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ARM: dts: rockchip: Use the GPU to cool CPU thermal zone of veyron mickey

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On rk3288 the CPU and GPU temperatures are correlated. Limit the GPU
frequency on veyron mickey to 400 MHz for CPU temperatures >= 65°C
and to 300 MHz for CPU temperatures >= 85°C.

This matches the configuration of the downstream Chrome OS 3.14 kernel,
the 'official' kernel for mickey.

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This commit is contained in:
Matthias Kaehlcke 2019-05-20 15:00:50 -07:00 committed by Heiko Stuebner
parent 75481833c6
commit 11983d8530
1 changed files with 11 additions and 3 deletions
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14
arch/arm/boot/dts/rk3288-veyron-mickey.dts
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@ -75,9 +75,7 @@
cooling-maps {
/*
* After 1st level, throttle the CPU down to as low as 1.4 GHz
* and don't let the GPU go faster than 400 MHz. Note that we
* won't throttle the GPU lower than 400 MHz due to CPU
* heat--we'll let the GPU do the rest itself.
* and don't let the GPU go faster than 400 MHz.
*/
cpu_warm_limit_cpu {
trip = <&cpu_alert_warm>;
@ -86,6 +84,10 @@
<&cpu2 THERMAL_NO_LIMIT 4>,
<&cpu3 THERMAL_NO_LIMIT 4>;
};
cpu_warm_limit_gpu {
trip = <&cpu_alert_warm>;
cooling-device = <&gpu 1 1>;
};
/*
* Add some discrete steps to help throttling system deal
@ -125,6 +127,12 @@
<&cpu2 8 THERMAL_NO_LIMIT>,
<&cpu3 8 THERMAL_NO_LIMIT>;
};
/* At very hot, don't let GPU go over 300 MHz */
cpu_very_hot_limit_gpu {
trip = <&cpu_alert_very_hot>;
cooling-device = <&gpu 2 2>;
};
};
};