| Message ID | 1551110359-19860-2-git-send-email-stefan.wahren@i2se.com (mailing list archive) |
|---|---|
| State | Changes Requested |
| Headers | show |
| Series | hwmon: pwm-fan: Add RPM support | expand |
On Mon, Feb 25, 2019 at 04:59:17PM +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> > --- > Documentation/devicetree/bindings/hwmon/pwm-fan.txt | 19 +++++++++++++++++++ > 1 file changed, 19 insertions(+) > > diff --git a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt > index 49ca5d8..7d09623 100644 > --- a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt > +++ b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt > @@ -8,6 +8,14 @@ Required properties: > > Optional properties: > - 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. > +- interrupt-ratio : defines the ratio interrupts per fan revolution as an > + integer (default is 2 interrupts per revolution) Name this for what it is, not how it is used. Using 'interrupt' is misleading that it is related to the interrupt binding. 'tach-pulse-per-rev' or something similar. > > Example: > fan0: pwm-fan { > @@ -38,3 +46,14 @@ 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>; > + interrupt-ratio = <2>; > + }; > -- > 2.7.4 >
diff --git a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt index 49ca5d8..7d09623 100644 --- a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt +++ b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt @@ -8,6 +8,14 @@ Required properties: Optional properties: - 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. +- interrupt-ratio : defines the ratio interrupts per fan revolution as an + integer (default is 2 interrupts per revolution) Example: fan0: pwm-fan { @@ -38,3 +46,14 @@ 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>; + interrupt-ratio = <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> --- Documentation/devicetree/bindings/hwmon/pwm-fan.txt | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)