[PATCH v2 1/3] net: eth-uclass: Introduce NET_PREFER_ROM_MAC_ADDR

[Marek Vasut]

On 4/22/24 3:56 PM, Detlev Casanova wrote:
> On some boards, a MAC address is set based on the CPU ID or other
> information. This is usually done in the misc_init_r() function.
> 
> This becomes a problem for net devices that are probed after the call to
> misc_init_r(), for example, when the ethernet is on a PCI port, which
> needs to be enumerated.
> 
> In this case, misc_init_r() will set the ethaddr variable, then, when
> the ethernet device is probed, if it has a ROM address, u-boot will warn
> about a MAC address mismatch and use the misc_init_r() address instead
> of the one in ROM.
> 
> The operating system later will most likely use the ROM MAC address,
> which can be confusing.
> 
> To avoid that, this commit introduces NET_PREFER_ROM_MAC_ADDR that can
> be set for boards that have such an interface.
> 
> Signed-off-by: Detlev Casanova <detlev.casanova at collabora.com>

Won't the system pick ROM MAC if $ethaddr is not set ?