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

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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: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
Link: https://lore.kernel.org/r/1609283011-21997-4-git-send-email-wcheng@codeaurora.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wesley Cheng 2020-12-29 15:03:31 -08:00 committed by Greg Kroah-Hartman
parent ed054e4e95
commit 4d7aae9f7a
1 changed files with 23 additions and 1 deletions
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24
drivers/usb/gadget/configfs.c
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@ -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,