Add driver support for ESWIN EIC7700 SoC USB controller

From: Hang Cao <caohang@eswincomputing.com>

Add support for ESWIN EIC7700 USB driver controller.

We have removed dwc3-eic7700.c and added changes to dwc3-generic-plat.c.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202509160138.P7gRM9...

Changes in v4->v3:
- Updates:
  - Removed config option patch dependency from cover letter, because the patch
    was applied.
  - Remove dwc3-eic7700.c instead of dwc3-generic-plat.c.

- Updates: eswin,eic7700-usb.yaml
  - Add usb_en clock.
  - Add usb_rst reset.
  - Update eswin,hsp-sp-csr description.
  - Remove the last two unused items of eswin,hsp-sp-csr.

- Updates: dwc3-generic-plat.c
  - Add eswin,eic7700-dwc3 to the compatible table.
  - Add the dwc3_generic_match_data structure.
  - Add the eic7700_dwc3_bus_init function to initialize the bus.
  - Add the init_ops callback in the probe function.
- Link to V3: https://lore.kernel.org/all/20250915085329.2058-1-caohang...

Changes in v3->v2:
- Updates: eswin,eic7700-usb.yaml
  - Sort the attributes according to the DTS coding style.
  - Remove the #address-cells and #size-cells attributes.
  - Fold the child node into the parent.
  - Update commit message.

- Updates: dwc3-eic7700.c
  - Use dwc3 core as a library.
  - Add system and runtime pm.
  - Use pm_ptr and remove the __maybe_unused tags.
  - Add new author name
  - Add prepare and complete function
  - Update commit message.
- Link to V2: https://lore.kernel.org/lkml/20250730073953.1623-1-zhangs...

Changes in v2->v1:
- Updates: eswin,eic7700-usb.yaml
  - Drop the redundant descriptions.
  - Supplement the constraints of resets.
  - Replace "eswin,hsp_sp_csr" with "eswin,hsp-sp-csr"
    and add items description.
  - Drop numa-node-id, This is not necessary.
  - Add patternProperties and match the rules defined
    in the "snps,dwc3.yaml" file.
  - Add "#address-cells" "#size-cells".
  - Update the space indentation, remove the redundant labels,
    and sort the attributes according to the DTS encoding style.
  - Drop the "status = "disabled" attribute.
  - Update the common usb node names and fold the child
    nodes into the parent nodes.
  - The warning detected by the robot has been resolved.

- Updates: dwc3-eic7700.c
  - Remove dwc3_mode_show dwc3_mode_store dwc3_eswin_get_extcon_dev,
    dwc3_eswin_device_notifier and dwc3_eswin_host_notifier, usb role
    detection and switching are not supported.
  - Remove the hub-rst attribute, remove the dwc3_hub_rst_show and
    dwc3_hub_rst_store functions, this feature is not supported.
  - Use syscon_regmap_lookup_by_phandle_args instead of the
    syscon_regmap_lookup_by_phandle function.
  - Use dev_err_probe in probe function.
  - Drop mutex_lock, which is not required.
  - Remove clk_prepare_enable and of_clk_get, and manage multiple
    clocks using devm_clk_bulk_get_all_enabled.
  - Remove the device_init_wakeup related functions, which were
    used incorrectly.
  - Remove MODULE_ALIAS, which is used incorrectly.
  - The warning detected by the robot has been resolved.
- Link to V1: https://lore.kernel.org/lkml/20250516095237.1516-1-zhangs...

Hang Cao (2):
  dt-bindings: usb: Add ESWIN EIC7700 USB controller
  usb: dwc3: eic7700: Add EIC7700 USB driver

 .../bindings/usb/eswin,eic7700-usb.yaml       | 99 +++++++++++++++++++
 drivers/usb/dwc3/dwc3-generic-plat.c          | 58 +++++++++++
 2 files changed, 157 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/eswin,eic7700-usb.yaml

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2.34.1