Messages in this thread | | | Date | Wed, 13 Mar 2024 01:37:35 +0100 | From | Andi Shyti <> | Subject | Re: [PATCH v4 03/18] i2c: omap: wakeup the controller during suspend() callback |
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Hi Thomas,
On Mon, Mar 04, 2024 at 04:35:46PM +0100, Thomas Richard wrote: > A device may need the controller up during suspend_noirq() or > resume_noirq(). > But if the controller is autosuspended, there is no way to wakeup it during > suspend_noirq() or resume_noirq() because runtime pm is disabled at this > time. > > The suspend() callback wakes up the controller, so it is available until > its suspend_noirq() callback (pm_runtime_force_suspend()). > During the resume, it's restored by resume_noirq() callback > (pm_runtime_force_resume()). Then resume() callback enables autosuspend. > > So the controller is up during a little time slot in suspend and resume > sequences even if it's not used. > > Signed-off-by: Thomas Richard <thomas.richard@bootlin.com>
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Thanks, Andi
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