465 lines
16 KiB
C
465 lines
16 KiB
C
|
// SPDX-License-Identifier: BSD-3-Clause
|
||
|
|
/*
|
||
|
|
* Texas Instruments System Control Interface (TISCI) Protocol
|
||
|
|
*
|
||
|
|
* Communication protocol with TI SCI hardware
|
||
|
|
* The system works in a message response protocol
|
||
|
|
* See: http://processors.wiki.ti.com/index.php/TISCI for details
|
||
|
|
*
|
||
|
|
* Copyright (C) 2015-2016 Texas Instruments Incorporated - http://www.ti.com/
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __TI_SCI_H
|
||
|
|
#define __TI_SCI_H
|
||
|
|
|
||
|
|
/* Generic Messages */
|
||
|
|
#define TI_SCI_MSG_ENABLE_WDT 0x0000
|
||
|
|
#define TI_SCI_MSG_WAKE_RESET 0x0001
|
||
|
|
#define TI_SCI_MSG_VERSION 0x0002
|
||
|
|
#define TI_SCI_MSG_WAKE_REASON 0x0003
|
||
|
|
#define TI_SCI_MSG_GOODBYE 0x0004
|
||
|
|
#define TI_SCI_MSG_SYS_RESET 0x0005
|
||
|
|
|
||
|
|
/* Device requests */
|
||
|
|
#define TI_SCI_MSG_SET_DEVICE_STATE 0x0200
|
||
|
|
#define TI_SCI_MSG_GET_DEVICE_STATE 0x0201
|
||
|
|
#define TI_SCI_MSG_SET_DEVICE_RESETS 0x0202
|
||
|
|
|
||
|
|
/* Clock requests */
|
||
|
|
#define TI_SCI_MSG_SET_CLOCK_STATE 0x0100
|
||
|
|
#define TI_SCI_MSG_GET_CLOCK_STATE 0x0101
|
||
|
|
#define TI_SCI_MSG_SET_CLOCK_PARENT 0x0102
|
||
|
|
#define TI_SCI_MSG_GET_CLOCK_PARENT 0x0103
|
||
|
|
#define TI_SCI_MSG_GET_NUM_CLOCK_PARENTS 0x0104
|
||
|
|
#define TI_SCI_MSG_SET_CLOCK_FREQ 0x010c
|
||
|
|
#define TI_SCI_MSG_QUERY_CLOCK_FREQ 0x010d
|
||
|
|
#define TI_SCI_MSG_GET_CLOCK_FREQ 0x010e
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_msg_hdr - Generic Message Header for All messages and responses
|
||
|
|
* @type: Type of messages: One of TI_SCI_MSG* values
|
||
|
|
* @host: Host of the message
|
||
|
|
* @seq: Message identifier indicating a transfer sequence
|
||
|
|
* @flags: Flag for the message
|
||
|
|
*/
|
||
|
|
struct ti_sci_msg_hdr {
|
||
|
|
u16 type;
|
||
|
|
u8 host;
|
||
|
|
u8 seq;
|
||
|
|
#define TI_SCI_MSG_FLAG(val) (1 << (val))
|
||
|
|
#define TI_SCI_FLAG_REQ_GENERIC_NORESPONSE 0x0
|
||
|
|
#define TI_SCI_FLAG_REQ_ACK_ON_RECEIVED TI_SCI_MSG_FLAG(0)
|
||
|
|
#define TI_SCI_FLAG_REQ_ACK_ON_PROCESSED TI_SCI_MSG_FLAG(1)
|
||
|
|
#define TI_SCI_FLAG_RESP_GENERIC_NACK 0x0
|
||
|
|
#define TI_SCI_FLAG_RESP_GENERIC_ACK TI_SCI_MSG_FLAG(1)
|
||
|
|
/* Additional Flags */
|
||
|
|
u32 flags;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_msg_resp_version - Response for a message
|
||
|
|
* @hdr: Generic header
|
||
|
|
* @firmware_description: String describing the firmware
|
||
|
|
* @firmware_revision: Firmware revision
|
||
|
|
* @abi_major: Major version of the ABI that firmware supports
|
||
|
|
* @abi_minor: Minor version of the ABI that firmware supports
|
||
|
|
*
|
||
|
|
* In general, ABI version changes follow the rule that minor version increments
|
||
|
|
* are backward compatible. Major revision changes in ABI may not be
|
||
|
|
* backward compatible.
