linux-kernel - [PATCH v1 6/7] arm64: dts: imx95-15x15-evk: Add vpcie3v3aux regulator for PCIe M.2 connector

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Message-Id: <20251024073152.902735-7-hongxing.zhu@nxp.com>
Date: Fri, 24 Oct 2025 15:31:51 +0800
From: Richard Zhu <hongxing.zhu@....com>
To: robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	shawnguo@...nel.org,
	frank.li@....com,
	s.hauer@...gutronix.de,
	festevam@...il.com
Cc: kernel@...gutronix.de,
	devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Richard Zhu <hongxing.zhu@....com>
Subject: [PATCH v1 6/7] arm64: dts: imx95-15x15-evk: Add vpcie3v3aux regulator for PCIe M.2 connector

Refer to PCI Express M.2 Specification r5.1 sec3.1.1 Power Sources and
Grounds.

PCI Express M.2 Socket 1 utilizes a 3.3 V power source. The voltage
source, 3.3 V, is expected to be available during the system’s
stand-by/suspend state to support wake event processing on the
communications card.

Add vpcie3v3aux regulator to let this 3.3 V power source always on for
PCIe M.2 Key E connector on i.MX95 15x15 EVK board.

Signed-off-by: Richard Zhu <hongxing.zhu@....com>
---
 arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts b/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts
index 148243470dd4a..3cd8ab556c330 100644
--- a/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts
@@ -556,6 +556,7 @@ &pcie0 {
 	pinctrl-names = "default";
 	reset-gpio = <&gpio5 13 GPIO_ACTIVE_LOW>;
 	vpcie-supply = <&reg_m2_pwr>;
+	vpcie3v3aux-supply = <&reg_m2_pwr>;
 	status = "okay";
 };
 
-- 
2.37.1