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

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Date: Wed, 13 Mar 2024 01:48:21 +0100
From: Andi Shyti <andi.shyti@...nel.org>
To: Wolfram Sang <wsa@...nel.org>, Tony Lindgren <tony@...mide.com>, 
	Thomas Richard <thomas.richard@...tlin.com>, Linus Walleij <linus.walleij@...aro.org>, 
	Bartosz Golaszewski <brgl@...ev.pl>, Andy Shevchenko <andy@...nel.org>, 
	Haojian Zhuang <haojian.zhuang@...aro.org>, Vignesh R <vigneshr@...com>, 
	Aaro Koskinen <aaro.koskinen@....fi>, Janusz Krzysztofik <jmkrzyszt@...il.com>, 
	Peter Rosin <peda@...ntia.se>, Vinod Koul <vkoul@...nel.org>, 
	Kishon Vijay Abraham I <kishon@...nel.org>, Philipp Zabel <p.zabel@...gutronix.de>, 
	Lorenzo Pieralisi <lpieralisi@...nel.org>, Krzysztof Wilczyński <kw@...ux.com>, 
	Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>, linux-gpio@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org, 
	linux-i2c@...r.kernel.org, linux-phy@...ts.infradead.org, linux-pci@...r.kernel.org, 
	gregory.clement@...tlin.com, theo.lebrun@...tlin.com, thomas.petazzoni@...tlin.com, 
	u-kumar1@...com
Subject: Re: [PATCH v4 03/18] i2c: omap: wakeup the controller during
 suspend() callback

Hi Wolfram,

On Tue, Mar 12, 2024 at 09:03:27AM +0100, Wolfram Sang wrote:
> On Fri, Mar 08, 2024 at 10:42:40AM +0200, Tony Lindgren wrote:
> > * Thomas Richard <thomas.richard@...tlin.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@...mide.com>
> 
> I fully trust Tony and I assume that this series should go in via some
> other tree than I2C. So:
> 
> Acked-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
> 
> Andi, do you agree?

Agree... but who is going to take this? Eventually I can just
this one.

Andi