linux-kernel - Re: [PATCH 2/2] ARM: dts: Change WDOG_ANY signal from push-pull to open-drain

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Date:   Tue, 23 Jun 2020 11:40:34 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Schrempf Frieder <frieder.schrempf@...tron.de>
Cc:     Fabio Estevam <festevam@...il.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Rob Herring <robh@...nel.org>
Subject: Re: [PATCH 2/2] ARM: dts: Change WDOG_ANY signal from push-pull to
 open-drain

On Thu, May 28, 2020 at 02:43:43PM +0000, Schrempf Frieder wrote:
> From: Frieder Schrempf <frieder.schrempf@...tron.de>
> 
> The WDOG_ANY signal is connected to the RESET_IN signal of the SoM
> and baseboard. It is currently configured as push-pull, which means
> that if some external device like a programmer wants to assert the
> RESET_IN signal by pulling it to ground, it drives against the high
> level WDOG_ANY output of the SoC.
> 
> To fix this we set the WDOG_ANY signal to open-drain configuration.
> That way we make sure that the RESET_IN can be asserted by the
> watchdog as well as by external devices.
> 
> Fixes: 1ea4b76cdfde ("ARM: dts: imx6ul-kontron-n6310: Add Kontron i.MX6UL N6310 SoM and boards")
> Cc: stable@...r.kernel.org
> Signed-off-by: Frieder Schrempf <frieder.schrempf@...tron.de>

Added 'imx6ul-kontron:' to subject and applied both patches.

Shawn