[6/7 v2] usb: otg: TWL6030 Save the last event in otg_transceiver

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From: Kalliguddi, Hema <hemahk@xxxxxx>

Save the last event in the otg_transceiver so that it can used in the
musb driver and gadget driver to configure the musb and enable the 
vbus for host mode and OTG mode, if the device is connected during boot.

Signed-off-by: Hema HK <hemahk@xxxxxx>
Cc: Felipe Balbi <balbi@xxxxxx>

---
[Reusing some part of the patch[1] posted by Arnaud Mandy]
[1] http://permalink.gmane.org/gmane.linux.usb.general/37123
---
 drivers/usb/otg/twl6030-usb.c |    3 +++
 include/linux/usb/otg.h       |    1 +
 2 files changed, 4 insertions(+)

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Index: linux-2.6/drivers/usb/otg/twl6030-usb.c
===================================================================
--- linux-2.6.orig/drivers/usb/otg/twl6030-usb.c
+++ linux-2.6/drivers/usb/otg/twl6030-usb.c
@@ -265,11 +265,13 @@ static irqreturn_t twl6030_usb_irq(int i
 			twl->otg.default_a = false;
 			twl->otg.state = OTG_STATE_B_IDLE;
 			twl->linkstat = status;
+			twl->otg.last_event = status;
 			blocking_notifier_call_chain(&twl->otg.notifier,
 						status, twl->otg.gadget);
 		} else {
 			status = USB_EVENT_NONE;
 			twl->linkstat = status;
+			twl->otg.last_event = status;
 			blocking_notifier_call_chain(&twl->otg.notifier,
 						status, twl->otg.gadget);
 			if (twl->asleep) {
@@ -302,6 +304,7 @@ static irqreturn_t twl6030_usbotg_irq(in
 		twl->otg.default_a = true;
 		twl->otg.state = OTG_STATE_A_IDLE;
 		twl->linkstat = status;
+		twl->otg.last_event = status;
 		blocking_notifier_call_chain(&twl->otg.notifier, status,
 							twl->otg.gadget);
 	} else  {
Index: linux-2.6/include/linux/usb/otg.h
===================================================================
--- linux-2.6.orig/include/linux/usb/otg.h
+++ linux-2.6/include/linux/usb/otg.h
@@ -66,6 +66,7 @@ struct otg_transceiver {
 
 	u8			default_a;
 	enum usb_otg_state	state;
+	enum usb_xceiv_events	last_event;
 
 	struct usb_bus		*host;
 	struct usb_gadget	*gadget;
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