linux-kernel - Re: [PATCH] platform/x86: pmc_atom: Match all Beckhoff Automation baytrail boards with critclk

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Date:   Mon, 12 Apr 2021 10:39:03 +0000
From:   linux-kernel-dev <linux-kernel-dev@...khoff.com>
To:     "andy.shevchenko@...il.com" <andy.shevchenko@...il.com>
CC:     "hdegoede@...hat.com" <hdegoede@...hat.com>,
        "andriy.shevchenko@...ux.intel.com" 
        <andriy.shevchenko@...ux.intel.com>,
        "mgross@...ux.intel.com" <mgross@...ux.intel.com>,
        "platform-driver-x86@...r.kernel.org" 
        <platform-driver-x86@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] platform/x86: pmc_atom: Match all Beckhoff Automation
 baytrail boards with critclk_systems DMI table

On Mo, 2021-04-12 at 12:43 +0300, Andy Shevchenko wrote:
>
> On Mon, Apr 12, 2021 at 12:29 PM Steffen Dirkwinkel
> <linux-kernel-dev@...khoff.com> wrote:
> >
> > From: Steffen Dirkwinkel <s.dirkwinkel@...khoff.com>
> >
> > pmc_plt_clk* clocks are used for ethernet controllers so need to stay
> > turned on. This adds the affected board family to critclk_systems DMI
> > table so the clocks are marked as CLK_CRITICAL and not turned off.
> >
> > This replaces the previosly listed boards with a match for the whole
>
> "...previously..."
thanks

>
> > device family. There are new affected boards that would otherwise need
> > to be listed. There are only few unaffected boards in the family and
>
> "...only a few..."
will drop the phrase

>
> > having the clocks turned on is not an issue on those.
>
> "...not an issue."
Not an issue for these industrial PCs as sleep is an unusual use case.
Having no ethernet after boot/sleep is worse.

>
> > Fixes: 648e921888ad ("clk: x86: Stop marking clocks as CLK_IS_CRITICAL")
> > Signed-off-by: Steffen Dirkwinkel <s.dirkwinkel@...khoff.com>
>
> I'm afraid it's a bit too much. Is there any guarantee all the boards
> based on x86 will be Baytrail only?
>
Sorry, I guess I should make this clearer in the message.
All boards with "CBxx63" are Baytrail.


> --
> With Best Regards,
> Andy Shevchenko
>

Beckhoff Automation GmbH & Co. KG | Managing Director: Dipl. Phys. Hans Beckhoff Registered office: Verl, Germany | Register court: Guetersloh HRA 7075