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USB: gpio_vbus: add delayed vbus_session calls

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Call usb_gadget_vbus_connect() and ...disconnect() from a
workqueue rather than from an irq handler, allowing msleep()
calls in vbus_session.  Update kerneldoc to match.

[ dbrownell@users.sourceforge.net: more kerneldoc updates ]

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Robert Jarzmik
2009-01-24 23:54:31 -08:00
committed by Greg Kroah-Hartman
parent dd44be6b17
commit c2344f13b5
3 changed files with 39 additions and 13 deletions
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6
include/linux/usb/gadget.h
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@@ -598,6 +598,7 @@ static inline int usb_gadget_clear_selfpowered(struct usb_gadget *gadget)
/**
* usb_gadget_vbus_connect - Notify controller that VBUS is powered
* @gadget:The device which now has VBUS power.
* Context: can sleep
*
* This call is used by a driver for an external transceiver (or GPIO)
* that detects a VBUS power session starting. Common responses include
@@ -636,6 +637,7 @@ static inline int usb_gadget_vbus_draw(struct usb_gadget *gadget, unsigned mA)
/**
* usb_gadget_vbus_disconnect - notify controller about VBUS session end
* @gadget:the device whose VBUS supply is being described
* Context: can sleep
*
* This call is used by a driver for an external transceiver (or GPIO)
* that detects a VBUS power session ending. Common responses include
@@ -792,19 +794,20 @@ struct usb_gadget_driver {
/**
* usb_gadget_register_driver - register a gadget driver
* @driver:the driver being registered
* Context: can sleep
*
* Call this in your gadget driver's module initialization function,
* to tell the underlying usb controller driver about your driver.
* The driver's bind() function will be called to bind it to a
* gadget before this registration call returns. It's expected that
* the bind() functions will be in init sections.
* This function must be called in a context that can sleep.
*/
int usb_gadget_register_driver(struct usb_gadget_driver *driver);
/**
* usb_gadget_unregister_driver - unregister a gadget driver
* @driver:the driver being unregistered
* Context: can sleep
*
* Call this in your gadget driver's module cleanup function,
* to tell the underlying usb controller that your driver is
@@ -813,7 +816,6 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver);
* to unbind() and clean up any device state, before this procedure
* finally returns. It's expected that the unbind() functions
* will in in exit sections, so may not be linked in some kernels.
* This function must be called in a context that can sleep.
*/
int usb_gadget_unregister_driver(struct usb_gadget_driver *driver);