From 4ce01ce36d77137cf60776b320babed89de6bd4c Mon Sep 17 00:00:00 2001
From: Adam Ford <aford173@gmail.com>
Date: Tue, 26 Apr 2022 15:51:43 -0500
Subject: [PATCH] arm64: dts: imx8mm-beacon: Enable RTS-CTS on UART3
Git-commit: 4ce01ce36d77137cf60776b320babed89de6bd4c
Patch-mainline: v5.19-rc1
References: git-fixes
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>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
index ec3f2c177035..f338a886d811 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
@@ -278,6 +278,7 @@ &uart3 {
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 @@ pinctrl_uart3: uart3grp {
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
>;
};
--
2.35.3