linux-kernel - Re: [PATCH v3 4/4] dts: arm64: imx8dxl-evk: add lpuart1 and cm40 uart

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Message-ID: <Zga1Eb+46Uua/jJi@dragon>
Date: Fri, 29 Mar 2024 20:33:21 +0800
From: Shawn Guo <shawnguo2@...h.net>
To: Frank Li <Frank.Li@....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>,
	Fabio Estevam <festevam@...il.com>, devicetree@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 4/4] dts: arm64: imx8dxl-evk: add lpuart1 and cm40 uart

On Tue, Mar 05, 2024 at 10:54:58AM -0500, Frank Li wrote:
> Add lpuart1 and cm40 uart.
> 
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
>  arch/arm64/boot/dts/freescale/imx8dxl-evk.dts | 37 +++++++++++++++++++++++++++
>  1 file changed, 37 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8dxl-evk.dts b/arch/arm64/boot/dts/freescale/imx8dxl-evk.dts
> index 2123d431e0613..737bacacc2da1 100644
> --- a/arch/arm64/boot/dts/freescale/imx8dxl-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8dxl-evk.dts
> @@ -16,6 +16,8 @@ aliases {
>  		mmc0 = &usdhc1;
>  		mmc1 = &usdhc2;
>  		serial0 = &lpuart0;
> +		serial1 = &lpuart1;
> +		serial6 = &cm40_lpuart;
>  	};
>  
>  	chosen {
> @@ -51,6 +53,16 @@ linux,cma {
>  		};
>  	};
>  
> +	m2_uart1_sel: fixedregulator-101 {

Why do we not name the node regulator-xxx just like other fixed
regulators?  Also not sure what suffix -101 means.  Can we name it like
regulator-m2uart1sel or something?

Shawn

> +		compatible = "regulator-fixed";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-name = "m2_uart1_sel";
> +		gpio = <&pca6416_1 6 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +		regulator-always-on;
> +	};
> +
>  	mux3_en: regulator-0 {
>  		compatible = "regulator-fixed";
>  		regulator-min-microvolt = <3300000>;
> @@ -340,6 +352,12 @@ &lpuart0 {
>  	status = "okay";
>  };
>  
> +&lpuart1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_lpuart1>;
> +	status = "okay";
> +};
> +
>  &flexcan2 {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_flexcan2>;
> @@ -354,6 +372,16 @@ &flexcan3 {
>  	status = "okay";
>  };
>  
> +&cm40_intmux {
> +	status = "disabled";
> +};
> +
> +&cm40_lpuart {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_cm40_lpuart>;
> +	status = "disabled";
> +};
> +
>  &lsio_gpio4 {
>  	status = "okay";
>  };
> @@ -595,6 +623,15 @@ IMX8DXL_UART0_TX_ADMA_UART0_TX		0x06000020
>  		>;
>  	};
>  
> +	pinctrl_lpuart1: lpuart1grp {
> +		fsl,pins = <
> +			IMX8DXL_UART1_TX_ADMA_UART1_TX          0x06000020
> +			IMX8DXL_UART1_RX_ADMA_UART1_RX          0x06000020
> +			IMX8DXL_UART1_RTS_B_ADMA_UART1_RTS_B    0x06000020
> +			IMX8DXL_UART1_CTS_B_ADMA_UART1_CTS_B    0x06000020
> +		>;
> +	};
> +
>  	pinctrl_usdhc1: usdhc1grp {
>  		fsl,pins = <
>  			IMX8DXL_EMMC0_CLK_CONN_EMMC0_CLK	0x06000041
> 
> -- 
> 2.34.1
>