[PATCH 11/12] mfd: twl4030-irq: Return twl6030_mmc_card_detect IRQ for board setup

[tony@atomide.com (Tony Lindgren)]

* Felipe Balbi <balbi@ti.com> [120302 09:43]:
> Hi,
> 
> On Fri, Mar 02, 2012 at 05:50:23PM +0100, Benoit Cousson wrote:
> > Card detect IRQ from the TWL6030 used to be provided to the MMC
> > controller code using a statically allocated IRQ scheme:
> > 
> >   card_detect_irq = TWL6030_IRQ_BASE + MMCDETECT_INTR_OFFSET;
> > 
> > This is no longer valid in a SPARSE_IRQ context since there is no more
> > pre-defined TWL6030_IRQ_BASE.
> > 
> > Return the proper card detect IRQ value in the twl6030_mmc_card_detect_config
> > that will be called from the MMC controller.
> > 
> > Signed-off-by: Benoit Cousson <b-cousson@ti.com>
> > Cc: Felipe Balbi <balbi@ti.com>
> > Cc: Tony Lindgren <tony@atomide.com>
> > Cc: Rajendra Nayak <rnayak@ti.com>
> 
> Reviewed-by: Felipe Balbi <balbi@ti.com>
> 
> > ---
> >  drivers/mfd/twl6030-irq.c |    3 ++-
> >  1 files changed, 2 insertions(+), 1 deletions(-)
> > 
> > diff --git a/drivers/mfd/twl6030-irq.c b/drivers/mfd/twl6030-irq.c
> > index a1c7183..4a63de2 100644
> > --- a/drivers/mfd/twl6030-irq.c
> > +++ b/drivers/mfd/twl6030-irq.c
> > @@ -308,7 +308,8 @@ int twl6030_mmc_card_detect_config(void)
> >  									ret);
> >  		return ret;
> >  	}
> > -	return 0;
> > +
> > +	return twl6030_irq_base + MMCDETECT_INTR_OFFSET;
> >  }
> >  EXPORT_SYMBOL(twl6030_mmc_card_detect_config);
> 
> At some point this twl6030_mmc_card_detect_config() needs to vanish in
> favor of a better mechanism. Maybe passing the GPIO number an requiring
> the driver to request the GPIO, set its direction and use it as IRQ
> line.
> 
> the only problem would arise if we end up hooking the Card Detect pin to
> a real IRQ line, but then we can use a flag to differentiate.

I'm trying to leave out the need for this callback to pdata..
See mmc: omap_hsmmc: Simplify init for twl6030 MMC card detect
that does pretty much the same as Benoit's patch plus removes
the need for the callback.

Tony