IRQ handler touches info->edev, so if interrupt occurs before extcon
device initialization it can cause NULL pointer dereference. Doing extcon
initialization before IRQ handler registration fixes this problem.
Signed-off-by: NRobert Baldyga <r.baldyga@samsung.com>
Acked-by: NRoger Quadros <rogerq@ti.com>
Signed-off-by: NChanwoo Choi <cw00.choi@samsung.com>

This patch fixes the checkpatch warning about coding style.
Signed-off-by: NChanwoo Choi <cw00.choi@samsung.com>

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: NRoger Quadros <rogerq@ti.com>
Reviewed-by: NFelipe Balbi <balbi@ti.com>
Acked-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NChanwoo Choi <cw00.choi@samsung.com>