Re: port-arm/52163 - support for gpio for Xscale

[Paul Goyette <paul%whooppee.com@localhost>]

On Wed, 17 May 2017, Paul Goyette wrote:

> On Tue, 16 May 2017, smesgr wrote:
>
> > Hi Paul,
> >
> > I have changed my local code according your suggestions. If gpio is 
> > available in the kernel configuration the kernel compiles and runs fine. If 
> > the gpio attachement in kernel configuration is removed however the linker 
> > complaining about unresolved symbol gpiobus_print. To be honest I already 
> > expected a linker error without NGPIO preprocessor directives. I'm not 
> > entirely sure how NetBSD make process is done, but I assume the 
> > sys/gpio/gpio.c isn't compiled if not configured.
> > I can add the NGPIO conditions again, but doubtful If the additional rescan 
> > is still useful.
>
> Hmmm.  I would have to think about this further.

Yeah, for now let's ignore the modular aspects.  Hopefully someone with 
more knowledge about the platform can review and import your original 
driver.

At some future time, we should probably extract gpiobus_print() (and any 
other routines specific to the attachment attribute) into a separate 
source file, rather than burying it in gpio.c  We might also need to 
clean up all the other drivers that "provide" the attribute.  So, we're 
not going to deal with it today.  :)


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