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doc: usb: chipidea: add usb wakeup enable example
Add the example for how to enable USB as system wakeup source.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
authored by
Peter Chen
and committed by
Greg Kroah-Hartman
01e3ad86
6d653110
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Documentation/usb/chipidea.txt
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Documentation/usb/chipidea.txt
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"On-The-Go and Embedded Host Supplement to the USB Revision 2.0 Specification
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July 27, 2012 Revision 2.0 version 1.1a"
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2. How to enable USB as system wakeup source
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-----------------------------------
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Below is the example for how to enable USB as system wakeup source
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at imx6 platform.
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2.1 Enable core's wakeup
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echo enabled > /sys/bus/platform/devices/ci_hdrc.0/power/wakeup
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2.2 Enable glue layer's wakeup
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echo enabled > /sys/bus/platform/devices/2184000.usb/power/wakeup
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2.3 Enable PHY's wakeup (optional)
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echo enabled > /sys/bus/platform/devices/20c9000.usbphy/power/wakeup
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2.4 Enable roothub's wakeup
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echo enabled > /sys/bus/usb/devices/usb1/power/wakeup
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2.5 Enable related device's wakeup
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echo enabled > /sys/bus/usb/devices/1-1/power/wakeup
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If the system has only one usb port, and you want usb wakeup at this port, you
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can use below script to enable usb wakeup.
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for i in $(find /sys -name wakeup | grep usb);do echo enabled > $i;done;
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