[PATCH v2 04/12] of: Add bindings of gpu hw throttle for Tegra soctherm

Wei Ni
2019-02-21T10:20:16Z

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

Signed-off-by: Wei Ni <wni@nvidia.com>
---
.../bindings/thermal/nvidia,tegra124-soctherm.txt | 17 +++++++++++++++--
include/dt-bindings/thermal/tegra124-soctherm.h | 8 ++++----
2 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.txt b/Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.txt
index ab66d6feab4b..cf6d0be56b7a 100644
--- a/Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.txt
+++ b/Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.txt
@@ -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>;
};
diff --git a/include/dt-bindings/thermal/tegra124-soctherm.h b/include/dt-bindings/thermal/tegra124-soctherm.h
index c15e8b709a0d..444c7bdde146 100644
--- a/include/dt-bindings/thermal/tegra124-soctherm.h
+++ b/include/dt-bindings/thermal/tegra124-soctherm.h
@@ -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
--
2.7.4