portx_power_control has three options. "auto", "on" and "off" "auto" - if port without device, power off the port. "on" - port must be power on. "off" - port must be power off portx_power_state can be used to determine ports's power state. [RFC PATCH 1/3] xhci: Add clear PORT_POWER feature process in the [RFC PATCH 2/3] USB/ACPI: Add usb port's acpi power control in the [RFC PATCH 3/3] usb : Add sysfs files to control usb port's power git diff --stat drivers/usb/core/hub.c | 38 ++++++++++ drivers/usb/core/sysfs.c | 167 ++++++++++++++++++++++++++++++++++++++++++- drivers/usb/core/usb-acpi.c | 28 +++++++ drivers/usb/core/usb.c | 2 + drivers/usb/core/usb.h | 6 ++ drivers/usb/host/xhci-hub.c | 15 ++++ include/linux/usb.h | 22 ++++++ 7 files changed, 275 insertions(+), 3 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html