|
||
|
|
*
|
||
|
|
* Response to a generic message with message type TI_SCI_MSG_VERSION
|
||
|
|
*/
|
||
|
|
struct ti_sci_msg_resp_version {
|
||
|
|
struct ti_sci_msg_hdr hdr;
|
||
|
|
char firmware_description[32];
|
||
|
|
u16 firmware_revision;
|
||
|
|
u8 abi_major;
|
||
|
|
u8 abi_minor;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_msg_req_reboot - Reboot the SoC
|
||
|
|
* @hdr: Generic Header
|
||
|
|
*
|
||
|
|
* Request type is TI_SCI_MSG_SYS_RESET, responded with a generic
|
||
|
|
* ACK/NACK message.
|
||
|
|
*/
|
||
|
|
struct ti_sci_msg_req_reboot {
|
||
|
|
struct ti_sci_msg_hdr hdr;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_msg_req_set_device_state - Set the desired state of the device
|
||
|
|
* @hdr: Generic header
|
||
|
|
* @id: Indicates which device to modify
|
||
|
|
* @reserved: Reserved space in message, must be 0 for backward compatibility
|
||
|
|
* @state: The desired state of the device.
|
||
|
|
*
|
||
|
|
* Certain flags can also be set to alter the device state:
|
||
|
|
* + MSG_FLAG_DEVICE_WAKE_ENABLED - Configure the device to be a wake source.
|
||
|
|
* The meaning of this flag will vary slightly from device to device and from
|
||
|
|
* SoC to SoC but it generally allows the device to wake the SoC out of deep
|
||
|
|
* suspend states.
|
||
|
|
* + MSG_FLAG_DEVICE_RESET_ISO - Enable reset isolation for this device.
|
||
|
|
* + MSG_FLAG_DEVICE_EXCLUSIVE - Claim this device exclusively. When passed
|
||
|
|
* with STATE_RETENTION or STATE_ON, it will claim the device exclusively.
|
||
|
|
* If another host already has this device set to STATE_RETENTION or STATE_ON,
|
||
|
|
* the message will fail. Once successful, other hosts attempting to set
|
||
|
|
* STATE_RETENTION or STATE_ON will fail.
|
||
|
|
*
|
||
|
|
* Request type is TI_SCI_MSG_SET_DEVICE_STATE, responded with a generic
|
||
|
|
* ACK/NACK message.
|
||
|
|
*/
|
||
|
|
struct ti_sci_msg_req_set_device_state {
|
||
|
|
/* Additional hdr->flags options */
|
||
|
|
#define MSG_FLAG_DEVICE_WAKE_ENABLED TI_SCI_MSG_FLAG(8)
|
||
|
|
#define MSG_FLAG_DEVICE_RESET_ISO TI_SCI_MSG_FLAG(9)
|
||
|
|
#define MSG_FLAG_DEVICE_EXCLUSIVE TI_SCI_MSG_FLAG(10)
|
||
|
|
struct ti_sci_msg_hdr hdr;
|
||
|
|
u32 id;
|
||
|
|
u32 reserved;
|
||
|
|
|
||
|
|
#define MSG_DEVICE_SW_STATE_AUTO_OFF 0
|
||
|
|
#define MSG_DEVICE_SW_STATE_RETENTION 1
|
||
|
|
#define MSG_DEVICE_SW_STATE_ON 2
|
||
|
|
u8 state;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_msg_req_get_device_state - Request to get device.
|
||
|
|
* @hdr: Generic header
|
||
|
|
* @id: Device Identifier
|
||
|
|
*
|
||
|
|
* Request type is TI_SCI_MSG_GET_DEVICE_STATE, responded device state
|
||
|
|
* information
|
||
|
|
*/
|
||
|
|
struct ti_sci_msg_req_get_device_state {
|
||
|
|
struct ti_sci_msg_hdr hdr;
|
||
|
|
u32 id;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_msg_resp_get_device_state - Response to get device request.
|
||
|
|
* @hdr: Generic header
|
||
|
|
* @context_loss_count: Indicates how many times the device has lost context. A
|
||
|
|
* driver can use this monotonic counter to determine if the device has
|
||
|
|
* lost context since the last time this message was exchanged.
