Freescale fec.c driver breakage

On Tue, Jun 05, 2012 at 10:36:30PM +1000, Greg Ungerer wrote:

I am pretty sure AHB was bolted on later. This FEC core has progressed
from very old Motorola PowerPC platforms to ColdFire/M68k to ARM, over
something coming close to a 20 year period. In the earlier uses of it
there is quite a few differences (including some quite odd register
layout differences).

There may be other things that are somewhat like an ahb clock and ipg
clock, but really these are things that have come along later with a
specific platform implementation.

For AHB that sounds plausible, but for the IPG clock (assuming I've
identified the function correctly) I've got a very hard time believing
that the IP ever didn't need a clock - my understanding is that it's the
master clock for the IP ("IP gate").
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