linux-kernel - Re: [PATCH] arm64: dts: imx8mp-evk: add support for I2C5

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Date:   Mon, 21 Feb 2022 11:20:46 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Hugo Villeneuve <hugo@...ovil.com>
Cc:     Rob Herring <robh+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>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: imx8mp-evk: add support for I2C5

On Fri, Feb 11, 2022 at 10:38:43AM -0500, Hugo Villeneuve wrote:
> From: Hugo Villeneuve <hvilleneuve@...onoff.com>
> 
> Add support for i2c5, which is used to access the
> external I2C bus on connector J22 of the imx8mp-evk.
> 
> Limit the speed to 100kHz since this is an external I2C bus.
> 
> Disabled by default, since it is shared with the CAN1 bus.
> 
> To enable i2c5, you need to disable the CAN1 function, enable the i2c5
> function and also configure the CAN1/I2C5_SEL GPIO to HIGH to
> select i2c5 instead of CAN1. This can be done by defining a gpio-hog
> inside the pca6416 node, in your board device tree, like in this example:
> 
> &flexcan1 {
> 	status = "disabled";
> };
> 
> &i2c5 {
> 	status = "okay";
> };
> 
> &pca6416 {
> 	can1-i2c5-sel-hog {
> 		gpio-hog;
> 		gpios = <2 GPIO_ACTIVE_HIGH>;
> 		output-high;
> 		line-name = "can1-i2c5-sel";
> 	};
> };
> 
> Signed-off-by: Hugo Villeneuve <hvilleneuve@...onoff.com>

Applied, thanks!