Upstream uses a different filename, so lets rename our downstream
mt7981.dtsi to mt7981b.dtsi and update the device tree of all
MT7981 boards accordingly.
This is to prepare for the switch to Linux 6.12 which is going to
use the upstream mt7981b.dtsi (plus some patches on top).
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
The "gpio-export" driver doesn't require a "reg" property in the
device tree, hence we don't need to use the "#size-cells" property
to describe the size of "reg".
Signed-off-by: Shiji Yang <yangshiji66@outlook.com>
Link: https://github.com/openwrt/openwrt/pull/18290
Signed-off-by: Robert Marko <robimarko@gmail.com>
NRadio C8-668GL is a Wi-Fi 6 5G cellular router based on MediaTek MT7981B SoC.
- **SoC**: MediaTek MT7981B (2x Cortex-A53, 1.3GHz)
- **RAM**: Nanya NT5AD512M16C4-JR 1GB DDR4
- **Flash**: ESMT FC51L08SFY3A 8GB eMMC
- **Ethernet**:
- 1x 2.5GbE (via GMAC0 and GPY211 PHY, shared with MT7531AE)
- 3x 10/100/1000 Mbps (via MT7531AE, connected to GMAC0)
- 5G Modem: GMAC1 (via GPY211 PHY - RTL8125BG - RM520N-GL)
- **Wi-Fi**: MediaTek MT7976CN (2.4GHz/5GHz, 802.11ax, 2x2 MIMO, AX3000)
- **Buttons**: Reset, WPS
- **LEDs**: Power, 5G, 4G, WiFi
- **SIM Slot**: 1x Nano SIM
- **5G Modem**: Quectel RM520N-GL (Snapdragon™ X62)
- **Power**: 12V/2A DC, 5.5×2.1 connector
The MAC addresses are derived from the `fac_mac` field in the `bdinfo` partition, formatted as `fac_mac = HWMAC`. The allocation is as follows:
| Vendor | OpenWrt Interface | Address | Notes |
|---------|-------------------|---------------|------------------------------------------------|
| LAN | br-lan | Label MAC | Default |
| WAN | lan4 | Label MAC+1 | Only when lan4 is switched to WAN |
| 2.4GHz | phy0-ap0 | Label MAC | |
| 5GHz | phy1-ap0 | Label MAC | (Local Admin bit set) |
| Modem | eth1 | Label MAC+2 | |
1. Log in to the router via `http://192.168.66.1`/.
2. Upgrade the official firmware to dual-system mode.
3. Select **Burn second system** and upload the `sysupgrade.bin` image.
- Download the image from the OpenWrt build system or build it yourself using the OpenWrt buildroot.
4. Wait for 30 seconds and click **Switch system**.
5. The device will reboot and switch to OpenWrt.
Set the U-Boot environment variable `boot_system=0` and reboot:
```bash
fw_setenv boot_system 0
```
Power off the router, hold the **WPS button**, and power it back on.
1. Rename the stock firmware file to **`recovery.bin`**.
2. Set your PC's Ethernet IP to **192.168.1.88** and connect it to the lan1 port on the router.
3. Run a TFTP server and place the `recovery.bin` file in its root directory.
4. Power off the router, press and hold the **Reset button**, and power it back on.
5. Release the Reset button when the TFTP server shows activity.
6. Wait for the router to flash the firmware and reboot automatically.
- By default, `lan4` is part of `br-lan` and uses the label MAC address.
- To query the RM520N-GL module, use the following command:
```bash
cat /dev/ttyUSB2 & printf 'ATI\r\n' > /dev/ttyUSB2
```
Signed-off-by: Yaoguang Bai <0xdeadc0de@badguys.club>
Link: https://github.com/openwrt/openwrt/pull/17093
Signed-off-by: John Crispin <john@phrozen.org>
