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SubjectRe: [PATCH v1 04/12] of: Add bindings of gpu hw throttle for Tegra soctherm
On Tue, Dec 18, 2018 at 03:34:36PM +0800, Wei Ni wrote:
> 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 | 22 ++++++++++++++++++----
> 2 files changed, 33 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.

Also, why not just use percents like nvidia,cpu-throt-percent?

> + 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.

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