usb: xhci: add USB2 Link power management BESL support
usb 2.0 devices with link power managment (LPM) can describe their idle link
timeouts either in BESL or HIRD format, so far xHCI has only supported HIRD but
later xHCI errata add BESL support as well
BESL timeouts need to inform exit latency changes with an evaluate
context command the same way USB 3.0 link PM code does.
The same xhci_change_max_exit_latency() function is used as with USB3
but code is pulled out from #ifdef CONFIG_PM as USB2.0 BESL LPM
funcionality does not depend on CONFIG_PM.
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
diff --git a/include/linux/usb.h b/include/linux/usb.h
index b424e53..fe44498 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -468,6 +468,7 @@
* @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
@@ -538,6 +539,7 @@
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;