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

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Message-ID: <7af45968aa0f0909ba39eeac3b7fa4947b6e38a6.camel@beckhoff.com>
Date:   Mon, 12 Apr 2021 11:07:15 +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 13:54 +0300, Andy Shevchenko wrote:
> CAUTION: External Email!!
>
>
> On Mon, Apr 12, 2021 at 1:39 PM linux-kernel-dev
> <linux-kernel-dev@...khoff.com> wrote:
> > 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:
>
> ...
>
> > > 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.
>
> Exactly! And this supports my idea that this shouldn't be done like in
> this patch.
> Are you guaranteeing that *all x86-based* boards produced by your
> company will be Baytrail only?
> Above tells that the answer is rather "no". So, I think we can't apply
> this patch in its current form.

All boards with DMI_PRODUCT_FAMILY="CBxx63" are Baytrail boards. We do produce other x86 boards but the family
is exclusive to Baytrail.
I might be misunderstanding how the matching works. Does this match anything other than CBxx63?

 .matches = {
 DMI_MATCH(DMI_SYS_VENDOR, "Beckhoff Automation"),
DMI_MATCH(DMI_PRODUCT_FAMILY, "CBxx63"),
},

I can switch it to DMI_EXACT_MATCH but even substring matching works.

>
> --
> 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