diff options
| author | Mathias Nyman <mathias.nyman@linux.intel.com> | 2013-05-23 17:14:31 +0300 |
|---|---|---|
| committer | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2013-06-05 16:48:40 -0700 |
| commit | 17f34867e98d2fb0c03918faab79efb989fa134b (patch) | |
| tree | 1ea3f266473f6d6aa7fec9a646e04158941d0a06 /include | |
| parent | a558ccdcc71c7770c5e80c926a31cfe8a3892a09 (diff) | |
usb: add usb2 Link PM variables to sysfs and usb_device
Adds abitilty to tune L1 timeout (inactivity timer for usb2 link sleep)
and BESL (best effort service latency)via sysfs.
This also adds a new usb2_lpm_parameters structure with those variables to
struct usb_device.
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/usb.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/usb.h b/include/linux/usb.h index fe444989668..a232b7ece1f 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. @@ -488,6 +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() @@ -568,6 +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; |