[PATCH v2 11/12] of: Add bindings of OC hw throttle for Tegra soctherm

Wei Ni
2019-02-21T10:19:27Z

Add OC HW throttle configuration for soctherm in DT.
It is used to describe the OCx throttle events.

Signed-off-by: Wei Ni <wni@nvidia.com>
---
.../bindings/thermal/nvidia,tegra124-soctherm.txt | 25 ++++++++++++++++++++++
1 file changed, 25 insertions(+)

diff --git a/Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.txt b/Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.txt
index cf6d0be56b7a..f02f38527a6b 100644
--- a/Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.txt
+++ b/Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.txt
@@ -64,6 +64,20 @@ 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: The following properties are T210 specific and
+ valid only for OCx throttle events.
+ - nvidia,count-threshold: Specifies the number of OC events that are
+ required for triggering an interrupt. Interrupts are not triggered if
+ the property is missing. A value of 0 will interrupt on every OC alarm.
+ - nvidia,polarity-active-low: Configures the polarity of the OC alaram
+ signal. If present, this means assert low, otherwise assert high.
+ - nvidia,alarm-filter: Number of clocks to filter event. When the filter
+ expires (which means the OC event has not occurred for a long time),
+ the counter is cleared and filter is rearmed. Default value is 0.
+ - nvidia,throttle-period-us: Specifies the number of uSec for which
+ throttling is engaged after the OC event is deasserted. Default value
+ is 0.
+
Optional properties:
- nvidia,thermtrips : When present, this property specifies the temperature at
which the soctherm hardware will assert the thermal trigger signal to the
@@ -134,6 +148,17 @@ Example :
* arbiter will select the highest priority as the final throttle
* settings to skip cpu pulse.
*/
+
+ throttle_oc1: oc1 {
+ nvidia,priority = <50>;
+ nvidia,polarity-active-low;
+ nvidia,count-threshold = <100>;
+ nvidia,alarm-filter = <5100000>;
+ nvidia,throttle-period-us = <0>;
+ nvidia,cpu-throt-percent = <75>;
+ nvidia,gpu-throt-level =
+ <TEGRA_SOCTHERM_THROT_LEVEL_MED>;
+ };
};
};

--
2.7.4