linux-kernel - Re: [Bug 212379] AMD GPIO chip IRQs stops working (ELN4690, WCOM51C7, BMA250E)

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Date:   Thu, 29 Apr 2021 16:31:18 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Borislav Petkov <bp@...en8.de>, Coiby Xu <coiby.xu@...il.com>,
        Ken Xue <Ken.Xue@....com>,
        Nehal Shah <Nehal-bakulchandra.Shah@....com>,
        Shyam Sundar S K <Shyam-sundar.S-k@....com>,
        Daniel Drake <drake@...lessm.com>,
        vectorflaredesigns@...il.com,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Hans de Goede <hdegoede@...hat.com>
Subject: Re: [Bug 212379] AMD GPIO chip IRQs stops working (ELN4690, WCOM51C7, BMA250E)

> > > Grepping through the tree, "amd_gpio" sounds like
> > > drivers/pinctrl/pinctrl-amd.c so maybe Linus might have an idea, CCed.
> > >
> > > @Linus, the bugzilla entry has some more info on what happens.

I have no clue, someone with deeper understanding of AMDs bridges
and stuff need to look at this. Since it dies after a while I would
suspect power management by the BIOS. (Off the top of my head.)
SInce I guess these systems use BIOS ACPI for all PM.

If someone from AMD could pick up this bug, that would be great.

Yours,
Linus Walleij