From: Mark Brown <broonie@kernel.org>
To: Nishanth Menon <nm@ti.com>
Cc: balbi@ti.com, Sourav Poddar <sourav.poddar@ti.com>,
spi-devel-general@lists.sourceforge.net, grant.likely@linaro.org,
rnayak@ti.com, linux-omap@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCHv3 2/3] drivers: spi: Add qspi flash controller
Date: Tue, 9 Jul 2013 15:40:43 +0100 [thread overview]
Message-ID: <20130709144043.GV27646@sirena.org.uk> (raw)
In-Reply-To: <51DC072F.40704@ti.com>
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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.
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next prev parent reply other threads:[~2013-07-09 14:40 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-08 13:42 [PATCH 0/3] spi changes and ti quad spi controller Sourav Poddar
2013-07-08 13:42 ` Sourav Poddar
2013-07-08 13:42 ` Sourav Poddar
2013-07-08 13:42 ` [RFC/PATCH 1/3] driver: spi: Modify core to compute the message length Sourav Poddar
2013-07-08 13:42 ` Sourav Poddar
2013-07-08 13:42 ` Sourav Poddar
2013-07-08 15:02 ` Mark Brown
2013-07-08 13:42 ` [PATCHv3 2/3] drivers: spi: Add qspi flash controller Sourav Poddar
2013-07-08 13:42 ` Sourav Poddar
2013-07-08 14:32 ` Felipe Balbi
2013-07-08 14:32 ` Felipe Balbi
2013-07-09 7:29 ` Sourav Poddar
2013-07-09 7:29 ` Sourav Poddar
2013-07-09 7:29 ` Sourav Poddar
2013-07-11 9:12 ` Sourav Poddar
2013-07-11 9:12 ` Sourav Poddar
2013-07-08 20:33 ` Nishanth Menon
2013-07-08 20:33 ` Nishanth Menon
2013-07-09 6:51 ` Felipe Balbi
2013-07-09 6:51 ` Felipe Balbi
2013-07-09 10:05 ` Mark Brown
2013-07-09 12:32 ` Nishanth Menon
2013-07-09 12:32 ` Nishanth Menon
2013-07-09 12:50 ` Nishanth Menon
2013-07-09 12:50 ` Nishanth Menon
2013-07-09 14:40 ` Mark Brown [this message]
2013-07-09 14:53 ` Nishanth Menon
2013-07-09 14:53 ` Nishanth Menon
2013-07-09 7:20 ` Sourav Poddar
2013-07-09 7:20 ` Sourav Poddar
2013-07-08 13:43 ` [RFC/PATCH 3/3] driver: spi: Add quad spi read support Sourav Poddar
2013-07-08 13:43 ` Sourav Poddar
2013-07-08 13:43 ` Sourav Poddar
2013-07-08 14:36 ` Felipe Balbi
2013-07-08 14:36 ` Felipe Balbi
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