linux-kernel - [PATCH v1 4/7] arm64: dts: imx8qm-mek: Add vpcie3v3aux regulator for PCIe M.2 connector

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Message-Id: <20251024073152.902735-5-hongxing.zhu@nxp.com>
Date: Fri, 24 Oct 2025 15:31:49 +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 4/7] arm64: dts: imx8qm-mek: 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.MX8QM MEK board.

Signed-off-by: Richard Zhu <hongxing.zhu@....com>
---
 arch/arm64/boot/dts/freescale/imx8qm-mek.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8qm-mek.dts b/arch/arm64/boot/dts/freescale/imx8qm-mek.dts
index 202d5c67ac40b..6728e1236f4db 100644
--- a/arch/arm64/boot/dts/freescale/imx8qm-mek.dts
+++ b/arch/arm64/boot/dts/freescale/imx8qm-mek.dts
@@ -775,6 +775,7 @@ &pciea {
 	pinctrl-names = "default";
 	reset-gpio = <&lsio_gpio4 29 GPIO_ACTIVE_LOW>;
 	vpcie-supply = <&reg_pciea>;
+	vpcie3v3aux-supply = <&reg_pciea>;
 	status = "okay";
 };
 
-- 
2.37.1