I've a TL-WDR4320 which currently OpenWrt. Previously I used the WDR4310 ar71xx platform for this device, and both 2.4GHz and 5GHz worked fine.
When I recently did a transition from WDR4310 ar71xx to WDR4300 ath79 (I need to force a flash since the device name is not identical), as ar71xx is being deprecated in favor of ath79, the device lost its 5GHz capabilities, only 2.4GHz is still working.
Initially the 5GHz adapter was still listed in the configuration menu, but after doing another factory reset (as well as reflashes) the 5GHz adapter disappeared completely and I have never able to get it back.
The following could be found from the log:
[ 19.549553] ath9k 0000:00:00.0: enabling device (0000 -> 0002) [ 19.558487] ath9k 0000:00:00.0: Direct firmware load for ath9k-eeprom-pci-0000:00:00.0.bin failed with error -2 [ 19.568804] ath9k 0000:00:00.0: Falling back to syfs fallback for: ath9k-eeprom-pci-0000:00:00.0.bin [ 21.118512] ath: phy1: Couldn't reset chip [ 21.122697] ath: phy1: Unable to initialize hardware; initialization status: -5 [ 21.130227] ath9k 0000:00:00.0: Failed to initialize device [ 21.135989] ath9k: probe of 0000:00:00.0 failed with error -5
Has there been any progress with this issue? I'm currently on the latest snapshot (WDR4300 ath79 platform, built today) and the problem's still there.