1 files changed, 21 insertions, 0 deletions

diff --git a/include/linux/usb.h b/include/linux/usb.h
index a0bee5a28d1a..a232b7ece1f6 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -394,6 +394,22 @@ enum usb_port_connect_type {
 };
 
 /*
+ * USB 2.0 Link Power Management (LPM) parameters.
+ */
+struct usb2_lpm_parameters {
+        /* Best effort service latency indicate how long the host will drive
+         * resume on an exit from L1.
+         */
+        unsigned int besl;
+
+        /* Timeout value in microseconds for the L1 inactivity (LPM) timer.
+         * When the timer counts to zero, the parent hub will initiate a LPM
+         * transition to L1.
+         */
+        int timeout;
+};
+
+/*
  * USB 3.0 Link Power Management (LPM) parameters.
  *
  * PEL and SEL are USB 3.0 Link PM latencies for device-initiated LPM exit.
@@ -468,6 +484,7 @@ struct usb3_lpm_parameters {
  * @wusb: device is Wireless USB
  * @lpm_capable: device supports LPM
  * @usb2_hw_lpm_capable: device can perform USB2 hardware LPM
+ * @usb2_hw_lpm_besl_capable: device can perform USB2 hardware BESL LPM
  * @usb2_hw_lpm_enabled: USB2 hardware LPM enabled
  * @usb3_lpm_enabled: USB3 hardware LPM enabled
  * @string_langid: language ID for strings
@@ -487,6 +504,7 @@ struct usb3_lpm_parameters {
  *      specific data for the device.
  * @slot_id: Slot ID assigned by xHCI
  * @removable: Device can be physically removed from this port
+ * @l1_params: best effor service latency for USB2 L1 LPM state, and L1 timeout.
  * @u1_params: exit latencies for USB3 U1 LPM state, and hub-initiated timeout.
  * @u2_params: exit latencies for USB3 U2 LPM state, and hub-initiated timeout.
  * @lpm_disable_count: Ref count used by usb_disable_lpm() and usb_enable_lpm()
@@ -538,6 +556,7 @@ struct usb_device {
         unsigned wusb:1;
         unsigned lpm_capable:1;
         unsigned usb2_hw_lpm_capable:1;
+        unsigned usb2_hw_lpm_besl_capable:1;
         unsigned usb2_hw_lpm_enabled:1;
         unsigned usb3_lpm_enabled:1;
         int string_langid;
@@ -566,6 +585,7 @@ struct usb_device {
         struct wusb_dev *wusb_dev;
         int slot_id;
         enum usb_device_removable removable;
+        struct usb2_lpm_parameters l1_params;
         struct usb3_lpm_parameters u1_params;
         struct usb3_lpm_parameters u2_params;
         unsigned lpm_disable_count;
@@ -717,6 +737,7 @@ const struct usb_device_id *usb_match_id(struct usb_interface *interface,
 extern int usb_match_one_id(struct usb_interface *interface,
                             const struct usb_device_id *id);
 
+extern int usb_for_each_dev(void *data, int (*fn)(struct usb_device *, void *));
 extern struct usb_interface *usb_find_interface(struct usb_driver *drv,
                 int minor);
 extern struct usb_interface *usb_ifnum_to_if(const struct usb_device *dev,