The msm_iommu.c driver currently works based on platform data.
A single master device can be connected to more than one iommu and multiple
contexts in each of the iommu. This association between master and iommus was
represented from platform data using parent/child devices. The master drivers
were responsible for attaching all of the iommus/context to a domain. Now the
platform data support is removed and DT support is added. The master/iommus are
added through generic iommu bindings.
This is essentially rework of the patch posted earlier by
Rob Clark <robdclark@xxxxxxxxx>. This series folds the changes in to the
existing driver with the addition of generic bindings.
http://www.spinics.net/lists/linux-arm-msm/msg10077.html
Tested this series on ifc6410 board.
[V6] After some discussions on patch 6 [1] from previous post,
it was concluded that the changes for using relaxed writes
in all places should not be a part of this series, so should
be moved it. So removed that patch and added Acked/Tested tags.
[1] https://patchwork.kernel.org/patch/9129231/
[V5] Changed the compatible binding name as per comments, added comments
for usage of barriers in patch 6.
[V4] Addressed comments for making the iommu compatible binding more soc
specific and updated the documentation for the iommu clocks.
[V3] Addressed comments to correct the usage
of the #iommu-cells binding, improve the flush_iotlb_range function,
added a new patch to use writel_relaxed for register access and split
up the documentation patch.
[V2] Adapted the driver to use generic ARMV7S short descriptor pagetable ops
and addressed comments.
[V1]
https://lists.linuxfoundation.org/pipermail/iommu/2015-August/014074.html
Sricharan R (6):
iommu/msm: Add DT adaptation
documentation: iommu: Add bindings for msm,iommu-v0 ip
iommu/msm: Move the contents from msm_iommu_dev.c to msm_iommu.c
iommu/msm: Add support for generic master bindings
iommu/msm: use generic ARMV7S short descriptor pagetable ops
iommu/msm: Remove driver BROKEN
.../devicetree/bindings/iommu/msm,iommu-v0.txt | 64 ++
drivers/iommu/Kconfig | 2 +-
drivers/iommu/Makefile | 2 +-
drivers/iommu/msm_iommu.c | 870 +++++++++++----------
drivers/iommu/msm_iommu.h | 73 +-
drivers/iommu/msm_iommu_dev.c | 381 ---------
6 files changed, 564 insertions(+), 828 deletions(-)
create mode 100644 Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt
delete mode 100644 drivers/iommu/msm_iommu_dev.c
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