linux-kernel - Re: [PATCH v3 2/5] pwm: kona: Introduce Kona PWM controller support

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Message-ID: <CAAYSxhothsZp6k2pKnA4XdTKf06+_rw95GPGJqRb2=xP6gJPNQ@mail.gmail.com>
Date:	Thu, 20 Mar 2014 12:54:46 -0700
From:	Tim Kryger <tim.kryger@...aro.org>
To:	Thierry Reding <thierry.reding@...il.com>
Cc:	Matt Porter <mporter@...aro.org>, Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Rob Landley <rob@...dley.net>,
	Christian Daudt <bcm@...thebug.org>,
	Grant Likely <grant.likely@...aro.org>,
	Linux PWM List <linux-pwm@...r.kernel.org>,
	Device Tree List <devicetree@...r.kernel.org>,
	Linux Doc List <linux-doc@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Broadcom Kernel Feedback List 
	<bcm-kernel-feedback-list@...adcom.com>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 2/5] pwm: kona: Introduce Kona PWM controller support

On Thu, Mar 20, 2014 at 8:57 AM, Thierry Reding
<thierry.reding@...il.com> wrote:
> On Tue, Mar 18, 2014 at 04:47:36PM -0700, Tim Kryger wrote:
>> On Tue, Mar 18, 2014 at 2:52 PM, Thierry Reding
>> <thierry.reding@...il.com> wrote:
>> > On Wed, Mar 12, 2014 at 01:15:43PM -0700, Tim Kryger wrote:

>> >> +     tristate "Kona PWM support"
>> >> +     depends on ARCH_BCM_MOBILE
>> >> +     default y
>> >
>> > No "default y", please.
>>
>> Even though it depends on ARCH_BCM_MOBILE?  It seems like a reasonable
>> default.
>
> Well, that's only true until somebody decides to turn that dependency
> into something like:
>
>         depends on ARCH_BCM_MOBILE || COMPILE_TEST

Do you expect someone would actually make such a change?

>
>> These SoCs target mobile phones which almost always have a backlight
>> controlled by the PWM.
>
> And you can easily turn it on in bcm_defconfig and/or multi_v7_defconfig
> if you want it enabled "by default".

Except that is not what default means.

Having a sensible default value in the Kconfig is convenient and
enables savedefconfig to create minimal configuration files.

Are you firmly opposed to this?

Thanks Again,
Tim
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