linux-kernel - Re: [PATCH 2/3] arm64: dts: imx8dxl-evk: add i2c3 and its children nodes

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Date: Tue, 30 Jan 2024 09:03:50 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Frank Li <Frank.Li@....com>, Rob Herring <robh+dt@...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>,
 Fabio Estevam <festevam@...il.com>, NXP Linux Team <linux-imx@....com>,
 "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
 <devicetree@...r.kernel.org>,
 "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
 <linux-arm-kernel@...ts.infradead.org>,
 open list <linux-kernel@...r.kernel.org>
Cc: imx@...ts.linux.dev
Subject: Re: [PATCH 2/3] arm64: dts: imx8dxl-evk: add i2c3 and its children
 nodes

On 29/01/2024 23:14, Frank Li wrote:
> Add i2c3 bus node. Add i2c gpio expandor pca6416 and i2c mux pca9548.
> 
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
>  arch/arm64/boot/dts/freescale/imx8dxl-evk.dts | 55 +++++++++++++++++++
>  1 file changed, 55 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8dxl-evk.dts b/arch/arm64/boot/dts/freescale/imx8dxl-evk.dts
> index b972658efb176..d313cf1dd79d5 100644
> --- a/arch/arm64/boot/dts/freescale/imx8dxl-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8dxl-evk.dts
> @@ -261,6 +261,61 @@ i2c@6 {
>  	};
>  };
>  
> +&i2c3 {
> +	#address-cells = <1>;
> +	#size-cells = <0>;
> +	clock-frequency = <100000>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_i2c3>;
> +	status = "okay";
> +
> +	pca6416_3: gpio@20 {
> +		compatible = "ti,tca6416";
> +		reg = <0x20>;
> +		gpio-controller;
> +		#gpio-cells = <2>;
> +		interrupt-parent = <&lsio_gpio2>;
> +		interrupts = <5 IRQ_TYPE_EDGE_RISING>;
> +	};
> +
> +	pca9548_2: i2c-mux@70 {
> +		compatible = "nxp,pca9548";
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +		reg = <0x70>;

reg is always the second property.

https://www.kernel.org/doc/html/latest/devicetree/bindings/dts-coding-style.html#order-of-properties-in-device-node



Best regards,
Krzysztof