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usb: gadget: udc-core: add utility for bus reset

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The udc driver can notify the udc core that bus reset occurs by
calling this utility, the core will notify gadget driver this
information and update gadget state accordingly.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Peter Chen
2014-09-12 09:32:41 +08:00
committed by Felipe Balbi
parent 1f7c516600
commit 974a70bdec
2 changed files with 23 additions and 0 deletions
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17
drivers/usb/gadget/udc/udc-core.c
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@@ -123,6 +123,23 @@ EXPORT_SYMBOL_GPL(usb_gadget_set_state);
/* ------------------------------------------------------------------------- */
/**
* usb_gadget_udc_reset - notifies the udc core that bus reset occurs
* @gadget: The gadget which bus reset occurs
* @driver: The gadget driver we want to notify
*
* If the udc driver has bus reset handler, it needs to call this when the bus
* reset occurs, it notifies the gadget driver that the bus reset occurs as
* well as updates gadget state.
*/
void usb_gadget_udc_reset(struct usb_gadget *gadget,
struct usb_gadget_driver *driver)
{
driver->reset(gadget);
usb_gadget_set_state(gadget, USB_STATE_DEFAULT);
}
EXPORT_SYMBOL_GPL(usb_gadget_udc_reset);
/**
* usb_gadget_udc_start - tells usb device controller to start up
* @gadget: The gadget we want to get started