From mboxrd@z Thu Jan 1 00:00:00 1970 From: matthias.bgg@gmail.com (Matthias Brugger) Date: Fri, 13 Jan 2017 16:36:17 +0100 Subject: [PATCH] arm64: dts: mt8173: Fix cpu_thermal cooling-maps contributions In-Reply-To: <20170113023006.150845-1-djkurtz@chromium.org> References: <20170113023006.150845-1-djkurtz@chromium.org> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 13/01/17 03:30, Daniel Kurtz wrote: > 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 > --- > arch/arm64/boot/dts/mediatek/mt8173.dtsi | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > applied, thanks. > diff --git a/arch/arm64/boot/dts/mediatek/mt8173.dtsi b/arch/arm64/boot/dts/mediatek/mt8173.dtsi > index 12e702771f5c..9a3b0d20f7a8 100644 > --- a/arch/arm64/boot/dts/mediatek/mt8173.dtsi > +++ b/arch/arm64/boot/dts/mediatek/mt8173.dtsi > @@ -182,12 +182,12 @@ > map at 0 { > trip = <&target>; > cooling-device = <&cpu0 0 0>; > - contribution = <1024>; > + contribution = <3072>; > }; > map at 1 { > trip = <&target>; > cooling-device = <&cpu2 0 0>; > - contribution = <2048>; > + contribution = <1024>; > }; > }; > }; >