Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754093Ab3GIOxf (ORCPT ); Tue, 9 Jul 2013 10:53:35 -0400 Received: from bear.ext.ti.com ([192.94.94.41]:53167 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753681Ab3GIOxd (ORCPT ); Tue, 9 Jul 2013 10:53:33 -0400 Date: Tue, 9 Jul 2013 09:53:21 -0500 From: Nishanth Menon To: Mark Brown CC: , Sourav Poddar , , , , , Subject: Re: [PATCHv3 2/3] drivers: spi: Add qspi flash controller Message-ID: <20130709145321.GA1680@kahuna> References: <1373290980-17883-1-git-send-email-sourav.poddar@ti.com> <1373290980-17883-3-git-send-email-sourav.poddar@ti.com> <20130708203330.GA28322@kahuna> <20130709065143.GC5552@arwen.pp.htv.fi> <51DC072F.40704@ti.com> <20130709144043.GV27646@sirena.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20130709144043.GV27646@sirena.org.uk> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1109 Lines: 27 On 15:40-20130709, Mark Brown wrote: > On Tue, Jul 09, 2013 at 07:50:55AM -0500, Nishanth Menon wrote: > > > with this input and looking closer, I think I see what you are saying now: > > dra7xxx_qspi_prepare_xfer -> does a pm_runtime_get_sync > > dra7xxx_qspi_unprepare_xfer -> does a pm_runtime_mark_last_busy, > > pm_runtime_put_autosuspend > > > In between these calls, you have the remaining xfer calls going on. > > we are assuming here that autosuspend timeout should be greater than > > the time to complete the worst case transfer. > > No, autosuspend will do nothing so long as there are references to the > device held. The effect of autosuspend is to delay power down after the > last reference has been dropped, otherwise things run normally. Thanks on the clarification. That concludes my confusion on the topic :). -- Regards, Nishanth Menon -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/