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Subject[RFC PATCH v2 08/17] ARM: dts: tegra20: colibri: Setup voltage regulators for DVFS
Date
Set min/max regulators voltage and add CPU node that hooks up CPU with
voltage regulators.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
arch/arm/boot/dts/tegra20-colibri.dtsi | 31 ++++++++++++++++++--------
1 file changed, 22 insertions(+), 9 deletions(-)

diff --git a/arch/arm/boot/dts/tegra20-colibri.dtsi b/arch/arm/boot/dts/tegra20-colibri.dtsi
index 6162d193e12c..5b3155dbf47a 100644
--- a/arch/arm/boot/dts/tegra20-colibri.dtsi
+++ b/arch/arm/boot/dts/tegra20-colibri.dtsi
@@ -495,17 +495,19 @@
regulator-always-on;
};

- sm0 {
+ core_vdd_reg: sm0 {
regulator-name = "VDD_CORE_1.2V";
- regulator-min-microvolt = <1200000>;
- regulator-max-microvolt = <1200000>;
+ 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_CPU_1.0V";
- regulator-min-microvolt = <1000000>;
- regulator-max-microvolt = <1000000>;
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <1125000>;
regulator-always-on;
};

@@ -530,10 +532,13 @@
regulator-always-on;
};

- ldo2 {
+ rtc_vdd_reg: ldo2 {
regulator-name = "VDD_RTC_1.2V";
- 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 is not connected to anything */
@@ -740,6 +745,14 @@
<&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>;
+ };
+ };
};

&gpio {
--
2.19.0
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