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of: Add bindings of gpu hw throttle for Tegra soctherm

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Add "nvidia,gpu-throt-level" property to set gpu hw
throttle level.

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 18:18:39 +08:00 committed by Eduardo Valentin
parent 2510aa56ab
commit 7d8ac6b282
2 changed files with 19 additions and 6 deletions
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17
Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.txt
View File

@ -52,6 +52,15 @@ Required properties :
Must set as following values:
TEGRA_SOCTHERM_THROT_LEVEL_LOW, TEGRA_SOCTHERM_THROT_LEVEL_MED
TEGRA_SOCTHERM_THROT_LEVEL_HIGH, TEGRA_SOCTHERM_THROT_LEVEL_NONE
- nvidia,gpu-throt-level: This property is for Tegra124 and Tegra210.
It is the level of pulse skippers, which used to throttle clock
frequencies. It indicates gpu clock throttling depth and can be
programmed to any of the following values which represent a throttling
percentage:
TEGRA_SOCTHERM_THROT_LEVEL_NONE (0%)
TEGRA_SOCTHERM_THROT_LEVEL_LOW (50%),
TEGRA_SOCTHERM_THROT_LEVEL_MED (75%),
TEGRA_SOCTHERM_THROT_LEVEL_HIGH (85%).
- #cooling-cells: Should be 1. This cooling device only support on/off state.
See ./thermal.txt for a description of this property.
@ -96,22 +105,26 @@ Example :
throttle-cfgs {
/*
* When the "heavy" cooling device triggered,
* the HW will skip cpu clock's pulse in 85% depth
* the HW will skip cpu clock's pulse in 85% depth,
* skip gpu clock's pulse in 85% level
*/
throttle_heavy: heavy {
nvidia,priority = <100>;
nvidia,cpu-throt-percent = <85>;
nvidia,gpu-throt-level = <TEGRA_SOCTHERM_THROT_LEVEL_HIGH>;
#cooling-cells = <1>;
};
/*
* When the "light" cooling device triggered,
* the HW will skip cpu clock's pulse in 50% depth
* the HW will skip cpu clock's pulse in 50% depth,
* skip gpu clock's pulse in 50% level
*/
throttle_light: light {
nvidia,priority = <80>;
nvidia,cpu-throt-percent = <50>;
nvidia,gpu-throt-level = <TEGRA_SOCTHERM_THROT_LEVEL_LOW>;
#cooling-cells = <1>;
};

8
include/dt-bindings/thermal/tegra124-soctherm.h
View File

@ -12,9 +12,9 @@
#define TEGRA124_SOCTHERM_SENSOR_PLLX 3
#define TEGRA124_SOCTHERM_SENSOR_NUM 4
#define TEGRA_SOCTHERM_THROT_LEVEL_LOW 0
#define TEGRA_SOCTHERM_THROT_LEVEL_MED 1
#define TEGRA_SOCTHERM_THROT_LEVEL_HIGH 2
#define TEGRA_SOCTHERM_THROT_LEVEL_NONE -1
#define TEGRA_SOCTHERM_THROT_LEVEL_NONE 0
#define TEGRA_SOCTHERM_THROT_LEVEL_LOW 1
#define TEGRA_SOCTHERM_THROT_LEVEL_MED 2
#define TEGRA_SOCTHERM_THROT_LEVEL_HIGH 3
#endif