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Date:   Mon, 12 Oct 2020 15:04:40 +0200
From:   Krzysztof Kozlowski <krzk@kernel.org>
To:     Anson Huang <Anson.Huang@nxp.com>
Cc:     robh+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de,
        kernel@pengutronix.de, festevam@gmail.com, aford173@gmail.com,
        daniel.baluta@nxp.com, shengjiu.wang@nxp.com, peter.chen@nxp.com,
        alifer.wsdm@gmail.com, abel.vesa@nxp.com, yibin.gong@nxp.com,
        jun.li@nxp.com, l.stach@pengutronix.de, devicetree@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        Linux-imx@nxp.com
Subject: Re: [PATCH V2 1/3] arm64: dts: imx8mm: Correct WDOG_B pin
 configuration
Message-ID: <20201012130440.GA6468@kozik-lap>
References: <1602506642-5262-1-git-send-email-Anson.Huang@nxp.com>
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On Mon, Oct 12, 2020 at 08:44:00PM +0800, Anson Huang wrote:
> Different revision of i.MX8MM EVK boards may have different external
> pull up registor design, some are enabled while some are NOT, to make
> sure the WDOG_B pin works properly, better to enable internal pull up
> resistor. Since enabling internal pull up resistor is NOT harmful and
> having benefit of flexibility on different board design, just enable
> it for all i.MX8MM boards; And schmitt input is NOT necessary for this
> WDOG_B output pin, so remove it; Open drain outputs provide more
> flexibility to a designer as they can be pulled-up to any voltage found
> in the system, so enable it as well.
> 
> Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
> ---
> Changes since V1:
> 	- Provide more explanation of removing schmitt input and enabling open drain in commit msg.
> ---
>  arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi | 2 +-
>  arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi        | 2 +-
>  arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi    | 2 +-
>  3 files changed, 3 insertions(+), 3 deletions(-)

Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>

Best regards,
Krzysztof