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| author | Peter Chen <peter.chen@freescale.com> | 2015-02-11 05:44:50 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-18 16:19:09 +0100 |
| commit | 01e3ad863fc0f15b802c8a5247e1c252bd04f429 (patch) | |
| tree | 8221394e1808840495053cd81492d3ca1c6804cc /Documentation/usb | |
| parent | usb: chipidea: imx: add usb as system wakeup source (diff) | |
| download | linux-01e3ad863fc0f15b802c8a5247e1c252bd04f429.tar.xz linux-01e3ad863fc0f15b802c8a5247e1c252bd04f429.zip | |
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>
Diffstat (limited to 'Documentation/usb')
| -rw-r--r-- | Documentation/usb/chipidea.txt | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/Documentation/usb/chipidea.txt b/Documentation/usb/chipidea.txt index 995c8bca40e2..3f848c1f2940 100644 --- a/Documentation/usb/chipidea.txt +++ b/Documentation/usb/chipidea.txt @@ -69,3 +69,24 @@ cat /sys/kernel/debug/ci_hdrc.0/registers ---------------------- "On-The-Go and Embedded Host Supplement to the USB Revision 2.0 Specification July 27, 2012 Revision 2.0 version 1.1a" + +2. How to enable USB as system wakeup source +----------------------------------- +Below is the example for how to enable USB as system wakeup source +at imx6 platform. + +2.1 Enable core's wakeup +echo enabled > /sys/bus/platform/devices/ci_hdrc.0/power/wakeup +2.2 Enable glue layer's wakeup +echo enabled > /sys/bus/platform/devices/2184000.usb/power/wakeup +2.3 Enable PHY's wakeup (optional) +echo enabled > /sys/bus/platform/devices/20c9000.usbphy/power/wakeup +2.4 Enable roothub's wakeup +echo enabled > /sys/bus/usb/devices/usb1/power/wakeup +2.5 Enable related device's wakeup +echo enabled > /sys/bus/usb/devices/1-1/power/wakeup + +If the system has only one usb port, and you want usb wakeup at this port, you +can use below script to enable usb wakeup. +for i in $(find /sys -name wakeup | grep usb);do echo enabled > $i;done; + |