2019-07-23 13:00:09 +00:00
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/* SPDX-License-Identifier: GPL-2.0-only */
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2017-03-28 10:36:07 +00:00
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/*
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* SCMI Message Protocol driver header
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*
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* Copyright (C) 2018 ARM Ltd.
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*/
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2020-04-03 17:10:17 +00:00
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#ifndef _LINUX_SCMI_PROTOCOL_H
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#define _LINUX_SCMI_PROTOCOL_H
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2017-10-30 18:33:30 +00:00
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#include <linux/device.h>
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2020-07-01 15:53:41 +00:00
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#include <linux/notifier.h>
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2017-03-28 10:36:07 +00:00
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#include <linux/types.h>
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2017-06-06 10:16:15 +00:00
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#define SCMI_MAX_STR_SIZE 16
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2017-06-06 10:27:57 +00:00
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#define SCMI_MAX_NUM_RATES 16
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2017-06-06 10:16:15 +00:00
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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_MAX_STR_SIZE];
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char sub_vendor_id[SCMI_MAX_STR_SIZE];
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};
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2017-06-06 10:27:57 +00:00
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struct scmi_clock_info {
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char name[SCMI_MAX_STR_SIZE];
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bool rate_discrete;
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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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2017-06-06 10:22:51 +00:00
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struct scmi_handle;
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2017-06-06 10:27:57 +00:00
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/**
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* struct scmi_clk_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_ops {
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int (*count_get)(const struct scmi_handle *handle);
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const struct scmi_clock_info *(*info_get)
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(const struct scmi_handle *handle, u32 clk_id);
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int (*rate_get)(const struct scmi_handle *handle, u32 clk_id,
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u64 *rate);
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int (*rate_set)(const struct scmi_handle *handle, u32 clk_id,
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2019-07-08 08:42:22 +00:00
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u64 rate);
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2017-06-06 10:27:57 +00:00
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int (*enable)(const struct scmi_handle *handle, u32 clk_id);
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int (*disable)(const struct scmi_handle *handle, u32 clk_id);
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};
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2017-06-06 10:22:51 +00:00
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/**
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* struct scmi_perf_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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2018-05-09 16:52:06 +00:00
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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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2017-06-06 10:22:51 +00:00
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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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2018-09-10 16:28:10 +00:00
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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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2017-06-06 10:22:51 +00:00
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*/
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struct scmi_perf_ops {
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int (*limits_set)(const struct scmi_handle *handle, u32 domain,
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u32 max_perf, u32 min_perf);
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int (*limits_get)(const struct scmi_handle *handle, u32 domain,
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u32 *max_perf, u32 *min_perf);
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int (*level_set)(const struct scmi_handle *handle, u32 domain,
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2017-07-21 10:42:24 +00:00
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u32 level, bool poll);
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2017-06-06 10:22:51 +00:00
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int (*level_get)(const struct scmi_handle *handle, u32 domain,
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2017-07-21 10:42:24 +00:00
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u32 *level, bool poll);
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2017-06-06 10:22:51 +00:00
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int (*device_domain_id)(struct device *dev);
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2018-05-09 16:52:06 +00:00
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int (*transition_latency_get)(const struct scmi_handle *handle,
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2017-06-06 10:22:51 +00:00
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struct device *dev);
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2018-05-09 16:52:06 +00:00
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int (*device_opps_add)(const struct scmi_handle *handle,
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struct device *dev);
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2017-06-06 10:22:51 +00:00
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int (*freq_set)(const struct scmi_handle *handle, u32 domain,
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2017-07-21 10:42:24 +00:00
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unsigned long rate, bool poll);
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2017-06-06 10:22:51 +00:00
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int (*freq_get)(const struct scmi_handle *handle, u32 domain,
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2017-07-21 10:42:24 +00:00
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unsigned long *rate, bool poll);
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2018-09-10 16:28:10 +00:00
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int (*est_power_get)(const struct scmi_handle *handle, u32 domain,
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unsigned long *rate, unsigned long *power);
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2020-06-17 09:43:31 +00:00
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bool (*fast_switch_possible)(const struct scmi_handle *handle,
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struct device *dev);
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2017-06-06 10:22:51 +00:00
