Messages in this thread | | | Date | Tue, 29 Jan 2013 20:57:24 +0530 | Subject | Re: [PATCH] dw_dmac: adjust slave_id accordingly to request line base | From | Viresh Kumar <> |
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On Tue, Jan 29, 2013 at 10:52 AM, Mika Westerberg <mika.westerberg@linux.intel.com> wrote: > We had a discusssion about this with Andy as well. The thing is that there > is no way in current resource to pass DMA request line numbers supported by > the controller to the driver in a generic way. We on the other hand have to > deal this somehow as we have a shared DMA controller on Lynxpoint where the > offset will start from 16 (but it might be something else as well). > > Is there something which limits the usage of IORESOUCE_DMA to be only > usable for ISA DMA channels?
Andy,
Why do we need this request_line_base? Why not program the actual value directly into the slave structure (base + offset)?
In case it is required, add it in platform data field or can add DT binding for it.
-- viresh
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