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Sun, 26 Nov 2023 10:17:10 -0500 (EST) From: Sven Peter To: Hector Martin , Sven Peter Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Alyssa Rosenzweig , Joerg Roedel , Will Deacon , Robin Murphy , linux-arm-kernel@lists.infradead.org, asahi@lists.linux.dev, iommu@lists.linux.dev, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 0/3] Apple M1 USB4/Thunderbolt DART support Date: Sun, 26 Nov 2023 16:16:58 +0100 Message-Id: <20231126151701.16534-1-sven@svenpeter.dev> X-Mailer: git-send-email 2.39.3 (Apple Git-145) Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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. Changes since v3: none Changes since v2: - drop the manual bypass disable - added Rob's tag Changes since v1: - apple,t8103-usb4-dart instead of apple,t8103-dart-usb4 as the compatible - collected Hector's tags Best, Sven Sven Peter (3): dt-bindings: iommu: dart: Add t8103-usb4-dart compatible 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 | 35 +++++++++++++++++-- 2 files changed, 34 insertions(+), 2 deletions(-) Reviewed-by: Neal Gompa