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Date: Tue, 9 Jul 2013 09:53:21 -0500 From: Nishanth Menon <nm@...com> To: Mark Brown <broonie@...nel.org> CC: <balbi@...com>, Sourav Poddar <sourav.poddar@...com>, <spi-devel-general@...ts.sourceforge.net>, <grant.likely@...aro.org>, <rnayak@...com>, <linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org> Subject: Re: [PATCHv3 2/3] drivers: spi: Add qspi flash controller 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@...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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