Commit 4d7aae9f authored by Wesley Cheng's avatar Wesley Cheng Committed by Greg Kroah-Hartman
Browse files

usb: gadget: configfs: Add a specific configFS reset callback 



In order for configFS based USB gadgets to set the proper charge current
for bus reset scenarios, expose a separate reset callback to set the
current to 100mA based on the USB battery charging specification.

Reviewed-by: default avatarPeter Chen <peter.chen@nxp.com>
Signed-off-by: default avatarWesley Cheng <wcheng@codeaurora.org>
Link: https://lore.kernel.org/r/1609283011-21997-4-git-send-email-wcheng@codeaurora.org


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ed054e4e

drivers/usb/gadget/configfs.c

+23 −1
Original line number Diff line number Diff line
@@ -1481,6 +1481,28 @@ static void configfs_composite_disconnect(struct usb_gadget *gadget) 
	spin_unlock_irqrestore(&gi->spinlock, flags);

}



static void configfs_composite_reset(struct usb_gadget *gadget)

{

	struct usb_composite_dev *cdev;

	struct gadget_info *gi;

	unsigned long flags;



	cdev = get_gadget_data(gadget);

	if (!cdev)

		return;



	gi = container_of(cdev, struct gadget_info, cdev);

	spin_lock_irqsave(&gi->spinlock, flags);

	cdev = get_gadget_data(gadget);

	if (!cdev || gi->unbind) {

		spin_unlock_irqrestore(&gi->spinlock, flags);

		return;

	}



	composite_reset(gadget);

	spin_unlock_irqrestore(&gi->spinlock, flags);

}



static void configfs_composite_suspend(struct usb_gadget *gadget)

{

	struct usb_composite_dev *cdev;
@@ -1530,7 +1552,7 @@ static const struct usb_gadget_driver configfs_driver_template = { 
	.unbind         = configfs_composite_unbind,



	.setup          = configfs_composite_setup,

	.reset          = configfs_composite_disconnect,

	.reset          = configfs_composite_reset,

	.disconnect     = configfs_composite_disconnect,



	.suspend	= configfs_composite_suspend,