diff options
| author | Wesley Cheng <wcheng@codeaurora.org> | 2020-12-29 15:03:31 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-01-07 14:34:22 +0100 |
| commit | 4d7aae9f7a18f27ade0fc1d275f272f23529d6ba (patch) | |
| tree | fb518d3234c229d7e41c3c3a9eb9efd3ec9b80dd /drivers/usb/gadget | |
| parent | ed054e4e95d6cb0582f1283707ddb40f18d14bfb (diff) | |
| download | linux-4d7aae9f7a18f27ade0fc1d275f272f23529d6ba.tar.bz2 | |
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: 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>
Diffstat (limited to 'drivers/usb/gadget')
| -rw-r--r-- | drivers/usb/gadget/configfs.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c index 56051bb97349..80ca7ff2fb97 100644 --- a/drivers/usb/gadget/configfs.c +++ b/drivers/usb/gadget/configfs.c @@ -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, |