These changes allow a PHY driver to trigger a VBUS interrupt and
to provide the value of VBUS.
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NPhil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>