[PATCH v4 03/18] i2c: omap: wakeup the controller during suspend() callback

Tony Lindgren tony at atomide.com
Fri Mar 8 00:42:40 PST 2024


* Thomas Richard <thomas.richard at bootlin.com> [240304 15:36]:
> 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.

Reviewed-by: Tony Lindgren <tony at atomide.com>



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