linux-kernel - Re: Default Kconfig state for hw

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Message-ID: <4F9A91A8.4050608@atmel.com>
Date:	Fri, 27 Apr 2012 14:31:36 +0200
From:	Nicolas Ferre <nicolas.ferre@...el.com>
To:	Olof Johansson <olof@...om.net>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Arnd Bergmann <arnd@...db.de>, <balbi@...com>
CC:	Herbert Xu <herbert@...dor.apana.org.au>,
	Matt Mackall <mpm@...enic.com>, <linux-kernel@...r.kernel.org>
Subject: Re: Default Kconfig state for hw_random drivers

On 04/26/2012 04:17 PM, Olof Johansson :
> On Thu, Apr 26, 2012 at 4:42 AM, Mark Brown
> <broonie@...nsource.wolfsonmicro.com> wrote:
>> An Atmel hw_random driver just appeared in -next.  Since it's just a
>> regular platform device it has no dependencies on any particular
>> platform so following the behaviour of other hw_random drivers it's set
>> to default enabled if hw_random is enabled, even on non-Atmel platforms.
>>
>> This doesn't feel like the right thing to do - it'd mean that most of
>> the embedded RNGs would end up getting enabled by default which probably
>> isn't what we want.
> 
> Indeed, thanks for catching this. The driver isn't new but it had a
> previous dependency on just one AT91 chip family.
> 
> Looking at other options in the same Kconfig, it would be appropriate
> to make it depend on ARCH_AT91 instead.
> 
> Nicolas?

Hi,

I had the same kind of discussion with Felipe and Arnd in this thread:
http://thread.gmane.org/gmane.linux.ports.arm.kernel/122248/focus=122304

The conclusion came out after Arnd's strong arguments:
http://article.gmane.org/gmane.linux.ports.arm.kernel/122962

Maybe adding a "default" directive can be an valid option?

Best regards,
-- 
Nicolas Ferre
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