linux-kernel - [RFC/PATCH 2/5] usb: otg: twl4030: add support for notifier

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Date:	Fri, 11 Dec 2009 13:31:23 +0200
From:	Felipe Balbi <felipe.balbi@...ia.com>
To:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	Anton Vorontsov <avorontsov@...mvista.com>,
	Grazvydas Ignotas <notasas@...il.com>,
	Madhusudhan Chikkature <madhu.cr@...com>,
	linux-omap@...r.kernel.org, Greg Kroah-Hartman <gregkh@...e.de>,
	David Brownell <dbrownell@...rs.sourceforge.net>,
	Felipe Balbi <felipe.balbi@...ia.com>
Subject: [RFC/PATCH 2/5] usb: otg: twl4030: add support for notifier

it's expected that the transceiver driver will
initialize and call the notifier chain when
necessary. Implement that for twl4030-usb driver.

Signed-off-by: Felipe Balbi <felipe.balbi@...ia.com>
---
 drivers/usb/otg/twl4030-usb.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/otg/twl4030-usb.c b/drivers/usb/otg/twl4030-usb.c
index 2ffc8eb..c3e498a 100644
--- a/drivers/usb/otg/twl4030-usb.c
+++ b/drivers/usb/otg/twl4030-usb.c
@@ -36,7 +36,7 @@
 #include <linux/i2c/twl4030.h>
 #include <linux/regulator/consumer.h>
 #include <linux/err.h>
-
+#include <linux/notifier.h>
 
 /* Register defines */
 
@@ -628,7 +628,8 @@ static irqreturn_t twl4030_usb_irq(int irq, void *_twl)
 		else
 			twl4030_phy_resume(twl);
 
-		twl4030charger_usb_en(status == USB_LINK_VBUS);
+		blocking_notifier_call_chain(&twl->otg.notifier, status,
+				twl->otg.gadget);
 	}
 	sysfs_notify(&twl->dev->kobj, NULL, "vbus");
 
@@ -718,6 +719,8 @@ static int __devinit twl4030_usb_probe(struct platform_device *pdev)
 	if (device_create_file(&pdev->dev, &dev_attr_vbus))
 		dev_warn(&pdev->dev, "could not create sysfs file\n");
 
+	BLOCKING_INIT_NOTIFIER_HEAD(&twl->otg.notifier);
+
 	/* Our job is to use irqs and status from the power module
 	 * to keep the transceiver disabled when nothing's connected.
 	 *
-- 
1.6.6.rc0

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