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    Subject[PATCH 5.18 002/141] arm64: dts: imx8mm-beacon: Enable RTS-CTS on UART3
    Date
    From: Adam Ford <aford173@gmail.com>

    commit 4ce01ce36d77137cf60776b320babed89de6bd4c upstream.

    There is a header for a DB9 serial port, but any attempts to use
    hardware handshaking fail. Enable RTS and CTS pin muxing and enable
    handshaking in the uart node.

    Signed-off-by: Adam Ford <aford173@gmail.com>
    Signed-off-by: Shawn Guo <shawnguo@kernel.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi | 3 +++
    1 file changed, 3 insertions(+)

    --- a/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
    +++ b/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
    @@ -278,6 +278,7 @@
    pinctrl-0 = <&pinctrl_uart3>;
    assigned-clocks = <&clk IMX8MM_CLK_UART3>;
    assigned-clock-parents = <&clk IMX8MM_SYS_PLL1_80M>;
    + uart-has-rtscts;
    status = "okay";
    };

    @@ -386,6 +387,8 @@
    fsl,pins = <
    MX8MM_IOMUXC_ECSPI1_SCLK_UART3_DCE_RX 0x40
    MX8MM_IOMUXC_ECSPI1_MOSI_UART3_DCE_TX 0x40
    + MX8MM_IOMUXC_ECSPI1_MISO_UART3_DCE_CTS_B 0x40
    + MX8MM_IOMUXC_ECSPI1_SS0_UART3_DCE_RTS_B 0x40
    >;
    };


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