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.
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 (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 | 42 +++
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/Kconfig | 11 +
drivers/usb/roles/Makefile | 1 +
drivers/usb/roles/class.c | 24 ++
drivers/usb/roles/typeb-conn-gpio.c | 295 ++++++++++++++++++
include/linux/usb/role.h | 8 +
14 files changed, 465 insertions(+), 7 deletions(-)
create mode 100644 Documentation/devicetree/bindings/usb/typeb-conn-gpio.txt
create mode 100644 drivers/usb/roles/typeb-conn-gpio.c
--
2.21.0
