Controlling transitions of devices between normal state and quiescent state
AssigneeArm Limited
InventorsDominic William BROWN, Christopher Vincent SEVERINO, Ashley John CRAWFORD
Life of this patent
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Abstract
A data processing apparatus has a number of devices having a normal state and a quiescent state in which the device is ready for being placed in a power saving state. Each device provides at least one preference indication indicative of a preference to operate in the normal state or the quiescent state. A controller controls a common state transition process for transitioning each of the devices between the normal state and the quiescent state based on the preference indication received from each device.
Claims20
A data processing apparatus comprising:
- a plurality of devices;
- and
- a controller configured to control transitions of the plurality of devices between a normal state and a quiescent state in which the device is ready for being placed in a power saving state;
- wherein each device is configured to provide at least one preference indication indicative of a preference to operate in the normal state or the quiescent state;
- and
- the controller is configured to control a common state transition process for transitioning each of said plurality of devices between the normal state and the quiescent state, in dependence on the at least one preference indication received from each of the plurality of devices.
A controller comprising:
- control circuitry configured to control transitions of a plurality of devices between a normal state and a quiescent state in which the device is ready for being placed in a power saving state;
- and
- an interface configured to receive, from each of the plurality of devices, at least one preference indication indicative of a preference to operate in the normal state or the quiescent state;
- wherein the control circuitry is configured to control a common state transition process for transitioning each of said plurality of devices between the normal state and the quiescent state, in dependence on the at least one preference indication received from each of the plurality of devices.
(canceled)
(canceled)
A method for controlling a plurality of devices having a normal state and a quiescent state in which the device is ready for being placed in a power saving state;
- the method comprising:
- receiving from each of the plurality of devices at least one preference indication indicative of a preference to operate in the normal state or the quiescent state;
- and
- controlling a common state transition process for transitioning each of said plurality of devices between the normal state and the quiescent state, in dependence on the at least one preference indication received from each of the plurality of devices.
Dependencies are inferred from the claim text.