Patchset adjusts the Tegra-specific portion of the Chipidea USB controller
to allow for the disabling of automatic PHY and USB controller
registration. This is achieved by adding the nvidia,external-control
property/flag. It does not affect any existing configurations, but it
allows the USB line to be registered or deregistered by an external
device — in this case, the modem.

Since Tegra USB PHY holds clock gating for controller PHY cannot be
handled by code Chipidea mechanism.

This patchset is a part of larger series aiming to bring XMM6260 modem
support for Tegra devices:
https://lore.kernel.org/lkml/20260511135703.62470-1-clamor95@gmail.com/ (local)

---
Changes in v2:
- separated Tegra USB into its own schema
- tegra_usb structure moved into tegra_usb_phy.h
---

Svyatoslav Ryhel (4):
  dt-bindings: usb: Move Tegra-specific Chipidea USB properties into a
    dedicated schema
  dt-bindings: usb: chipidea,usb2-tegra: Document
    nvidia,external-control property
  usb: chipidea: tegra: Avoid controller/PHY init if bus is externally
    controlled
  usb: chipidea: tegra: Expose tegra_usb structure

 .../bindings/usb/chipidea,usb2-tegra.yaml     | 95 +++++++++++++++++++
 .../devicetree/bindings/usb/ci-hdrc-usb2.yaml | 22 -----
 drivers/usb/chipidea/ci_hdrc_tegra.c          | 43 ++++-----
 include/linux/usb/tegra_usb_phy.h             | 15 +++
 4 files changed, 131 insertions(+), 44 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/usb/chipidea,usb2-tegra.yaml

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2.51.0