[PATCH v2 2/2] mips: mt7628: Add Onion Omega2/2+ board support
Philip Oberfichtner
pro at denx.de
Tue May 27 14:10:49 CEST 2025
The Omega2 / Omega2+ are based on the MediaTek MT7688 SoC with the
following features:
- 64 / 128MB of DDR2 memory
- 16 / 32MB of SPI NOR flash
- USB, WiFi and many more peripherals
Signed-off-by: Philip Oberfichtner <pro at denx.de>
---
Notes:
Changes in v2:
- Fix style issues as reported by checkpatch
- Add MAINTAINERS file
arch/mips/dts/Makefile | 1 +
arch/mips/dts/onion-omega2p.dts | 58 ++++++++++++
arch/mips/mach-mtmips/mt7628/Kconfig | 7 ++
board/onion/omega2p/Kconfig | 12 +++
board/onion/omega2p/MAINTAINERS | 10 ++
board/onion/omega2p/Makefile | 3 +
board/onion/omega2p/board.c | 134 +++++++++++++++++++++++++++
board/onion/omega2p/omega2p.env | 18 ++++
configs/onion-omega2p_defconfig | 81 ++++++++++++++++
include/configs/onion-omega2p.h | 15 +++
10 files changed, 339 insertions(+)
create mode 100644 arch/mips/dts/onion-omega2p.dts
create mode 100644 board/onion/omega2p/Kconfig
create mode 100644 board/onion/omega2p/MAINTAINERS
create mode 100644 board/onion/omega2p/Makefile
create mode 100644 board/onion/omega2p/board.c
create mode 100644 board/onion/omega2p/omega2p.env
create mode 100644 configs/onion-omega2p_defconfig
create mode 100644 include/configs/onion-omega2p.h
diff --git a/arch/mips/dts/Makefile b/arch/mips/dts/Makefile
index 7c4ee8b668b..cb33f96edee 100644
--- a/arch/mips/dts/Makefile
+++ b/arch/mips/dts/Makefile
@@ -21,6 +21,7 @@ dtb-$(CONFIG_BOARD_MT7621_NAND_RFB) += mediatek,mt7621-nand-rfb.dtb
dtb-$(CONFIG_BOARD_MT7628_RFB) += mediatek,mt7628-rfb.dtb
dtb-$(CONFIG_BOARD_GARDENA_SMART_GATEWAY_MT7688) += gardena-smart-gateway-mt7688.dtb
dtb-$(CONFIG_BOARD_LINKIT_SMART_7688) += linkit-smart-7688.dtb
+dtb-$(CONFIG_BOARD_ONION_OMEGA2) += onion-omega2p.dtb
dtb-$(CONFIG_TARGET_OCTEON_EBB7304) += mrvl,octeon-ebb7304.dtb
dtb-$(CONFIG_TARGET_OCTEON_NIC23) += mrvl,octeon-nic23.dtb
dtb-$(CONFIG_BOARD_NETGEAR_CG3100D) += netgear,cg3100d.dtb
diff --git a/arch/mips/dts/onion-omega2p.dts b/arch/mips/dts/onion-omega2p.dts
new file mode 100644
index 00000000000..64fecba1db9
--- /dev/null
+++ b/arch/mips/dts/onion-omega2p.dts
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2024 Zheng Han <zh at onioniot.com>, Lazar Demin <lazar at onioniot.com>
+ */
+
+/dts-v1/;
+
+#include "mt7628a.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+ compatible = "onion,omega2", "onion,omega2p", "ralink,mt7628a-soc";
+ model = "Onion Omega2/Omega2+";
+
+ aliases {
+ serial0 = &uart0;
+ spi0 = &spi0;
+ };
+
+ chosen {
+ stdout-path = &uart0;
+ };
+};
+
+&pinctrl {
+ state_default: pin_state {
+ p0led {
+ groups = "p0led_a";
+ function = "led";
+ };
+ };
+};
+
+&uart0 {
+ status = "okay";
+};
+
+&spi0 {
+ status = "okay";
+ num-cs = <2>;
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&spi_dual_pins>;
+
+ spi-flash at 0 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "jedec,spi-nor";
+ spi-max-frequency = <40000000>;
+ reg = <0>;
+ };
+};
+
+ð {
+ pinctrl-names = "default";
+ pinctrl-0 = <&ephy_iot_mode>;
+ mediatek,poll-link-phy = <0>;
+};
diff --git a/arch/mips/mach-mtmips/mt7628/Kconfig b/arch/mips/mach-mtmips/mt7628/Kconfig
index 79b2ddc6692..a75196eaefd 100644
--- a/arch/mips/mach-mtmips/mt7628/Kconfig
+++ b/arch/mips/mach-mtmips/mt7628/Kconfig
@@ -27,6 +27,12 @@ config BOARD_MT7628_RFB
SPI-NOR flash, 1 built-in switch with 5 ports, 1 UART, 1 USB host,
1 SDXC, 1 PCIe socket and JTAG pins.
+config BOARD_ONION_OMEGA2
+ bool "Onion Omega2/2+"
+ help
+ Onion Omega2/2+ IoT computer. Has a MT7688 SoC with 64/128 MiB of DDR2
+ RAM and 16/32 MiB of SPI flash.
