tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1VIA/Wondermedia VT8500/WM8xxx series SoC PWM controller
2
3Required properties:
4- compatible: should be "via,vt8500-pwm"
5- reg: physical base address and length of the controller's registers
6- #pwm-cells: Should be 3. Number of cells being used to specify PWM property.
7 First cell specifies the per-chip index of the PWM to use, the second
8 cell is the period in nanoseconds and bit 0 in the third cell is used to
9 encode the polarity of PWM output. Set bit 0 of the third in PWM specifier
10 to 1 for inverse polarity & set to 0 for normal polarity.
11- clocks: phandle to the PWM source clock
12
13Example:
14
15pwm1: pwm@d8220000 {
16 #pwm-cells = <3>;
17 compatible = "via,vt8500-pwm";
18 reg = <0xd8220000 0x1000>;
19 clocks = <&clkpwm>;
20};