Add an operating point for running the Cortex-A76 CPU cores on R-Car
V4H at 1.8 GHz (High Performance mode).
Based on a patch in the BSP by Tho Vu.
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
Tested on the Renesas White-Hawk development board by using the CPUfreq
userspace governor, enabling boost mode, writing the desired CPU clock
rate to the CPUfreq policy's "scaling_setspeed" file in sysfs, verifying
the clock rate of the Z0φ clock in debugfs, and running the dhrystones
benchmark on the various CPU cores.
$ echo 1 > /sys/devices/system/cpu/cpufreq/boost
$ echo 1800000 > /sys/devices/system/cpu/cpufreq/policy0/scaling_setspeed
---
arch/arm64/boot/dts/renesas/r8a779g0.dtsi | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/arm64/boot/dts/renesas/r8a779g0.dtsi b/arch/arm64/boot/dts/renesas/r8a779g0.dtsi
index 83d1666a2ea16de2..7a87a5dc1b6ad219 100644
--- a/arch/arm64/boot/dts/renesas/r8a779g0.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a779g0.dtsi
@@ -39,6 +39,12 @@ opp-1700000000 {
clock-latency-ns = <500000>;
opp-suspend;
};
+ opp-1800000000 {
+ opp-hz = /bits/ 64 <1800000000>;
+ opp-microvolt = <880000>;
+ clock-latency-ns = <500000>;
+ turbo-mode;
+ };
};
cpus {
--
2.25.1
