834 lines
27 KiB
C
834 lines
27 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* SCMI Message Protocol driver header
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*
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* Copyright (C) 2018-2021 ARM Ltd.
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*/
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#ifndef _LINUX_SCMI_PROTOCOL_H
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#define _LINUX_SCMI_PROTOCOL_H
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#include <linux/bitfield.h>
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#include <linux/device.h>
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#include <linux/notifier.h>
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#include <linux/types.h>
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#define SCMI_MAX_STR_SIZE 64
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#define SCMI_SHORT_NAME_MAX_SIZE 16
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#define SCMI_MAX_NUM_RATES 16
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/**
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* struct scmi_revision_info - version information structure
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*
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* @major_ver: Major ABI version. Change here implies risk of backward
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* compatibility break.
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* @minor_ver: Minor ABI version. Change here implies new feature addition,
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* or compatible change in ABI.
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* @num_protocols: Number of protocols that are implemented, excluding the
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* base protocol.
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* @num_agents: Number of agents in the system.
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* @impl_ver: A vendor-specific implementation version.
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* @vendor_id: A vendor identifier(Null terminated ASCII string)
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* @sub_vendor_id: A sub-vendor identifier(Null terminated ASCII string)
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*/
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struct scmi_revision_info {
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u16 major_ver;
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u16 minor_ver;
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u8 num_protocols;
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u8 num_agents;
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u32 impl_ver;
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char vendor_id[SCMI_SHORT_NAME_MAX_SIZE];
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char sub_vendor_id[SCMI_SHORT_NAME_MAX_SIZE];
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};
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struct scmi_clock_info {
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char name[SCMI_MAX_STR_SIZE];
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unsigned int enable_latency;
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bool rate_discrete;
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bool rate_changed_notifications;
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bool rate_change_requested_notifications;
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union {
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struct {
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int num_rates;
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u64 rates[SCMI_MAX_NUM_RATES];
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} list;
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struct {
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u64 min_rate;
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u64 max_rate;
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u64 step_size;
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} range;
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};
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};
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struct scmi_handle;
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struct scmi_device;
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struct scmi_protocol_handle;
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/**
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* struct scmi_clk_proto_ops - represents the various operations provided
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* by SCMI Clock Protocol
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*
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* @count_get: get the count of clocks provided by SCMI
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* @info_get: get the information of the specified clock
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* @rate_get: request the current clock rate of a clock
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* @rate_set: set the clock rate of a clock
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* @enable: enables the specified clock
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* @disable: disables the specified clock
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*/
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struct scmi_clk_proto_ops {
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int (*count_get)(const struct scmi_protocol_handle *ph);
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const struct scmi_clock_info *(*info_get)
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(const struct scmi_protocol_handle *ph, u32 clk_id);
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int (*rate_get)(const struct scmi_protocol_handle *ph, u32 clk_id,
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u64 *rate);
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int (*rate_set)(const struct scmi_protocol_handle *ph, u32 clk_id,
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u64 rate);
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int (*enable)(const struct scmi_protocol_handle *ph, u32 clk_id);
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int (*disable)(const struct scmi_protocol_handle *ph, u32 clk_id);
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int (*enable_atomic)(const struct scmi_protocol_handle *ph, u32 clk_id);
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int (*disable_atomic)(const struct scmi_protocol_handle *ph,
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u32 clk_id);
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};
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/**
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* struct scmi_perf_proto_ops - represents the various operations provided
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* by SCMI Performance Protocol
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*
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* @limits_set: sets limits on the performance level of a domain
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* @limits_get: gets limits on the performance level of a domain
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* @level_set: sets the performance level of a domain
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* @level_get: gets the performance level of a domain
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* @device_domain_id: gets the scmi domain id for a given device
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* @transition_latency_get: gets the DVFS transition latency for a given device
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* @device_opps_add: adds all the OPPs for a given device
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* @freq_set: sets the frequency for a given device using sustained frequency
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* to sustained performance level mapping
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* @freq_get: gets the frequency for a given device using sustained frequency
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* to sustained performance level mapping
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* @est_power_get: gets the estimated power cost for a given performance domain
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* at a given frequency
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* @fast_switch_possible: indicates if fast DVFS switching is possible or not
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* for a given device
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* @power_scale_mw_get: indicates if the power values provided are in milliWatts
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* or in some other (abstract) scale
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*/
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struct scmi_perf_proto_ops {
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int (*limits_set)(const struct scmi_protocol_handle *ph, u32 domain,
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u32 max_perf, u32 min_perf);
