arm64: dts: imx8mn-evk: Add UART3 support

UART3 pins are available in the J1003 connector.

Add support for it.

Signed-off-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi b/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
index dc75d6d..d1f6ccc 100644 (file)
--- a/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
@@ -212,6 +212,15 @@
        status = "okay";
 };
 
+&uart3 {
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_uart3>;
+       assigned-clocks = <&clk IMX8MN_CLK_UART3>;
+       assigned-clock-parents = <&clk IMX8MN_SYS_PLL1_80M>;
+       uart-has-rtscts;
+       status = "okay";
+};
+
 &usbotg1 {
        dr_mode = "otg";
        hnp-disable;
@@ -374,6 +383,15 @@
                >;
        };
 
+       pinctrl_uart3: uart3grp {
+               fsl,pins = <
+                       MX8MN_IOMUXC_ECSPI1_SCLK_UART3_DCE_RX           0x140
+                       MX8MN_IOMUXC_ECSPI1_MOSI_UART3_DCE_TX           0x140
+                       MX8MN_IOMUXC_ECSPI1_SS0_UART3_DCE_RTS_B 0x140
+                       MX8MN_IOMUXC_ECSPI1_MISO_UART3_DCE_CTS_B        0x140
+               >;
+       };
+
        pinctrl_usdhc2_gpio: usdhc2gpiogrp {
                fsl,pins = <
                        MX8MN_IOMUXC_GPIO1_IO15_GPIO1_IO15      0x1c4