linux-kernel - Re: [PATCH 3/4] arm64: dts: imx8mp-phyboard-pollux: Enable i2c3

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Message-ID: <aPZXaC8HL+Rg7rax@lizhi-Precision-Tower-5810>
Date: Mon, 20 Oct 2025 11:38:16 -0400
From: Frank Li <Frank.li@....com>
To: Yannic Moog <y.moog@...tec.de>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, upstream@...ts.phytec.de,
	devicetree@...r.kernel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Stefan Riedmueller <s.riedmueller@...tec.de>,
	Teresa Remmet <t.remmet@...tec.de>
Subject: Re: [PATCH 3/4] arm64: dts: imx8mp-phyboard-pollux: Enable i2c3

On Mon, Oct 20, 2025 at 03:11:24PM +0200, Yannic Moog wrote:
> From: Stefan Riedmueller <s.riedmueller@...tec.de>
>
> On the phyBOARD-Pollux the i2c3 node is used on the CSI1 interface to
> connect to imaging sensors. Thus define it so it can be easily enabled if
> required.
Nit:

The i2c3 of the phyBOARD-Pollux is used ...

Reviewed-by: Frank Li <Frank.Li@....com>

>
> Signed-off-by: Stefan Riedmueller <s.riedmueller@...tec.de>
> Signed-off-by: Teresa Remmet <t.remmet@...tec.de>
> Signed-off-by: Yannic Moog <y.moog@...tec.de>
> ---
>  .../dts/freescale/imx8mp-phyboard-pollux-rdk.dts   | 23 ++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-rdk.dts b/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-rdk.dts
> index 6203e39bc01be476f16f5ac80b6365bce150ae37..7d34b820e3213a3832c5be47444d4e9c636a6202 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-rdk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-rdk.dts
> @@ -228,6 +228,15 @@ led-3 {
>  	};
>  };
>
> +&i2c3 {
> +	clock-frequency = <400000>;
> +	pinctrl-names = "default", "gpio";
> +	pinctrl-0 = <&pinctrl_i2c3>;
> +	pinctrl-1 = <&pinctrl_i2c3_gpio>;
> +	sda-gpios = <&gpio5 18 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
> +	scl-gpios = <&gpio5 19 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
> +};
> +
>  &ldb_lvds_ch1 {
>  	remote-endpoint = <&panel1_in>;
>  };
> @@ -442,6 +451,20 @@ MX8MP_IOMUXC_I2C2_SDA__GPIO5_IO17	0x1e2
>  		>;
>  	};
>
> +	pinctrl_i2c3: i2c3grp {
> +		fsl,pins = <
> +			MX8MP_IOMUXC_I2C3_SCL__I2C3_SCL		0x400001c2
> +			MX8MP_IOMUXC_I2C3_SDA__I2C3_SDA		0x400001c2
> +		>;
> +	};
> +
> +	pinctrl_i2c3_gpio: i2c3gpiogrp {
> +		fsl,pins = <
> +			MX8MP_IOMUXC_I2C3_SCL__GPIO5_IO18	0x1e2
> +			MX8MP_IOMUXC_I2C3_SDA__GPIO5_IO19	0x1e2
> +		>;
> +	};
> +
>  	pinctrl_lvds1: lvds1grp {
>  		fsl,pins = <
>  			MX8MP_IOMUXC_SD2_WP__GPIO2_IO20		0x12
>
> --
> 2.51.0
>