         pinctrl-0 = <&pinctrl_pwm1_chan0_default
  36                      &pinctrl_pwm1_chan1_default
  37                      &pinctrl_pwm1_chan2_default
  38                      &pinctrl_pwm1_chan3_default>;
  39         clocks = <&clk_sysin>;
  40         clock-names = "pwm";
  41         st,pwm-num-chan = <4>;
  42         st,capture-num-chan = <2>;
  43 };