From: Peter Chen Date: Fri, 9 Dec 2011 06:17:24 +0000 (+0800) Subject: ENGR00169885-2 usb-udc: Add Doc for udc X-Git-Tag: v3.0.35-fsl~1777 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=552e92b8eb12b7e360dcbb9b30d2c478c59930c4;p=karo-tx-linux.git ENGR00169885-2 usb-udc: Add Doc for udc Add remote wakeup test method to udc doc Signed-off-by: Peter Chen --- diff --git a/Documentation/arm/imx/udc.txt b/Documentation/arm/imx/udc.txt new file mode 100644 index 000000000000..fdbaa848983b --- /dev/null +++ b/Documentation/arm/imx/udc.txt @@ -0,0 +1,16 @@ +How to test remote wakeup (Make sure connecting to usb host and gadget is loaded) +1. Prepare a usb host which featured with remote wakeup +alternatively, You can use another i.mx board (like mx50 rdp, or mx6q) +2. Boot up both boards, and connect two boards with usb cable +3. At device side, do below commands: +- modprobe g_file_storage file=/dev/mmcblk0p1 (other gadgets are also ok) +- echo 1 > /sys/devices/platform/fsl-usb2-udc/gadget/remote_wakeup +4. At host side, do below command: +- echo enabled > /sys/devices/platform/fsl-ehci.1/power/wakeup +- echo standby > /sys/power/state +5. Send Remote wakeup to wake up host +At device side, do below command: +echo 1 > /sys/devices/platform/fsl-usb2-udc/gadget/start_remote_wakeup +6. The expected behaviour is: host is waked up, and there is +not re-enumeration happens. +