diff options
| -rw-r--r-- | drivers/usb/gadget/udc/core.c | 20 | ||||
| -rw-r--r-- | include/linux/usb/gadget.h | 1 |
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c index 62d52fc0fcdc..eec388bccb25 100644 --- a/drivers/usb/gadget/udc/core.c +++ b/drivers/usb/gadget/udc/core.c @@ -1056,6 +1056,23 @@ static inline void usb_gadget_udc_stop(struct usb_udc *udc) } /** + * usb_gadget_udc_set_speed - tells usb device controller speed supported by + * current driver + * @udc: The device we want to set maximum speed + * @speed: The maximum speed to allowed to run + * + * This call is issued by the UDC Class driver before calling + * usb_gadget_udc_start() in order to make sure that we don't try to + * connect on speeds the gadget driver doesn't support. + */ +static inline void usb_gadget_udc_set_speed(struct usb_udc *udc, + enum usb_device_speed speed) +{ + if (udc->gadget->ops->udc_set_speed) + udc->gadget->ops->udc_set_speed(udc->gadget, speed); +} + +/** * usb_udc_release - release the usb_udc struct * @dev: the dev member within usb_udc * @@ -1288,6 +1305,9 @@ static int udc_bind_to_driver(struct usb_udc *udc, struct usb_gadget_driver *dri udc->dev.driver = &driver->driver; udc->gadget->dev.driver = &driver->driver; + if (driver->max_speed < udc->gadget->max_speed) + usb_gadget_udc_set_speed(udc, driver->max_speed); + ret = driver->bind(udc->gadget, driver); if (ret) goto err1; diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index 3ee5f2a7c0b4..1a4a4bacfae6 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -304,6 +304,7 @@ struct usb_gadget_ops { int (*udc_start)(struct usb_gadget *, struct usb_gadget_driver *); int (*udc_stop)(struct usb_gadget *); + void (*udc_set_speed)(struct usb_gadget *, enum usb_device_speed); struct usb_ep *(*match_ep)(struct usb_gadget *, struct usb_endpoint_descriptor *, struct usb_ss_ep_comp_descriptor *); |