Re: [PATCH v2 3/3] drivers: cleanup Kconfig stuff

From: felipe.contreras@xxxxxxxxx
Date: Wed Oct 20 2010 - 04:48:04 EST


On Wed, Oct 20, 2010 at 3:13 AM, Kevin Hilman
<khilman@xxxxxxxxxxxxxxxxxxx> wrote:
> Tony Lindgren <tony@xxxxxxxxxxx> writes:
>> So if you have something that's needed on almost every omap,
>> you can select it there.
>
> One thing I don't like about this is that there is currently no way to
> 'select' as a module.
>
> In order to get to a minimal kernel, in theory, we don't need regulator,
> i2c, MFD, or twl4030* built in. ÂThey should all be built as modules.
> Yes, there are some assumptions made today that some of these things are
> built in, and then are used from init code, but that is broken.
>
> If someone is looking for a good omap-kernel-janitors project, I would
> suggest getting to a *really* minimal OMAP2+ kernel with everything
> possible built as modules to be a very good project.

Yes, one use-case would be to select things as modules by default only
if ARCH_OMAP2PLUS_TYPICAL is selected.

But not everyone needs many of these things, I expect to be able to do
ARCH_OMAP2PLUS_TYPICAL=n, and manually enable USB stuff
USB_MUSB_HDRC=y, without having to know the dependencies myself.

That was the idea: simplify the defconfigs so that they are truly
minimal (they boot), and then people can add whatever they need (like
USB).

--
Felipe Contreras
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