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xHCI: set USB2 hardware LPM

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If the device pass the USB2 software LPM and the host supports hardware
LPM, enable hardware LPM for the device to let the host decide when to
put the link into lower power state.

If hardware LPM is enabled for a port and driver wants to put it into
suspend, it must first disable hardware LPM, resume the port into U0,
and then suspend the port.

Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Andiry Xu
2011-09-23 14:19:52 -07:00
committed by Greg Kroah-Hartman
parent 9574323c39
commit 65580b4321
9 changed files with 120 additions and 1 deletions
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include/linux/usb/hcd.h
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@@ -343,6 +343,7 @@ struct hc_driver {
* address is set
*/
int (*update_device)(struct usb_hcd *, struct usb_device *);
int (*set_usb2_hw_lpm)(struct usb_hcd *, struct usb_device *, int);
};
extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb);