On 05/03/2025 at 15:31:33 +0530, Manikandan Muralidharan <manikandan.m@xxxxxxxxxxxxx> wrote: > From: Varshini Rajendran <varshini.rajendran@xxxxxxxxxxxxx> > > EUI identifier and the MAC Address of the Ethernet Interface is stored > after the SFDP table of contents starting at address 0x260 in the > QSPI memory. > Register the entire SFDP region read by the spi-nor (nor->sfdp) into the > NVMEM framework and read the MAC Address when requested using the nvmem > properties in the DT by the net drivers. > > In kernel the Ethernet MAC address relied on U-Boot env variables or > generated a random address, which posed challenges for boards without > on-board EEPROMs or with multiple Ethernet ports. > This change ensures consistent and reliable MAC address retrieval from QSPI, > benefiting boards like the sama5d29 curiosity and sam9x75 curiosity. Do you mean spi-nor have a programmable area in their SFDP table? Isn't this supposed to be a read-only area written once in factory? I am not a big fan of exposing the whole SFDP area. I would suggest to expose just the MAC address. You can make use of nvmem layout drivers if that is needed. Thanks, Miquèl
