Kconfig option for compile time build coverage (Was: Re: [PATCH] serial/efm32: add new driver)

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Hello,

On Fri, Dec 23, 2011 at 09:44:28PM +0100, Uwe Kleine-König wrote:
> On Fri, Dec 23, 2011 at 10:35:22AM +0000, Arnd Bergmann wrote:
> > On Thursday 22 December 2011, Uwe Kleine-König wrote:
> > > [...]
> > > +config SERIAL_EFM32_USART
> > > +	bool "EFM32 USART port."
> > > +	depends on ARCH_EFM32
> > > +	select SERIAL_CORE
> [...]
> > I would generally prefer not to make the driver depend on the
> > platform, so we can get better compile time coverage. I think a better
> > set of dependencies would be
> > 
> > 	depends on HAVE_CLK
> > 	depends on OF
> > 	default ARCH_EFM32
> I'd prefer something like:
> 
> 	depends on HAVE_CLK
> 	depends on ARCH_EFM32 || I_DO_BUILD_COVERAGE_TESTING
> 
> This would make it easier for Joe User to pick the right options for his
> kernel (assuming he found out to better keep I_DO_BUILD_COVERAGE_TESTING
> disabled). [...]
What do you think about this I_DO_BUILD_COVERAGE_TESTING option? It
would allow testers to get all possible options enabled (though there
will never be an EFM32 USART port on a non-EFM32 machine I guess) and
still users and distribution packagers would easily keep the option off
even without cluttering .config and {menu,n,x,whatever}config.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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