[PATCH v2] pata-generic/of: Make probing via device tree non-powerpc-specific

[Grant Likely]

On Sat, Sep 17, 2011 at 12:40 PM, Arnd Bergmann <arnd at arndb.de> wrote:
> On Saturday 17 September 2011 09:37:32 Grant Likely wrote:
>> What driver is normally used for versatile express pata?  This driver
>> is kind of legacy in that it was created when there was a split
>> between platform_device and of_platform_devices.  But that split was a
>> bad idea and the same driver should be used regardless of whether or
>> not DT is enabled.  pata_of_platform.c really should be removed.
>
> It normally uses the plain pata_platform.c driver.
>
> Note that the pata_of_platform driver is already just a shim on
> top of the regular pata_platform driver. They could easily be combined,
> but the current state is also ok, since there is very little code
> duplication.

A bunch of the code is actually redundant since the resource table is
no populated for DT devices.  I also see some directly references to
reg-shift and pio-mode property values without using be32_to_cpu(), so
that will also need to be fixed.  The of_irq_to_resource() and
of_address_to_resource() calls are now redundant since
platform_get_*() works for DT sourced platform device (with one quirk
for the electra-ide device).  Given that the conversion is straight
forward, I'd rather see pata_of_platform.c dropped and rolled into
pata_platform.c.  I've hacked together a patch to do so, but I've only
compile tested it.  Dave, if I send it to you, can you take care of
testing it?

Thanks,
g.