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From: Thomas Gleixner <tglx@linutronix.de>
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To: Marek =?utf-8?Q?Ma=C5=9Blanka?= <mmaslanka@google.com>
Cc: LKML <linux-kernel@vger.kernel.org>, Rajneesh Bhardwaj
 <irenic.rajneesh@gmail.com>, David E Box <david.e.box@intel.com>, Hans de
 Goede <hdegoede@redhat.com>, Ilpo =?utf-8?Q?J=C3=A4rvinen?=
 <ilpo.jarvinen@linux.intel.com>, John Stultz <jstultz@google.com>, Stephen
 Boyd <sboyd@kernel.org>, platform-driver-x86@vger.kernel.org
Subject: Re: [PATCH v3] platform/x86:intel/pmc: Enable the ACPI PM Timer to
 be turned off when suspended
In-Reply-To: <CAGcaFA2eXzzCVqG-DSWDb1gruV4FemRC3W+dgRub7GgcOyf7yQ@mail.gmail.com>
References: <CAGcaFA2sQNRo9UThN-C1NOLtGUJ3sKzc=pEC9wdDWMi501iLsA@mail.gmail.com>
 <20240730120546.1042515-1-mmaslanka@google.com> <87cymu7tgq.ffs@tglx>
 <CAGcaFA1HJBYacvDAkZAO9HNhT2dZO7OdgcBYb59p7OJkVqQ6Fw@mail.gmail.com>
 <87h6c55xnp.ffs@tglx>
 <CAGcaFA2eXzzCVqG-DSWDb1gruV4FemRC3W+dgRub7GgcOyf7yQ@mail.gmail.com>
Date: Wed, 31 Jul 2024 23:46:42 +0200
Message-ID: <87plqt44l9.ffs@tglx>
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On Wed, Jul 31 2024 at 23:41, Marek Ma=C5=9Blanka wrote:
> On Wed, Jul 31, 2024 at 6:33=E2=80=AFPM Thomas Gleixner <tglx@linutronix.=
de> wrote:
>> On Wed, Jul 31 2024 at 16:44, Marek Ma=C5=9Blanka wrote:
>> > Thanks. I'll try do this in that way. But I need to disable/enable
>> > ACPI PM timer only on suspend/resume, so I'll use suspend/resume
>> > callbacks.
>>
>> Why? What's the point of keeping it running when nothing uses it?
>>
> In case of Intel CPUs the watchdog (iTCO/wdat_wdt) is driven by ACPI PM
> Timer. But it may also be used by others that I don't know about, so I do=
n't
> want to disable it.

Fair enough.