usb: gadget: pch_udc: Detecting VBUS through GPIO with interrupt
Problem:
pch_udc continues operation even if VBUS becomes Low.
pch_udc performs D+ pulling up before VBUS becomes High.
USB device should be controlled according to VBUS state.
Root cause:
The current pch_udc is not always monitoring VBUS.
Solution:
The change of VBUS is detected using an interrupt of GPIO.
If VBUS became Low, pch_udc handles 'disconnect'.
After VBUS became High, a pull improves D+, and pch_udc
handles 'connect'.
[ balbi@ti.com : make it actually compile ]
Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
1 file changed