linux-kernel - Re: [PATCH 1/3] watchdog: make Siemens Simatic watchdog driver default on platform

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Message-ID: <20230719091816.6661d535@md1za8fc.ad001.siemens.net>
Date:   Wed, 19 Jul 2023 09:18:16 +0200
From:   Henning Schild <henning.schild@...mens.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Lee Jones <lee@...nel.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        linux-kernel@...r.kernel.org, linux-leds@...r.kernel.org,
        platform-driver-x86@...r.kernel.org,
        linux-watchdog@...r.kernel.org, Pavel Machek <pavel@....cz>,
        Mark Gross <markgross@...nel.org>,
        Tobias Schaffner <tobias.schaffner@...mens.com>
Subject: Re: [PATCH 1/3] watchdog: make Siemens Simatic watchdog driver
 default on platform

Am Tue, 18 Jul 2023 08:10:09 -0700
schrieb Guenter Roeck <linux@...ck-us.net>:

> On 7/18/23 07:42, Henning Schild wrote:
> > Am Tue, 18 Jul 2023 17:20:48 +0300
> > schrieb Andy Shevchenko <andriy.shevchenko@...ux.intel.com>:
> >   
> >> On Tue, Jul 18, 2023 at 12:52:11PM +0200, Henning Schild wrote:  
> >>> If a user did choose to enable Siemens Simatic platform support
> >>> they likely want that driver to be enabled without having to flip
> >>> more config switches. So we make the watchdog driver config switch
> >>> default to the platform driver switches value.  
> >>
> >> A nit-pick below.
> >>
> >> ...
> >>  
> >>>   config SIEMENS_SIMATIC_IPC_WDT
> >>>   	tristate "Siemens Simatic IPC Watchdog"
> >>>   	depends on SIEMENS_SIMATIC_IPC  
> >>  
> >>> +	default SIEMENS_SIMATIC_IPC  
> >>
> >> It's more natural to group tristate and default, vs. depends and
> >> select.  
> > 
> > Will be ignored unless maintainer insists.
> >   
> 
> Maintainer wants to know why "default SIEMENS_SIMATIC_IPC" is needed
> or warranted instead of the much simpler and easier to understand
> "default y".

I thought a "default y" or "default m" was maybe not the best idea for
a platform that is not super common. That is why i did not dare to even
think about defaulting any of the Simatic stuff to not-no.

But it seems that this would be ok after all. And i would be very happy
to do so because it means less work on distro configs.

SIEMENS_SIMATIC_IPC_WDT will drive a platform device which gets
registered by SIEMENS_SIMATIC_IPC and nothing else. That is why
"default SIEMENS_SIMATIC_IPC" was chosen.

But if i may i would change that to "default m", not "y" because there
is an out of tree driver package which if installed on top, should be
able to override the in-tree drivers.

So i will go ahead and make that one "default m"

regards,
Henning

> Guenter
>