Hi,

The CIO blocks used for USB4/Thunderbolt on Apple Silicon SoCs have a
reset inside the power manager that has to be deasserted before their
co-processor can be booted. On t8103 and t8112 each port comes with a
dedicated register page while t600x and t602x use a single register
with one request bit per port shared by all ports of a die in the
middle of the PMGR MMIO region.

The first patch adds the dt-binding, the second one the driver and the
last one the device tree nodes for all SoCs. This will be used by the
upcoming USB4/Thunderbolt series to start the host routers before
booting their co-processors.

Best,

Sven

---
Sven Peter (3):
      dt-bindings: reset: Add Apple SoC CIO reset
      reset: Add Apple SoC CIO reset driver
      arm64: dts: apple: Add CIO reset controllers

 .../devicetree/bindings/arm/apple/apple,pmgr.yaml  |   6 +
 .../bindings/reset/apple,t8103-cio-reset.yaml      |  74 +++++++++
 MAINTAINERS                                        |   2 +
 arch/arm64/boot/dts/apple/t600x-dieX.dtsi          |   8 +-
 arch/arm64/boot/dts/apple/t602x-dieX.dtsi          |   8 +-
 arch/arm64/boot/dts/apple/t8103.dtsi               |   6 +
 arch/arm64/boot/dts/apple/t8112.dtsi               |   6 +
 drivers/reset/Kconfig                              |  10 ++
 drivers/reset/Makefile                             |   1 +
 drivers/reset/reset-apple-cio.c                    | 182 +++++++++++++++++++++
 10 files changed, 301 insertions(+), 2 deletions(-)
---
base-commit: dc59e4fea9d83f03bad6bddf3fa2e52491777482
change-id: 20260809-b4-cio-reset-aa3fb04bad9e

Best regards,
--  
Sven Peter <sven@kernel.org>