| Message ID | 1553243043-19486-2-git-send-email-stefan.wahren@i2se.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | hwmon: pwm-fan: Add RPM support | expand |
On Fri, Mar 22, 2019 at 09:24:01AM +0100, Stefan Wahren wrote: > This adds the tachometer interrupt to the pwm-fan binding, which is > necessary for RPM support. > > Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com> > --- > .../devicetree/bindings/hwmon/pwm-fan.txt | 22 +++++++++++++++++++++- > 1 file changed, 21 insertions(+), 1 deletion(-) > > diff --git a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt > index 49ca5d8..722005f 100644 > --- a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt > +++ b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt > @@ -7,7 +7,16 @@ Required properties: > which correspond to thermal cooling states > > 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: > fan0: pwm-fan { > @@ -38,3 +47,14 @@ Example: > }; > }; > }; > + > +Example 2: > + fan0: pwm-fan { > + fan0: pwm-fan { This line should go. Otherwise, Reviewed-by: Rob Herring <robh@kernel.org> > + compatible = "pwm-fan"; > + pwms = <&pwm 0 40000 0>; > + fan-supply = <®_fan>; > + interrupt-parent = <&gpio5>; > + interrupts = <1 IRQ_TYPE_EDGE_FALLING>; > + pulses-per-revolution = <2>; > + }; > -- > 2.7.4 >
diff --git a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt index 49ca5d8..722005f 100644 --- a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt +++ b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt @@ -7,7 +7,16 @@ Required properties: which correspond to thermal cooling states 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: fan0: pwm-fan { @@ -38,3 +47,14 @@ Example: }; }; }; + +Example 2: + fan0: pwm-fan { + fan0: pwm-fan { + compatible = "pwm-fan"; + pwms = <&pwm 0 40000 0>; + fan-supply = <®_fan>; + interrupt-parent = <&gpio5>; + interrupts = <1 IRQ_TYPE_EDGE_FALLING>; + pulses-per-revolution = <2>; + };
This adds the tachometer interrupt to the pwm-fan binding, which is necessary for RPM support. Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com> --- .../devicetree/bindings/hwmon/pwm-fan.txt | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-)