Hi there, I am trying to setup local-mac-address reading for the dm9000 ethernet on a MIPS Creator CI20. The efuse block contains the actual mac address, so I exposed it using nvmem framework: efuse: efuse@134100d0 { compatible = "ingenic,jz4780-efuse"; reg = <0x134100d0 0xff>; clocks = <&cgu JZ4780_CLK_AHB2>; clock-names = "bus_clk"; #address-cells = <1>; #size-cells = <1>; eth_mac: eth_mac@12 { /* six byte/48bit MAC address stored as 8-bit integers */ reg = <0x12 0x6>; }; }; while dm9000 is defined by (boring stuff trimmed): dm9000@6 { compatible = "davicom,dm9000"; davicom,no-eeprom; /* local-mac-address = [00 00 00 00 00 00]; */ }; dm9000 driver handles platform data (dm9000_parse_dt -> of_get_mac_address) just fine. On this SOC there is no eeprom attached to dm9000, so I could potentially hack my way using C code and pretend there is an attached eeprom, using the dm9000 pdata API: $ cat include/linux/dm9000.h [...] struct dm9000_plat_data { /* allow replacement IO routines */ void (*inblk)(void __iomem *reg, void *data, int len); void (*outblk)(void __iomem *reg, void *data, int len); void (*dumpblk)(void __iomem *reg, int len); }; but it feels like there should be a simpler way using DTS declaration only, right ? Maybe I am missing the whole point and local-mac-address should only be setup by U-Boot in this case. Thanks for comments, -- Mathieu