[PATCH v1 28/30] ARM: tegra: acer-a500: Add voltage supplies to DVFS-capable devices

Dmitry Osipenko
2020-11-04T23:46:56Z

Add voltage supplies to DVFS-capable devices in order to enable
system-wide voltage scaling and allow CORE/RTC regulators to go lower.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
.../boot/dts/tegra20-acer-a500-picasso.dts | 30 +++++++++++++++++--
1 file changed, 28 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/tegra20-acer-a500-picasso.dts b/arch/arm/boot/dts/tegra20-acer-a500-picasso.dts
index b4ed88802387..5ab6872cd84c 100644
--- a/arch/arm/boot/dts/tegra20-acer-a500-picasso.dts
+++ b/arch/arm/boot/dts/tegra20-acer-a500-picasso.dts
@@ -60,7 +60,19 @@ linux,cma@30000000 {
};

host1x@50000000 {
+ core-supply = <&vdd_core>;
+
+ gr2d@54140000 {
+ core-supply = <&vdd_core>;
+ };
+
+ gr3d@54180000 {
+ core-supply = <&vdd_core>;
+ };
+
dc@54200000 {
+ core-supply = <&vdd_core>;
+
rgb {
status = "okay";

@@ -73,12 +85,17 @@ lcd_output: endpoint {
};
};

+ dc@54240000 {
+ core-supply = <&vdd_core>;
+ };
+
hdmi@54280000 {
status = "okay";

vdd-supply = <&hdmi_vdd_reg>;
pll-supply = <&hdmi_pll_reg>;
hdmi-supply = <&vdd_5v0_sys>;
+ core-supply = <&vdd_core>;

nvidia,ddc-i2c-bus = <&hdmi_ddc>;
nvidia,hpd-gpio = <&gpio TEGRA_GPIO(N, 7)
@@ -86,6 +103,10 @@ hdmi@54280000 {
};
};

+ vde@6001a000 {
+ core-supply = <&vdd_core>;
+ };
+
pinmux@70000014 {
pinctrl-names = "default";
pinctrl-0 = <&state_default>;
@@ -565,7 +586,7 @@ sys_reg: sys {

vdd_core: sm0 {
regulator-name = "vdd_sm0,vdd_core";
- regulator-min-microvolt = <1200000>;
+ regulator-min-microvolt = <950000>;
regulator-max-microvolt = <1300000>;
regulator-coupled-with = <&rtc_vdd &vdd_cpu>;
regulator-coupled-max-spread = <170000 550000>;
@@ -606,7 +627,7 @@ ldo1 {

rtc_vdd: ldo2 {
regulator-name = "vdd_ldo2,vdd_rtc";
- regulator-min-microvolt = <1200000>;
+ regulator-min-microvolt = <950000>;
regulator-max-microvolt = <1300000>;
regulator-coupled-with = <&vdd_core &vdd_cpu>;
regulator-coupled-max-spread = <170000 550000>;
@@ -696,6 +717,7 @@ usb@c5000000 {
compatible = "nvidia,tegra20-udc";
status = "okay";
dr_mode = "peripheral";
+ core-supply = <&vdd_core>;
};

usb-phy@c5000000 {
@@ -709,6 +731,7 @@ usb-phy@c5000000 {

usb@c5008000 {
status = "okay";
+ core-supply = <&vdd_core>;
};

usb-phy@c5008000 {
@@ -746,6 +769,7 @@ sdmmc1: mmc@c8000000 {
non-removable;

mmc-pwrseq = <&brcm_wifi_pwrseq>;
+ core-supply = <&vdd_core>;
vmmc-supply = <&vdd_3v3_sys>;
vqmmc-supply = <&vdd_3v3_sys>;

@@ -764,6 +788,7 @@ sdmmc3: mmc@c8000400 {
bus-width = <4>;
cd-gpios = <&gpio TEGRA_GPIO(I, 5) GPIO_ACTIVE_LOW>;
power-gpios = <&gpio TEGRA_GPIO(I, 6) GPIO_ACTIVE_HIGH>;
+ core-supply = <&vdd_core>;
vmmc-supply = <&vdd_3v3_sys>;
vqmmc-supply = <&vdd_3v3_sys>;
};
@@ -771,6 +796,7 @@ sdmmc3: mmc@c8000400 {
sdmmc4: mmc@c8000600 {
status = "okay";
bus-width = <8>;
+ core-supply = <&vdd_core>;
vmmc-supply = <&vcore_emmc>;
vqmmc-supply = <&vdd_3v3_sys>;
non-removable;
--
2.27.0