lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

USB: EHCI: EHCI 1.1 addendum: Basic LPM feature support

Browse Source 
With this patch, the LPM capable EHCI host controller can put device
into L1 sleep state which is a mode that can enter/exit quickly, and
reduce power consumption.

Signed-off-by: Jacob Pan <jacob.jun.pan@intel.com>
Signed-off-by: Alek Du <alek.du@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alek Du
2010-06-04 15:47:55 +08:00
committed by Greg Kroah-Hartman
parent aa4d834298
commit 48f2497014
7 changed files with 134 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/usb/host/ehci-hub.c
View File

@@ -790,6 +790,11 @@ static int ehci_hub_control (
status_reg);
break;
case USB_PORT_FEAT_C_CONNECTION:
if (ehci->has_lpm) {
/* clear PORTSC bits on disconnect */
temp &= ~PORT_LPM;
temp &= ~PORT_DEV_ADDR;
}
ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC,
status_reg);
break;