Re: [PATCHv3 2/3] drivers: spi: Add qspi flash controller

Nishanth Menon
2013-07-09T14:53:35Z

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