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authorPeter Chen <peter.chen@freescale.com>2015-02-11 12:44:50 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-03-18 16:19:09 +0100
commit01e3ad863fc0f15b802c8a5247e1c252bd04f429 (patch)
tree8221394e1808840495053cd81492d3ca1c6804cc /Documentation/usb
parent6d6531104d20692190690ed73eaaac770c42aa49 (diff)
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.txt21
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;
+