ARM: tegra: paz00: Set up voltage regulators for DVFS

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

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

diff --git a/arch/arm/boot/dts/tegra20-paz00.dts b/arch/arm/boot/dts/tegra20-paz00.dts
index 8861e0976e3759a0e5c437c086afa0664a1e3fa0..6e9fe192c6486c448a628aa88e7a4fe7215655f6 100644 (file)
--- a/arch/arm/boot/dts/tegra20-paz00.dts
+++ b/arch/arm/boot/dts/tegra20-paz00.dts
@@ -337,18 +337,26 @@ sys_reg: sys {
                                        regulator-always-on;
                                };
 
-                               sm0 {
+                               core_vdd_reg: sm0 {
                                        regulator-name = "+1.2vs_sm0,vdd_core";
                                        regulator-min-microvolt = <1200000>;
-                                       regulator-max-microvolt = <1200000>;
+                                       regulator-max-microvolt = <1225000>;
+                                       regulator-coupled-with = <&rtc_vdd_reg &cpu_vdd_reg>;
+                                       regulator-coupled-max-spread = <170000 450000>;
                                        regulator-always-on;
+
+                                       nvidia,tegra-core-regulator;
                                };
 
-                               sm1 {
+                               cpu_vdd_reg: sm1 {
                                        regulator-name = "+1.0vs_sm1,vdd_cpu";
-                                       regulator-min-microvolt = <1000000>;
-                                       regulator-max-microvolt = <1000000>;
+                                       regulator-min-microvolt = <750000>;
+                                       regulator-max-microvolt = <1100000>;
+                                       regulator-coupled-with = <&core_vdd_reg &rtc_vdd_reg>;
+                                       regulator-coupled-max-spread = <450000 450000>;
                                        regulator-always-on;
+
+                                       nvidia,tegra-cpu-regulator;
                                };
 
                                sm2_reg: sm2 {
@@ -367,10 +375,15 @@ ldo1 {
                                        regulator-always-on;
                                };
 
-                               ldo2 {
+                               rtc_vdd_reg: ldo2 {
                                        regulator-name = "+1.2vs_ldo2,vdd_rtc";
                                        regulator-min-microvolt = <1200000>;
-                                       regulator-max-microvolt = <1200000>;
+                                       regulator-max-microvolt = <1225000>;
+                                       regulator-coupled-with = <&core_vdd_reg &cpu_vdd_reg>;
+                                       regulator-coupled-max-spread = <170000 450000>;
+                                       regulator-always-on;
+
+                                       nvidia,tegra-rtc-regulator;
                                };
 
                                ldo3 {