linux-kernel - Re: [PATCH v5 01/11] gpio: pca953x: move suspend()/resume() to suspend_noirq()/resume

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Date: Tue, 23 Apr 2024 17:31:58 +0200
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Thomas Richard <thomas.richard@...tlin.com>
Cc: Andy Shevchenko <andy.shevchenko@...il.com>, Linus Walleij <linus.walleij@...aro.org>, 
	Bartosz Golaszewski <brgl@...ev.pl>, Tony Lindgren <tony@...mide.com>, Aaro Koskinen <aaro.koskinen@....fi>, 
	Janusz Krzysztofik <jmkrzyszt@...il.com>, Vignesh R <vigneshr@...com>, 
	Andi Shyti <andi.shyti@...nel.org>, Peter Rosin <peda@...ntia.se>, 
	Lorenzo Pieralisi <lpieralisi@...nel.org>, Krzysztof Wilczyński <kw@...ux.com>, 
	Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>, 
	Siddharth Vadapalli <s-vadapalli@...com>, linux-gpio@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org, 
	linux-i2c@...r.kernel.org, linux-pci@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, gregory.clement@...tlin.com, 
	theo.lebrun@...tlin.com, thomas.petazzoni@...tlin.com, u-kumar1@...com, 
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>, 
	Wolfram Sang <wsa+renesas@...g-engineering.com>, 
	Linux-Renesas <linux-renesas-soc@...r.kernel.org>
Subject: Re: [PATCH v5 01/11] gpio: pca953x: move suspend()/resume() to suspend_noirq()/resume_noirq()

Hi Thomas,

On Tue, Apr 23, 2024 at 12:53 PM Thomas Richard
<thomas.richard@...tlin.com> wrote:
> On 4/23/24 12:34, Andy Shevchenko wrote:
> > On Tue, Apr 23, 2024 at 12:42 PM Geert Uytterhoeven
> > <geert@...ux-m68k.org> wrote:
> >> On Tue, Apr 16, 2024 at 3:31 PM Thomas Richard
> >> <thomas.richard@...tlin.com> wrote:
> >
> > ...
> >
> >>         +i2c-rcar e66d8000.i2c: error -16 : 10000005
> >
> > It probably means that I²C host controller is already in power off
> > mode and can't serve anymore.
>
> Yes the i2c controller is already off.
> In fact it's the same issue I had with the i2c-omap driver.
> In suspend-noirq, the runtime pm is disabled, so you can't wakeup a
> device. More details available in this thread [1].
> So the trick is to wakeup the device during suspend (like I did for the
> i2c-omap driver [2].
>
> [1]
> https://lore.kernel.org/all/f68c9a54-0fde-4709-9d2f-0d23a049341b@bootlin.com/
> [2]
> https://lore.kernel.org/all/20240102-j7200-pcie-s2r-v5-2-4b8c46711ded@bootlin.com/
>
> I think the patch below should fix the issue.

Thanks, I gave that a try, but it doesn't make any difference.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68korg

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds