iommu/msm: Add DT adaptation and generic bindings support

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 <[email protected]>. 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.

[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 (7):
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: Use writel_relaxed and add a barrier 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                          | 885 +++++++++++----------
  drivers/iommu/msm_iommu.h                          |  73 +-
  drivers/iommu/msm_iommu_dev.c                      | 381 ---------
  drivers/iommu/msm_iommu_hw-8xxx.h                  | 109 +--
  7 files changed, 636 insertions(+), 880 deletions(-)

create mode 100644 Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt delete mode 100644 drivers/iommu/msm_iommu_dev.c