linux-kernel - Re: [PATCH 01/14] gpio: pca953x: move suspend/resume to suspend_noirq/resume

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Date: Tue, 16 Jan 2024 09:43:33 +0200
From: Tony Lindgren <tony@...mide.com>
To: Thomas Richard <thomas.richard@...tlin.com>
Cc: 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>,
	Andi Shyti <andi.shyti@...nel.org>, Peter Rosin <peda@...ntia.se>,
	Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Tom Joseph <tjoseph@...ence.com>,
	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 01/14] gpio: pca953x: move suspend/resume to
 suspend_noirq/resume_noirq

* Thomas Richard <thomas.richard@...tlin.com> [240115 16:16]:
> Some IOs can be needed during suspend_noirq/resume_noirq.
> So move suspend/resume callbacks to noirq.

So have you checked that the pca953x_save_context() and restore works
this way? There's i2c traffic and regulators may sleep.. I wonder if
you instead just need to leave gpio-pca953x enabled in some cases
instead?

Regards,

Tony