pwm: Add device tree binding document for IMG PWM DAC (9c959bfe) · Commits · 戴 / test

Add binding document for IMG Pulse Width Modulator (PWM) DAC present on the Pistachio SOC. The PWM DAC has four channels. Signed-off-by:

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

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		*Imagination Technologies PWM DAC driver

		Required properties:
		- compatible: Should be "img,pistachio-pwm"
		- reg: Should contain physical base address and length of pwm registers.
		- clocks: Must contain an entry for each entry in clock-names.
		See ../clock/clock-bindings.txt for details.
		- clock-names: Must include the following entries.
		- pwm: PWM operating clock.
		- sys: PWM system interface clock.
		- #pwm-cells: Should be 2. See pwm.txt in this directory for the
		description of the cells format.
		- img,cr-periph: Must contain a phandle to the peripheral control
		syscon node which contains PWM control registers.

		Example:
		pwm: pwm@18101300 {
		compatible = "img,pistachio-pwm";
		reg = <0x18101300 0x100>;
		clocks = <&pwm_clk>, <&system_clk>;
		clock-names = "pwm", "sys";
		#pwm-cells = <2>;
		img,cr-periph = <&cr_periph>;
		};