[v3,0/3] usb: typec: ucsi: add support for stm32g0

Message

Fabrice Gasnier July 13, 2022, 12:08 p.m. UTC

STM32G0 provides an integrated USB Type-C and power delivery interface [1].
It can be programmed with a firmware [2] to act as a PPM. Currently it
implements UCSI protocol over I2C interface. A GPIO is used as an interrupt
line.

This series adds a driver to support it, including:
- dt-bindings documentation
- optional STM32G0 firmware control and update, over a secondary I2C address
- power management

[1] https://wiki.st.com/stm32mcu/wiki/Introduction_to_USB_Power_Delivery_with_STM32
[2] https://github.com/STMicroelectronics/x-cube-ucsi

Changes in v3:
- Add connector to the required properties as pointed out by Krzysztof.
- PM support squashed as suggested by Heikki (hence removed patch 3)

Changes in v2:
- Krzysztof's review comments on dt-bindings: update commit message, use ports,
  use unevaluatedProperties: false for usb-connector schema, define maxItems
  for power-domains, adopt generic node names, remove quotes.
- Christophe's comments on driver:
  use kmalloc instead of kzalloc
  Use-after-free of buf: directly print the offset

Fabrice Gasnier (3):
  dt-bindings: usb: typec: add bindings for stm32g0 controller
  usb: typec: ucsi: stm32g0: add support for stm32g0 controller
  usb: typec: ucsi: stm32g0: add bootloader support

 .../bindings/usb/st,typec-stm32g0.yaml        |  91 ++
 drivers/usb/typec/ucsi/Kconfig                |  10 +
 drivers/usb/typec/ucsi/Makefile               |   1 +
 drivers/usb/typec/ucsi/ucsi_stm32g0.c         | 777 ++++++++++++++++++
 4 files changed, 879 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/st,typec-stm32g0.yaml
 create mode 100644 drivers/usb/typec/ucsi/ucsi_stm32g0.c