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

[Greg Kroah-Hartman]

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
 		>;
 	};