Some MT7915 calibration data consists of two parts. The first part
"eeprom" size is 0xe00. The second part "precal" size is 0x19c10.
Though some devices may not have precal data, it's better to assume
that precal data exists as no users/developers confirm it. On the
other hand, some devices definitely do not contain precal data
because the EEPROM partition size is smaller than the precal NVMEM
cell size.
Signed-off-by: Shiji Yang <yangshiji66@qq.com>
Some MT7915 devices need to load the second part of the eeprom to
work properly. The mt76 driver is not yet ready to read the pre-cal
data via the NVMEM cell. Therefore, partially revert commit to fix
the device probe issue on some devices.
P.S.
Except for D-Link and Ubnt devices, It is still uncertain whether
pre-cal data is required for other devices in the patch.
This partially reverts commit 9ac891f8c4.
Fixes: https://github.com/openwrt/openwrt/issues/13700
Signed-off-by: Shiji Yang <yangshiji66@qq.com>
Specifications
SoC: MT7621
CPU: 880 MHz
Flash: 32 MiB
RAM: 256 MiB
WLAN: MT7915 WiFi 6 (2.4/5 GHz)
Ethernet: 2x Gbit ports
MAC
LAN b4:4b:d6:2e:c7:b0 (label)
WAN b4:4b:d6:2e:c7:b1
WiFi 2.4 00:0c:43:26:46:08
WiFi 5 00:0c:43:26:59:97
Installation
There are two known options:
1) The Luci-based UI.
2) Press and hold the reset button during power up.
The router will request 'recovery.bin' from a TFTP server at
192.168.1.88.
Both options require a signed firmware binary.
The openwrt image supplied by cudy is signed and can be used to
install unsigned images.
Signed-off-by: Leon M. Busch-George <leon@georgemail.eu>
