[RFC PATCH v2 11/17] ARM: dts: tegra20: seaboard: Setup voltage regulators for DVFS

[Dmitry Osipenko]

Set min/max regulators voltage and add CPU node that hooks up CPU with
voltage regulators.

Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
---
 arch/arm/boot/dts/tegra20-seaboard.dts | 27 +++++++++++++++++++-------
 1 file changed, 20 insertions(+), 7 deletions(-)

diff --git a/arch/arm/boot/dts/tegra20-seaboard.dts b/arch/arm/boot/dts/tegra20-seaboard.dts
index f91441683aad..85bf7e89ebbe 100644
--- a/arch/arm/boot/dts/tegra20-seaboard.dts
+++ b/arch/arm/boot/dts/tegra20-seaboard.dts
@@ -444,16 +444,18 @@
 					regulator-always-on;
 				};
 
-				sm0 {
+				core_vdd_reg: sm0 {
 					regulator-name = "vdd_sm0,vdd_core";
-					regulator-min-microvolt = <1300000>;
+					regulator-min-microvolt = <1000000>;
 					regulator-max-microvolt = <1300000>;
+					regulator-coupled-with = <&rtc_vdd_reg>;
+					regulator-coupled-max-spread = <150000>;
 					regulator-always-on;
 				};
 
-				sm1 {
+				cpu_vdd_reg: sm1 {
 					regulator-name = "vdd_sm1,vdd_cpu";
-					regulator-min-microvolt = <1125000>;
+					regulator-min-microvolt = <750000>;
 					regulator-max-microvolt = <1125000>;
 					regulator-always-on;
 				};
@@ -474,10 +476,13 @@
 					regulator-always-on;
 				};
 
-				ldo2 {
+				rtc_vdd_reg: ldo2 {
 					regulator-name = "vdd_ldo2,vdd_rtc";
-					regulator-min-microvolt = <1200000>;
-					regulator-max-microvolt = <1200000>;
+					regulator-min-microvolt = <950000>;
+					regulator-max-microvolt = <1300000>;
+					regulator-coupled-with = <&core_vdd_reg>;
+					regulator-coupled-max-spread = <150000>;
+					regulator-always-on;
 				};
 
 				ldo3 {
@@ -938,4 +943,12 @@
 			 <&tegra_car TEGRA20_CLK_CDEV1>;
 		clock-names = "pll_a", "pll_a_out0", "mclk";
 	};
+
+	cpus {
+		cpu0: cpu@0 {
+			cpu-supply = <&cpu_vdd_reg>;
+			core-supply = <&core_vdd_reg>;
+			rtc-supply = <&rtc_vdd_reg>;
+		};
+	};
 };
-- 
2.19.0