[PATCH 5.15 003/106] arm64: dts: imx8mm-beacon: Enable RTS-CTS on UART3

From: Greg Kroah-Hartman
Date: Mon Jun 20 2022 - 09:21:42 EST


From: Adam Ford <aford173@xxxxxxxxx>

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@xxxxxxxxx>
Signed-off-by: Shawn Guo <shawnguo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -166,6 +166,7 @@
pinctrl-0 = <&pinctrl_uart3>;
assigned-clocks = <&clk IMX8MM_CLK_UART3>;
assigned-clock-parents = <&clk IMX8MM_SYS_PLL1_80M>;
+ uart-has-rtscts;
status = "okay";
};

@@ -236,6 +237,8 @@
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
>;
};