This patchset adds usb5744 SMBus support in onboard usb driver.

Changes for v6:
- Return -ENODEV in _i2c_init() if I2C_CONFIG is not defined.

Changes for v5:
- Drop Kconfig I2C_CONFIG dependency and instead put the _i2c_init()
  implementation inside IS_ENABLED(CONFIG_I2C) check.

Changes for v4:
- Fix error: implicit declaration of function 'i2c_smbus_*' APIs by
  introducing a kconfig dependency on I2C_CONFIG. This error is reported
  by kernel test on v3 series and usb:usb-testing 20/25 branch.
  https://lore.kernel.org/all/2024082503-uncoated-chaperone-7f70@gregkh

Changes for v3:
- Modified power_on_delay_us comment.
- Add comment for UDC suspend sequence.
- Drop USB5744_CREG_MEM_NBYTES and USB5744_CREG_NBYTES and replace
  it with literal + comment.
- Move microchip defines to source file.

Changes in v2:
- Fix subsystem "usb: misc: onboard_usb_dev:..."
- Change implementation from introducing onboard_dev_i2c_init
  func pointer and do i2c initialization based on compatible string.
  This is to make onboard_dev_5744_i2c_init() as static.
- Use #define for different register bits instead of magic values.
- Use err_power_off label name.
- Modified commit description to be in sync with v2 changes.
- Move power on reset delay to separate patch.

Radhey Shyam Pandey (2):
  usb: misc: onboard_dev: extend platform data to add power on delay
    field
  usb: misc: onboard_usb_dev: add Microchip usb5744 SMBus programming
    support

 drivers/usb/misc/onboard_usb_dev.c | 78 ++++++++++++++++++++++++++++++
 drivers/usb/misc/onboard_usb_dev.h |  2 +
 2 files changed, 80 insertions(+)

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2.34.1