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

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Date:   Thu,  5 Nov 2020 02:44:25 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Peter Chen <Peter.Chen@....com>,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Lee Jones <lee.jones@...aro.org>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Peter Geis <pgwipeout@...il.com>,
        Nicolas Chauvet <kwizart@...il.com>
Cc:     linux-samsung-soc@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-usb@...r.kernel.org, linux-pwm@...r.kernel.org,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-media@...r.kernel.org, linux-tegra@...r.kernel.org
Subject: [PATCH v1 28/30] ARM: tegra: acer-a500: Add voltage supplies to DVFS-capable devices

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@...il.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@...00000 {
 	};
 
 	host1x@...00000 {
+		core-supply = <&vdd_core>;
+
+		gr2d@...40000 {
+			core-supply = <&vdd_core>;
+		};
+
+		gr3d@...80000 {
+			core-supply = <&vdd_core>;
+		};
+
 		dc@...00000 {
+			core-supply = <&vdd_core>;
+
 			rgb {
 				status = "okay";
 
@@ -73,12 +85,17 @@ lcd_output: endpoint {
 			};
 		};
 
+		dc@...40000 {
+			core-supply = <&vdd_core>;
+		};
+
 		hdmi@...80000 {
 			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@...80000 {
 		};
 	};
 
+	vde@...1a000 {
+		core-supply = <&vdd_core>;
+	};
+
 	pinmux@...00014 {
 		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@...00000 {
 		compatible = "nvidia,tegra20-udc";
 		status = "okay";
 		dr_mode = "peripheral";
+		core-supply = <&vdd_core>;
 	};
 
 	usb-phy@...00000 {
@@ -709,6 +731,7 @@ usb-phy@...00000 {
 
 	usb@...08000 {
 		status = "okay";
+		core-supply = <&vdd_core>;
 	};
 
 	usb-phy@...08000 {
@@ -746,6 +769,7 @@ sdmmc1: mmc@...00000 {
 		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@...00400 {
 		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@...00400 {
 	sdmmc4: mmc@...00600 {
 		status = "okay";
 		bus-width = <8>;
+		core-supply = <&vdd_core>;
 		vmmc-supply = <&vcore_emmc>;
 		vqmmc-supply = <&vdd_3v3_sys>;
 		non-removable;
-- 
2.27.0