Grant,
On 11/16/2010 11:24 PM, Grant Likely wrote:
On Tue, Nov 16, 2010 at 02:33:55PM -0600, Rob Herring wrote:
From: Rob Herring<rob.herr...@calxeda.com>
Various drivers require dma_mask to be valid, so it needs to be setup
when doing OF probing on ARM.
Signed-off-by: Rob Herring<rob.herr...@calxeda.com>
I'll let patches 6& 7 lay fallow for the moment. I'm not hugely fond
of the powerpc approach (which microblaze copies), but I haven't had a
chance to look for a better solution.
Looking at this some more, there's a couple of options I see.
Other buses (ISA, PCI, EISA) have a dma_mask in their struct. So perhaps
platform_device should just have a dma_mask field.
There are several examples of setting dma_mask = &coherent_dma_mask. I'm
not sure if this is considered correct. At least on ARM, I don't think
these would need to be different.
Another option would be using bus notifiers to set the dma_mask like
platform_data. But that doesn't seem like a good long term solution.
Rob
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