Defined register offsets and device configurations in structs to
allow more flexibility. This change will allow to support multiple
instances of a driver using a different bus. This is needed for the
BeagleBone Black.
Change-Id: I24e16faeea338c9a847941a846e6d4e49432525e
* let busy loops timeout.
* Start using interrupt handlers.
* Allocate the ramdisk only when used.
Change-Id: Ie08d66eefef3c8cd3ee16c04f74a9a50cc12b021
* Add dummy driver to allow independent testing of mmcblk.
* Always build the mmc driver to prevent breakage.
* Allow to specify the mmc driver to be used at load time.
Change-Id: I4e14b912fb8f3612e252864b53733968b23ac023
