[PATCH] omap2-beagle: Depend upon CONFIG_GPIO_TWL4030

[Felipe Balbi]

On Tue, Jan 18, 2011 at 08:51:52AM -0500, Ben Gamari wrote:
> On Tue, 18 Jan 2011 05:10:39 +0200, Felipe Balbi <balbi at ti.com> wrote:
> > NAK. This is totally bogus. The board doesn't really depend on
> > GPIO_TWL4030, the MMC driver does.
> > 
> I've looked a little more deeply into this and I'm not entirely
> convinced that what you claim is true. It seems that the only dependency
> that the MMC module _might_ have on the TWL4030 is for the LDOs, which I
> believe should be covered in the regulator driver, not GPIO.
> 
> In light of this, I think the use of the TWL's GPIO lines for MMC it
> might be a board specific design decision. In the case of the
> Beagleboard, they are only TWL GPIO used by the MMC configuration is for
> .gpio_cd but as far as I could see they could have chosen any GPIO for
> this. Am I missing something?

it's all true, still you making a board depend on a driver is inverting
the dependencies. If you don't enable TWL4030_GPIO, all what will happen
is that MMC won't work, but that's completely valid if I'm e.g.
debugging UART of USB.

The point is, being able to disable features I don't want on my kernel
image, is completely valid, if there's a compile breakage, then fix the
breakage but don't prevent the board from compiling.

-- 
balbi