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Commit c7366e95 authored by Stefan Wahren's avatar Stefan Wahren Committed by Guenter Roeck
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dt-bindings: hwmon: (pwm-fan) Add tachometer interrupt 



This adds the tachometer interrupt to the pwm-fan binding, which is
necessary for RPM support.

Signed-off-by: default avatarStefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Reviewed-by: default avatarRobin Murphy <robin.murphy@arm.com>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent c112d758

Documentation/devicetree/bindings/hwmon/pwm-fan.txt

+20 −1
Original line number Original line Diff line number Diff line
@@ -8,6 +8,15 @@ Required properties: 




Optional properties:

Optional properties:

- fan-supply		: phandle to the regulator that provides power to the fan

- fan-supply		: phandle to the regulator that provides power to the fan

- interrupts		: This contains a single interrupt specifier which

			  describes the tachometer output of the fan as an

			  interrupt source. The output signal must generate a

			  defined number of interrupts per fan revolution, which

			  require that it must be self resetting edge interrupts.

			  See interrupt-controller/interrupts.txt for the format.

- pulses-per-revolution : define the tachometer pulses per fan revolution as

			  an integer (default is 2 interrupts per revolution).

			  The value must be greater than zero.





Example:

Example:

	fan0: pwm-fan {

	fan0: pwm-fan {
@@ -38,3 +47,13 @@ Example: 
					};

					};

			     };

			     };

		};

		};



Example 2:

	fan0: pwm-fan {

		compatible = "pwm-fan";

		pwms = <&pwm 0 40000 0>;

		fan-supply = <&reg_fan>;

		interrupt-parent = <&gpio5>;

		interrupts = <1 IRQ_TYPE_EDGE_FALLING>;

		pulses-per-revolution = <2>;

	};