|
||
|
|
* @resets: Programmed state of the reset lines.
|
||
|
|
* @programmed_state: The state as programmed by set_device.
|
||
|
|
* - Uses the MSG_DEVICE_SW_* macros
|
||
|
|
* @current_state: The actual state of the hardware.
|
||
|
|
*
|
||
|
|
* Response to request TI_SCI_MSG_GET_DEVICE_STATE.
|
||
|
|
*/
|
||
|
|
struct ti_sci_msg_resp_get_device_state {
|
||
|
|
struct ti_sci_msg_hdr hdr;
|
||
|
|
u32 context_loss_count;
|
||
|
|
u32 resets;
|
||
|
|
u8 programmed_state;
|
||
|
|
#define MSG_DEVICE_HW_STATE_OFF 0
|
||
|
|
#define MSG_DEVICE_HW_STATE_ON 1
|
||
|
|
#define MSG_DEVICE_HW_STATE_TRANS 2
|
||
|
|
u8 current_state;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_msg_req_set_device_resets - Set the desired resets
|
||
|
|
* configuration of the device
|
||
|
|
* @hdr: Generic header
|
||
|
|
* @id: Indicates which device to modify
|
||
|
|
* @resets: A bit field of resets for the device. The meaning, behavior,
|
||
|
|
* and usage of the reset flags are device specific. 0 for a bit
|
||
|
|
* indicates releasing the reset represented by that bit while 1
|
||
|
|
* indicates keeping it held.
|
||
|
|
*
|
||
|
|
* Request type is TI_SCI_MSG_SET_DEVICE_RESETS, responded with a generic
|
||
|
|
* ACK/NACK message.
|
||
|
|
*/
|
||
|
|
struct ti_sci_msg_req_set_device_resets {
|
||
|
|
struct ti_sci_msg_hdr hdr;
|
||
|
|
u32 id;
|
||
|
|
u32 resets;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_msg_req_set_clock_state - Request to setup a Clock state
|
||
|
|
* @hdr: Generic Header, Certain flags can be set specific to the clocks:
|
||
|
|
* MSG_FLAG_CLOCK_ALLOW_SSC: Allow this clock to be modified
|
||
|
|
* via spread spectrum clocking.
|
||
|
|
* MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE: Allow this clock's
|
||
|
|
* frequency to be changed while it is running so long as it
|
||
|
|
* is within the min/max limits.
|
||
|
|
* MSG_FLAG_CLOCK_INPUT_TERM: Enable input termination, this
|
||
|
|
* is only applicable to clock inputs on the SoC pseudo-device.
|
||
|
|
* @dev_id: Device identifier this request is for
|
||
|
|
* @clk_id: Clock identifier for the device for this request.
|
||
|
|
* Each device has it's own set of clock inputs. This indexes
|
||
|
|
* which clock input to modify.
|
||
|
|
* @request_state: Request the state for the clock to be set to.
|
||
|
|
* MSG_CLOCK_SW_STATE_UNREQ: The IP does not require this clock,
|
||
|
|
* it can be disabled, regardless of the state of the device
|
||
|
|
* MSG_CLOCK_SW_STATE_AUTO: Allow the System Controller to
|
||
|
|
* automatically manage the state of this clock. If the device
|
||
|
|
* is enabled, then the clock is enabled. If the device is set
|
||
|
|
* to off or retention, then the clock is internally set as not
|
||
|
|
* being required by the device.(default)
|
||
|
|
* MSG_CLOCK_SW_STATE_REQ: Configure the clock to be enabled,
|
||
|
|
* regardless of the state of the device.
|
||
|
|
*
|
||
|
|
* Normally, all required clocks are managed by TISCI entity, this is used
|
||
|
|
* only for specific control *IF* required. Auto managed state is
|
||
|
|
* MSG_CLOCK_SW_STATE_AUTO, in other states, TISCI entity assume remote
|
||
|
|
* will explicitly control.
|
||
|
|
*
|
||
|
|
* Request type is TI_SCI_MSG_SET_CLOCK_STATE, response is a generic
|
||
|
|
* ACK or NACK message.
|
||
|
|
*/
|
||
|
|
struct ti_sci_msg_req_set_clock_state {
|
||
|
|
/* Additional hdr->flags options */
|
||
|
|
#define MSG_FLAG_CLOCK_ALLOW_SSC TI_SCI_MSG_FLAG(8)
|
||
|
|
#define MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE TI_SCI_MSG_FLAG(9)
|
||
|
|
#define MSG_FLAG_CLOCK_INPUT_TERM TI_SCI_MSG_FLAG(10)
|
||
|
|
struct ti_sci_msg_hdr hdr;
|
||
|
|
u32 dev_id;
|
||
|
|
u8 clk_id;
|
||
|
|
#define MSG_CLOCK_SW_STATE_UNREQ 0
|
||
|
|
#define MSG_CLOCK_SW_STATE_AUTO 1
|
||
|
|
#define MSG_CLOCK_SW_STATE_REQ 2
|
||
|
|
u8 request_state;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_msg_req_get_clock_state - Request for clock state
|
||
|
|
* @hdr: Generic Header
|
||
|
|
* @dev_id: Device identifier this request is for
|
||
|
|
* @clk_id: Clock identifier for the device for this request.
|
||
|
|
* Each device has it's own set of clock inputs. This indexes
|
||
|
|
* which clock input to get state of.
|
||
|
|
*
|
||
|
|
* Request type is TI_SCI_MSG_GET_CLOCK_STATE, response is state
|
||
|
|
* of the clock
|
||
|
|
*/
|
||
|
|
struct ti_sci_msg_req_get_clock_state {
|
||
|
|
struct ti_sci_msg_hdr hdr;
|
||
|
|
u32 dev_id;
|
||
|
|
u8 clk_id;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_msg_resp_get_clock_state - Response to get clock state
|
||
|
|
* @hdr: Generic Header
|
||
|
|
* @programmed_state: Any programmed state of the clock. This is one of
|
||
|
|
* MSG_CLOCK_SW_STATE* values.
|
||
|
|
* @current_state: Current state of the clock. This is one of:
|
||
|
|
* MSG_CLOCK_HW_STATE_NOT_READY: Clock is not ready
|
||
|
|
* MSG_CLOCK_HW_STATE_READY: Clock is ready
|
||
|
|
*
|
||
|
|
* Response to TI_SCI_MSG_GET_CLOCK_STATE.
|
||
|
|
*/
|
||
|
|
struct ti_sci_msg_resp_get_clock_state {
|
||
|
|
struct ti_sci_msg_hdr hdr;
|
||
|
|
u8 programmed_state;
|
||
|
|
#define MSG_CLOCK_HW_STATE_NOT_READY 0
|
||
|
|
#define MSG_CLOCK_HW_STATE_READY 1
|
||
|
|
u8 current_state;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_msg_req_set_clock_parent - Set the clock parent
|
||
|
|
* @hdr: Generic Header
|
||
|
|
* @dev_id: Device identifier this request is for
|
||
|
|
* @clk_id: Clock identifier for the device for this request.
|
||
|
|
* Each device has it's own set of clock inputs. This indexes
|
||
|
|
* which clock input to modify.
|
||
|
|
* @parent_id: The new clock parent is selectable by an index via this
|
||
|
|
* parameter.
|
||
|
|
*
|
||
|
|
* Request type is TI_SCI_MSG_SET_CLOCK_PARENT, response is generic
|
||
|
|
* ACK / NACK message.
|
||
|
|
*/
|
||
|
|
struct ti_sci_msg_req_set_clock_parent {
|
||
|
|
struct ti_sci_msg_hdr hdr;
|
||
|
|
u32 dev_id;
|
||
|
|
u8 clk_id;
|
||
|
|
u8 parent_id;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_msg_req_get_clock_parent - Get the clock parent
|
||
|
|
* @hdr: Generic Header
|
||
|
|
* @dev_id: Device identifier this request is for
|
||
|
|
* @clk_id: Clock identifier for the device for this request.
|
||
|
|
* Each device has it's own set of clock inputs. This indexes
|
||
|
|
* which clock input to get the parent for.