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};
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2017-06-06 10:32:24 +00:00
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/**
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* struct scmi_power_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_ops {
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int (*num_domains_get)(const struct scmi_handle *handle);
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char *(*name_get)(const struct scmi_handle *handle, 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_handle *handle, u32 domain,
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u32 state);
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int (*state_get)(const struct scmi_handle *handle, u32 domain,
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u32 *state);
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};
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2017-06-06 10:38:10 +00:00
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struct scmi_sensor_info {
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u32 id;
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u8 type;
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2019-05-08 18:46:34 +00:00
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s8 scale;
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2019-07-08 08:41:01 +00:00
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u8 num_trip_points;
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bool async;
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2017-06-06 10:38:10 +00:00
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char name[SCMI_MAX_STR_SIZE];
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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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TEMPERATURE_C = 0x2,
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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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};
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/**
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* struct scmi_sensor_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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2019-07-08 08:40:33 +00:00
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* @trip_point_config: selects and configures a trip-point of interest
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2017-06-06 10:38:10 +00:00
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* @reading_get: gets the current value of the sensor
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*/
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struct scmi_sensor_ops {
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int (*count_get)(const struct scmi_handle *handle);
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const struct scmi_sensor_info *(*info_get)
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(const struct scmi_handle *handle, u32 sensor_id);
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2019-07-08 08:40:33 +00:00
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int (*trip_point_config)(const struct scmi_handle *handle,
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u32 sensor_id, u8 trip_id, u64 trip_value);
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2017-06-06 10:38:10 +00:00
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int (*reading_get)(const struct scmi_handle *handle, u32 sensor_id,
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2019-07-08 08:40:57 +00:00
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u64 *value);
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2017-06-06 10:38:10 +00:00
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};
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2019-07-08 08:41:06 +00:00
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/**
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* struct scmi_reset_ops - represents the various operations provided
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* by SCMI Reset Protocol
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*
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* @num_domains_get: get the count of reset domains provided by SCMI
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* @name_get: gets the name of a reset domain
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* @latency_get: gets the reset latency for the specified reset domain
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* @reset: resets the specified reset domain
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* @assert: explicitly assert reset signal of the specified reset domain
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* @deassert: explicitly deassert reset signal of the specified reset domain
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*/
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struct scmi_reset_ops {
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int (*num_domains_get)(const struct scmi_handle *handle);
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char *(*name_get)(const struct scmi_handle *handle, u32 domain);
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int (*latency_get)(const struct scmi_handle *handle, u32 domain);
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int (*reset)(const struct scmi_handle *handle, u32 domain);
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int (*assert)(const struct scmi_handle *handle, u32 domain);
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int (*deassert)(const struct scmi_handle *handle, u32 domain);
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};
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2020-07-01 15:53:41 +00:00
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/**
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* struct scmi_notify_ops - represents notifications' operations provided by
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* SCMI core
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* @register_event_notifier: Register a notifier_block for the requested event
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* @unregister_event_notifier: Unregister a notifier_block for the requested
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* event
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*
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* A user can register/unregister its own notifier_block against the wanted
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* platform instance regarding the desired event identified by the
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* tuple: (proto_id, evt_id, src_id) using the provided register/unregister
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* interface where:
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*
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* @handle: The handle identifying the platform instance to use
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* @proto_id: The protocol ID as in SCMI Specification
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* @evt_id: The message ID of the desired event as in SCMI Specification
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* @src_id: A pointer to the desired source ID if different sources are
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* possible for the protocol (like domain_id, sensor_id...etc)
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*
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* @src_id can be provided as NULL if it simply does NOT make sense for
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* the protocol at hand, OR if the user is explicitly interested in
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* receiving notifications from ANY existent source associated to the
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* specified proto_id / evt_id.