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int (*limits_get)(const struct scmi_protocol_handle *ph, u32 domain,
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u32 *max_perf, u32 *min_perf);
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int (*level_set)(const struct scmi_protocol_handle *ph, u32 domain,
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u32 level, bool poll);
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int (*level_get)(const struct scmi_protocol_handle *ph, u32 domain,
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u32 *level, bool poll);
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int (*device_domain_id)(struct device *dev);
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int (*transition_latency_get)(const struct scmi_protocol_handle *ph,
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struct device *dev);
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int (*device_opps_add)(const struct scmi_protocol_handle *ph,
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struct device *dev);
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int (*freq_set)(const struct scmi_protocol_handle *ph, u32 domain,
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unsigned long rate, bool poll);
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int (*freq_get)(const struct scmi_protocol_handle *ph, u32 domain,
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unsigned long *rate, bool poll);
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int (*est_power_get)(const struct scmi_protocol_handle *ph, u32 domain,
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unsigned long *rate, unsigned long *power);
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bool (*fast_switch_possible)(const struct scmi_protocol_handle *ph,
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struct device *dev);
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bool (*power_scale_mw_get)(const struct scmi_protocol_handle *ph);
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};
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/**
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* struct scmi_power_proto_ops - represents the various operations provided
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* by SCMI Power Protocol
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*
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* @num_domains_get: get the count of power domains provided by SCMI
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* @name_get: gets the name of a power domain
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* @state_set: sets the power state of a power domain
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* @state_get: gets the power state of a power domain
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*/
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struct scmi_power_proto_ops {
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int (*num_domains_get)(const struct scmi_protocol_handle *ph);
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const char *(*name_get)(const struct scmi_protocol_handle *ph,
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u32 domain);
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#define SCMI_POWER_STATE_TYPE_SHIFT 30
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#define SCMI_POWER_STATE_ID_MASK (BIT(28) - 1)
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#define SCMI_POWER_STATE_PARAM(type, id) \
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((((type) & BIT(0)) << SCMI_POWER_STATE_TYPE_SHIFT) | \
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((id) & SCMI_POWER_STATE_ID_MASK))
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#define SCMI_POWER_STATE_GENERIC_ON SCMI_POWER_STATE_PARAM(0, 0)
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#define SCMI_POWER_STATE_GENERIC_OFF SCMI_POWER_STATE_PARAM(1, 0)
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int (*state_set)(const struct scmi_protocol_handle *ph, u32 domain,
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u32 state);
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int (*state_get)(const struct scmi_protocol_handle *ph, u32 domain,
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u32 *state);
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};
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/**
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* struct scmi_sensor_reading - represent a timestamped read
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*
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* Used by @reading_get_timestamped method.
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*
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* @value: The signed value sensor read.
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* @timestamp: An unsigned timestamp for the sensor read, as provided by
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* SCMI platform. Set to zero when not available.
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*/
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struct scmi_sensor_reading {
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long long value;
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unsigned long long timestamp;
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};
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/**
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* struct scmi_range_attrs - specifies a sensor or axis values' range
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* @min_range: The minimum value which can be represented by the sensor/axis.
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* @max_range: The maximum value which can be represented by the sensor/axis.
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*/
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struct scmi_range_attrs {
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long long min_range;
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long long max_range;
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};
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/**
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* struct scmi_sensor_axis_info - describes one sensor axes
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* @id: The axes ID.
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* @type: Axes type. Chosen amongst one of @enum scmi_sensor_class.
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* @scale: Power-of-10 multiplier applied to the axis unit.
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* @name: NULL-terminated string representing axes name as advertised by
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* SCMI platform.
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* @extended_attrs: Flag to indicate the presence of additional extended
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* attributes for this axes.
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* @resolution: Extended attribute representing the resolution of the axes.
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* Set to 0 if not reported by this axes.
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* @exponent: Extended attribute representing the power-of-10 multiplier that
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* is applied to the resolution field. Set to 0 if not reported by
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* this axes.
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* @attrs: Extended attributes representing minimum and maximum values
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* measurable by this axes. Set to 0 if not reported by this sensor.
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*/
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struct scmi_sensor_axis_info {
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unsigned int id;
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unsigned int type;
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int scale;
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char name[SCMI_MAX_STR_SIZE];
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bool extended_attrs;
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unsigned int resolution;
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int exponent;
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struct scmi_range_attrs attrs;
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};
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/**
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* struct scmi_sensor_intervals_info - describes number and type of available
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* update intervals
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* @segmented: Flag for segmented intervals' representation. When True there
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* will be exactly 3 intervals in @desc, with each entry
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* representing a member of a segment in this order:
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* {lowest update interval, highest update interval, step size}
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* @count: Number of intervals described in @desc.
