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3ccb1c1702
Add support to set polarity on PWM devices, allowing for inverted duty cycles. Also update the binding document to #pwm-cells = <3> to allow passing the flags from devicetree. Signed-off-by: Tony Prisk <linux@prisktech.co.nz> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
21 lines
729 B
Plaintext
21 lines
729 B
Plaintext
VIA/Wondermedia VT8500/WM8xxx series SoC PWM controller
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Required properties:
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- compatible: should be "via,vt8500-pwm"
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- reg: physical base address and length of the controller's registers
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- #pwm-cells: Should be 3. Number of cells being used to specify PWM property.
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First cell specifies the per-chip index of the PWM to use, the second
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cell is the period in nanoseconds and bit 0 in the third cell is used to
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encode the polarity of PWM output. Set bit 0 of the third in PWM specifier
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to 1 for inverse polarity & set to 0 for normal polarity.
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- clocks: phandle to the PWM source clock
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Example:
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pwm1: pwm@d8220000 {
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#pwm-cells = <3>;
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compatible = "via,vt8500-pwm";
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reg = <0xd8220000 0x1000>;
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clocks = <&clkpwm>;
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};
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