From: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Date: Fri, 3 Feb 2012 07:35:26 +0000 (+0900)
Subject: usb: gadget: pch_udc: Detecting VBUS through GPIO
X-Git-Tag: v3.4-rc1~184^2~22^2~39^2~28
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dd63180b758d5972fc90621af0741d5bfae1a684;p=pandora-kernel.git

usb: gadget: pch_udc: Detecting VBUS through GPIO

Problem:
 In USB Suspend, pch_udc handles 'disconnect'.

Root cause:
 The current pch_udc is not monitoring VBUS.
 When USB cable is disconnected, USB Device Controller generates
 an interrupt of USB Suspend.
 pch_udc cannot distinguish it is USB Suspend or disconnect.
 Therefore, pch_udc handles 'disconnect' after an interrupt of
 USB Suspend happend.

Solution:
 VBUS is detected through GPIO.
 After an interrupt produced USB Suspend, if VBUS is Low,
 pch_udc handles 'disconnect'.
 If VBUS is High, pch_udc handles 'suspend'.

Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---

Reading git-diff-tree failed