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Message-ID: <20230718061541.GJ9559@dragon>
Date:   Tue, 18 Jul 2023 14:15:41 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Hugo Villeneuve <hugo@...ovil.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Hugo Villeneuve <hvilleneuve@...onoff.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: imx8mn-var-som: add missing pull-up for
 onboard PHY reset pinmux

On Tue, Jul 04, 2023 at 09:48:00AM -0400, Hugo Villeneuve wrote:
> From: Hugo Villeneuve <hvilleneuve@...onoff.com>
> 
> For SOMs with an onboard PHY, the RESET_N pull-up resistor is
> currently deactivated in the pinmux configuration. When the pinmux
> code selects the GPIO function for this pin, with a default direction
> of input, this prevents the RESET_N pin from being taken to the proper
> 3.3V level (deasserted), and this results in the PHY being not
> detected since it is held in reset.
> 
> Taken from RESET_N pin description in ADIN13000 datasheet:
>     This pin requires a 1K pull-up resistor to AVDD_3P3.
> 
> Activate the pull-up resistor to fix the issue.
> 
> Fixes: ade0176dd8a0 ("arm64: dts: imx8mn-var-som: Add Variscite VAR-SOM-MX8MN System on Module")
> Signed-off-by: Hugo Villeneuve <hvilleneuve@...onoff.com>

Applied, thanks!

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