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Date:   Tue, 8 Sep 2020 10:35:38 +0100
From:   Lee Jones <lee.jones@linaro.org>
To:     Andy Shevchenko <andy.shevchenko@gmail.com>
Cc:     Jonathan =?iso-8859-1?Q?Neusch=E4fer?= <j.neuschaefer@gmx.net>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
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        <u.kleine-koenig@pengutronix.de>,
        Alessandro Zummo <a.zummo@towertech.it>,
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        Sascha Hauer <s.hauer@pengutronix.de>,
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        Linus Walleij <linus.walleij@linaro.org>,
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Subject: Re: [PATCH v2 05/10] pwm: ntxec: Add driver for PWM function in
 Netronix EC
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On Tue, 08 Sep 2020, Andy Shevchenko wrote:

> On Tue, Sep 8, 2020 at 11:14 AM Lee Jones <lee.jones@linaro.org> wrote:
> > On Sat, 05 Sep 2020, Andy Shevchenko wrote:
> > > On Saturday, September 5, 2020, Jonathan Neuschäfer <j.neuschaefer@gmx.net>
> > > wrote:
> 
> ...
> 
> > > > +config PWM_NTXEC
> > > > +       tristate "Netronix embedded controller PWM support"
> > >
> > >
> > >
> > >
> > > > +       depends on MFD_NTXEC && OF
> > >
> > >
> > > I don’t see need to reduce test coverage and use of the driver by sticking
> > > with OF. Actually it’s not used.
> >
> > If the device is only known to boot with OF, then it's pointless
> > building it when !OF.
> 
> No, it's not. As I pointed out the (compilation) test coverage is better.

No, it's a waste of disk space.

Why would you knowingly compile something you know you can't use?

That's the whole point of COMPILE_TEST.

Note that when you want real coverage and you use `allyesconfig`
and/or `allmodconfig` then CONFIG_OF is also enabled on platforms
which support it.

> > If you want to increase test coverage enable
> > COMPILE_TEST instead.
> 
> It is one way to achieve that, yes;
> 
>        depends on OF || COMPILE_TEST
>        depends on MFD_NTXEC

This is better.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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