linux-kernel - [PATCH v1 7/7] arm64: dts: imx95-19x19-evk: Add vpcie3v3aux regulator for PCIe[0,1]

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Message-Id: <20251024073152.902735-8-hongxing.zhu@nxp.com>
Date: Fri, 24 Oct 2025 15:31:52 +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 7/7] arm64: dts: imx95-19x19-evk: Add vpcie3v3aux regulator for PCIe[0,1]

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(PCIe0) on i.MX95 19x19 EVK board.

PCIe1 uses one standard PCIe slot connector, but combines the +3.3v and
+3.3Vaux into a same 3.3v power source, and intends to let it always on.
Add vpcie3v3aux regulator to let this 3.3 V power source always on for
PCIe1 on i.MX95 19x19 EVK board too.

Signed-off-by: Richard Zhu <hongxing.zhu@....com>
---
 arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts b/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts
index 9f968feccef67..65d1a48906993 100644
--- a/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts
@@ -542,6 +542,7 @@ &pcie0 {
 	pinctrl-names = "default";
 	reset-gpio = <&i2c7_pcal6524 5 GPIO_ACTIVE_LOW>;
 	vpcie-supply = <&reg_pcie0>;
+	vpcie3v3aux-supply = <&reg_pcie0>;
 	status = "okay";
 };
 
@@ -557,6 +558,7 @@ &pcie1 {
 	pinctrl-names = "default";
 	reset-gpio = <&i2c7_pcal6524 16 GPIO_ACTIVE_LOW>;
 	vpcie-supply = <&reg_slot_pwr>;
+	vpcie3v3aux-supply = <&reg_slot_pwr>;
 	status = "okay";
 };
 
-- 
2.37.1