From 3c5ec7129b01562f60f48056bed173948c721938 Mon Sep 17 00:00:00 2001 From: Peter Chen Date: Fri, 9 Dec 2011 14:17:24 +0800 Subject: ENGR00169885-2 usb-udc: Add Doc for udc Add remote wakeup test method to udc doc Signed-off-by: Peter Chen --- Documentation/arm/imx/udc.txt | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 Documentation/arm/imx/udc.txt (limited to 'Documentation') 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. + -- cgit v1.2.3