usb: phy: ab8500-usb: update irq handling code

Update irq handling code to notify all possible link status changes of
AB8500 and AB8505 to the ux500-musb glue driver.  The additional event
codes will be used for pm-runtime implementation, and are defined in a
separate ux500-specific header.

This also modify the irq registration code to use devm_* helpers and
drop all non necessary fail path code.
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/musb/ux500.c

@@ -26,6 +26,7 @@
 #include <linux/err.h>
 #include <linux/io.h>
 #include <linux/platform_device.h>
+#include <linux/usb/musb-ux500.h>
 
 #include "musb_core.h"
 
@@ -107,15 +108,15 @@ static int musb_otg_notifications(struct notifier_block *nb,
 			event, usb_otg_state_string(musb->xceiv->state));
 
 	switch (event) {
-	case USB_EVENT_ID:
+	case UX500_MUSB_ID:
 		dev_dbg(musb->controller, "ID GND\n");
 		ux500_musb_set_vbus(musb, 1);
 		break;
-	case USB_EVENT_VBUS:
+	case UX500_MUSB_VBUS:
 		dev_dbg(musb->controller, "VBUS Connect\n");
 		ux500_musb_set_vbus(musb, 0);
 		break;
-	case USB_EVENT_NONE:
+	case UX500_MUSB_NONE:
 		dev_dbg(musb->controller, "VBUS Disconnect\n");
 		if (is_host_active(musb))
 			ux500_musb_set_vbus(musb, 0);

include/linux/usb/musb-ux500.h

+/*
+ * Copyright (C) 2013 ST-Ericsson AB
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MUSB_UX500_H__
+#define __MUSB_UX500_H__
+
+enum ux500_musb_vbus_id_status {
+	UX500_MUSB_NONE = 0,
+	UX500_MUSB_VBUS,
+	UX500_MUSB_ID,
+	UX500_MUSB_CHARGER,
+	UX500_MUSB_ENUMERATED,
+	UX500_MUSB_RIDA,
+	UX500_MUSB_RIDB,
+	UX500_MUSB_RIDC,
+	UX500_MUSB_PREPARE,
+	UX500_MUSB_CLEAN,
+};
+
+#endif	/* __MUSB_UX500_H__ */