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arm64: dts: mt8173: Fix cpu_thermal cooling-maps contributions 

According to [0], the contribution field for each cooling-device express
their relative power efficiency. Higher weights express higher power
efficiency.  Weighting is relative such that if each cooling device has a
weight of 1 they are considered equal. This is particularly useful in
heterogeneous systems where two cooling devices may perform the same kind
of compute, but with different efficiency.

[0] Documentation/thermal/power_allocator.txt

According to Mediatek IC designer, the power efficiency ratio between the
LITTLE core cluster (cooling-device cpu0) and big core cluster
(cooling-device cpu1) is around 3:1 (3072:1024).

Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
This commit is contained in:
Daniel Kurtz 2017-01-13 10:30:05 +08:00 committed by Matthias Brugger
parent fc6634ac0e
commit 7fcef92db8
1 changed files with 2 additions and 2 deletions
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4
arch/arm64/boot/dts/mediatek/mt8173.dtsi
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@ -182,12 +182,12 @@
map@0 {
trip = <&target>;
cooling-device = <&cpu0 0 0>;
contribution = <1024>;
contribution = <3072>;
};
map@1 {
trip = <&target>;
cooling-device = <&cpu2 0 0>;
contribution = <2048>;
contribution = <1024>;
};
};
};