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authorDavid Brownell <david-b@pacbell.net>2006-08-04 11:31:55 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2006-09-27 11:58:48 -0700
commitd413984ae936fad46678403b38d79c595e5aaafe (patch)
treef494a450d7289d941e3ca2b2e33bfacc29cac024 /drivers/usb/host/ohci-pxa27x.c
parent06afff00bcab0e384afbef70194fd3469532abdf (diff)
USB: OHCI avoids root hub timer polling
This teaches OHCI to use the root hub status change (RHSC) IRQ, bypassing root hub timers most of the time and switching over to the "new" root hub polling scheme. It's complicated by the fact that implementations of OHCI trigger and ack that IRQ differently (the spec is vague there). Avoiding root hub timers helps mechanisms like "dynamic tick" leave the CPU in lowpower modes for longer intervals. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/ohci-pxa27x.c')
-rw-r--r--drivers/usb/host/ohci-pxa27x.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/host/ohci-pxa27x.c b/drivers/usb/host/ohci-pxa27x.c
index 6f559e102789..2752d36c2a78 100644
--- a/drivers/usb/host/ohci-pxa27x.c
+++ b/drivers/usb/host/ohci-pxa27x.c
@@ -288,6 +288,7 @@ static const struct hc_driver ohci_pxa27x_hc_driver = {
*/
.hub_status_data = ohci_hub_status_data,
.hub_control = ohci_hub_control,
+ .hub_irq_enable = ohci_rhsc_enable,
#ifdef CONFIG_PM
.bus_suspend = ohci_bus_suspend,
.bus_resume = ohci_bus_resume,