Hi all, If I understand correctly, the importance of adding a device to the device model is that now you can register the suspend and resume power management callbacks. And the process of adding is automatically by the kernel calling the probe function. Q: if I am writing a driver for an external device, I think it cannot be automatically detected by the kernel (let's say the device is wired to the platform via a uart or mmc bus), so how can I add it to the device model ? manually ? Thank you all very much naziir -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