linux-kernel - [PATCH v1 8/8] usb: otg: palmas-usb: fix cold plug issue

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Date:	Fri, 25 Jan 2013 08:42:31 +0530
From:	Kishon Vijay Abraham I <kishon@...com>
To:	<rob.herring@...xeda.com>, <rob@...dley.net>, <balbi@...com>,
	<sameo@...ux.intel.com>, <gg@...mlogic.co.uk>, <s-guiriec@...com>,
	<broonie@...nsource.wolfsonmicro.com>, <linux-usb@...r.kernel.org>,
	<linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-doc@...r.kernel.org>, <devicetree-discuss@...ts.ozlabs.org>
CC:	<grant.likely@...retlab.ca>, <gregkh@...uxfoundation.org>,
	<kishon@...com>
Subject: [PATCH v1 8/8] usb: otg: palmas-usb: fix cold plug issue

if the cable is connected even before the palmas-usb is loaded, the
cable connect detection event will be missed. It's fixed here by checking
for VBUS line states when palmas-usb is loaded.

Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
---
 drivers/usb/otg/palmas-usb.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/usb/otg/palmas-usb.c b/drivers/usb/otg/palmas-usb.c
index 07629cd..d62f673 100644
--- a/drivers/usb/otg/palmas-usb.c
+++ b/drivers/usb/otg/palmas-usb.c
@@ -187,6 +187,11 @@ static int palmas_enable_irq(struct palmas_usb *palmas_usb)
 	palmas_usb_write(palmas_usb->palmas, PALMAS_USB_ID_INT_EN_HI_SET,
 			PALMAS_USB_ID_INT_EN_HI_SET_ID_GND);
 
+	palmas_vbus_wakeup_irq(palmas_usb->irq4, palmas_usb);
+
+	if (palmas_usb->linkstat == OMAP_DWC3_UNKNOWN)
+		palmas_id_wakeup_irq(palmas_usb->irq2, palmas_usb);
+
 	return 0;
 }
 
-- 
1.7.9.5

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