Method and controller for configuring device power state control

A method and a controller (32) for power state control of a device (30) that is connected to two or more other devices (40) are described. Also described are a method and a controller (32) for configuring the power state control. Power states of related devices among the two or more other devices (40) are monitored (10). In case all related devices among the two or more other devices (40) are in a low power mode, the device (30) is switched (12) to a low power mode. Alternatively, in case all related devices among the two or more other devices (40) are in a low power mode, the device (30) is switched (15) to a normal power mode. Which of the other devices (40) are related devices is determined in a configuration procedure.