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* @desc: Array of @count interval descriptor bitmask represented as detailed in
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* the SCMI specification: it can be accessed using the accompanying
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* macros.
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* @prealloc_pool: A minimal preallocated pool of desc entries used to avoid
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* lesser-than-64-bytes dynamic allocation for small @count
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* values.
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*/
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struct scmi_sensor_intervals_info {
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bool segmented;
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unsigned int count;
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#define SCMI_SENS_INTVL_SEGMENT_LOW 0
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#define SCMI_SENS_INTVL_SEGMENT_HIGH 1
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#define SCMI_SENS_INTVL_SEGMENT_STEP 2
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unsigned int *desc;
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#define SCMI_SENS_INTVL_GET_SECS(x) FIELD_GET(GENMASK(20, 5), (x))
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#define SCMI_SENS_INTVL_GET_EXP(x) \
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({ \
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int __signed_exp = FIELD_GET(GENMASK(4, 0), (x)); \
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\
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if (__signed_exp & BIT(4)) \
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__signed_exp |= GENMASK(31, 5); \
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__signed_exp; \
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})
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#define SCMI_MAX_PREALLOC_POOL 16
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unsigned int prealloc_pool[SCMI_MAX_PREALLOC_POOL];
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};
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/**
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* struct scmi_sensor_info - represents information related to one of the
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* available sensors.
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* @id: Sensor ID.
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* @type: Sensor type. Chosen amongst one of @enum scmi_sensor_class.
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* @scale: Power-of-10 multiplier applied to the sensor unit.
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* @num_trip_points: Number of maximum configurable trip points.
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* @async: Flag for asynchronous read support.
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* @update: Flag for continuouos update notification support.
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* @timestamped: Flag for timestamped read support.
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* @tstamp_scale: Power-of-10 multiplier applied to the sensor timestamps to
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* represent it in seconds.
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* @num_axis: Number of supported axis if any. Reported as 0 for scalar sensors.
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* @axis: Pointer to an array of @num_axis descriptors.
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* @intervals: Descriptor of available update intervals.
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* @sensor_config: A bitmask reporting the current sensor configuration as
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* detailed in the SCMI specification: it can accessed and
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* modified through the accompanying macros.
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* @name: NULL-terminated string representing sensor name as advertised by
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* SCMI platform.
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* @extended_scalar_attrs: Flag to indicate the presence of additional extended
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* attributes for this sensor.
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* @sensor_power: Extended attribute representing the average power
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* consumed by the sensor in microwatts (uW) when it is active.
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* Reported here only for scalar sensors.
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* Set to 0 if not reported by this sensor.
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* @resolution: Extended attribute representing the resolution of the sensor.
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* Reported here only for scalar sensors.
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* Set to 0 if not reported by this sensor.
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* @exponent: Extended attribute representing the power-of-10 multiplier that is
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* applied to the resolution field.
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* Reported here only for scalar sensors.
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* Set to 0 if not reported by this sensor.
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* @scalar_attrs: Extended attributes representing minimum and maximum
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* measurable values by this sensor.
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* Reported here only for scalar sensors.
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* Set to 0 if not reported by this sensor.
