of: Add bindings of gpu hw throttle for Tegra soctherm

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>

diff --git a/Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.txt b/Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.txt
index ab66d6f..cf6d0be 100644 (file)
--- 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 c15e8b7..444c7bd 100644 (file)
--- 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