Re: [PATCH] dmaengine/dw_dmac: Reconfigure interrupt and chan_cfgregister on resume

From: Viresh Kumar
Date: Tue Nov 22 2011 - 01:20:30 EST


On 11/22/2011 9:43 AM, Vinod Koul wrote:
> On Thu, 2011-11-17 at 16:01 +0530, Viresh Kumar wrote:
>> > In S2R all DMA registers are reset by hardware and thus they are required to be
> When are they reset, whenever you leave channel idle or once you come
> back from suspend?

Whenever we do S2R, many power islands are switched off and so DMAC controller looses
all its power. On resume, all registers are in their reset state.

--
viresh
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/