[PATCH v7 2/2] usb: dwc3: Add Google Tensor SoC DWC3 glue driver

[Greg Kroah-Hartman]

On Wed, Nov 19, 2025 at 09:37:48AM +0000, Roy Luo wrote:
> 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.
> 
> Acked-by: Thinh Nguyen <Thinh.Nguyen at synopsys.com>
> Co-developed-by: Joy Chakraborty <joychakr at google.com>
> Signed-off-by: Joy Chakraborty <joychakr at google.com>
> Co-developed-by: Naveen Kumar <mnkumar at google.com>
> Signed-off-by: Naveen Kumar <mnkumar at google.com>
> Signed-off-by: Roy Luo <royluo at google.com>
> ---
>  drivers/usb/dwc3/Kconfig       |  10 +
>  drivers/usb/dwc3/Makefile      |   1 +
>  drivers/usb/dwc3/dwc3-google.c | 628 +++++++++++++++++++++++++++++++++
>  3 files changed, 639 insertions(+)
>  create mode 100644 drivers/usb/dwc3/dwc3-google.c
> 
> diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
> index 4925d15084f8..bb0e4dc97da3 100644
> --- a/drivers/usb/dwc3/Kconfig
> +++ b/drivers/usb/dwc3/Kconfig
> @@ -200,4 +200,14 @@ config USB_DWC3_GENERIC_PLAT
>  	  the dwc3 child node in the device tree.
>  	  Say 'Y' or 'M' here if your platform integrates DWC3 in a similar way.
>  
> +config USB_DWC3_GOOGLE
> +	tristate "Google Platform"
> +	depends on OF && COMMON_CLK && RESET_CONTROLLER

No build testing?

> +	default n

This is always the default, no need to list it here.

> +	help
> +	  Support the DesignWare Core USB3 IP found on Google Tensor
> +	  SoCs, starting with the G5 generation. This driver includes
> +	  support for hibernation in host mode.
> +	  Say 'Y' or 'M' if you have one such device.

You forgot the module name :(

> +#define to_dwc3_google(d) container_of((d), struct dwc3_google, dwc)

container_of_const() please.


thanks,

greg k-h