of: Add bindings of gpu hw throttle for Tegra soctherm (7d8ac6b2) · Commits · 戴 / test

Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.txt

+15 −2

Original line number	Diff line number	Diff line
		@@ -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>;
		};

include/dt-bindings/thermal/tegra124-soctherm.h

+4 −4

Original line number	Diff line number	Diff line
		@@ -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

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