diff options
| author | Mathias Nyman <mathias.nyman@linux.intel.com> | 2015-03-06 17:23:19 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-06 09:47:48 -0800 |
| commit | b8cb91e058cd0c0f02059c1207293c5b31d350fa (patch) | |
| tree | 4eac133da2e31268645eb19dcf5ea1d837449b26 /drivers/usb/host/xhci.h | |
| parent | 45ba2154d12fc43b70312198ec47085f10be801a (diff) | |
xhci: Workaround for PME stuck issues in Intel xhci
The xhci in Intel Sunrisepoint and Cherryview platforms need a driver
workaround for a Stuck PME that might either block PME events in suspend,
or create spurious PME events preventing runtime suspend.
Workaround is to clear a internal PME flag, BIT(28) in a vendor specific
PMCTRL register at offset 0x80a4, in both suspend resume callbacks
Without this, xhci connected usb devices might never be able to wake up the
system from suspend, or prevent device from going to suspend (xhci d3)
Cc: <stable@vger.kernel.org>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/xhci.h')
| -rw-r--r-- | drivers/usb/host/xhci.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index d0663931e5b..265ab1771d2 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1566,6 +1566,7 @@ struct xhci_hcd { #define XHCI_SPURIOUS_WAKEUP (1 << 18) /* For controllers with a broken beyond repair streams implementation */ #define XHCI_BROKEN_STREAMS (1 << 19) +#define XHCI_PME_STUCK_QUIRK (1 << 20) unsigned int num_active_eps; unsigned int limit_active_eps; /* There are two roothubs to keep track of bus suspend info for */ |