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 USB GPIO based connection detection driver and try to replace the function provided by extcon-usb-gpio driver. v9 changes: 1. replace signed-off-by by suggested-by Heikki 2. add reviewed-by Linus 3. use class_find_device_by_fwnode() introduced by series [1] [1]: https://lore.kernel.org/patchwork/patch/1103630/ [v3,1/7] drivers: Introduce device lookup variants by name they are already in: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git/log/drivers/base/core.c?h=driver-core-next v8 changes: 1. rename the driver's name suggested by Heikki 2. move the driver from usb/roles/ into usb/common/ suggested by Heikki 3. introduce Kconfig for usb common core to add the new driver 4. modify binding of the driver 5. rename the subject title v7 changes: 1. [5/10]: add signed-off-by Chunfeng 2. [6/10]: add signed-off-by Chunfeng 3. [6/10]: depends on linux-next of Rafael's tree [1] 4. [7/10]: add signed-off-by Chunfeng and tested-by Biju 5. [9/10]: add tested-by Nagarjuna, and remove DEV_PMS_OPS suggested by Andy [1] https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git/log/?h=linux-next v6 changes: 1. merge [1] and [2] into this series 2. don't use graph anymore to find usb-role-switch 3. abandon [3] and introduce three patches (6, 7, 8 in this series) to rebuild APIs getting usb-role-switch [1]: [v3] dt-binding: usb: add usb-role-switch property https://patchwork.kernel.org/patch/10934835/ [2]: [v6,08/13] usb: roles: Introduce stubs for the exiting functions in role.h https://patchwork.kernel.org/patch/10909971/ [3]: [PATCH v5 4/6] usb: roles: add API to get usb_role_switch by node v5 changes: 1. remove linux/of.h and put usb_role_switch when error happens, suggested by Biju 2. treat Type-B connector as USB controller's child, but not as a virtual device, suggested by Rob 3. provide and use generic property "usb-role-switch", see [1], suggested by Rob Note: this series still depends on [2] [1]: [v3] dt-binding: usb: add usb-role-switch property https://patchwork.kernel.org/patch/10934835/ [2]: [v6,08/13] usb: roles: Introduce stubs for the exiting functions in role.h https://patchwork.kernel.org/patch/10909971/ v4 changes: 1. use switch_fwnode_match() to find fwnode suggested by Heikki 2. assign fwnode member of usb_role_switch struct suggested by Heikki 3. make [4/6] depend on [2] 3. remove linux/gpio.h suggested by Linus 4. put node when error happens [4/6] usb: roles: add API to get usb_role_switch by node [2] [v6,08/13] usb: roles: Introduce stubs for the exiting functions in role.h https://patchwork.kernel.org/patch/10909971/ 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 (8): dt-binding: usb: add usb-role-switch property dt-bindings: connector: add optional properties for Type-B dt-bindings: usb: add binding for USB GPIO based connection detection driver dt-bindings: usb: mtu3: add properties about USB Role Switch usb: roles: get usb-role-switch from parent usb: common: create Kconfig file usb: common: add USB GPIO based connection detection driver usb: mtu3: register a USB Role Switch for dual role mode Heikki Krogerus (2): device connection: Add fwnode_connection_find_match() usb: roles: Add fwnode_usb_role_switch_get() function Yu Chen (1): usb: roles: Introduce stubs for the exiting functions in role.h .../bindings/connector/usb-connector.txt | 14 + .../devicetree/bindings/usb/generic.txt | 4 + .../devicetree/bindings/usb/mediatek,mtu3.txt | 10 + .../devicetree/bindings/usb/usb-conn-gpio.txt | 31 ++ drivers/base/devcon.c | 43 ++- drivers/usb/Kconfig | 35 +-- drivers/usb/common/Kconfig | 51 ++++ drivers/usb/common/Makefile | 1 + drivers/usb/common/usb-conn-gpio.c | 284 ++++++++++++++++++ drivers/usb/mtu3/Kconfig | 1 + drivers/usb/mtu3/mtu3.h | 5 + drivers/usb/mtu3/mtu3_debugfs.c | 4 +- drivers/usb/mtu3/mtu3_dr.c | 48 ++- drivers/usb/mtu3/mtu3_dr.h | 6 +- drivers/usb/mtu3/mtu3_plat.c | 3 +- drivers/usb/roles/class.c | 41 ++- include/linux/device.h | 10 +- include/linux/usb/role.h | 37 +++ 18 files changed, 570 insertions(+), 58 deletions(-) create mode 100644 Documentation/devicetree/bindings/usb/usb-conn-gpio.txt create mode 100644 drivers/usb/common/Kconfig create mode 100644 drivers/usb/common/usb-conn-gpio.c -- 2.22.0
