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References: <20240102-j7200-pcie-s2r-v1-0-84e55da52400@bootlin.com> <20240102-j7200-pcie-s2r-v1-3-84e55da52400@bootlin.com>
In-Reply-To: <20240102-j7200-pcie-s2r-v1-3-84e55da52400@bootlin.com>
From: Andy Shevchenko <andy.shevchenko@gmail.com>
Date: Mon, 15 Jan 2024 22:03:46 +0200
Message-ID: <CAHp75Vcr+pSjj+27WmW5GmC_QvpJu3E81C-GjxqdhrCAByevpQ@mail.gmail.com>
Subject: Re: [PATCH 03/14] i2c: omap: wakeup the controller during suspend callback
To: Thomas Richard <thomas.richard@bootlin.com>
Cc: Linus Walleij <linus.walleij@linaro.org>, Bartosz Golaszewski <brgl@bgdev.pl>, 
	Andy Shevchenko <andy@kernel.org>, Tony Lindgren <tony@atomide.com>, 
	Haojian Zhuang <haojian.zhuang@linaro.org>, Vignesh R <vigneshr@ti.com>, 
	Aaro Koskinen <aaro.koskinen@iki.fi>, Janusz Krzysztofik <jmkrzyszt@gmail.com>, 
	Andi Shyti <andi.shyti@kernel.org>, Peter Rosin <peda@axentia.se>, Vinod Koul <vkoul@kernel.org>, 
	Kishon Vijay Abraham I <kishon@kernel.org>, Philipp Zabel <p.zabel@pengutronix.de>, 
	Tom Joseph <tjoseph@cadence.com>, Lorenzo Pieralisi <lpieralisi@kernel.org>, 
	=?UTF-8?Q?Krzysztof_Wilczy=C5=84ski?= <kw@linux.com>, 
	Rob Herring <robh@kernel.org>, Bjorn Helgaas <bhelgaas@google.com>, linux-gpio@vger.kernel.org, 
	linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, 
	linux-omap@vger.kernel.org, linux-i2c@vger.kernel.org, 
	linux-phy@lists.infradead.org, linux-pci@vger.kernel.org, 
	gregory.clement@bootlin.com, theo.lebrun@bootlin.com, 
	thomas.petazzoni@bootlin.com, u-kumar1@ti.com
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On Mon, Jan 15, 2024 at 6:16=E2=80=AFPM Thomas Richard
<thomas.richard@bootlin.com> 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.

Same comment

->...callback...()

..

>  }
>
> +

Stray blank line is added.

> +static int omap_i2c_suspend(struct device *dev)

--=20
With Best Regards,
Andy Shevchenko