[PATCH 09/13] board: venice: add imx8mp-gw82xx support

[Tim Harvey]

The Gateworks GW82XX-2X is an ARM based single board computer (SBC)
comprised of the i.MX8M Plus based gw702x SoM and the gw82xx
baseboard featuring:
 - i.MX8M Plus SoC
 - LPDDR4 DRAM
 - eMMC FLASH
 - Gateworks System Controller (GSC)
 - microSD (1.8V/3.3V Capable)
 - panel status bi-color LED
 - pushbutton switch
 - fan controller with tachometer
 - USB Type-C connector
 - PCIe switch
 - 2x GbE RJ45 connectors
 - multi-protocol RS232/RS485/RS422 Serial ports
 - 2x Flexible Socket Adapters with SDIO/UART/USB/PCIe
   (for M.2 and miniPCIe expansion)
 - 2x isolated CAN
 - GPS
 - accelerometer
 - magnetometer
 - off-board connectors for: SPI, GPIO, I2C, ADC
 - Wide range DC power input
 - support for 802.3at PoE (via adapter)

Add support for it by providing its device-tree.

Signed-off-by: Tim Harvey <tharvey at gateworks.com>
---
 .../dts/imx8mp-venice-gw82xx-2x-u-boot.dtsi   | 49 +++++++++++++++++++
 configs/imx8mp_venice_defconfig               |  2 +-
 2 files changed, 50 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm/dts/imx8mp-venice-gw82xx-2x-u-boot.dtsi

diff --git a/arch/arm/dts/imx8mp-venice-gw82xx-2x-u-boot.dtsi b/arch/arm/dts/imx8mp-venice-gw82xx-2x-u-boot.dtsi
new file mode 100644
index 000000000000..2d58b3b8ab71
--- /dev/null
+++ b/arch/arm/dts/imx8mp-venice-gw82xx-2x-u-boot.dtsi
@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2025 Gateworks Corporation
+ */
+#include "imx8mp-venice-gw702x-u-boot.dtsi"
+
+&gpio4 {
+	dio_1 {
+		gpio-hog;
+		input;
+		gpios = <8 GPIO_ACTIVE_HIGH>;
+		line-name = "dio1";
+	};
+
+	dio_0 {
+		gpio-hog;
+		input;
+		gpios = <11 GPIO_ACTIVE_HIGH>;
+		line-name = "dio0#";
+	};
+
+	usb1mux {
+		gpio-hog;
+		output-high;
+		gpios = <17 GPIO_ACTIVE_HIGH>;
+		line-name = "usb1_mux";
+	};
+
+	rs485_en {
+		gpio-hog;
+		output-low;
+		gpios = <22 GPIO_ACTIVE_HIGH>;
+		line-name = "rs485_en";
+	};
+
+	rs485_term {
+		gpio-hog;
+		output-low;
+		gpios = <23 GPIO_ACTIVE_HIGH>;
+		line-name = "rs485_term";
+	};
+
+	rs485_half {
+		gpio-hog;
+		output-low;
+		gpios = <27 GPIO_ACTIVE_HIGH>;
+		line-name = "rs485_hd";
+	};
+};
diff --git a/configs/imx8mp_venice_defconfig b/configs/imx8mp_venice_defconfig
index 8f591f4c7dce..10eac0a0c785 100644
--- a/configs/imx8mp_venice_defconfig
+++ b/configs/imx8mp_venice_defconfig
@@ -88,7 +88,7 @@ CONFIG_CMD_EXT4_WRITE=y
 # CONFIG_SPL_EFI_PARTITION is not set
 CONFIG_OF_CONTROL=y
 CONFIG_SPL_OF_CONTROL=y
-CONFIG_OF_LIST="freescale/imx8mp-venice-gw71xx-2x freescale/imx8mp-venice-gw72xx-2x freescale/imx8mp-venice-gw73xx-2x freescale/imx8mp-venice-gw74xx freescale/imx8mp-venice-gw75xx-2x"
+CONFIG_OF_LIST="freescale/imx8mp-venice-gw71xx-2x freescale/imx8mp-venice-gw72xx-2x freescale/imx8mp-venice-gw73xx-2x freescale/imx8mp-venice-gw74xx freescale/imx8mp-venice-gw75xx-2x freescale/imx8mp-venice-gw82xx-2x"
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_SYS_REDUNDAND_ENVIRONMENT=y
 CONFIG_SYS_MMC_ENV_DEV=2
-- 
2.25.1