[PATCH v2 0/12] iommu/exynos: Fixes and Enhancements of System MMU driver with DT

[Cho KyongHo]

The current exynos-iommu(System MMU) driver does not work autonomously
since it is lack of support for power management of peripheral blocks.
For example, MFC device driver must ensure that its System MMU is disabled
before MFC block is power-down not to invalidate IOTLB in the System MMU
when I/O memory mapping is changed. Because A System MMU is resides in the
same H/W block, access to control registers of System MMU while the H/W
block is turned off must be prohibited.

This set of changes solves the above problem with setting each System MMUs
as the parent of the device which owns the System MMU to recieve the
information when the device is turned off or turned on.

Another big change to the driver is the support for devicetree.
The bindings for System MMU is described in
Documentation/devicetree/bindings/arm/samsung/system-mmu.txt

In addition, this patchset also includes several bug fixes and enhancements
of the current driver.

Change log:
v2:
- Split the patch to iommu/exynos into 9 patches
- Support for System MMU 3.3
- Some code compaction

Patch summary:
[PATCH v2 01/12] ARM: EXYNOS: remove system mmu initialization from arch/arm/ tree
[PATCH v2 02/12] ARM: EXYNOS: Add clk_ops for gating clocks of System MMU
[PATCH v2 03/12] ARM: EXYNOS: add System MMU definition to DT
[PATCH v2 04/12] iommu/exynos: support for device tree
[PATCH v2 05/12] iommu/exynos: pass version information from DT
[PATCH v2 06/12] iommu/exynos: allocate lv2 page table from own slab
[PATCH v2 07/12] iommu/exynos: change rwlock to spinlock
[PATCH v2 08/12] iommu/exynos: set System MMU as the parent of client device
[PATCH v2 09/12] iommu/exynos: add supoort for runtime pm and suspend/resume
[PATCH v2 10/12] iommu/exynos: add support for System MMU 3.2 and 3.3
[PATCH v2 11/12] iommu/exynos: add literal name of System MMU for debugging
[PATCH v2 12/12] iommu/exynos: add debugfs entries for System MMU

Diffstats:
 .../devicetree/bindings/arm/exynos/system-mmu.txt  |   86 ++
 arch/arm/boot/dts/exynos4210.dtsi                  |   96 ++
 arch/arm/boot/dts/exynos4x12.dtsi                  |  124 ++
 arch/arm/boot/dts/exynos5250.dtsi                  |  147 +-
 arch/arm/mach-exynos/Kconfig                       |    5 -
 arch/arm/mach-exynos/Makefile                      |    1 -
 arch/arm/mach-exynos/clock-exynos4.c               |   41 +-
 arch/arm/mach-exynos/clock-exynos4210.c            |    9 +-
 arch/arm/mach-exynos/clock-exynos4212.c            |   23 +-
 arch/arm/mach-exynos/clock-exynos5.c               |   87 +-
 arch/arm/mach-exynos/dev-sysmmu.c                  |  274 ----
 arch/arm/mach-exynos/include/mach/sysmmu.h         |   66 -
 arch/arm/mach-exynos/mach-exynos4-dt.c             |   34 +
 arch/arm/mach-exynos/mach-exynos5-dt.c             |   30 +
 drivers/iommu/Kconfig                              |    2 +-
 drivers/iommu/exynos-iommu.c                       | 1423 +++++++++++++++-----
 16 files changed, 1720 insertions(+), 728 deletions(-)