[PATCH] Add AMCC Arches 460GT eval board support to platforms/44x

Arnd Bergmann arnd at arndb.de
Thu Jul 17 08:58:53 EST 2008

On Wednesday 16 July 2008, Grant Likely wrote:
> > Shouldn't it be enough to have a common compatible value in each
> > of these boards, e.g. "amcc,generic-ppc44x" and then just ignore the
> > specific type unless you need to do something special?
> This is bad for the same reason that "amcc,44x-<blah>" compatible values
> are bad in device nodes.  The definition of '*-44x-*' changes over time as
> new parts are added.  Compatible values should always reflect an exact
> part number.

I agree in general, but I also think that all 44x boards should be
regarded as the same machine time, in the same way that all powermacs
are detected as compatible with "Power Macintosh" or "MacRISC", or
how all sorts of serial ports claim compatibility with i8250.

For classic SOCs like 4xx or 52xx, the SOC familiy more or less defines
the platform, and all the details about peripherals can be expressed
in the device tree elsewhere.

If one board is so different that you need a separate board setup
in the kernel, it should simply not claim compatibility with the
SOC platform.

	Arnd <><

More information about the Linuxppc-embedded mailing list