[v3 PATCH 0/6] add USB Type-B GPIO connector driver

[Chunfeng Yun]

Because the USB Connector is introduced and the requirement of
usb-connector.txt binding, the old way using extcon to support
USB Dual-Role switch is now deprecated, meanwhile there is no
available common driver when use Type-B connector, typically
using an input GPIO to detect USB ID pin.
This patch series introduce a Type-B GPIO connector driver and try
to replace the function provided by extcon-usb-gpio driver.

v3 changes:
  1. add GPIO direction, and use fixed-regulator for GPIO controlled
    VBUS regulator suggested by Rob;
  2. rebuild fwnode_usb_role_switch_get() suggested by Andy and Heikki
  3. treat the type-B connector as a virtual device;
  4. change file name of driver again
  5. select USB_ROLE_SWITCH in mtu3/Kconfig suggested by Heikki
  6. rename ssusb_mode_manual_switch() to ssusb_mode_switch()

v2 changes:
 1. make binding clear, and add a extra compatible suggested by Hans

Chunfeng Yun (6):
  dt-bindings: connector: add optional properties for Type-B
  dt-bindings: usb: add binding for Type-B GPIO connector driver
  dt-bindings: usb: mtu3: add properties about USB Role Switch
  usb: roles: add API to get usb_role_switch by node
  usb: roles: add USB Type-B GPIO connector driver
  usb: mtu3: register a USB Role Switch for dual role mode

 .../bindings/connector/usb-connector.txt      |  14 +
 .../devicetree/bindings/usb/mediatek,mtu3.txt |  10 +-
 .../bindings/usb/typeb-conn-gpio.txt          |  49 +++
 drivers/usb/mtu3/Kconfig                      |   1 +
 drivers/usb/mtu3/mtu3.h                       |   5 +
 drivers/usb/mtu3/mtu3_debugfs.c               |   4 +-
 drivers/usb/mtu3/mtu3_dr.c                    |  47 ++-
 drivers/usb/mtu3/mtu3_dr.h                    |   6 +-
 drivers/usb/mtu3/mtu3_plat.c                  |   3 +-
 drivers/usb/roles/Kconfig                     |  11 +
 drivers/usb/roles/Makefile                    |   1 +
 drivers/usb/roles/class.c                     |  31 ++
 drivers/usb/roles/typeb-conn-gpio.c           | 301 ++++++++++++++++++
 include/linux/usb/role.h                      |   2 +
 14 files changed, 476 insertions(+), 9 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/usb/typeb-conn-gpio.txt
 create mode 100644 drivers/usb/roles/typeb-conn-gpio.c

-- 
2.20.1