+
config BOARD_VOCORE2
bool "VoCore2"
select SPL_SERIAL
@@ -52,6 +58,7 @@ config SYS_CONFIG_NAME
default "mt7628" if BOARD_MT7628_RFB
source "board/gardena/smart-gateway-mt7688/Kconfig"
+source "board/onion/omega2p/Kconfig"
source "board/seeed/linkit-smart-7688/Kconfig"
source "board/vocore/vocore2/Kconfig"
diff --git a/board/onion/omega2p/Kconfig b/board/onion/omega2p/Kconfig
new file mode 100644
index 00000000000..45c18ee27ef
--- /dev/null
+++ b/board/onion/omega2p/Kconfig
@@ -0,0 +1,12 @@
+if BOARD_ONION_OMEGA2
+
+config SYS_BOARD
+ default "omega2p"
+
+config SYS_VENDOR
+ default "onion"
+
+config SYS_CONFIG_NAME
+ default "onion-omega2p"
+
+endif
diff --git a/board/onion/omega2p/MAINTAINERS b/board/onion/omega2p/MAINTAINERS
new file mode 100644
index 00000000000..4532c1c6d3e
--- /dev/null
+++ b/board/onion/omega2p/MAINTAINERS
@@ -0,0 +1,10 @@
+ONION OMEGA2/2+
+M: Philip Oberfichtner <pro at denx.de>
+S: Maintained
+F: arch/mips/dts/onion-omega2p.dts
+F: board/onion/omega2p/Kconfig
+F: board/onion/omega2p/Makefile
+F: board/onion/omega2p/board.c
+F: board/onion/omega2p/omega2p.env
+F: configs/onion-omega2p_defconfig
+F: include/configs/onion-omega2p.h
diff --git a/board/onion/omega2p/Makefile b/board/onion/omega2p/Makefile
new file mode 100644
index 00000000000..70cd7a8e568
--- /dev/null
+++ b/board/onion/omega2p/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0+
+
+obj-y += board.o
diff --git a/board/onion/omega2p/board.c b/board/onion/omega2p/board.c
new file mode 100644
index 00000000000..b56fbf262ad
--- /dev/null
+++ b/board/onion/omega2p/board.c
@@ -0,0 +1,134 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2024 Zheng Han <zh at onioniot.com>, Lazar Demin <lazar at onioniot.com>
+ * Copyright (C) 2025 DENX Software Engineering GmbH, Philip Oberfichtner <pro at denx.de>
+ */
+
+#include <asm/io.h>
+#include <env.h>
+#include <init.h>
+#include <mtd.h>
+
+#define OMEGA2_REG(x) (*((u32 *)(x)))
+#define OMEGA2_SYSCTL_BASE 0xB0000000
+#define OMEGA2_SYS_CNTL_BASE (OMEGA2_SYSCTL_BASE)
+#define OMEGA2_REG_PIODIR (OMEGA2_SYSCTL_BASE + 0x600)
+
+static int detect_rst(void)
+{
+ u32 val = OMEGA2_REG(0xb0000624); // Read GPIO 44 (reset button)
+
+ return (val & 1 << 6) ? 1 : 0;
+}
+
+static void gpio_init(void)
+{
+ u32 val;
+
+ printf("Initializing MT7688 GPIO system.\n");
+
+ //set gpio2_mode - setting wled, and p0,p1,p2,p3,p4 LED pins to GPIO mode
+ val = 0x555;
+ OMEGA2_REG(OMEGA2_SYS_CNTL_BASE + 0x64) = val; // GPIO2_MODE register
+ // GINT_FEDGE_1: setting "Enable falling edge triggered" for GPIOs 39-42
+ OMEGA2_REG(0xb0000644) = 0x0f << 7;
+
+ // set gpio_ctrl_1 register: set GPIO44 to output
+ //gpio44 output gpio_ctrl_1 bit3=1
+ val = OMEGA2_REG(OMEGA2_REG_PIODIR + 0x04);
+ val |= 1 << 12;
+ OMEGA2_REG(OMEGA2_REG_PIODIR + 0x04) = val;
+
+ // set gpio1_mode register: set WDT_MODE to GPIO mode
+ //set gpio1_mode 14=1b1
