1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
2 /*
3 * Copyright (C) 2021 PHYTEC Messtechnik GmbH
4 * Author: Jens Lang <j.lang@phytec.de>
5 *
6 * Tauri-L 2 x RS232:
7 * - GPIO3_20 uart4_rs485_en needs to be driven low (inactive)
8 */
9
10 #include <dt-bindings/clock/imx8mm-clock.h>
11 #include <dt-bindings/gpio/gpio.h>
12 #include "imx8mm-pinfunc.h"
13
14 /dts-v1/;
15 /plugin/;
16
17 &gpio3 {
18 pinctrl-names = "default";
19 pinctrl-0 = <&pinctrl_gpio3_hog>;
20
21 uart4-rs485-en-hog {
22 gpio-hog;
23 gpios = <20 GPIO_ACTIVE_HIGH>;
24 output-low;
25 line-name = "uart4_rs485_en";
26 };
27 };
28
29 /* UART2 - RS232 */
30 &uart2 {
31 pinctrl-names = "default";
32 pinctrl-0 = <&pinctrl_uart2>;
33 assigned-clocks = <&clk IMX8MM_CLK_UART2>;
34 assigned-clock-parents = <&clk IMX8MM_SYS_PLL1_80M>;
35 status = "okay";
36 };
37
38 /* UART4 - RS232 */
39 &uart4 {
40 pinctrl-names = "default";
41 pinctrl-0 = <&pinctrl_uart4>;
42 assigned-clocks = <&clk IMX8MM_CLK_UART4>;
43 assigned-clock-parents = <&clk IMX8MM_SYS_PLL1_80M>;
44 status = "okay";
45 };
46
47 &iomuxc {
48 pinctrl_gpio3_hog: gpio3hoggrp {
49 fsl,pins = <
50 MX8MM_IOMUXC_SAI5_RXC_GPIO3_IO20 0x49
51 >;
52 };
53
54 pinctrl_uart2: uart2grp {
55 fsl,pins = <
56 MX8MM_IOMUXC_UART2_RXD_UART2_DCE_RX 0x00
57 MX8MM_IOMUXC_UART2_TXD_UART2_DCE_TX 0x00
58 >;
59 };
60
61 pinctrl_uart4: uart4grp {
62 fsl,pins = <
63 MX8MM_IOMUXC_UART4_RXD_UART4_DCE_RX 0x49
64 MX8MM_IOMUXC_UART4_TXD_UART4_DCE_TX 0x49
65 >;
66 };
67 };
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