From 8d97083c0b5dda658621b769add0a5392fb88dcd Mon Sep 17 00:00:00 2001 From: Parthiban Nallathambi Date: Sat, 25 May 2024 22:48:54 +0530 Subject: [PATCH] arm64: dts: phygate-tauri-l: add overlays for RS232 and RS485 UART2 and UART4 can used in following combination, 2 x RS232: - UART2 and UART4 without flow control - MUX selection GPIO3_20 must be held low 1 x RS232 + 1 x RS485: - UART2 - RS232 - UART4 - RS485 - MUX selection GPIO3_20 must be held high - RE/DE for RS485 controlled with GPIO3_25 1 x RS232 with flow control: - UART2 - RS232 - MUX selection GPIO3_20 must be held low Signed-off-by: Parthiban Nallathambi Signed-off-by: Shawn Guo --- arch/arm64/boot/dts/freescale/Makefile | 8 ++ .../imx8mm-phygate-tauri-l-rs232-rs232.dtso | 72 ++++++++++++++++++ .../imx8mm-phygate-tauri-l-rs232-rs485.dtso | 76 +++++++++++++++++++ .../imx8mm-phygate-tauri-l-rs232-rts-cts.dtso | 41 ++++++++++ 4 files changed, 197 insertions(+) create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-phygate-tauri-l-rs232-rs232.dtso create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-phygate-tauri-l-rs232-rs485.dtso create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-phygate-tauri-l-rs232-rts-cts.dtso diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile index 1b1e4db02071..eaa27649c28d 100644 --- a/arch/arm64/boot/dts/freescale/Makefile +++ b/arch/arm64/boot/dts/freescale/Makefile @@ -266,6 +266,14 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw73xx-0x-rs485.dtb dtb-$(CONFIG_ARCH_MXC) += imx8mp-venice-gw74xx-imx219.dtb dtb-$(CONFIG_ARCH_MXC) += imx8mp-venice-gw74xx-rpidsi.dtb +imx8mm-phygate-tauri-l-rs232-rs232-dtbs := imx8mm-phygate-tauri-l.dtb imx8mm-phygate-tauri-l-rs232-rs232.dtbo +imx8mm-phygate-tauri-l-rs232-cts-rts-dtbs := imx8mm-phygate-tauri-l.dtb imx8mm-phygate-tauri-l-rs232-rts-cts.dtbo +imx8mm-phygate-tauri-l-rs232-rs485-dtbs := imx8mm-phygate-tauri-l.dtb imx8mm-phygate-tauri-l-rs232-rs485.dtbo + +dtb-$(CONFIG_ARCH_MXC) += imx8mm-phygate-tauri-l-rs232-rs232.dtb +dtb-$(CONFIG_ARCH_MXC) += imx8mm-phygate-tauri-l-rs232-cts-rts.dtb +dtb-$(CONFIG_ARCH_MXC) += imx8mm-phygate-tauri-l-rs232-rs485.dtb + dtb-$(CONFIG_ARCH_S32) += s32g274a-evb.dtb dtb-$(CONFIG_ARCH_S32) += s32g274a-rdb2.dtb dtb-$(CONFIG_ARCH_S32) += s32g399a-rdb3.dtb diff --git a/arch/arm64/boot/dts/freescale/imx8mm-phygate-tauri-l-rs232-rs232.dtso b/arch/arm64/boot/dts/freescale/imx8mm-phygate-tauri-l-rs232-rs232.dtso new file mode 100644 index 000000000000..bf3e04651ba0 --- /dev/null +++ b/arch/arm64/boot/dts/freescale/imx8mm-phygate-tauri-l-rs232-rs232.dtso @@ -0,0 +1,72 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR MIT) +/* + * Copyright (C) 2021 PHYTEC Messtechnik GmbH + * Author: Jens Lang + * + * Tauri-L 2 x RS232: + * - GPIO3_20 uart4_rs485_en needs to be driven low (inactive) + */ + +#include +#include +#include "imx8mm-pinfunc.h" + +/dts-v1/; +/plugin/; + +&{/} { + compatible = "phytec,imx8mm-phygate-tauri-l"; + +}; + +&gpio3 { + pinctrl-names = "default"; + pinctrcl-0 = <&pinctrl_gpio3_hog>; + + uart4_rs485_en { + gpio-hog; + gpios = <20 GPIO_ACTIVE_HIGH>; + output-low; + 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 - RS232 */ +&uart4 { + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_uart4>; + assigned-clocks = <&clk IMX8MM_CLK_UART4>; + assigned-clock-parents = <&clk IMX8MM_SYS_PLL1_80M>; + 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 + >; + }; +}; diff --git a/arch/arm64/boot/dts/freescale/imx8mm-phygate-tauri-l-rs232-rs485.dtso b/arch/arm64/boot/dts/freescale/imx8mm-phygate-tauri-l-rs232-rs485.dtso new file mode 100644 index 000000000000..f4448cde0407 --- /dev/null +++ b/arch/arm64/boot/dts/freescale/imx8mm-phygate-tauri-l-rs232-rs485.dtso @@ -0,0 +1,76 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR MIT) +/* + * Copyright (C) 2021 PHYTEC Messtechnik GmbH + * Author: Jens Lang + * + * Tauri-L RS232 + RS485: + * - GPIO3_20 uart4_rs485_en needs to be driven high (active) + * - GPIO3_25 RS485_DE Driver enable + */ + +#include +#include +#include "imx8mm-pinfunc.h" + +/dts-v1/; +/plugin/; + +&{/} { + compatible = "phytec,imx8mm-phygate-tauri-l"; + +}; + +&gpio3 { + pinctrl-names = "default"; + pinctrcl-0 = <&pinctrl_gpio3_hog>; + + uart4_rs485_en { + 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 + >; + }; +}; diff --git a/arch/arm64/boot/dts/freescale/imx8mm-phygate-tauri-l-rs232-rts-cts.dtso b/arch/arm64/boot/dts/freescale/imx8mm-phygate-tauri-l-rs232-rts-cts.dtso new file mode 100644 index 000000000000..107f743fbb1c --- /dev/null +++ b/arch/arm64/boot/dts/freescale/imx8mm-phygate-tauri-l-rs232-rts-cts.dtso @@ -0,0 +1,41 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR MIT) +/* + * Copyright (C) 2023 PHYTEC Messtechnik GmbH + * Author: Jens Lang + * + * Tauri-L RS232 with RTS/CTS hardware flow control: + * - UART4_TX becomes RTS + * - UART4_RX becomes CTS + */ + +#include +#include "imx8mm-pinfunc.h" + +/dts-v1/; +/plugin/; + + +&{/} { + compatible = "phytec,imx8mm-phygate-tauri-l"; + +}; + +&uart2 { + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_uart2>; + assigned-clocks = <&clk IMX8MM_CLK_UART2>; + assigned-clock-parents = <&clk IMX8MM_SYS_PLL1_80M>; + uart-has-rtscts; + status = "okay"; +}; + +&iomuxc { + pinctrl_uart2: uart2grp { + fsl,pins = < + MX8MM_IOMUXC_UART2_RXD_UART2_DCE_RX 0x00 + MX8MM_IOMUXC_UART2_TXD_UART2_DCE_TX 0x00 + MX8MM_IOMUXC_UART4_RXD_UART2_DCE_CTS_B 0x00 + MX8MM_IOMUXC_UART4_TXD_UART2_DCE_RTS_B 0x00 + >; + }; +};