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*/
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struct scmi_sensor_info {
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unsigned int id;
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unsigned int type;
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int scale;
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unsigned int num_trip_points;
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bool async;
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bool update;
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bool timestamped;
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int tstamp_scale;
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unsigned int num_axis;
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struct scmi_sensor_axis_info *axis;
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struct scmi_sensor_intervals_info intervals;
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unsigned int sensor_config;
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#define SCMI_SENS_CFG_UPDATE_SECS_MASK GENMASK(31, 16)
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#define SCMI_SENS_CFG_GET_UPDATE_SECS(x) \
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FIELD_GET(SCMI_SENS_CFG_UPDATE_SECS_MASK, (x))
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#define SCMI_SENS_CFG_UPDATE_EXP_MASK GENMASK(15, 11)
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#define SCMI_SENS_CFG_GET_UPDATE_EXP(x) \
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({ \
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int __signed_exp = \
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FIELD_GET(SCMI_SENS_CFG_UPDATE_EXP_MASK, (x)); \
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\
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if (__signed_exp & BIT(4)) \
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__signed_exp |= GENMASK(31, 5); \
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__signed_exp; \
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})
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#define SCMI_SENS_CFG_ROUND_MASK GENMASK(10, 9)
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#define SCMI_SENS_CFG_ROUND_AUTO 2
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#define SCMI_SENS_CFG_ROUND_UP 1
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#define SCMI_SENS_CFG_ROUND_DOWN 0
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#define SCMI_SENS_CFG_TSTAMP_ENABLED_MASK BIT(1)
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#define SCMI_SENS_CFG_TSTAMP_ENABLE 1
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#define SCMI_SENS_CFG_TSTAMP_DISABLE 0
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#define SCMI_SENS_CFG_IS_TSTAMP_ENABLED(x) \
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FIELD_GET(SCMI_SENS_CFG_TSTAMP_ENABLED_MASK, (x))
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#define SCMI_SENS_CFG_SENSOR_ENABLED_MASK BIT(0)
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#define SCMI_SENS_CFG_SENSOR_ENABLE 1
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#define SCMI_SENS_CFG_SENSOR_DISABLE 0
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char name[SCMI_MAX_STR_SIZE];
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#define SCMI_SENS_CFG_IS_ENABLED(x) FIELD_GET(BIT(0), (x))
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bool extended_scalar_attrs;
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unsigned int sensor_power;
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unsigned int resolution;
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int exponent;
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struct scmi_range_attrs scalar_attrs;
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};
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/*
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* Partial list from Distributed Management Task Force (DMTF) specification:
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* DSP0249 (Platform Level Data Model specification)
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*/
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enum scmi_sensor_class {
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NONE = 0x0,
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UNSPEC = 0x1,
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TEMPERATURE_C = 0x2,
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TEMPERATURE_F = 0x3,
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TEMPERATURE_K = 0x4,
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VOLTAGE = 0x5,
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CURRENT = 0x6,
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POWER = 0x7,
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ENERGY = 0x8,
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CHARGE = 0x9,
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VOLTAMPERE = 0xA,
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NITS = 0xB,
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LUMENS = 0xC,
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LUX = 0xD,
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CANDELAS = 0xE,
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KPA = 0xF,
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PSI = 0x10,
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NEWTON = 0x11,
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CFM = 0x12,
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RPM = 0x13,
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HERTZ = 0x14,
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SECS = 0x15,
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MINS = 0x16,
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HOURS = 0x17,
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DAYS = 0x18,
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WEEKS = 0x19,
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MILS = 0x1A,
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INCHES = 0x1B,
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FEET = 0x1C,
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CUBIC_INCHES = 0x1D,
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CUBIC_FEET = 0x1E,
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METERS = 0x1F,
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CUBIC_CM = 0x20,
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CUBIC_METERS = 0x21,
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LITERS = 0x22,
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FLUID_OUNCES = 0x23,
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RADIANS = 0x24,
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STERADIANS = 0x25,
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REVOLUTIONS = 0x26,
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CYCLES = 0x27,
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GRAVITIES = 0x28,
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OUNCES = 0x29,
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POUNDS = 0x2A,
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FOOT_POUNDS = 0x2B,
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OUNCE_INCHES = 0x2C,
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GAUSS = 0x2D,
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GILBERTS = 0x2E,
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HENRIES = 0x2F,
