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. This patch series introduce a Type-B connector driver and try to replace the function provided by extcon-usb-gpio driver. The main purpose of the patches is also to solve the Type-B connector problem encountered in [1]. [1]: https://patchwork.kernel.org/patch/10819377/ Chunfeng Yun (5): dt-bindings: connector: add optional properties for Type-B 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 connector driver usb: mtu3: register a USB Role Switch for Dual-Role mode .../bindings/connector/usb-connector.txt | 10 + .../devicetree/bindings/usb/mediatek,mtu3.txt | 10 +- drivers/usb/mtu3/mtu3.h | 5 + drivers/usb/mtu3/mtu3_dr.c | 50 ++- drivers/usb/mtu3/mtu3_plat.c | 3 +- drivers/usb/roles/Kconfig | 14 + drivers/usb/roles/Makefile | 1 + drivers/usb/roles/class.c | 30 ++ drivers/usb/roles/usb-b-connector.c | 285 ++++++++++++++++++ include/linux/usb/role.h | 1 + 10 files changed, 403 insertions(+), 6 deletions(-) create mode 100644 drivers/usb/roles/usb-b-connector.c -- 2.20.1
