Merge tag 'backport/v3.14.24-ltsi-rc1/phy-rcar-gen2-usb-to-v3.15' into backport/v3...

[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / usb / core / hub.h

diff --git a/drivers/usb/core/hub.h b/drivers/usb/core/hub.h
index 4e4790d..baf5b48 100644 (file)
--- a/drivers/usb/core/hub.h
+++ b/drivers/usb/core/hub.h
@@ -78,7 +78,7 @@ struct usb_hub {
 
 /**
  * struct usb port - kernel's representation of a usb port
- * @child: usb device attatched to the port
+ * @child: usb device attached to the port
  * @dev: generic device interface
  * @port_owner: port's owner
  * @connect_type: port's connect type
@@ -111,6 +111,16 @@ 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)
 {