On Fri, Dec 05, 2014 at 07:04:20PM +0000, Javi Merino wrote: > From: Punit Agrawal <[email protected]> > > Introduce an optional property called, sustainable-power, which > represents the power (in mW) which the thermal zone can safely > dissipate. > > If provided the property is parsed and associated with the thermal > zone via the thermal zone parameters. > > Cc: Zhang Rui <[email protected]> > Cc: Eduardo Valentin <[email protected]> > Signed-off-by: Punit Agrawal <[email protected]> > --- > Documentation/devicetree/bindings/thermal/thermal.txt | 4 ++++ > drivers/thermal/of-thermal.c | 4 ++++ > 2 files changed, 8 insertions(+) > > diff --git a/Documentation/devicetree/bindings/thermal/thermal.txt > b/Documentation/devicetree/bindings/thermal/thermal.txt > index f5db6b72a36f..c6eb9a8d2aed 100644 > --- a/Documentation/devicetree/bindings/thermal/thermal.txt > +++ b/Documentation/devicetree/bindings/thermal/thermal.txt > @@ -167,6 +167,10 @@ Optional property: > by means of sensor ID. Additional coefficients are > interpreted as constant offset. > > +- sustainable-power: An estimate of the sustainable power (in mW) that the > + Type: unsigned thermal zone can dissipate. > + Size: one cell > +
Please, include examples of this property, as you mentioned in the
governor documentation.
> Note: The delay properties are bound to the maximum dT/dt (temperature
> derivative over time) in two situations for a thermal zone:
> (i) - when passive cooling is activated (polling-delay-passive); and
> diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
> index 62143ba31001..e032b9bf4085 100644
> --- a/drivers/thermal/of-thermal.c
> +++ b/drivers/thermal/of-thermal.c
> @@ -794,6 +794,7 @@ int __init of_parse_thermal_zones(void)
> for_each_child_of_node(np, child) {
> struct thermal_zone_device *zone;
> struct thermal_zone_params *tzp;
> + u32 prop;
>
> /* Check whether child is enabled or not */
> if (!of_device_is_available(child))
> @@ -820,6 +821,9 @@ int __init of_parse_thermal_zones(void)
> /* No hwmon because there might be hwmon drivers registering */
> tzp->no_hwmon = true;
>
> + if (!of_property_read_u32(child, "sustainable-power", &prop))
> + tzp->sustainable_power = prop;
> +
> zone = thermal_zone_device_register(child->name, tz->ntrips,
> 0, tz,
> ops, tzp,
> --
> 1.9.1
>
>
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