tree 130f479f79def7c72f81cf6ffd834a0c9c2bf82e
parent 90a8898187672afcd4f199c0430b7fc421b5a5fa
author Mark Kettenis <kettenis@openbsd.org> 1635001081 +0200
committer Tom Rini <trini@konsulko.com> 1635684404 -0400

iommu: Add IOMMU uclass

This uclass is intended to manage IOMMUs on systems where the
IOMMUs are not in bypass mode by default.  In that case U-Boot
cannot ignore the IOMMUs if it wants to use devices that need
to do DMA and sit behind such an IOMMU.

This initial IOMMU uclass implementation does not implement and
device ops and is intended for IOMMUs that have a bypass mode
that does not require address translation.  Support for IOMMUs
that do require address translation is planned and device ops
will be defined when support for such IOMMUs will be added.

Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
Reviewed-by: Simon Glass <sjg@chromium.org>