MMU-401 is similar to MMU-400, but updated with limited ARMv8 support.
Signed-off-by: NRobin Murphy <robin.murphy@arm.com>
Signed-off-by: NWill Deacon <will.deacon@arm.com>

The ARM SMMU driver has supported chained SMMUs (i.e. SMMUs connected
back-to-back in series) via the smmu-parent property in device tree.
This was in anticipation of somebody building such a configuration,
however that seems not to be the case.

This patch removes the unused chained SMMU hack from the driver. We can
consider adding it back later if somebody decided they need it, but for
the time being it's just pointless mess that we're carrying in mainline.

Removal of the feature also makes migration to the generic IOMMU bindings
easier.
Signed-off-by: NWill Deacon <will.deacon@arm.com>

This patch adds descriptions for new properties of the device tree
binding for the ARM SMMU architecture. These properties control
arm-smmu driver options.

Cc: Grant Likely <grant.likely@linaro.org>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NAndreas Herrmann <andreas.herrmann@calxeda.com>
[will: removed device isolation property, as this has been dropped and
       fixed up spacing in documentation]
Signed-off-by: NWill Deacon <will.deacon@arm.com>

This patch adds a description of the device tree binding for the ARM
System MMU architecture.

Cc: Rob Herring <robherring2@gmail.com>
Cc: Andreas Herrmann <andreas.herrmann@calxeda.com>
Cc: Joerg Roedel <joro@8bytes.org>
Acked-by: NGrant Likely <grant.likely@linaro.org>
Signed-off-by: NWill Deacon <will.deacon@arm.com>
Acked-by: NAndreas Herrmann <andreas.herrmann@calxeda.com>
Signed-off-by: NJoerg Roedel <joro@8bytes.org>