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authorMathias Nyman <mathias.nyman@linux.intel.com>2013-05-23 17:14:30 +0300
committerSarah Sharp <sarah.a.sharp@linux.intel.com>2013-06-05 16:48:24 -0700
commita558ccdcc71c7770c5e80c926a31cfe8a3892a09 (patch)
treedca37d89cd14666c3f107463817f4309ba1f2b68 /include/linux/usb.h
parentb6e76371c888f5cb677f190a28444ac8875359ad (diff)
downloadop-kernel-dev-a558ccdcc71c7770c5e80c926a31cfe8a3892a09.zip
op-kernel-dev-a558ccdcc71c7770c5e80c926a31cfe8a3892a09.tar.gz
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>
Diffstat (limited to 'include/linux/usb.h')
-rw-r--r--include/linux/usb.h2
1 files changed, 2 insertions, 0 deletions
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 @@ 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
@@ -538,6 +539,7 @@ 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;
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