|
||
|
|
*
|
||
|
|
* Request type is TI_SCI_MSG_GET_CLOCK_PARENT, response is parent information
|
||
|
|
*/
|
||
|
|
struct ti_sci_msg_req_get_clock_parent {
|
||
|
|
struct ti_sci_msg_hdr hdr;
|
||
|
|
u32 dev_id;
|
||
|
|
u8 clk_id;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_msg_resp_get_clock_parent - Response with clock parent
|
||
|
|
* @hdr: Generic Header
|
||
|
|
* @parent_id: The current clock parent
|
||
|
|
*
|
||
|
|
* Response to TI_SCI_MSG_GET_CLOCK_PARENT.
|
||
|
|
*/
|
||
|
|
struct ti_sci_msg_resp_get_clock_parent {
|
||
|
|
struct ti_sci_msg_hdr hdr;
|
||
|
|
u8 parent_id;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_msg_req_get_clock_num_parents - Request to get clock parents
|
||
|
|
* @hdr: Generic header
|
||
|
|
* @dev_id: Device identifier this request is for
|
||
|
|
* @clk_id: Clock identifier for the device for this request.
|
||
|
|
*
|
||
|
|
* This request provides information about how many clock parent options
|
||
|
|
* are available for a given clock to a device. This is typically used
|
||
|
|
* for input clocks.
|
||
|
|
*
|
||
|
|
* Request type is TI_SCI_MSG_GET_NUM_CLOCK_PARENTS, response is appropriate
|
||
|
|
* message, or NACK in case of inability to satisfy request.
|
||
|
|
*/
|
||
|
|
struct ti_sci_msg_req_get_clock_num_parents {
|
||
|
|
struct ti_sci_msg_hdr hdr;
|
||
|
|
u32 dev_id;
|
||
|
|
u8 clk_id;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_msg_resp_get_clock_num_parents - Response for get clk parents
|
||
|
|
* @hdr: Generic header
|
||
|
|
* @num_parents: Number of clock parents
|
||
|
|
*
|
||
|
|
* Response to TI_SCI_MSG_GET_NUM_CLOCK_PARENTS
|
||
|
|
*/
|
||
|
|
struct ti_sci_msg_resp_get_clock_num_parents {
|
||
|
|
struct ti_sci_msg_hdr hdr;
|
||
|
|
u8 num_parents;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_msg_req_query_clock_freq - Request to query a frequency
|
||
|
|
* @hdr: Generic Header
|
||
|
|
* @dev_id: Device identifier this request is for
|
||
|
|
* @min_freq_hz: The minimum allowable frequency in Hz. This is the minimum
|
||
|
|
* allowable programmed frequency and does not account for clock
|
||
|
|
* tolerances and jitter.
|
||
|
|
* @target_freq_hz: The target clock frequency. A frequency will be found
|
||
|
|
* as close to this target frequency as possible.
|
||
|
|
* @max_freq_hz: The maximum allowable frequency in Hz. This is the maximum
|
||
|
|
* allowable programmed frequency and does not account for clock
|
||
|
|
* tolerances and jitter.
|
||
|
|
* @clk_id: Clock identifier for the device for this request.
|
||
|
|
*
|
||
|
|
* NOTE: Normally clock frequency management is automatically done by TISCI
|
||
|
|
* entity. In case of specific requests, TISCI evaluates capability to achieve
|
||
|
|
* requested frequency within provided range and responds with
|
||
|
|
* result message.
|
||
|
|
*
|
||
|
|
* Request type is TI_SCI_MSG_QUERY_CLOCK_FREQ, response is appropriate message,
|
||
|
|
* or NACK in case of inability to satisfy request.
|
||
|
|
*/
|
||
|
|
struct ti_sci_msg_req_query_clock_freq {
|
||
|
|
struct ti_sci_msg_hdr hdr;
|
||
|
|
u32 dev_id;
|
||
|
|
u64 min_freq_hz;
|
||
|
|
u64 target_freq_hz;
|
||
|
|
u64 max_freq_hz;
|
||
|
|
u8 clk_id;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_msg_resp_query_clock_freq - Response to a clock frequency query
|
||
|
|
* @hdr: Generic Header
|
||
|
|
* @freq_hz: Frequency that is the best match in Hz.
|
||
|
|
*
|
||
|
|
* Response to request type TI_SCI_MSG_QUERY_CLOCK_FREQ. NOTE: if the request
|
||
|
|
* cannot be satisfied, the message will be of type NACK.