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FARADS = 0x30,
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OHMS = 0x31,
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SIEMENS = 0x32,
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MOLES = 0x33,
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BECQUERELS = 0x34,
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PPM = 0x35,
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DECIBELS = 0x36,
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DBA = 0x37,
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DBC = 0x38,
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GRAYS = 0x39,
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SIEVERTS = 0x3A,
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COLOR_TEMP_K = 0x3B,
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BITS = 0x3C,
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BYTES = 0x3D,
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WORDS = 0x3E,
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DWORDS = 0x3F,
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QWORDS = 0x40,
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PERCENTAGE = 0x41,
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PASCALS = 0x42,
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COUNTS = 0x43,
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GRAMS = 0x44,
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NEWTON_METERS = 0x45,
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HITS = 0x46,
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MISSES = 0x47,
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RETRIES = 0x48,
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OVERRUNS = 0x49,
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UNDERRUNS = 0x4A,
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COLLISIONS = 0x4B,
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PACKETS = 0x4C,
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MESSAGES = 0x4D,
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CHARS = 0x4E,
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ERRORS = 0x4F,
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CORRECTED_ERRS = 0x50,
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UNCORRECTABLE_ERRS = 0x51,
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SQ_MILS = 0x52,
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SQ_INCHES = 0x53,
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SQ_FEET = 0x54,
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SQ_CM = 0x55,
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SQ_METERS = 0x56,
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RADIANS_SEC = 0x57,
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BPM = 0x58,
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METERS_SEC_SQUARED = 0x59,
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METERS_SEC = 0x5A,
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CUBIC_METERS_SEC = 0x5B,
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MM_MERCURY = 0x5C,
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RADIANS_SEC_SQUARED = 0x5D,
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OEM_UNIT = 0xFF
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};
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/**
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* struct scmi_sensor_proto_ops - represents the various operations provided
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* by SCMI Sensor Protocol
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*
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* @count_get: get the count of sensors provided by SCMI
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* @info_get: get the information of the specified sensor
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* @trip_point_config: selects and configures a trip-point of interest
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* @reading_get: gets the current value of the sensor
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* @reading_get_timestamped: gets the current value and timestamp, when
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* available, of the sensor. (as of v3.0 spec)
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* Supports multi-axis sensors for sensors which
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* supports it and if the @reading array size of
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* @count entry equals the sensor num_axis
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* @config_get: Get sensor current configuration
|
|
* @config_set: Set sensor current configuration
|
|
*/
|
|
struct scmi_sensor_proto_ops {
|
|
int (*count_get)(const struct scmi_protocol_handle *ph);
|
|
const struct scmi_sensor_info *(*info_get)
|
|
(const struct scmi_protocol_handle *ph, u32 sensor_id);
|
|
int (*trip_point_config)(const struct scmi_protocol_handle *ph,
|
|
u32 sensor_id, u8 trip_id, u64 trip_value);
|
|
int (*reading_get)(const struct scmi_protocol_handle *ph, u32 sensor_id,
|
|
u64 *value);
|
|
int (*reading_get_timestamped)(const struct scmi_protocol_handle *ph,
|
|
u32 sensor_id, u8 count,
|
|
struct scmi_sensor_reading *readings);
|
|
int (*config_get)(const struct scmi_protocol_handle *ph,
|
|
u32 sensor_id, u32 *sensor_config);
|
|
int (*config_set)(const struct scmi_protocol_handle *ph,
|
|
u32 sensor_id, u32 sensor_config);
|
|
};
|
|
|
|
/**
|
|
* struct scmi_reset_proto_ops - represents the various operations provided
|
|
* by SCMI Reset Protocol
|
|
*
|
|
* @num_domains_get: get the count of reset domains provided by SCMI
|
|
* @name_get: gets the name of a reset domain
|
|
* @latency_get: gets the reset latency for the specified reset domain
|
|
* @reset: resets the specified reset domain
|
|
* @assert: explicitly assert reset signal of the specified reset domain
|
|
* @deassert: explicitly deassert reset signal of the specified reset domain
|
|
*/
|
|
struct scmi_reset_proto_ops {
|
|
int (*num_domains_get)(const struct scmi_protocol_handle *ph);
|
|
const char *(*name_get)(const struct scmi_protocol_handle *ph,
|
|
u32 domain);
|
|
int (*latency_get)(const struct scmi_protocol_handle *ph, u32 domain);
|
|
int (*reset)(const struct scmi_protocol_handle *ph, u32 domain);
|
|
int (*assert)(const struct scmi_protocol_handle *ph, u32 domain);
|
|
int (*deassert)(const struct scmi_protocol_handle *ph, u32 domain);
|
|
};
|
|
|
|
enum scmi_voltage_level_mode {
|
|
SCMI_VOLTAGE_LEVEL_SET_AUTO,
|
|
SCMI_VOLTAGE_LEVEL_SET_SYNC,
|
|
};
|
|
|
|
/**
|
|
* struct scmi_voltage_info - describe one available SCMI Voltage Domain
|
|
*
|
|
* @id: the domain ID as advertised by the platform
|
|
* @segmented: defines the layout of the entries of array @levels_uv.
|
|
* - when True the entries are to be interpreted as triplets,
|
|
* each defining a segment representing a range of equally
|
|
* space voltages: <lowest_volts>, <highest_volt>, <step_uV>
|
|
* - when False the entries simply represent a single discrete
|
|
* supported voltage level
|
|
* @negative_volts_allowed: True if any of the entries of @levels_uv represent
|
|
* a negative voltage.
|
|
* @async_level_set: True when the voltage domain supports asynchronous level
|
|
* set commands.
|
|
* @name: name assigned to the Voltage Domain by platform
|
|
* @num_levels: number of total entries in @levels_uv.
|
|
* @levels_uv: array of entries describing the available voltage levels for
|
|
* this domain.
