tisci_msg_lpm_set_device_constraint_req Struct Reference

Detailed Description

Request for TISCI_MSG_LPM_SET_DEVICE_CONSTRAINT.

Parameters

hdr	TISCI header to provide ACK/NAK flags to the host.
id	Device ID of device on which constraint has to be set/cleared.
state	The desired state of constraint: set or clear.
rsvd_0	Reserved for future use.
rsvd_1	Reserved for future use.

This message is used by host to set constraint on a device. This can be sent anytime after boot before prepare sleep message and after current low power mode is exited. Any device can set a constraint on the low power mode that the SoC can enter. It allows configurable information to be easily shared from the application, as this is a non-secure message and therefore can be sent by anyone. By setting a constraint, the device ensures that it will not be powered off or reset in the selected mode.

Notes:

• Access Restriction: Exclusivity flag of Device will be honored for setting constraint. If some other host has exclusive rights on this device, NAK will be returned.
• Clearing of constraints can be done irrespective of exclusivity.

Data Fields
struct tisci_header	hdr
uint32_t	id
uint8_t	state
uint32_t	rsvd_0
uint32_t	rsvd_1

Field Documentation

hdr

struct tisci_header tisci_msg_lpm_set_device_constraint_req::hdr

id

uint32_t tisci_msg_lpm_set_device_constraint_req::id

state

uint8_t tisci_msg_lpm_set_device_constraint_req::state

rsvd_0

uint32_t tisci_msg_lpm_set_device_constraint_req::rsvd_0

rsvd_1

uint32_t tisci_msg_lpm_set_device_constraint_req::rsvd_1