linux-kernel - Re: [PATCH 7/7] arm64: dts: freescale: imx95-19x19-evk: add lpi2c[5,6] and sub-nodes

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Message-ID: <678698b1-55d2-41d5-912d-ef93d0214f88@kernel.org>
Date: Mon, 2 Sep 2024 12:23:39 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: "Peng Fan (OSS)" <peng.fan@....nxp.com>, 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>
Cc: devicetree@...r.kernel.org, imx@...ts.linux.dev,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 Peng Fan <peng.fan@....com>
Subject: Re: [PATCH 7/7] arm64: dts: freescale: imx95-19x19-evk: add
 lpi2c[5,6] and sub-nodes

On 02/09/2024 12:19, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@....com>
> 
> Add LPI2C[5,6] and the gpio expander subnodes.
> Since we are at here, also add the alias for all lpi2c and gpio nodes.
> 
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
>  arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts | 69 +++++++++++++++++++++++
>  1 file changed, 69 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts b/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts
> index 5101cd171e09..64e9caf3089e 100644
> --- a/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts
> @@ -22,6 +22,19 @@ / {
>  	compatible = "fsl,imx95-19x19-evk", "fsl,imx95";
>  
>  	aliases {
> +		gpio0 = &gpio1;
> +		gpio1 = &gpio2;
> +		gpio2 = &gpio3;
> +		gpio3 = &gpio4;
> +		gpio4 = &gpio5;
> +		i2c0 = &lpi2c1;
> +		i2c1 = &lpi2c2;
> +		i2c2 = &lpi2c3;
> +		i2c3 = &lpi2c4;
> +		i2c4 = &lpi2c5;
> +		i2c5 = &lpi2c6;
> +		i2c6 = &lpi2c7;
> +		i2c7 = &lpi2c8;
>  		mmc0 = &usdhc1;
>  		mmc1 = &usdhc2;
>  		serial0 = &lpuart1;
> @@ -241,6 +254,42 @@ i2c4_gpio_expander_21: gpio@21 {
>  	};
>  };
>  
> +&lpi2c5 {
> +	clock-frequency = <100000>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_lpi2c5>;
> +	status = "okay";
> +
> +	i2c5_pcal6408: i2c5-gpio@21 {

Node names should be generic. See also an explanation and list of
examples (not exhaustive) in DT specification:
https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation


> +		compatible = "nxp,pcal6408";
> +		reg = <0x21>;
> +		gpio-controller;
> +		#gpio-cells = <2>;
> +		vcc-supply = <&reg_3p3v>;
> +	};
> +};
> +
> +&lpi2c6 {
> +	clock-frequency = <100000>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_lpi2c6>;
> +	status = "okay";
> +
> +	i2c6_pcal6416: i2c6-gpio@21 {

Same here

Best regards,
Krzysztof