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*
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* Received notifications are finally delivered to the registered users,
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* invoking the callback provided with the notifier_block *nb as follows:
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*
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* int user_cb(nb, evt_id, report)
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*
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* with:
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*
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* @nb: The notifier block provided by the user
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* @evt_id: The message ID of the delivered event
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* @report: A custom struct describing the specific event delivered
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*/
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struct scmi_notify_ops {
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int (*register_event_notifier)(const struct scmi_handle *handle,
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u8 proto_id, u8 evt_id, u32 *src_id,
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struct notifier_block *nb);
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int (*unregister_event_notifier)(const struct scmi_handle *handle,
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u8 proto_id, u8 evt_id, u32 *src_id,
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struct notifier_block *nb);
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};
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2017-03-28 10:36:07 +00:00
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/**
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* struct scmi_handle - Handle returned to ARM SCMI clients for usage.
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*
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* @dev: pointer to the SCMI device
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2017-06-06 10:16:15 +00:00
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* @version: pointer to the structure containing SCMI version information
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2017-06-06 10:32:24 +00:00
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* @power_ops: pointer to set of power protocol operations
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2017-06-06 10:22:51 +00:00
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* @perf_ops: pointer to set of performance protocol operations
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2017-06-06 10:27:57 +00:00
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* @clk_ops: pointer to set of clock protocol operations
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2017-06-06 10:38:10 +00:00
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* @sensor_ops: pointer to set of sensor protocol operations
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2019-07-08 08:41:06 +00:00
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* @reset_ops: pointer to set of reset protocol operations
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2020-07-01 15:53:41 +00:00
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* @notify_ops: pointer to set of notifications related operations
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2018-05-09 16:52:06 +00:00
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* @perf_priv: pointer to private data structure specific to performance
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* protocol(for internal use only)
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* @clk_priv: pointer to private data structure specific to clock
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* protocol(for internal use only)
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* @power_priv: pointer to private data structure specific to power
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* protocol(for internal use only)
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* @sensor_priv: pointer to private data structure specific to sensors
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* protocol(for internal use only)
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2019-07-08 08:41:06 +00:00
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* @reset_priv: pointer to private data structure specific to reset
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* protocol(for internal use only)
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2020-07-01 15:53:40 +00:00
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* @notify_priv: pointer to private data structure specific to notifications
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* (for internal use only)
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2017-03-28 10:36:07 +00:00
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*/
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struct scmi_handle {
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struct device *dev;
