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// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
/*
* Copyright (C) 2021 PHYTEC Messtechnik GmbH
* Author: Jens Lang <j.lang@phytec.de>
*
* Tauri-L RS232 + RS485:
* - GPIO3_20 uart4_rs485_en needs to be driven high (active)
* - GPIO3_25 RS485_DE Driver enable
*/
#include <dt-bindings/clock/imx8mm-clock.h>
#include <dt-bindings/gpio/gpio.h>
#include "imx8mm-pinfunc.h"
/dts-v1/;
/plugin/;
&gpio3 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_gpio3_hog>;
uart4-rs485-en-hog {
gpio-hog;
gpios = <20 GPIO_ACTIVE_HIGH>;
output-high;
line-name = "uart4_rs485_en";
};
};
/* UART2 - RS232 */
&uart2 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart2>;
assigned-clocks = <&clk IMX8MM_CLK_UART2>;
assigned-clock-parents = <&clk IMX8MM_SYS_PLL1_80M>;
status = "okay";
};
/* UART4 - RS485 */
&uart4 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart4>;
assigned-clocks = <&clk IMX8MM_CLK_UART4>;
assigned-clock-parents = <&clk IMX8MM_SYS_PLL1_80M>;
rts-gpios = <&gpio3 25 GPIO_ACTIVE_HIGH>;
linux,rs485-enabled-at-boot-time;
status = "okay";
};
&iomuxc {
pinctrl_gpio3_hog: gpio3hoggrp {
fsl,pins = <
MX8MM_IOMUXC_SAI5_RXC_GPIO3_IO20 0x49
>;
};
pinctrl_uart2: uart2grp {
fsl,pins = <
MX8MM_IOMUXC_UART2_RXD_UART2_DCE_RX 0x00
MX8MM_IOMUXC_UART2_TXD_UART2_DCE_TX 0x00
>;
};
pinctrl_uart4: uart4grp {
fsl,pins = <
MX8MM_IOMUXC_UART4_RXD_UART4_DCE_RX 0x49
MX8MM_IOMUXC_UART4_TXD_UART4_DCE_TX 0x49
MX8MM_IOMUXC_SAI5_MCLK_GPIO3_IO25 0x49
>;
};
};
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