tree 57b711ba74fe8ed4dc5219a588b17f0bf4ec7239
parent dac2f83fce01f0c2900918a4a8abd4c652151804
author Paul Gortmaker <paul.gortmaker@windriver.com> 1208405290 -0400
committer Jeff Garzik <jgarzik@redhat.com> 1209448677 -0400

[netdrvr] gianfar: Determine TBIPA value dynamically

TBIPA needs to be set to a value (on connected MDIO buses) that
doesn't conflict with PHYs on the bus.  By hardcoding it to 0x1f,
we were preventing boards with PHYs at 0x1f from working properly.
Instead, scan the bus when it comes up, and find an address that
doesn't have a PHY on it.  The TBI PHY configuration code then
trusts that the value in TBIPA is either safe, or doesn't matter
(ie - it's not an active bus with other PHYs).

Signed-off-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>