pata_of_platform.c cannot build on sparc

[David Miller]

From: Rob Herring <robherring2 at gmail.com>
Date: Wed, 21 Dec 2011 17:25:15 -0600

> On 12/21/2011 04:38 PM, David Miller wrote:
>> 
>> It depends upon CONFIG_OF_IRQ which not all CONFIG_OF platforms support,
>> in particular sparc does not support CONFIG_OF_PLATFORM because it
>> precomputes all IRQs at boot time when it scans the device tree so all
>> of the CONFIG_OF_IRQ infrastructure to probe and resolve IRQs at driver
>> probe time is wrong and completely unnecessary.
>> 
>> Add the proper dependencies so that pata_of_platform.c doesn't get
>> built on sparc.
>> 
>> CONFIG_OF_IRQ was severely misdesigned, it should just NOP out on
>> platforms where the architecture has the final IRQ values already like
>> sparc does.  But that's not how it was implemented at all, and now
>> we're starting to have all of these drivers get hard dependencies on
>> this mechanism and it's datastructures, and the resulting sparc build
>> failures from time to time.
>> 
>> Jeff, please push something like the following to Linus so that
>> sparc's allmodconfig builds again.  Thanks.
>> 
> 
> Really, drivers should no longer use of_irq_to_resource (or
> of_address_to_resource for that matter). The resources are setup by the
> core OF code. The patch I sent does this.

Thanks for taking care of this.