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arm64: dts: imx8mn-beacon: Enable RTS-CTS on UART3

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commit 5446ff1a67160ad92d9aae9530846aa54750be36 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>
This commit is contained in:
Adam Ford
2022-04-26 15:51:44 -05:00
committed by Greg Kroah-Hartman
parent 5628b9febd
commit 9cada4a06d
1 changed files with 3 additions and 0 deletions
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3
arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi
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@@ -176,6 +176,7 @@
pinctrl-0 = <&pinctrl_uart3>;
assigned-clocks = <&clk IMX8MN_CLK_UART3>;
assigned-clock-parents = <&clk IMX8MN_SYS_PLL1_80M>;
uart-has-rtscts;
status = "okay";
};
@@ -259,6 +260,8 @@
fsl,pins = <
MX8MN_IOMUXC_ECSPI1_SCLK_UART3_DCE_RX 0x40
MX8MN_IOMUXC_ECSPI1_MOSI_UART3_DCE_TX 0x40
MX8MN_IOMUXC_ECSPI1_MISO_UART3_DCE_CTS_B 0x40
MX8MN_IOMUXC_ECSPI1_SS0_UART3_DCE_RTS_B 0x40
>;
};