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[v2,0/4] Apple M1 USB4/Thunderbolt DART support

Message ID 20230228202132.4919-1-sven@svenpeter.dev (mailing list archive)
Headers show
Series Apple M1 USB4/Thunderbolt DART support | expand

Message

Sven Peter Feb. 28, 2023, 8:21 p.m. UTC 
Hi,

The M1 SoCs have a second slightly different variant of the regular
DART used for the USB4 PCIe ports. It supports 64 instead of 16 streams
which requires a minor change to the MMIO layout.
There seems to be no way to tell them apart from the regular DARTs by
just looking at the DART_PARAMs register so we have to add a new
compatible for those.

Change since v1:
  - apple,t8103-usb4-dart instead of apple,t8103-dart-usb4 as the
    compatible
  - collected Hector's tags

Best,

Sven

Sven Peter (4):
  dt-bindings: iommu: dart: Add t8103-usb4-dart compatible
  iommu: dart: Add flag to override bypass support
  iommu: dart: Write to all DART_T8020_STREAM_SELECT
  iommu: dart: Add support for t8103 USB4 DART

 .../devicetree/bindings/iommu/apple,dart.yaml |  1 +
 drivers/iommu/apple-dart.c                    | 42 ++++++++++++++++++-
 2 files changed, 41 insertions(+), 2 deletions(-)