On Wed, 10 May 2006, rakesh kn wrote:
> Hi ,
>
> I have written the platform glue for ARC - EHCI controller. I provided
> the suspend/resume call backs in struct platform_driver with CONFIG_PM
> and CONFIG_USB_SUSPEND for selecti ve suspend/resume enabled.
>
> My kernel is compile to be monolithic. So once the kernel boots up,
> the driver is registered.
>
> I mounted on sysfs and when i try to suspend the host controller with
> a camera (mass storage) pluggged in to it.
>
> I have provided some debug prints in the suspend/resume call backs i
> provided in the struct platform_driver.
>
> I execute the command to suspend using /sys/bus/usb/devices/usb1/powe/state
>
> ehco -n 3 > /sys/bus/usb/devices/usb1/powe/state,
> Shouldn't the corresponding suspend call back get invoked. For me it is not.
> Similarly for resume.
>
> Please tell me where i am wrong.
First problem: You have misspelled the file name. It should be:
/sys/bus/usb/devices/usb1/power/state
with an 'r' at the end of "power".
Second problem: You cannot suspend the host controller without first
suspending all the devices and interfaces beneath it in the device tree.
Alan Stern
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