linux-kernel - Re: [PATCH] arm64: dts: freescale: imx93-phycore-som: Fix watchdog reset

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Message-ID: <aFrr1SWLbedBXot7@lizhi-Precision-Tower-5810>
Date: Tue, 24 Jun 2025 14:17:57 -0400
From: Frank Li <Frank.li@....com>
To: Primoz Fiser <primoz.fiser@...ik.com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, devicetree@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, upstream@...ts.phytec.de
Subject: Re: [PATCH] arm64: dts: freescale: imx93-phycore-som: Fix watchdog
 reset

On Tue, Jun 24, 2025 at 08:13:23AM +0200, Primoz Fiser wrote:

subject: It is not fix. suggested

"add watchdog ext-reset-output pin"

> On phyCORE-i.MX93 SoM, the SoC WDOG_ANY output line is connected to the
> external pca9451a PMIC WDOG_B input. Apply pinctrl and set the property
> "fsl,ext-reset-output" for watchdog to trigger board reset via PMIC on
> timeout/reset.
>
> Signed-off-by: Primoz Fiser <primoz.fiser@...ik.com>
> ---
>  arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi | 9 +++++++++
>  1 file changed, 9 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi b/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi
> index 5ee52774e7bf..729c26f9ac94 100644
> --- a/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi
> @@ -191,6 +191,9 @@ &usdhc1 {
>
>  /* Watchdog */
>  &wdog3 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_wdog>;
> +	fsl,ext-reset-output;
>  	status = "okay";
>  };
>
> @@ -279,4 +282,10 @@ MX93_PAD_SD1_DATA7__USDHC1_DATA7	0x400013be
>  			MX93_PAD_SD1_STROBE__USDHC1_STROBE	0x179e
>  		>;
>  	};
> +
> +	pinctrl_wdog: wdoggrp {
> +		fsl,pins = <
> +			MX93_PAD_WDOG_ANY__WDOG1_WDOG_ANY	0x31e
> +		>;
> +	};
>  };
> --
> 2.34.1
>