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of: Add bindings of thermtrip for Tegra soctherm 

Add optional property "nvidia,thermtrips".
If present, these trips will be used as HW shutdown trips,
and critical trips will be used as SW shutdown trips.

Signed-off-by: Wei Ni <wni@nvidia.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
This commit is contained in:
Wei Ni 2019-02-21 18:18:36 +08:00 committed by Eduardo Valentin
parent 37624b5854
commit 9967a1bc81
1 changed files with 17 additions and 3 deletions
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20
Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.txt
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@ -55,10 +55,21 @@ Required properties :
- #cooling-cells: Should be 1. This cooling device only support on/off state.
See ./thermal.txt for a description of this property.
Optional properties:
- nvidia,thermtrips : When present, this property specifies the temperature at
which the soctherm hardware will assert the thermal trigger signal to the
Power Management IC, which can be configured to reset or shutdown the device.
It is an array of pairs where each pair represents a tsensor id followed by a
temperature in milli Celcius. In the absence of this property the critical
trip point will be used for thermtrip temperature.
Note:
- the "critical" type trip points will be set to SOC_THERM hardware as the
shut down temperature. Once the temperature of this thermal zone is higher
than it, the system will be shutdown or reset by hardware.
- the "critical" type trip points will be used to set the temperature at which
the SOC_THERM hardware will assert a thermal trigger if the "nvidia,thermtrips"
property is missing. When the thermtrips property is present, the breach of a
critical trip point is reported back to the thermal framework to implement
software shutdown.
- the "hot" type trip points will be set to SOC_THERM hardware as the throttle
temperature. Once the the temperature of this thermal zone is higher
than it, it will trigger the HW throttle event.
@ -79,6 +90,9 @@ Example :
#thermal-sensor-cells = <1>;
nvidia,thermtrips = <TEGRA124_SOCTHERM_SENSOR_CPU 102500
TEGRA124_SOCTHERM_SENSOR_GPU 103000>;
throttle-cfgs {
/*
* When the "heavy" cooling device triggered,