diff options
Diffstat (limited to 'include/linux/usb')
| -rw-r--r-- | include/linux/usb/ch9.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/usb/ch9.h b/include/linux/usb/ch9.h index 86c50907634e..abdd310c77f0 100644 --- a/include/linux/usb/ch9.h +++ b/include/linux/usb/ch9.h @@ -72,6 +72,17 @@ extern const char *usb_speed_string(enum usb_device_speed speed); extern enum usb_device_speed usb_get_maximum_speed(struct device *dev); /** + * usb_get_maximum_ssp_rate - Get the signaling rate generation and lane count + * of a SuperSpeed Plus capable device. + * @dev: Pointer to the given USB controller device + * + * If the string from "maximum-speed" property is super-speed-plus-genXxY where + * 'X' is the generation number and 'Y' is the number of lanes, then this + * function returns the corresponding enum usb_ssp_rate. + */ +extern enum usb_ssp_rate usb_get_maximum_ssp_rate(struct device *dev); + +/** * usb_state_string - Returns human readable name for the state. * @state: The state to return a human-readable name for. If it's not * any of the states devices in usb_device_state_string enum, |