linux-kernel - [PATCH v2 1/4] ARM: dts: aspeed: nvidia: gb200nvl: Add VCC Supply

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Message-ID: <20250716-update-gb200nvl-dts-for-new-hardware-v2-1-9a1a916f461d@nvidia.com>
Date: Wed, 16 Jul 2025 18:21:55 +0000
From: Willie Thai <wthai@...dia.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Joel Stanley <joel@....id.au>, "Andrew
 Jeffery" <andrew@...econstruct.com.au>, <openbmc@...ts.ozlabs.org>
CC: <devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-aspeed@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>, "Deepak
 Kodihalli" <dkodihalli@...dia.com>, Ed Tanous <etanous@...dia.com>, Leo Huang
	<leohu@...dia.com>, Willie Thai <wthai@...dia.com>
Subject: [PATCH v2 1/4] ARM: dts: aspeed: nvidia: gb200nvl: Add VCC Supply

Add Vcc supply to avoid probing the devices before they have power.

Signed-off-by: Deepak Kodihalli <dkodihalli@...dia.com>
Signed-off-by: Ed Tanous <etanous@...dia.com>
Signed-off-by: Willie Thai <wthai@...dia.com>
---
Changes v1 -> v2:
   - Fix unevaluated vcc-supply properties [Rob Herring]
---
---
 .../dts/aspeed/aspeed-bmc-nvidia-gb200nvl-bmc.dts  | 26 ++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-nvidia-gb200nvl-bmc.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-nvidia-gb200nvl-bmc.dts
index 41e3e9dd85f571254a08d40e68c0d8f8f049256b..bd9395a194137ea70d184665ad6cb659541ef175 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-nvidia-gb200nvl-bmc.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-nvidia-gb200nvl-bmc.dts
@@ -126,6 +126,17 @@ button-uid {
 			gpio = <&sgpiom0 154 GPIO_ACTIVE_LOW>;
 		};
 	};
+
+	standby_power_regulator: standby-power-regulator {
+		status = "okay";
+		compatible = "regulator-fixed";
+		regulator-name = "standby_power";
+		gpio = <&gpio0 ASPEED_GPIO(M, 3) GPIO_ACTIVE_HIGH>;
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		enable-active-high;
+		regulator-always-on;
+	};
 };
 
 // Enable Primary flash on FMC for bring up activity
@@ -431,6 +442,7 @@ exp4: gpio@21 {
 		#interrupt-cells = <2>;
 		interrupt-parent = <&gpio1>;
 		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		vcc-supply = <&standby_power_regulator>;
 		gpio-line-names =
 			"RTC_MUX_SEL-O",
 			"PCI_MUX_SEL-O",
@@ -464,6 +476,7 @@ i2c-mux@71 {
 		#size-cells = <0>;
 		reg = <0x71>;
 		i2c-mux-idle-disconnect;
+		vdd-supply = <&standby_power_regulator>;
 
 		imux16: i2c@0 {
 			#address-cells = <1>;
@@ -528,6 +541,7 @@ i2c-mux@72 {
 		#size-cells = <0>;
 		reg = <0x72>;
 		i2c-mux-idle-disconnect;
+		vdd-supply = <&standby_power_regulator>;
 
 		imux20: i2c@0 {
 			#address-cells = <1>;
@@ -545,6 +559,7 @@ gpio@21 {
 				reg = <0x21>;
 				gpio-controller;
 				#gpio-cells = <2>;
+				vcc-supply = <&standby_power_regulator>;
 				gpio-line-names =
 					"RST_CX_0_L-O",
 					"RST_CX_1_L-O",
@@ -584,6 +599,7 @@ i2c-mux@73 {
 		#size-cells = <0>;
 		reg = <0x73>;
 		i2c-mux-idle-disconnect;
+		vdd-supply = <&standby_power_regulator>;
 
 		imux24: i2c@0 {
 			#address-cells = <1>;
@@ -602,6 +618,7 @@ i2c-mux@70 {
 				#size-cells = <0>;
 				reg = <0x70>;
 				i2c-mux-idle-disconnect;
+				vdd-supply = <&standby_power_regulator>;
 
 				i2c25mux0: i2c@0 {
 					#address-cells = <1>;
@@ -648,6 +665,7 @@ i2c-mux@75 {
 		#size-cells = <0>;
 		reg = <0x75>;
 		i2c-mux-idle-disconnect;
+		vdd-supply = <&standby_power_regulator>;
 
 		imux28: i2c@0 {
 			#address-cells = <1>;
@@ -712,6 +730,7 @@ i2c-mux@76 {
 		#size-cells = <0>;
 		reg = <0x76>;
 		i2c-mux-idle-disconnect;
+		vdd-supply = <&standby_power_regulator>;
 
 		imux32: i2c@0 {
 			#address-cells = <1>;
@@ -729,6 +748,7 @@ gpio@21 {
 				reg = <0x21>;
 				gpio-controller;
 				#gpio-cells = <2>;
+				vcc-supply = <&standby_power_regulator>;
 				gpio-line-names =
 					"SEC_RST_CX_0_L-O",
 					"SEC_RST_CX_1_L-O",
@@ -768,6 +788,7 @@ i2c-mux@77 {
 		#size-cells = <0>;
 		reg = <0x77>;
 		i2c-mux-idle-disconnect;
+		vdd-supply = <&standby_power_regulator>;
 
 		imux36: i2c@0 {
 			#address-cells = <1>;
@@ -862,6 +883,7 @@ exp0: gpio@20 {
 		#interrupt-cells = <2>;
 		interrupt-parent = <&gpio1>;
 		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		vcc-supply = <&standby_power_regulator>;
 		gpio-line-names =
 			"FPGA_THERM_OVERT_L-I",
 			"FPGA_READY_BMC-I",
@@ -891,6 +913,7 @@ exp1: gpio@21 {
 		#interrupt-cells = <2>;
 		interrupt-parent = <&gpio1>;
 		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		vcc-supply = <&standby_power_regulator>;
 		gpio-line-names =
 			"SEC_FPGA_THERM_OVERT_L-I",
 			"SEC_FPGA_READY_BMC-I",
@@ -949,6 +972,7 @@ exp3: gpio@74 {
 		#interrupt-cells = <2>;
 		interrupt-parent = <&gpio1>;
 		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		vcc-supply = <&standby_power_regulator>;
 		gpio-line-names =
 			"IOB_PRSNT_L",
 			"IOB_DP_HPD",
@@ -1014,6 +1038,7 @@ i2c-mux@77 {
 		#size-cells = <0>;
 		reg = <0x77>;
 		i2c-mux-idle-disconnect;
+		vdd-supply = <&standby_power_regulator>;
 
 		e1si2c0: i2c@0 {
 			#address-cells = <1>;
@@ -1054,6 +1079,7 @@ i2c-mux@77 {
 		#size-cells = <0>;
 		reg = <0x77>;
 		i2c-mux-idle-disconnect;
+		vdd-supply = <&standby_power_regulator>;
 
 		e1si2c4: i2c@0 {
 			#address-cells = <1>;

-- 
2.25.1