Date: June 2015
Contact: Kevin Strasser <kevin.strasser@linux.intel.com>
Description:
- If CONFIG_PM_RUNTIME is set and a USB 3.0 lpm-capable device is
- plugged in to a xHCI host which supports link PM, it will check
- if U1 and U2 exit latencies have been set in the BOS
- descriptor; if the check is is passed and the host supports
- USB3 hardware LPM, USB3 hardware LPM will be enabled for the
- device and the USB device directory will contain a file named
+ If CONFIG_PM is set and a USB 3.0 lpm-capable device is plugged
+ in to a xHCI host which supports link PM, it will check if U1
+ and U2 exit latencies have been set in the BOS descriptor; if
+ the check is is passed and the host supports USB3 hardware LPM,
+ USB3 hardware LPM will be enabled for the device and the USB
+ device directory will contain a file named
power/usb3_hardware_lpm. The file holds a string value (enable
or disable) indicating whether or not USB3 hardware LPM is
enabled for the device.