2011/7/27 Nicolas Pitre [off-list ref]:

On Tue, 26 Jul 2011, Russell King - ARM Linux wrote:

quoted

I don't think there's any plans to break the:

linux/gpio.h -> asm/gpio.h -> mach/gpio.h

include path at the moment, as platforms do define ARCH_NR_GPIO,
which has to be done before asm-generic/gpiolib.h is included.

Well, this GPIO business is the biggest hurdle towards a single kernel
image that can support multiple SOCs at the moment, and the only one for
which I have no solution yet. ?Anything that could help removing
mach/gpio.h from asm/gpio.h would be welcome.

After reading all the following patches,

1. use CONFIG_PHYS_OFFSET to prepare for removal of a bunch of
<mach/memory.h> files

2. move from ARM_DMA_ZONE_SIZE to mdesc->dma_zone_size

3. convert boot_params to atag_offset

Have i lost anything for the work on 1 and 2? considering some
platforms need CONSISTENT_DMA_SIZE more than the default 2MB in
arch/arm/include/asm/memory.h, we can't remove all memory.h only by
defining CONFIG_PHYS_OFFSET and moving ARM_DMA_ZONE_SIZE to
mdesc->dma_zone_size. So CONSISTENT_DMA_SIZE should also be a left
issue except gpio.h.

Nicolas

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