+ val = OMEGA2_REG(OMEGA2_SYS_CNTL_BASE + 0x60);
+ val |= 1 << 14;
+ OMEGA2_REG(OMEGA2_SYS_CNTL_BASE + 0x60) = val;
+
+ // set gpio_ctrl_1 resgister: set GPIO38 to input
+ //gpio38 input gpio_ctrl_1 bit5=0
+ val = OMEGA2_REG(OMEGA2_REG_PIODIR + 0x04);
+ val &= ~1 << 6;
+ OMEGA2_REG(OMEGA2_REG_PIODIR + 0x04) = val;
+}
+
+enum onion_board_variant {
+ OMEGA2,
+ OMEGA2P,
+ UNKNOWN,
+};
+
+static enum onion_board_variant board_variant(void)
+{
+ struct mtd_info *mtd;
+
+ mtd_probe_devices();
+
+ mtd_for_each_device(mtd) {
+ if (mtd->type != MTD_NORFLASH)
+ continue;
+
+ switch (mtd->size) {
+ case 16 * 1024 * 1024: // 16 MB
+ return OMEGA2;
+
+ case 32 * 1024 * 1024: // 32 MB
+ return OMEGA2P;
+
+ default:
+ break;
+ }
+ }
+
+ return UNKNOWN;
+}
+
+#define ONION_MTDPARTS_BASE "spi0.0:192k(u-boot),64k(u-boot-env),64k(factory)"
+
+static void set_mtdparts(void)
+{
+ switch (board_variant()) {
+ case OMEGA2P:
+ printf("Detected board variant OMEGA2+: ");
+ env_set("mtdparts", ONION_MTDPARTS_BASE ",32448k(firmware)");
+ break;
+
+ case OMEGA2:
+ printf("Detected board variant OMEGA2: ");
+ env_set("mtdparts", ONION_MTDPARTS_BASE ",16064k(firmware)");
+ break;
+
+ default:
+ printf("Unable to detect board variant! Using default value: ");
+ env_set("mtdparts", ONION_MTDPARTS_BASE);
+ }
+
+ printf("mtdparts=\"%s\"\n", env_get("mtdparts"));
+}
+
+#define WELCOME_MESSAGE \
+ "\n\n" \
+ " *************************************************************\n"\
+ " * For more info on using U-Boot, visit *\n"\
+ " * https://documentation.onioniot.com/bootloader/overview *\n"\
+ " * *\n"\
+ " * Hold the reset button to enter the U-Boot commandline. *\n"\
+ " *************************************************************\n"\
+ "\n"
+
+int board_late_init(void)
+{
+ gpio_init();
+
+ printf(WELCOME_MESSAGE);
+
+ set_mtdparts();
+
+ if (detect_rst()) {
+ printf("Reset button pressed - entering shell ...\n");
+ env_set("reset_pressed", "1");
+ // This env variable is evaluated by our bootcmd.
+ }
+
+ return 0;
+}
diff --git a/board/onion/omega2p/omega2p.env b/board/onion/omega2p/omega2p.env
new file mode 100644
index 00000000000..ff3fdcadf90
--- /dev/null
+++ b/board/onion/omega2p/omega2p.env
@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: GPL-2.0+
+# Copyright (C) 2025 DENX Software Engineering GmbH, Philip Oberfichtner <pro at denx.de>
+
+# Boot options
+bootargs=console=ttyS0,115200 rootfstype=squashfs,jffs2
+bootfile=firmware.bin
+boot_linux=sf probe && mtd read firmware 81800000 0 400000 && bootm 81800000
+enter_shell=env set reset_pressed # unset variable
+bootcmd= if test -z "${reset_pressed}"; then run boot_linux; else run enter_shell; fi
+
+# Network configuration
+serverip=192.168.8.100
+ipaddr=192.168.8.8
+loadaddr=0x81800000
+
+# MTD settings
+mtdids=nor0=spi0.0
+# mtdparts will be set at runtime, according to the specific board variant.
