@@ -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 {
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@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Russell King <linux@armlinux.org.uk> Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com> --- arch/arm/boot/dts/r8a7790.dtsi | 8 ++++++++ 1 file changed, 8 insertions(+) -- 2.11.0