ARM: tegra: cardhu-a04: Set up voltage regulators for DVFS

Set minimum and maximum voltages, and couple CPU/CORE regulators.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm/boot/dts/tegra30-cardhu-a04.dts

@@ -103,4 +103,28 @@
 			gpio = <&gpio TEGRA_GPIO(DD, 0) GPIO_ACTIVE_HIGH>;
 		};
 	};
+
+	i2c@7000d000 {
+		pmic: tps65911@2d {
+			regulators {
+				vddctrl_reg: vddctrl {
+					regulator-min-microvolt = <800000>;
+					regulator-max-microvolt = <1125000>;
+					regulator-coupled-with = <&vddcore_reg>;
+					regulator-coupled-max-spread = <300000>;
+					regulator-max-step-microvolt = <100000>;
+
+					nvidia,tegra-cpu-regulator;
+				};
+			};
+		};
+
+		vddcore_reg: tps62361@60 {
+			regulator-coupled-with = <&vddctrl_reg>;
+			regulator-coupled-max-spread = <300000>;
+			regulator-max-step-microvolt = <100000>;
+
+			nvidia,tegra-core-regulator;
+		};
+	};
 };