nvmem-layout and mt76 eeprom (ramips/mt7621 target, 5.15.x)

[Piotr Dymacz]

Hi Rafał,

I'm trying to use the new NVMEM cells with mt76 EEPROM bindings on an 
mt7621 (SPI NOR flash) with mt79x5 (PCIe) based device, same way as you 
did in 03b3284805 [1] and daaa0c1b25 [2] (ath79 target).

If I keep 'eeprom' within 'nvmem-layout', wifi doesn't work due to:

root at OpenWrt:/# cat /sys/kernel/debug/devices_deferred

0000:02:00.0pci: supplier 
1e000b00.spi:flash at 0:partitions:partition at 50000:nvmem-layout not ready

Keeping 'eeprom' node outside 'nvmem-layout' gives expected results.

It seems there are only one (Netgear WNDR3700 v5) similar device under 
ramips/mt7621, with 'eeprom' within 'nvmem-layout' defines and SPI NOR 
(all other are NAND based, maybe related?) but I don't see any bug 
reports (complains) about broken WiFi for it.

Any clue?

You can find related DTS in my staging tree [3].

Thanks!

[1] https://git.openwrt.org/03b3284805
[2] https://git.openwrt.org/daaa0c1b25
[3] 
https://git.openwrt.org/?p=openwrt/staging/pepe2k.git;a=blob;f=target/linux/ramips/dts/mt7621_alfa-network_ax1800rm.dts;hb=refs/heads/main

-- 
Cheers,
Piotr