On Wed, Nov 05, 2014 at 09:01:08PM +0100, Karsten Merker wrote:

[Failing ethernet PHY detection in d-i on the BananaPi]
> I have now run several tests with a modified BananaPi dtb in
> which I have added a "regulator-always-on" stanza to the
> reg_gmac_3v3 definition.  With this change the PHY detection in
> d-i has worked every time, so this would support the theory that
> the regulator might not be powered up fast enough for the PHY
> detection to succeed, but I cannot see why this problem only
> occurs within the d-i environment.

Further experiments show that increasing the "startup-delay-us"
value in the regulator definition seems to solve the issue.  I'll
do some further experiments to determine a value that is long
enough for a reliable detection without being unnecessary long
and discuss the issue with the upstream author.

Regards,
Karsten
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