bus: fsl-mc: dpio: add DPIO driver overview document

add document describing the dpio driver and it's role, components
and major interfaces

Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com>
Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stuart Yoder 2017-03-13 15:01:57 -04:00 • committed by Greg Kroah-Hartman
commit 0e6437941e