ARM: shmobile: ape6evm: add CPUFreq support

This patch adds OPPs to the CA15 DT node and a max8973 DT node to support
clock and voltage scaling, using the cpufreq-cpu0 CPUFreq driver.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/arch/arm/boot/dts/r8a73a4-ape6evm.dts b/arch/arm/boot/dts/r8a73a4-ape6evm.dts
index f603c69..e657a9d 100644 (file)
--- a/arch/arm/boot/dts/r8a73a4-ape6evm.dts
+++ b/arch/arm/boot/dts/r8a73a4-ape6evm.dts
@@ -50,3 +50,25 @@
                };
        };
 };
+
+&i2c5 {
+       vdd_dvfs: max8973@1b {
+               compatible = "maxim,max8973";
+               reg = <0x1b>;
+
+               regulator-min-microvolt = <935000>;
+               regulator-max-microvolt = <1200000>;
+               regulator-boot-on;
+               regulator-always-on;
+       };
+};
+
+&cpu0 {
+       cpu0-supply = <&vdd_dvfs>;
+       operating-points = <
+               /* kHz  uV */
+               1950000 1115000
+               1462500  995000
+       >;
+       voltage-tolerance = <1>; /* 1% */
+};