|
|
*/
|
|
struct scmi_voltage_info {
|
|
unsigned int id;
|
|
bool segmented;
|
|
bool negative_volts_allowed;
|
|
bool async_level_set;
|
|
char name[SCMI_MAX_STR_SIZE];
|
|
unsigned int num_levels;
|
|
#define SCMI_VOLTAGE_SEGMENT_LOW 0
|
|
#define SCMI_VOLTAGE_SEGMENT_HIGH 1
|
|
#define SCMI_VOLTAGE_SEGMENT_STEP 2
|
|
int *levels_uv;
|
|
};
|
|
|
|
/**
|
|
* struct scmi_voltage_proto_ops - represents the various operations provided
|
|
* by SCMI Voltage Protocol
|
|
*
|
|
* @num_domains_get: get the count of voltage domains provided by SCMI
|
|
* @info_get: get the information of the specified domain
|
|
* @config_set: set the config for the specified domain
|
|
* @config_get: get the config of the specified domain
|
|
* @level_set: set the voltage level for the specified domain
|
|
* @level_get: get the voltage level of the specified domain
|
|
*/
|
|
struct scmi_voltage_proto_ops {
|
|
int (*num_domains_get)(const struct scmi_protocol_handle *ph);
|
|
const struct scmi_voltage_info __must_check *(*info_get)
|
|
(const struct scmi_protocol_handle *ph, u32 domain_id);
|
|
int (*config_set)(const struct scmi_protocol_handle *ph, u32 domain_id,
|
|
u32 config);
|
|
#define SCMI_VOLTAGE_ARCH_STATE_OFF 0x0
|
|
#define SCMI_VOLTAGE_ARCH_STATE_ON 0x7
|
|
int (*config_get)(const struct scmi_protocol_handle *ph, u32 domain_id,
|
|
u32 *config);
|
|
int (*level_set)(const struct scmi_protocol_handle *ph, u32 domain_id,
|
|
enum scmi_voltage_level_mode mode, s32 volt_uV);
|
|
int (*level_get)(const struct scmi_protocol_handle *ph, u32 domain_id,
|
|
s32 *volt_uV);
|
|
};
|
|
|
|
/**
|
|
* struct scmi_notify_ops - represents notifications' operations provided by
|
|
* SCMI core
|
|
* @devm_event_notifier_register: Managed registration of a notifier_block for
|
|
* the requested event
|
|
* @devm_event_notifier_unregister: Managed unregistration of a notifier_block
|
|
* for the requested event
|
|
* @event_notifier_register: Register a notifier_block for the requested event
|
|
* @event_notifier_unregister: Unregister a notifier_block for the requested
|
|
* event
|
|
*
|
|
* A user can register/unregister its own notifier_block against the wanted
|
|
* platform instance regarding the desired event identified by the
|
|
* tuple: (proto_id, evt_id, src_id) using the provided register/unregister
|
|
* interface where:
|
|
*
|
|
* @sdev: The scmi_device to use when calling the devres managed ops devm_
|
|
* @handle: The handle identifying the platform instance to use, when not
|
|
* calling the managed ops devm_
|
|
* @proto_id: The protocol ID as in SCMI Specification
|
|
* @evt_id: The message ID of the desired event as in SCMI Specification
|
|
* @src_id: A pointer to the desired source ID if different sources are
|
|
* possible for the protocol (like domain_id, sensor_id...etc)
|
|
*
|
|
* @src_id can be provided as NULL if it simply does NOT make sense for
|
|
* the protocol at hand, OR if the user is explicitly interested in
|
|
* receiving notifications from ANY existent source associated to the
|
|
* specified proto_id / evt_id.
|
|
*
|
|
* Received notifications are finally delivered to the registered users,
|
|
* invoking the callback provided with the notifier_block *nb as follows:
|
|
*
|
|
* int user_cb(nb, evt_id, report)
|
|
*
|
|
* with:
|
|
*
|
|
* @nb: The notifier block provided by the user
|
|
* @evt_id: The message ID of the delivered event
|
|
* @report: A custom struct describing the specific event delivered
|
|
*/
|
|
struct scmi_notify_ops {
|
|
int (*devm_event_notifier_register)(struct scmi_device *sdev,
|
|
u8 proto_id, u8 evt_id,
|
|
const u32 *src_id,
|
|
struct notifier_block *nb);
|
|
int (*devm_event_notifier_unregister)(struct scmi_device *sdev,
|
|
u8 proto_id, u8 evt_id,
|
|
const u32 *src_id,
|
|
struct notifier_block *nb);
|
|
int (*event_notifier_register)(const struct scmi_handle *handle,
|
|
u8 proto_id, u8 evt_id,
|
|
const u32 *src_id,
|
|
struct notifier_block *nb);
|
|
int (*event_notifier_unregister)(const struct scmi_handle *handle,
|
|
u8 proto_id, u8 evt_id,
|
|
const u32 *src_id,
|
|
struct notifier_block *nb);
|
|
};
|
|
|
|
/**
|
|
* struct scmi_handle - Handle returned to ARM SCMI clients for usage.
