linux-kernel - Re: [PATCH] arm64: dts: imx8mp-msc-sm2s: Add i2c{1,6} sda-/scl-gpios

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Date: Mon, 8 Apr 2024 14:44:16 +0300
From: Ian Ray <ian.ray@...ealthcare.com>
To: Fabio Estevam <festevam@...il.com>
Cc: Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        devicetree@...r.kernel.org, imx@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: imx8mp-msc-sm2s: Add i2c{1,6} sda-/scl-gpios

On Mon, Apr 08, 2024 at 08:31:53AM -0300, Fabio Estevam wrote:
> 
> Hi Ian,
> 
> > +       pinctrl_i2c1_gpio: i2c1gpiogrp {
> > +               fsl,pins =
> > +                       <MX8MP_IOMUXC_I2C1_SCL__GPIO5_IO14              0x400001c3>,
> 
> The Sion bit is unnecessary in the GPIO mode so you could pass 0x1c3 instead.

Thank you -- I will submit a V2.

Would 0x1c2 be more correct?  From the IMX8MPRM.pdf, it seems that the
lowest bit is reserved.  Example: 8.2.4.158 SW_PAD_CTL_PAD_GPIO1_IO05
SW PAD Control Register (IOMUXC_SW_PAD_CTL_PAD_GPIO1_IO05).