linux-kernel - Re: [PATCH V2 3/7] ARM: dts: imx6sx-nitrogen6sx: Use new pin names with DCE/DTE for UART pins

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Date:   Mon, 17 Feb 2020 09:35:12 +0100
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Anson Huang <Anson.Huang@....com>
Cc:     robh+dt@...nel.org, mark.rutland@....com, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Linux-imx@....com
Subject: Re: [PATCH V2 3/7] ARM: dts: imx6sx-nitrogen6sx: Use new pin names
 with DCE/DTE for UART pins

On Sat, Feb 15, 2020 at 01:15:54PM +0800, Anson Huang wrote:
> Use new pin names containing DCE/DTE for UART RX/TX/RTS/CTS pins, this
> is to distinguish the DCE/DTE functions.
> 
> Signed-off-by: Anson Huang <Anson.Huang@....com>
> ---
>  arch/arm/boot/dts/imx6sx-nitrogen6sx.dts | 20 ++++++++++----------
>  1 file changed, 10 insertions(+), 10 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/imx6sx-nitrogen6sx.dts b/arch/arm/boot/dts/imx6sx-nitrogen6sx.dts
> index 832b5c5..d84ea69 100644
> --- a/arch/arm/boot/dts/imx6sx-nitrogen6sx.dts
> +++ b/arch/arm/boot/dts/imx6sx-nitrogen6sx.dts
> @@ -484,31 +484,31 @@
>  
>  	pinctrl_uart1: uart1grp {
>  		fsl,pins = <
> -			MX6SX_PAD_GPIO1_IO04__UART1_TX		0x1b0b1
> -			MX6SX_PAD_GPIO1_IO05__UART1_RX		0x1b0b1
> +			MX6SX_PAD_GPIO1_IO04__UART1_DCE_TX		0x1b0b1
> +			MX6SX_PAD_GPIO1_IO05__UART1_DCE_RX		0x1b0b1
>  		>;
>  	};
>  
>  	pinctrl_uart2: uart2grp {
>  		fsl,pins = <
> -			MX6SX_PAD_GPIO1_IO06__UART2_TX		0x1b0b1
> -			MX6SX_PAD_GPIO1_IO07__UART2_RX		0x1b0b1
> +			MX6SX_PAD_GPIO1_IO06__UART2_DCE_TX		0x1b0b1
> +			MX6SX_PAD_GPIO1_IO07__UART2_DCE_RX		0x1b0b1
>  		>;
>  	};
>  
>  	pinctrl_uart3: uart3grp {
>  		fsl,pins = <
> -			MX6SX_PAD_QSPI1B_SS0_B__UART3_TX	0x1b0b1
> -			MX6SX_PAD_QSPI1B_SCLK__UART3_RX		0x1b0b1
> +			MX6SX_PAD_QSPI1B_SS0_B__UART3_DCE_TX		0x1b0b1
> +			MX6SX_PAD_QSPI1B_SCLK__UART3_DCE_RX		0x1b0b1

While reviewing this patch I noticed that the user of this pinctrl group
has the property uart-has-rtscts which seems wrong.

>  		>;
>  	};
>  
>  	pinctrl_uart5: uart5grp {
>  		fsl,pins = <
> -			MX6SX_PAD_KEY_COL3__UART5_TX		0x1b0b1
> -			MX6SX_PAD_KEY_ROW3__UART5_RX		0x1b0b1
> -			MX6SX_PAD_SD3_DATA6__UART3_RTS_B	0x1b0b1
> -			MX6SX_PAD_SD3_DATA7__UART3_CTS_B	0x1b0b1
> +			MX6SX_PAD_KEY_COL3__UART5_DCE_TX		0x1b0b1
> +			MX6SX_PAD_KEY_ROW3__UART5_DCE_RX		0x1b0b1
> +			MX6SX_PAD_SD3_DATA6__UART3_DCE_RTS		0x1b0b1
> +			MX6SX_PAD_SD3_DATA7__UART3_DCE_CTS		0x1b0b1

While the property is missing in &uart5.

But the patch is fine, so:

Reviewed-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |