On Mon, Nov 03, 2014 at 11:32:23AM +0200, Igor Grinberg wrote: > Switch the default CD GPIO polarity to active low. > > The current hsmmc driver assumption that the CD GPIO is active high, but > in the real hardware, usually the opposite holds. > The usual SD card socket has a mechanical switch which is grounded as > soon as a card is inserted. > Of course there might be some board logic which inverts the signal, but > as far as current users are concerned, there is no such logic. > > Current U-Boot users either not using the CD functionality, or have a > different way (e.g. external to SoC GPIO controller) for checking the > card presence. > > This patch also brings the polarity assumption in line with the Linux > kernel and adds appropriate comments. > > This patch also might spare issues once the TWL GPIO driver will be > converted to the DM. > > Signed-off-by: Igor Grinberg <grinb...@compulab.co.il> > Cc: Pantelis Antoniou <pa...@antoniou-consulting.com> > Cc: Dmitry Lifshitz <lifsh...@compulab.co.il>
Reviewed-by: Tom Rini <tr...@ti.com> -- Tom
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