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The main boot sequence for Microchip AT91 devices is one of the following: 1/ ROM BOOT -> AT91Bootstrap -> U-Boot -> Linux Kernel 2/ ROM BOOT -> AT91Bootstrap -> Linux Kernel For case 1/ U-Boot is the stage where the Ethernet MAC addresses are set. For case 2/ where U-Boot is skipped the Ethernet MAC addresses need to be configured in Linux. For this add EEPROMs and nvmem-layout to describe EUI48 MAC address regions. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> [andrei.simion@microchip.com: Add nvmem-layout to describe eui48 mac region. Align compatible name with datasheet. Reword commit message.] Signed-off-by: Andrei Simion <andrei.simion@microchip.com> [claudiu.beznea: adjusted the new commit message] Signed-off-by: Claudiu Beznea <claudiu.beznea@tuxon.dev> Link: https://lore.kernel.org/r/20240703084704.197697-3-andrei.simion@microchip.com