linux-kernel - Re: [PATCH V5 10/12] arm64: dts: imx8mn-evk: enable uart1

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Date:   Tue, 15 Nov 2022 11:08:05 +0100
From:   Marco Felsch <m.felsch@...gutronix.de>
To:     "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc:     shawnguo@...nel.org, s.hauer@...gutronix.de,
        Peng Fan <peng.fan@....com>, linux-kernel@...r.kernel.org,
        linux-imx@....com, kernel@...gutronix.de, festevam@...il.com,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH V5 10/12] arm64: dts: imx8mn-evk: enable uart1

On 22-11-15, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@....com>
> 
> Enable uart1 for BT usage
> Configure the clock to source from IMX8MN_SYS_PLL1_80M, because the uart
> could only support max 1.5M buadrate if using OSC_24M as clock source.
> 
> Signed-off-by: Peng Fan <peng.fan@....com>

Reviewed-by: Marco Felsch <m.felsch@...gutronix.de>

> ---
>  arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi b/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
> index 1971f095e4c2..12dc5d398a03 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
> @@ -247,6 +247,15 @@ &spdif1 {
>  	status = "okay";
>  };
>  
> +&uart1 { /* BT */
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_uart1>;
> +	assigned-clocks = <&clk IMX8MN_CLK_UART1>;
> +	assigned-clock-parents = <&clk IMX8MN_SYS_PLL1_80M>;
> +	fsl,uart-has-rtscts;
> +	status = "okay";
> +};
> +
>  &uart2 { /* console */
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_uart2>;
> @@ -440,6 +449,15 @@ MX8MN_IOMUXC_SD1_STROBE_GPIO2_IO11	0x159
>  		>;
>  	};
>  
> +	pinctrl_uart1: uart1grp {
> +		fsl,pins = <
> +			MX8MN_IOMUXC_UART1_RXD_UART1_DCE_RX	0x140
> +			MX8MN_IOMUXC_UART1_TXD_UART1_DCE_TX	0x140
> +			MX8MN_IOMUXC_UART3_RXD_UART1_DCE_CTS_B	0x140
> +			MX8MN_IOMUXC_UART3_TXD_UART1_DCE_RTS_B	0x140
> +		>;
> +	};
> +
>  	pinctrl_uart2: uart2grp {
>  		fsl,pins = <
>  			MX8MN_IOMUXC_UART2_RXD_UART2_DCE_RX	0x140
> -- 
> 2.37.1
> 
> 
>