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authorAlek Du <alek.du@intel.com>2010-06-04 15:47:56 +0800
committerGreg Kroah-Hartman <gregkh@suse.de>2010-08-10 14:35:35 -0700
commit5a9cdf332eae724b11906cb1712e3a662eba32b2 (patch)
tree67aad1a4e795b2b26e4e320305accba16c4d201e /drivers/usb/host/ehci.h
parent48f24970144479c29b8cee6d2e1dbedf6dcf9cfb (diff)
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USB: EHCI: EHCI 1.1 addendum: Enable Per-port change detect bits
This patch will enable Per-port event feature defined in EHCI 1.1 addendum. This feature addresses an issue where HCD is currently required to read and parse PORTSC for all enabled root hub ports. With this patch, the overhead will be reduced. Signed-off-by: Alek Du <alek.du@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/ehci.h')
-rw-r--r--drivers/usb/host/ehci.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index 21f30a0c3d2..e6c57cc416f 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -141,6 +141,7 @@ struct ehci_hcd { /* one per controller */
__hc32 *ohci_hcctrl_reg;
unsigned has_hostpc:1;
unsigned has_lpm:1; /* support link power management */
+ unsigned has_ppcd:1; /* support per-port change bits */
u8 sbrn; /* packed release number */
/* irq statistics */