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Diffstat (limited to 'drivers/usb/core/hub.h')
| -rw-r--r-- | drivers/usb/core/hub.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/usb/core/hub.h b/drivers/usb/core/hub.h index f9b521e60128..4bd72dd303d5 100644 --- a/drivers/usb/core/hub.h +++ b/drivers/usb/core/hub.h @@ -112,6 +112,16 @@ extern int hub_port_debounce(struct usb_hub *hub, int port1, extern int usb_clear_port_feature(struct usb_device *hdev, int port1, int feature); +static inline bool hub_is_port_power_switchable(struct usb_hub *hub) +{ + __le16 hcs; + + if (!hub) + return false; + hcs = hub->descriptor->wHubCharacteristics; + return (le16_to_cpu(hcs) & HUB_CHAR_LPSM) < HUB_CHAR_NO_LPSM; +} + static inline int hub_port_debounce_be_connected(struct usb_hub *hub, int port1) { |