diff --git a/configs/onion-omega2p_defconfig b/configs/onion-omega2p_defconfig
new file mode 100644
index 00000000000..95f1a469f00
--- /dev/null
+++ b/configs/onion-omega2p_defconfig
@@ -0,0 +1,81 @@
+CONFIG_MIPS=y
+CONFIG_SKIP_LOWLEVEL_INIT=y
+CONFIG_SYS_MALLOC_LEN=0x1000000
+CONFIG_SPL_LIBCOMMON_SUPPORT=y
+CONFIG_SPL_LIBGENERIC_SUPPORT=y
+CONFIG_NR_DRAM_BANKS=1
+CONFIG_ENV_SIZE=0x4000
+CONFIG_ENV_OFFSET=0x30000
+CONFIG_ENV_SECT_SIZE=0x10000
+CONFIG_DEFAULT_DEVICE_TREE="onion-omega2p"
+CONFIG_SPL_SERIAL=y
+CONFIG_SPL_SYS_MALLOC_F_LEN=0x80000
+CONFIG_SPL_BSS_START_ADDR=0x80010000
+CONFIG_SPL_BSS_MAX_SIZE=0x10000
+CONFIG_SYS_LOAD_ADDR=0x81800000
+CONFIG_SPL=y
+CONFIG_ARCH_MTMIPS=y
+CONFIG_SOC_MT7628=y
+CONFIG_BOARD_ONION_OMEGA2=y
+CONFIG_SYS_MIPS_TIMER_FREQ=290000000
+CONFIG_MIPS_CACHE_SETUP=y
+CONFIG_MIPS_CACHE_DISABLE=y
+CONFIG_RESTORE_EXCEPTION_VECTOR_BASE=y
+# CONFIG_MIPS_BOOT_ENV_LEGACY is not set
+CONFIG_MIPS_BOOT_FDT=y
+CONFIG_ENV_VARS_UBOOT_CONFIG=y
+CONFIG_FIT=y
+CONFIG_FIT_SIGNATURE=y
+CONFIG_LEGACY_IMAGE_FORMAT=y
+CONFIG_BOOTDELAY=0
+CONFIG_AUTOBOOT_KEYED=y
+CONFIG_AUTOBOOT_KEYED_CTRLC=y
+CONFIG_OF_STDOUT_VIA_ALIAS=y
+CONFIG_BOARD_LATE_INIT=y
+CONFIG_SYS_MALLOC_BOOTPARAMS=y
+CONFIG_UBOOT_WITH_SPL_SIZE_LIMIT=0x30000
+CONFIG_SPL_MAX_SIZE=0x10000
+CONFIG_SPL_SYS_MALLOC_SIMPLE=y
+CONFIG_SPL_NOR_SUPPORT=y
+CONFIG_HUSH_PARSER=y
+# CONFIG_CMD_ELF is not set
+CONFIG_CMD_MEMINFO=y
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_MTD=y
+CONFIG_CMD_PART=y
+CONFIG_CMD_SPI=y
+CONFIG_CMD_DHCP=y
+CONFIG_CMD_MII=y
+CONFIG_CMD_PING=y
+CONFIG_CMD_TIME=y
+CONFIG_CMD_FS_GENERIC=y
+CONFIG_CMD_MTDPARTS=y
+CONFIG_ENV_IS_IN_SPI_FLASH=y
+CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_USE_DEFAULT_ENV_FILE=y
+CONFIG_DEFAULT_ENV_FILE="board/onion/omega2p/omega2p.env"
+CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
+CONFIG_USE_IPADDR=y
+CONFIG_IPADDR="192.168.8.8"
+CONFIG_USE_SERVERIP=y
+CONFIG_SERVERIP="192.168.8.100"
+CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_SPL_DM=y
+CONFIG_LED=y
+CONFIG_LED_BLINK=y
+CONFIG_LED_GPIO=y
+CONFIG_DM_MTD=y
+CONFIG_SPI_FLASH_BAR=y
+CONFIG_SPI_FLASH_GIGADEVICE=y
+CONFIG_SPI_FLASH_MACRONIX=y
+CONFIG_SPI_FLASH_SPANSION=y
+CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_SPI_FLASH_MTD=y
+CONFIG_MT7628_ETH=y
+CONFIG_PHY=y
+CONFIG_SPI=y
+CONFIG_MT7621_SPI=y
+CONFIG_LZMA=y
+# CONFIG_GZIP is not set
+CONFIG_SPL_LZMA=y
diff --git a/include/configs/onion-omega2p.h b/include/configs/onion-omega2p.h
new file mode 100644
index 00000000000..ca170b22a40
--- /dev/null
+++ b/include/configs/onion-omega2p.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2024 Zheng Han <zh at onioniot.com>, Lazar Demin <lazar at onioniot.com>
+ */
+#ifndef __CONFIG_ONION_OMEGA2P_H
+#define __CONFIG_ONION_OMEGA2P_H
+
+/* RAM */
+#define CFG_SYS_SDRAM_BASE 0x80000000
+#define CFG_SYS_INIT_SP_OFFSET 0x400000
+
+/* Dummy value */
+#define CFG_SYS_UBOOT_BASE 0
+
+#endif /* __CONFIG_ONION_OMEGA2P_H */
--
2.39.5
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