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@xxxxxxx>
Signed-off-by: Wesley Cheng <wcheng@xxxxxxxxxxxxxx>
---
drivers/usb/gadget/configfs.c | 24 +++++++++++++++++++++++-
1 file changed, 23 insertions(+), 1 deletion(-)
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,
--
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