[PATCH] mmc: dw_mmc: fix dw_mci_get_cd

[Russell King - ARM Linux]

On Wed, Jan 15, 2014 at 02:59:59PM +0100, Arnd Bergmann wrote:
> On Wednesday 15 January 2014 21:56:26 zhangfei wrote:
> > However, in our board cd =0 when card is deteced while cd=1 when card is
> > removed.
> > In order to mmc_gpio_get_cd return 1, MMC_CAP2_CD_ACTIVE_HIGH has to be
> > set, as well as new property "caps2-mmc-cd-active-low".
> > 
> > --- a/Documentation/devicetree/bindings/mmc/synopsys-dw-mshc.txt
> > +++ b/Documentation/devicetree/bindings/mmc/synopsys-dw-mshc.txt
> > @@ -73,6 +73,8 @@ Optional properties:
> > +* caps2-mmc-cd-active-low: cd pin is low when card active
> > +
> > 
> > diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
> > +       if (of_find_property(np, "caps2-mmc-cd-active-low", NULL))
> > +               pdata->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH;
> > +
> 
> The MMC_CAP2_CD_ACTIVE_HIGH flag should only be required for
> legacy platforms. With DT parsing, you can normally specify
> the polarity of the GPIO line in the GPIO specifier in DT.

Since when?

-- 
FTTC broadband for 0.8mile line: 5.8Mbps down 500kbps up.  Estimation
in database were 13.1 to 19Mbit for a good line, about 7.5+ for a bad.
Estimate before purchase was "up to 13.2Mbit".