[RFC PATCH v4 7/7] of: thermal: Introduce sustainable power for a thermal zone
From: Javi Merino <hidden>
Date: 2014-06-17 09:15:59
Also in:
linux-pm, lkml
Subsystem:
open firmware and flattened device tree bindings, the rest, thermal · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds, Rafael J. Wysocki, Daniel Lezcano
From: Punit Agrawal <redacted> 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 <rui.zhang@intel.com> Cc: Eduardo Valentin <edubezval@gmail.com> Signed-off-by: Punit Agrawal <redacted> --- 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 + 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 04b1be7fa018..eaf81ea654b9 100644
--- a/drivers/thermal/of-thermal.c
+++ b/drivers/thermal/of-thermal.c@@ -769,6 +769,7 @@ 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; tz = thermal_of_build_thermal_zone(child); if (IS_ERR(tz)) {
@@ -791,6 +792,9 @@ 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