On Wed, 7 Mar 2007, Pandita, Vikram wrote:
> I have a related query on USB suspend:
> In Host mode, is there a way to force a SUSPEND/RESUME from the class driver
> or application?
You can force a suspend from within the kernel. Suppose that udev is a
struct usb_device you want to suspend. Then you can call:
(udev->dev.bus->suspend)(&udev->dev);
You can force a suspend from an application if your kernel has
CONFIG_PM_SYSFS_DEPRECATED turned on. From the shell you can do:
echo -n 2 >/sys/bus/usb/devices/.../power/state
where "..." is the name of the device to suspend. A similar approach will
work from within a program.
Alan Stern
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