extcon: usb-gpio: Introduce gpio usb extcon driver
authorRoger Quadros <rogerq@ti.com>
Mon, 2 Feb 2015 10:21:59 +0000 (12:21 +0200)
committerChanwoo Choi <cw00.choi@samsung.com>
Tue, 24 Feb 2015 00:00:53 +0000 (09:00 +0900)
commite52817faae359ce95c93c2b6eb88b16d4b430181
treeb8eda5c5b308e7ce26eac18638456a40e4f2d648
parent4c883abee08b13d7fac5e672159575bb7a3365a6
extcon: usb-gpio: Introduce gpio usb extcon driver

This driver observes the USB ID pin connected over a GPIO and
updates the USB cable extcon states accordingly.

The existing GPIO extcon driver is not suitable for this purpose
as it needs to be taught to understand USB cable states and it
can't handle more than one cable per instance.

For the USB case we need to handle 2 cable states.
1) USB (attach/detach)
2) USB-HOST (attach/detach)

This driver can be easily updated in the future to handle VBUS
events in case it happens to be available on GPIO for any platform.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Documentation/devicetree/bindings/extcon/extcon-usb-gpio.txt [new file with mode: 0644]
drivers/extcon/Kconfig
drivers/extcon/Makefile
drivers/extcon/extcon-usb-gpio.c [new file with mode: 0644]