Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.Prune svn:mergeinfo from the new branch, as nothing has been mergedhere.Additional commits post-branch will follow.Approved by: re (implicit)Sponsored by: The FreeBSD Foundation
Revert r298268 (Add optional chip_select/deselect methods).None of supported hardware do require that.
Add optional chip_select/deselect methods. This is requiredwhen we want to keep CS asserted for multiple transfers.
MFp4: Initial spibus support. Seems to be OK, but needs some polish. # someone should write a bit-bang spi parallel port interface :-)