|
|
*
|
|
* @dev: pointer to the SCMI device
|
|
* @version: pointer to the structure containing SCMI version information
|
|
* @devm_protocol_get: devres managed method to acquire a protocol and get specific
|
|
* operations and a dedicated protocol handler
|
|
* @devm_protocol_put: devres managed method to release a protocol
|
|
* @is_transport_atomic: method to check if the underlying transport for this
|
|
* instance handle is configured to support atomic
|
|
* transactions for commands.
|
|
* Some users of the SCMI stack in the upper layers could
|
|
* be interested to know if they can assume SCMI
|
|
* command transactions associated to this handle will
|
|
* never sleep and act accordingly.
|
|
* An optional atomic threshold value could be returned
|
|
* where configured.
|
|
* @notify_ops: pointer to set of notifications related operations
|
|
*/
|
|
struct scmi_handle {
|
|
struct device *dev;
|
|
struct scmi_revision_info *version;
|
|
|
|
const void __must_check *
|
|
(*devm_protocol_get)(struct scmi_device *sdev, u8 proto,
|
|
struct scmi_protocol_handle **ph);
|
|
void (*devm_protocol_put)(struct scmi_device *sdev, u8 proto);
|
|
bool (*is_transport_atomic)(const struct scmi_handle *handle,
|
|
unsigned int *atomic_threshold);
|
|
|
|
const struct scmi_notify_ops *notify_ops;
|
|
};
|
|
|
|
enum scmi_std_protocol {
|
|
SCMI_PROTOCOL_BASE = 0x10,
|
|
SCMI_PROTOCOL_POWER = 0x11,
|
|
SCMI_PROTOCOL_SYSTEM = 0x12,
|
|
SCMI_PROTOCOL_PERF = 0x13,
|
|
SCMI_PROTOCOL_CLOCK = 0x14,
|
|
SCMI_PROTOCOL_SENSOR = 0x15,
|
|
SCMI_PROTOCOL_RESET = 0x16,
|
|
SCMI_PROTOCOL_VOLTAGE = 0x17,
|
|
};
|
|
|
|
enum scmi_system_events {
|
|
SCMI_SYSTEM_SHUTDOWN,
|
|
SCMI_SYSTEM_COLDRESET,
|
|
SCMI_SYSTEM_WARMRESET,
|
|
SCMI_SYSTEM_POWERUP,
|
|
SCMI_SYSTEM_SUSPEND,
|
|
SCMI_SYSTEM_MAX
|
|
};
|
|
|
|
struct scmi_device {
|
|
u32 id;
|
|
u8 protocol_id;
|
|
const char *name;
|
|
struct device dev;
|
|
struct scmi_handle *handle;
|
|
};
|
|
|
|
#define to_scmi_dev(d) container_of(d, struct scmi_device, dev)
|
|
|
|
struct scmi_device *
|
|
scmi_device_create(struct device_node *np, struct device *parent, int protocol,
|
|
const char *name);
|
|
void scmi_device_destroy(struct scmi_device *scmi_dev);
|
|
|
|
struct scmi_device_id {
|
|
u8 protocol_id;
|
|
const char *name;
|
|
};
|
|
|
|
struct scmi_driver {
|
|
const char *name;
|
|
int (*probe)(struct scmi_device *sdev);
|
|
void (*remove)(struct scmi_device *sdev);
|
|
const struct scmi_device_id *id_table;
|
|
|
|
struct device_driver driver;
|
|
};
|
|
|
|
#define to_scmi_driver(d) container_of(d, struct scmi_driver, driver)
|
|
|
|
#if IS_REACHABLE(CONFIG_ARM_SCMI_PROTOCOL)
|
|
int scmi_driver_register(struct scmi_driver *driver,
|
|
struct module *owner, const char *mod_name);
|
|
void scmi_driver_unregister(struct scmi_driver *driver);
|
|
#else
|
|
static inline int
|
|
scmi_driver_register(struct scmi_driver *driver, struct module *owner,
|
|
const char *mod_name)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline void scmi_driver_unregister(struct scmi_driver *driver) {}
|
|
#endif /* CONFIG_ARM_SCMI_PROTOCOL */
|
|
|
|
#define scmi_register(driver) \
|
|
scmi_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
|
|
#define scmi_unregister(driver) \
|
|
scmi_driver_unregister(driver)
|
|
|
|
/**
|
|
* module_scmi_driver() - Helper macro for registering a scmi driver
|
|
* @__scmi_driver: scmi_driver structure
|
|
*
|
|
* Helper macro for scmi drivers to set up proper module init / exit
|
|
* functions. Replaces module_init() and module_exit() and keeps people from
|
|
* printing pointless things to the kernel log when their driver is loaded.
