1 STMicroelectronics PWM driver bindings 1 STMicroelectronics PWM driver bindings
2 -------------------------------------- 2 --------------------------------------
3 3
4 Required parameters: 4 Required parameters:
5 - compatible : "st,pwm" 5 - compatible : "st,pwm"
6 - #pwm-cells : Number of cells used t 6 - #pwm-cells : Number of cells used to specify a PWM. First cell
7 specifies the per-chip 7 specifies the per-chip index of the PWM to use and the
8 second cell is the per 8 second cell is the period in nanoseconds - fixed to 2
9 for STiH41x. 9 for STiH41x.
10 - reg : Physical base address 10 - reg : Physical base address and length of the controller's
11 registers. 11 registers.
12 - pinctrl-names: Set to "default". 12 - pinctrl-names: Set to "default".
13 - pinctrl-0: List of phandles point 13 - pinctrl-0: List of phandles pointing to pin configuration nodes
14 for PWM module. 14 for PWM module.
15 For Pinctrl properties 15 For Pinctrl properties, please refer to [1].
16 - clock-names: Valid entries are "pwm 16 - clock-names: Valid entries are "pwm" and/or "capture".
17 - clocks: phandle of the clock u 17 - clocks: phandle of the clock used by the PWM module.
18 For Clk properties, pl 18 For Clk properties, please refer to [2].
19 - interrupts: IRQ for the Capture de 19 - interrupts: IRQ for the Capture device
20 20
21 Optional properties: 21 Optional properties:
22 - st,pwm-num-chan: Number of available PW 22 - st,pwm-num-chan: Number of available PWM channels. Default is 0.
23 - st,capture-num-chan: Number of available Ca 23 - st,capture-num-chan: Number of available Capture channels. Default is 0.
24 24
25 [1] Documentation/devicetree/bindings/pinctrl/ 25 [1] Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
26 [2] Documentation/devicetree/bindings/clock/cl 26 [2] Documentation/devicetree/bindings/clock/clock-bindings.txt
27 27
28 Example: 28 Example:
29 29
30 pwm1: pwm@fe510000 { 30 pwm1: pwm@fe510000 {
31 compatible = "st,pwm"; 31 compatible = "st,pwm";
32 reg = <0xfe510000 0x68>; 32 reg = <0xfe510000 0x68>;
33 #pwm-cells = <2>; 33 #pwm-cells = <2>;
34 pinctrl-names = "default"; 34 pinctrl-names = "default";
35 pinctrl-0 = <&pinctrl_pwm1_chan0_defau 35 pinctrl-0 = <&pinctrl_pwm1_chan0_default
36 &pinctrl_pwm1_chan1_defau 36 &pinctrl_pwm1_chan1_default
37 &pinctrl_pwm1_chan2_defau 37 &pinctrl_pwm1_chan2_default
38 &pinctrl_pwm1_chan3_defau 38 &pinctrl_pwm1_chan3_default>;
39 clocks = <&clk_sysin>; 39 clocks = <&clk_sysin>;
40 clock-names = "pwm"; 40 clock-names = "pwm";
41 st,pwm-num-chan = <4>; 41 st,pwm-num-chan = <4>;
42 st,capture-num-chan = <2>; 42 st,capture-num-chan = <2>;
43 }; 43 };
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.