usb: dwc3: Add Google Tensor SoC DWC3 glue driver
Add support for the DWC3 USB controller found on Google Tensor G5
(codename: laguna). The controller features dual-role functionality
and hibernation.
The primary focus is implementing hibernation support in host mode,
enabling the controller to enter a low-power state (D3). This is
particularly relevant during system power state transition and
runtime power management for power efficiency.
Highlights:
- Align suspend callback with dwc3_suspend_common() for deciding
between a full teardown and hibernation in host mode.
- Integration with `psw` (power switchable) and `top` power domains,
managing their states and device links to support hibernation.
- A notifier callback dwc3_google_usb_psw_pd_notifier() for
`psw` power domain events to manage controller state
transitions to/from D3.
- Coordination of the `non_sticky` reset during power state
transitions, asserting it on D3 entry and deasserting on D0 entry
in hibernation scenario.
- Handling of high-speed and super-speed PME interrupts
that are generated by remote wakeup during hibernation.
Co-developed-by: Joy Chakraborty <joychakr@google.com>
Signed-off-by: Joy Chakraborty <joychakr@google.com>
Co-developed-by: Naveen Kumar <mnkumar@google.com>
Signed-off-by: Naveen Kumar <mnkumar@google.com>
Reviewed-by: Peter Griffin <peter.griffin@linaro.org>
Signed-off-by: Roy Luo <royluo@google.com>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://patch.msgid.link/20251218-controller-v10-2-4047c9077274@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 files changed