|
||
|
|
*/
|
||
|
|
struct ti_sci_msg_resp_query_clock_freq {
|
||
|
|
struct ti_sci_msg_hdr hdr;
|
||
|
|
u64 freq_hz;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_msg_req_set_clock_freq - Request to setup a clock frequency
|
||
|
|
* @hdr: Generic Header
|
||
|
|
* @dev_id: Device identifier this request is for
|
||
|
|
* @min_freq_hz: The minimum allowable frequency in Hz. This is the minimum
|
||
|
|
* allowable programmed frequency and does not account for clock
|
||
|
|
* tolerances and jitter.
|
||
|
|
* @target_freq_hz: The target clock frequency. The clock will be programmed
|
||
|
|
* at a rate as close to this target frequency as possible.
|
||
|
|
* @max_freq_hz: The maximum allowable frequency in Hz. This is the maximum
|
||
|
|
* allowable programmed frequency and does not account for clock
|
||
|
|
* tolerances and jitter.
|
||
|
|
* @clk_id: Clock identifier for the device for this request.
|
||
|
|
*
|
||
|
|
* NOTE: Normally clock frequency management is automatically done by TISCI
|
||
|
|
* entity. In case of specific requests, TISCI evaluates capability to achieve
|
||
|
|
* requested range and responds with success/failure message.
|
||
|
|
*
|
||
|
|
* This sets the desired frequency for a clock within an allowable
|
||
|
|
* range. This message will fail on an enabled clock unless
|
||
|
|
* MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE is set for the clock. Additionally,
|
||
|
|
* if other clocks have their frequency modified due to this message,
|
||
|
|
* they also must have the MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE or be disabled.
|
||
|
|
*
|
||
|
|
* Calling set frequency on a clock input to the SoC pseudo-device will
|
||
|
|
* inform the PMMC of that clock's frequency. Setting a frequency of
|
||
|
|
* zero will indicate the clock is disabled.
|
||
|
|
*
|
||
|
|
* Calling set frequency on clock outputs from the SoC pseudo-device will
|
||
|
|
* function similarly to setting the clock frequency on a device.
|
||
|
|
*
|
||
|
|
* Request type is TI_SCI_MSG_SET_CLOCK_FREQ, response is a generic ACK/NACK
|
||
|
|
* message.
|
||
|
|
*/
|
||
|
|
struct ti_sci_msg_req_set_clock_freq {
|
||
|
|
struct ti_sci_msg_hdr hdr;
|
||
|
|
u32 dev_id;
|
||
|
|
u64 min_freq_hz;
|
||
|
|
u64 target_freq_hz;
|
||
|
|
u64 max_freq_hz;
|
||
|
|
u8 clk_id;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_msg_req_get_clock_freq - Request to get the clock frequency
|
||
|
|
* @hdr: Generic Header
|
||
|
|
* @dev_id: Device identifier this request is for
|
||
|
|
* @clk_id: Clock identifier for the device for this request.
|
||
|
|
*
|
||
|
|
* NOTE: Normally clock frequency management is automatically done by TISCI
|
||
|
|
* entity. In some cases, clock frequencies are configured by host.
|
||
|
|
*
|
||
|
|
* Request type is TI_SCI_MSG_GET_CLOCK_FREQ, responded with clock frequency
|
||
|
|
* that the clock is currently at.
|
||
|
|
*/
|
||
|
|
struct ti_sci_msg_req_get_clock_freq {
|
||
|
|
struct ti_sci_msg_hdr hdr;
|
||
|
|
u32 dev_id;
|
||
|
|
u8 clk_id;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_msg_resp_get_clock_freq - Response of clock frequency request
|
||
|
|
* @hdr: Generic Header
|
||
|
|
* @freq_hz: Frequency that the clock is currently on, in Hz.
|
||
|
|
*
|
||
|
|
* Response to request type TI_SCI_MSG_GET_CLOCK_FREQ.
|
||
|
|
*/
|
||
|
|
struct ti_sci_msg_resp_get_clock_freq {
|
||
|
|
struct ti_sci_msg_hdr hdr;
|
||
|
|
u64 freq_hz;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
#endif /* __TI_SCI_H */
|