On Fri, Jul 06, 2012 at 02:14:00PM +0800, Lan Tianyu wrote: > Change since v5: Add usb_autopm_get/put_interface() around the port > power operations in the control attribute's callback to deal with > situation that control attribute is changed when the usb hub is suspended. > > Change since v4: Add clear PORT_POWER if power policy is "off" in the > hub_power_on(). Return -EIO if set/clear PORT_POWER fails in the > store_port_power_control() > > This patch is to add two attributes for each usb hub ports to control port's > power. > Control port's power through setting or clearing PORT_POWER feature. > > control has two options. "auto", "on" and "off" > "on" - port power must be on. > "off" - port power must be off. > > state reports usb port's power state > "on" - power on > "off" - power off > "error" - can't get power state > > Acked-by: Alan Stern <st...@rowland.harvard.edu> > Signed-off-by: Lan Tianyu <tianyu....@intel.com> > --- > Documentation/ABI/testing/sysfs-bus-usb | 25 ++++++ > drivers/usb/core/hub.c | 133 > ++++++++++++++++++++++++++++++- > 2 files changed, 157 insertions(+), 1 deletions(-) > > diff --git a/Documentation/ABI/testing/sysfs-bus-usb > b/Documentation/ABI/testing/sysfs-bus-usb > index 6df4e6f..abe4ea4 100644 > --- a/Documentation/ABI/testing/sysfs-bus-usb > +++ b/Documentation/ABI/testing/sysfs-bus-usb > @@ -208,3 +208,28 @@ Description: > such as ACPI. This file will read either "removable" or > "fixed" if the information is available, and "unknown" > otherwise. > + > +What: /sys/bus/usb/devices/.../(hub interface)/portX/control > +Date: June 2012
It is no longer June 2012 :) -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
