[Bug 1937376] Re: u-boot in impish has unstable mac address

[Heinrich Schuchardt]

The ethernet address of the HiFive Unmatched board is determined here:

board/sifive/unmatched/hifive-platform-i2c-eeprom.c:534:
eth_env_set_enetaddr("ethaddr", e.mac_addr);

According to the code in hifive-platform-i2c-eeprom.c you can write the
MAC address to the device eeprom using the mac command:

mac read_eeprom
mac mac_address 01:02:03:04:05:06
max write_eeprom

I have not tested this!

The code first appeared in commit 946afdf6209e ("board: sifive:
unmatched: add initial support for a platform ID EEPROM") dated June
30th, 2021 and is not contained in release v2021.07.

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Title:
  u-boot in impish has unstable mac address

Status in u-boot package in Ubuntu:
  New

Bug description:
  u-boot in impish has unstable mac address

  Somehow the board that is usually SiFive mac address range of
  70:b3:d5:92:f4:40 has become a6:d4:5b:7a:a0:a7

  Ideally mac address should be stable, and in the range from the
  manufacturer.

  70:B3:D5:92:F0:00/36 SiFive

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