|
|
*/
|
|
#define module_scmi_driver(__scmi_driver) \
|
|
module_driver(__scmi_driver, scmi_register, scmi_unregister)
|
|
|
|
/**
|
|
* module_scmi_protocol() - Helper macro for registering a scmi protocol
|
|
* @__scmi_protocol: scmi_protocol structure
|
|
*
|
|
* Helper macro for scmi drivers to set up proper module init / exit
|
|
* functions. Replaces module_init() and module_exit() and keeps people from
|
|
* printing pointless things to the kernel log when their driver is loaded.
|
|
*/
|
|
#define module_scmi_protocol(__scmi_protocol) \
|
|
module_driver(__scmi_protocol, \
|
|
scmi_protocol_register, scmi_protocol_unregister)
|
|
|
|
struct scmi_protocol;
|
|
int scmi_protocol_register(const struct scmi_protocol *proto);
|
|
void scmi_protocol_unregister(const struct scmi_protocol *proto);
|
|
|
|
/* SCMI Notification API - Custom Event Reports */
|
|
enum scmi_notification_events {
|
|
SCMI_EVENT_POWER_STATE_CHANGED = 0x0,
|
|
SCMI_EVENT_CLOCK_RATE_CHANGED = 0x0,
|
|
SCMI_EVENT_CLOCK_RATE_CHANGE_REQUESTED = 0x1,
|
|
SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED = 0x0,
|
|
SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED = 0x1,
|
|
SCMI_EVENT_SENSOR_TRIP_POINT_EVENT = 0x0,
|
|
SCMI_EVENT_SENSOR_UPDATE = 0x1,
|
|
SCMI_EVENT_RESET_ISSUED = 0x0,
|
|
SCMI_EVENT_BASE_ERROR_EVENT = 0x0,
|
|
SCMI_EVENT_SYSTEM_POWER_STATE_NOTIFIER = 0x0,
|
|
};
|
|
|
|
struct scmi_power_state_changed_report {
|
|
ktime_t timestamp;
|
|
unsigned int agent_id;
|
|
unsigned int domain_id;
|
|
unsigned int power_state;
|
|
};
|
|
|
|
struct scmi_clock_rate_notif_report {
|
|
ktime_t timestamp;
|
|
unsigned int agent_id;
|
|
unsigned int clock_id;
|
|
unsigned long long rate;
|
|
};
|
|
|
|
struct scmi_system_power_state_notifier_report {
|
|
ktime_t timestamp;
|
|
unsigned int agent_id;
|
|
unsigned int flags;
|
|
unsigned int system_state;
|
|
};
|
|
|
|
struct scmi_perf_limits_report {
|
|
ktime_t timestamp;
|
|
unsigned int agent_id;
|
|
unsigned int domain_id;
|
|
unsigned int range_max;
|
|
unsigned int range_min;
|
|
};
|
|
|
|
struct scmi_perf_level_report {
|
|
ktime_t timestamp;
|
|
unsigned int agent_id;
|
|
unsigned int domain_id;
|
|
unsigned int performance_level;
|
|
};
|
|
|
|
struct scmi_sensor_trip_point_report {
|
|
ktime_t timestamp;
|
|
unsigned int agent_id;
|
|
unsigned int sensor_id;
|
|
unsigned int trip_point_desc;
|
|
};
|
|
|
|
struct scmi_sensor_update_report {
|
|
ktime_t timestamp;
|
|
unsigned int agent_id;
|
|
unsigned int sensor_id;
|
|
unsigned int readings_count;
|
|
struct scmi_sensor_reading readings[];
|
|
};
|
|
|
|
struct scmi_reset_issued_report {
|
|
ktime_t timestamp;
|
|
unsigned int agent_id;
|
|
unsigned int domain_id;
|
|
unsigned int reset_state;
|
|
};
|
|
|
|
struct scmi_base_error_report {
|
|
ktime_t timestamp;
|
|
unsigned int agent_id;
|
|
bool fatal;
|
|
unsigned int cmd_count;
|
|
unsigned long long reports[];
|
|
};
|
|
|
|
#endif /* _LINUX_SCMI_PROTOCOL_H */
|