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Date: Tue, 22 Nov 2011 11:50:15 +0530 From: Viresh Kumar <viresh.kumar@...com> To: Vinod Koul <vinod.koul@...el.com> Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Armando VISCONTI <armando.visconti@...com>, Shiraz HASHIM <shiraz.hashim@...com>, Vipin KUMAR <vipin.kumar@...com>, Rajeev KUMAR <rajeev-dlh.kumar@...com>, Deepak SIKRI <deepak.sikri@...com>, Vipul Kumar SAMAR <vipulkumar.samar@...com>, Amit VIRDI <Amit.VIRDI@...com>, Pratyush ANAND <pratyush.anand@...com>, Bhupesh SHARMA <bhupesh.sharma@...com>, "viresh.linux@...il.com" <viresh.linux@...il.com>, Bhavna YADAV <bhavna.yadav@...com>, Vincenzo FRASCINO <Vincenzo.FRASCINO@...com>, Mirko GARDI <mirko.gardi@...com> Subject: Re: [PATCH] dmaengine/dw_dmac: Reconfigure interrupt and chan_cfg register on resume 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@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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