The following 'capacity-dmips-mhz' dt property values are used: Cortex-A15: 1024, Cortex-A7: 539 They have been derived form the cpu_efficiency values: Cortex-A15: 3891, Cortex-A7: 2048 by scaling them so that the Cortex-A15s (big cores) use 1024. The cpu_efficiency values were originally derived from the "Big.LITTLE Processing with ARM Cortex™-A15 & Cortex-A7" white paper (http://www.cl.cam.ac.uk/~rdm34/big.LITTLE.pdf). Table 1 lists 1.9x (3891/2048) as the Cortex-A15 vs Cortex-A7 performance ratio for the Dhrystone benchmark. The following platform is affected once cpu-invariant accounting support is re-connected to the task scheduler: r8a7790-lager Cc: Rob Herring <robh+dt@xxxxxxxxxx> Cc: Mark Rutland <mark.rutland@xxxxxxx> Cc: Russell King <linux@xxxxxxxxxxxxxxx> Signed-off-by: Dietmar Eggemann <dietmar.eggemann@xxxxxxx> --- arch/arm/boot/dts/r8a7790.dtsi | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm/boot/dts/r8a7790.dtsi b/arch/arm/boot/dts/r8a7790.dtsi index 2805a8608d4b..a57c0e170d8b 100644 --- a/arch/arm/boot/dts/r8a7790.dtsi +++ b/arch/arm/boot/dts/r8a7790.dtsi @@ -56,6 +56,7 @@ clock-latency = <300000>; /* 300 us */ power-domains = <&sysc R8A7790_PD_CA15_CPU0>; next-level-cache = <&L2_CA15>; + capacity-dmips-mhz = <1024>; /* kHz - uV - OPPs unknown yet */ operating-points = <1400000 1000000>, @@ -73,6 +74,7 @@ clock-frequency = <1300000000>; power-domains = <&sysc R8A7790_PD_CA15_CPU1>; next-level-cache = <&L2_CA15>; + capacity-dmips-mhz = <1024>; }; cpu2: cpu@2 { @@ -82,6 +84,7 @@ clock-frequency = <1300000000>; power-domains = <&sysc R8A7790_PD_CA15_CPU2>; next-level-cache = <&L2_CA15>; + capacity-dmips-mhz = <1024>; }; cpu3: cpu@3 { @@ -91,6 +94,7 @@ clock-frequency = <1300000000>; power-domains = <&sysc R8A7790_PD_CA15_CPU3>; next-level-cache = <&L2_CA15>; + capacity-dmips-mhz = <1024>; }; cpu4: cpu@100 { @@ -100,6 +104,7 @@ clock-frequency = <780000000>; power-domains = <&sysc R8A7790_PD_CA7_CPU0>; next-level-cache = <&L2_CA7>; + capacity-dmips-mhz = <539>; }; cpu5: cpu@101 { @@ -109,6 +114,7 @@ clock-frequency = <780000000>; power-domains = <&sysc R8A7790_PD_CA7_CPU1>; next-level-cache = <&L2_CA7>; + capacity-dmips-mhz = <539>; }; cpu6: cpu@102 { @@ -118,6 +124,7 @@ clock-frequency = <780000000>; power-domains = <&sysc R8A7790_PD_CA7_CPU2>; next-level-cache = <&L2_CA7>; + capacity-dmips-mhz = <539>; }; cpu7: cpu@103 { @@ -127,6 +134,7 @@ clock-frequency = <780000000>; power-domains = <&sysc R8A7790_PD_CA7_CPU3>; next-level-cache = <&L2_CA7>; + capacity-dmips-mhz = <539>; }; L2_CA15: cache-controller-0 { -- 2.11.0
