ARM: tegra: ventana: Support CPU and Core voltage scaling

Support CPU and Core voltage scaling on Tegra20 Ventana board.

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

diff --git a/arch/arm/boot/dts/tegra20-ventana.dts b/arch/arm/boot/dts/tegra20-ventana.dts
index 055334ae3d2889ceb5a84a7da8723b5564027ee6..02b94ed722d0b30a3a6f773b6febe6bd4ca641ac 100644 (file)
--- a/arch/arm/boot/dts/tegra20-ventana.dts
+++ b/arch/arm/boot/dts/tegra20-ventana.dts
@@ -4,6 +4,7 @@
 #include <dt-bindings/input/input.h>
 #include "tegra20.dtsi"
 #include "tegra20-cpu-opp.dtsi"
+#include "tegra20-cpu-opp-microvolt.dtsi"
 
 / {
        model = "NVIDIA Tegra20 Ventana evaluation board";
@@ -420,18 +421,28 @@
                                        regulator-always-on;
                                };
 
-                               sm0 {
+                               vdd_core: sm0 {
                                        regulator-name = "vdd_sm0,vdd_core";
-                                       regulator-min-microvolt = <1200000>;
-                                       regulator-max-microvolt = <1200000>;
+                                       regulator-min-microvolt = <950000>;
+                                       regulator-max-microvolt = <1300000>;
+                                       regulator-coupled-with = <&rtc_vdd &vdd_cpu>;
+                                       regulator-coupled-max-spread = <170000 550000>;
                                        regulator-always-on;
+                                       regulator-boot-on;
+
+                                       nvidia,tegra-core-regulator;
                                };
 
-                               sm1 {
+                               vdd_cpu: sm1 {
                                        regulator-name = "vdd_sm1,vdd_cpu";
-                                       regulator-min-microvolt = <1000000>;
-                                       regulator-max-microvolt = <1000000>;
+                                       regulator-min-microvolt = <750000>;
+                                       regulator-max-microvolt = <1125000>;
+                                       regulator-coupled-with = <&vdd_core &rtc_vdd>;
+                                       regulator-coupled-max-spread = <550000 550000>;
                                        regulator-always-on;
+                                       regulator-boot-on;
+
+                                       nvidia,tegra-cpu-regulator;
                                };
 
                                sm2_reg: sm2 {
@@ -450,10 +461,16 @@
                                        regulator-always-on;
                                };
 
-                               ldo2 {
+                               rtc_vdd: 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 = <&vdd_core &vdd_cpu>;
+                                       regulator-coupled-max-spread = <170000 550000>;
+                                       regulator-always-on;
+                                       regulator-boot-on;
+
+                                       nvidia,tegra-rtc-regulator;
                                };
 
                                ldo3 {
@@ -595,10 +612,12 @@
 
        cpus {
                cpu0: cpu@0 {
+                       cpu-supply = <&vdd_cpu>;
                        operating-points-v2 = <&cpu0_opp_table>;
                };
 
                cpu@1 {
+                       cpu-supply = <&vdd_cpu>;
                        operating-points-v2 = <&cpu0_opp_table>;
                };
        };