linux-kernel - [PATCH 1/3] arm64: dts: imx8mp-evk: Enable pull select bit for PCIe regulator GPIO (M.2 W

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Message-Id: <20260204023204.2382433-2-sherry.sun@nxp.com>
Date: Wed,  4 Feb 2026 10:32:02 +0800
From: Sherry Sun <sherry.sun@....com>
To: robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	Frank.Li@....com,
	s.hauer@...gutronix.de,
	festevam@...il.com
Cc: imx@...ts.linux.dev,
	kernel@...gutronix.de,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 1/3] arm64: dts: imx8mp-evk: Enable pull select bit for PCIe regulator GPIO (M.2 W_DISABLE1)

The current pin configuration for MX8MP_IOMUXC_SD1_DATA4__GPIO2_IO06
sets the weak pull-up but does not enable the pull select field.
Bit 8 in the IOMUX register must be set in order for the weak pull-up
to actually take effect.

Update the pinctrl setting from 0x40 to 0x140 to enable both the pull
select and the weak pull-up, ensuring the line behaves as expected.

Signed-off-by: Sherry Sun <sherry.sun@....com>
---
 arch/arm64/boot/dts/freescale/imx8mp-evk.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
index 3f9b3fab8ac3..a1269c7a6cc2 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
@@ -1069,7 +1069,7 @@ MX8MP_IOMUXC_SD1_DATA5__GPIO2_IO07	0x40
 
 	pinctrl_pcie0_reg: pcie0reggrp {
 		fsl,pins = <
-			MX8MP_IOMUXC_SD1_DATA4__GPIO2_IO06	0x40
+			MX8MP_IOMUXC_SD1_DATA4__GPIO2_IO06	0x140
 		>;
 	};
 
-- 
2.37.1