[PATCH 2/5] arm64: dts: imx91-9x9-qsb: add pinctrl for wdog3 reset

[Joy Zou]

The wdog3 node enables fsl,ext-reset-output to assert an external
reset signal upon watchdog timeout, but lacks pinctrl configuration
for the physical pad.

Without proper pinctrl settings, which could cause the watchdog timeout
to fail to reset the board hardware.

Add pinctrl configuration to ensure the pin is properly muxed and
configured for external watchdog reset functionality.

Signed-off-by: Joy Zou <joy.zou at nxp.com>
---
 arch/arm64/boot/dts/freescale/imx91-9x9-qsb.dts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx91-9x9-qsb.dts b/arch/arm64/boot/dts/freescale/imx91-9x9-qsb.dts
index 9cbfe57be2d3c37208611dfba5acd428f0b58c3e..62549a6de1b64496ffa5cf3f543145a00dbb10a8 100644
--- a/arch/arm64/boot/dts/freescale/imx91-9x9-qsb.dts
+++ b/arch/arm64/boot/dts/freescale/imx91-9x9-qsb.dts
@@ -230,6 +230,12 @@ MX91_PAD_SD2_DATA3__USDHC2_DATA3                        0x13fe
 			MX91_PAD_SD2_VSELECT__USDHC2_VSELECT                    0x51e
 		>;
 	};
+
+	pinctrl_wdog: wdoggrp {
+		fsl,pins = <
+			MX91_PAD_WDOG_ANY__WDOG1_WDOG_ANY	0x31e
+		>;
+	};
 };
 
 &lpi2c1 {
@@ -419,6 +425,8 @@ &usdhc2 {
 };
 
 &wdog3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_wdog>;
 	fsl,ext-reset-output;
 	status = "okay";
 };

-- 
2.37.1