ARM: shmobile: koelsch dts: Add VDD MPU regulator for DVFS

The CA15 cluster is capable of voltage scaling. Add the regulator
in the i2c6 node, to allow the generic CPUFreq driver to use it.

Enable the i2c6 pin mux and the device node as well since the
da9210 is connected to that bus.

Note: In R-CAR Gen2, each frequency is using the same voltage,
and DVS control is not used. Therefore, this patch set the
voltage(Vmin/Vmax) to 1000mv.

Signed-off-by: Gaku Inami <gaku.inami.xw@bp.renesas.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/arch/arm/boot/dts/r8a7791-koelsch.dts b/arch/arm/boot/dts/r8a7791-koelsch.dts
index 05d44f9b202f5d5199c2f576298c76cd8774dfde..95331d73042d5aeafb409082ca1d2805dd2dee84 100644 (file)
--- a/arch/arm/boot/dts/r8a7791-koelsch.dts
+++ b/arch/arm/boot/dts/r8a7791-koelsch.dts
@@ -293,6 +293,11 @@
                                 "msiof0_tx";
                renesas,function = "msiof0";
        };
+
+       i2c6_pins: i2c6 {
+               renesas,groups = "i2c6";
+               renesas,function = "i2c6";
+       };
 };
 
 &ether {
@@ -408,3 +413,19 @@
                spi-cpha;
        };
 };
+
+&i2c6 {
+       pinctrl-names = "default";
+       pinctrl-0 = <&i2c6_pins>;
+       status = "okay";
+
+       vdd_dvfs: regulator@68 {
+               compatible = "diasemi,da9210";
+               reg = <0x68>;
+
+               regulator-min-microvolt = <1000000>;
+               regulator-max-microvolt = <1000000>;
+               regulator-boot-on;
+               regulator-always-on;
+       };
+};