| Message ID | 1424254056-5904-4-git-send-email-l.majewski@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Wed, Feb 18, 2015 at 11:07:31AM +0100, Lukasz Majewski wrote: > Explanation of several properties, which allow PWM fan working as a cooling > device, have been embraced in this commit. > > Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> > --- > Changes for v2: > - Rename cooling-pwm-values to cooling-levels > - Remove default-pulse-width property and stick to default hwmon policy > Changes for v3: > - Changing commit title from "hwmon: dts: Doc:" to "Documentation: dts" > - Remove unnecessary properties > - Set maximal cooling level to 230 instead of 255 > Changes for v4: > - None > --- > Documentation/devicetree/bindings/hwmon/pwm-fan.txt | 20 ++++++++++++++++++++ > 1 file changed, 20 insertions(+) > > diff --git a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt > index 610757c..d53fe0c 100644 > --- a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt > +++ b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt > @@ -3,10 +3,30 @@ Bindings for a fan connected to the PWM lines > Required properties: > - compatible : "pwm-fan" > - pwms : the PWM that is used to control the PWM fan > +- cooling-levels : PWM duty cycle values in a range from 0 to 255 > + which correspond to thermal cooling states > + > +Thorough description of the following bindings: > + cooling-min-state = <0>; > + cooling-max-state = <3>; > + #cooling-cells = <2>; > + thermal-zone { > + cpu_thermal: cpu-thermal { > + cooling-maps { > + map0 { > + trip = <&cpu_alert1>; > + cooling-device = <&fan0 0 1>; > + }; > + }; > + }; I am fine if you leave the reference to thermal.txt biding description, but I would prefer if you move the above lines to a proper example section. > + > +for PWM FAN used as cooling device can be found at: > +./Documentation/devicetree/bindings/thermal/thermal.txt > > Example: > pwm-fan { > compatible = "pwm-fan"; > status = "okay"; > pwms = <&pwm 0 10000 0>; > + cooling-levels = <0 102 170 230>; > }; > -- > 2.0.0.rc2 >
diff --git a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt index 610757c..d53fe0c 100644 --- a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt +++ b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt @@ -3,10 +3,30 @@ Bindings for a fan connected to the PWM lines Required properties: - compatible : "pwm-fan" - pwms : the PWM that is used to control the PWM fan +- cooling-levels : PWM duty cycle values in a range from 0 to 255 + which correspond to thermal cooling states + +Thorough description of the following bindings: + cooling-min-state = <0>; + cooling-max-state = <3>; + #cooling-cells = <2>; + thermal-zone { + cpu_thermal: cpu-thermal { + cooling-maps { + map0 { + trip = <&cpu_alert1>; + cooling-device = <&fan0 0 1>; + }; + }; + }; + +for PWM FAN used as cooling device can be found at: +./Documentation/devicetree/bindings/thermal/thermal.txt Example: pwm-fan { compatible = "pwm-fan"; status = "okay"; pwms = <&pwm 0 10000 0>; + cooling-levels = <0 102 170 230>; };
Explanation of several properties, which allow PWM fan working as a cooling device, have been embraced in this commit. Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> --- Changes for v2: - Rename cooling-pwm-values to cooling-levels - Remove default-pulse-width property and stick to default hwmon policy Changes for v3: - Changing commit title from "hwmon: dts: Doc:" to "Documentation: dts" - Remove unnecessary properties - Set maximal cooling level to 230 instead of 255 Changes for v4: - None --- Documentation/devicetree/bindings/hwmon/pwm-fan.txt | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)