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2017-06-06 10:16:15 +00:00
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struct scmi_revision_info *version;
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2017-06-06 10:22:51 +00:00
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struct scmi_perf_ops *perf_ops;
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2017-06-06 10:27:57 +00:00
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struct scmi_clk_ops *clk_ops;
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2017-06-06 10:32:24 +00:00
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struct scmi_power_ops *power_ops;
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2017-06-06 10:38:10 +00:00
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struct scmi_sensor_ops *sensor_ops;
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2019-07-08 08:41:06 +00:00
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struct scmi_reset_ops *reset_ops;
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2020-07-01 15:53:41 +00:00
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struct scmi_notify_ops *notify_ops;
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2017-06-06 10:22:51 +00:00
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/* for protocol internal use */
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void *perf_priv;
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2017-06-06 10:27:57 +00:00
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void *clk_priv;
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2017-06-06 10:32:24 +00:00
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void *power_priv;
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2017-06-06 10:38:10 +00:00
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void *sensor_priv;
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2019-07-08 08:41:06 +00:00
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void *reset_priv;
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2020-07-01 15:53:40 +00:00
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void *notify_priv;
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2017-06-06 10:16:15 +00:00
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};
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enum scmi_std_protocol {
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SCMI_PROTOCOL_BASE = 0x10,
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|
SCMI_PROTOCOL_POWER = 0x11,
|
|
|
|
SCMI_PROTOCOL_SYSTEM = 0x12,
|
|
|
|
SCMI_PROTOCOL_PERF = 0x13,
|
|
|
|
SCMI_PROTOCOL_CLOCK = 0x14,
|
|
|
|
SCMI_PROTOCOL_SENSOR = 0x15,
|
2019-07-08 08:41:06 +00:00
|
|
|
SCMI_PROTOCOL_RESET = 0x16,
|
2017-03-28 10:36:07 +00:00
|
|
|
};
|
2017-10-30 18:33:30 +00:00
|
|
|
|
|
|
|
struct scmi_device {
|
|
|
|
u32 id;
|
|
|
|
u8 protocol_id;
|
2018-12-21 18:08:08 +00:00
|
|
|
const char *name;
|
2017-10-30 18:33:30 +00:00
|
|
|
struct device dev;
|
|
|
|
struct scmi_handle *handle;
|
|
|
|
};
|
|
|
|
|
|
|
|
#define to_scmi_dev(d) container_of(d, struct scmi_device, dev)
|
|
|
|
|
|
|
|
struct scmi_device *
|
2018-12-21 18:08:08 +00:00
|
|
|
scmi_device_create(struct device_node *np, struct device *parent, int protocol,
|
|
|
|
const char *name);
|
2017-10-30 18:33:30 +00:00
|
|
|
void scmi_device_destroy(struct scmi_device *scmi_dev);
|
|
|
|
|
|
|
|
struct scmi_device_id {
|
|
|
|
u8 protocol_id;
|
2018-12-21 18:08:08 +00:00
|
|
|
const char *name;
|
2017-10-30 18:33:30 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
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)
|
|
|
|
|
|
|
|
#ifdef 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)
|
|
|
|
|
|
|
|
typedef int (*scmi_prot_init_fn_t)(struct scmi_handle *);
|
|
|
|
int scmi_protocol_register(int protocol_id, scmi_prot_init_fn_t fn);
|
|
|
|
void scmi_protocol_unregister(int protocol_id);
|
2020-04-03 17:10:17 +00:00
|
|
|
|
2020-07-01 15:53:44 +00:00
|
|
|
/* SCMI Notification API - Custom Event Reports */
|
|
|
|
enum scmi_notification_events {
|
|
|
|
SCMI_EVENT_POWER_STATE_CHANGED = 0x0,
|
2020-07-01 15:53:45 +00:00
|
|
|
SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED = 0x0,
|
|
|
|
SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED = 0x1,
|
2020-07-01 15:53:46 +00:00
|
|
|
SCMI_EVENT_SENSOR_TRIP_POINT_EVENT = 0x0,
|
2020-07-01 15:53:47 +00:00
|
|
|
SCMI_EVENT_RESET_ISSUED = 0x0,
|
2020-07-01 15:53:48 +00:00
|
|
|
SCMI_EVENT_BASE_ERROR_EVENT = 0x0,
|
2020-07-01 15:53:44 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
struct scmi_power_state_changed_report {
|
2020-07-10 13:39:19 +00:00
|
|
|
ktime_t timestamp;
|
|
|
|
unsigned int agent_id;
|
|
|
|
unsigned int domain_id;
|
|
|
|
unsigned int power_state;
|
2020-07-01 15:53:44 +00:00
|
|
|
};
|
|
|
|
|
2020-07-01 15:53:45 +00:00
|
|
|
struct scmi_perf_limits_report {
|
2020-07-10 13:39:19 +00:00
|
|
|
ktime_t timestamp;
|
|
|
|
unsigned int agent_id;
|
|
|
|
unsigned int domain_id;
|
|
|
|
unsigned int range_max;
|
|
|
|
unsigned int range_min;
|
2020-07-01 15:53:45 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
struct scmi_perf_level_report {
|
2020-07-10 13:39:19 +00:00
|
|
|
ktime_t timestamp;
|
|
|
|
unsigned int agent_id;
|
|
|
|
unsigned int domain_id;
|
|
|
|
unsigned int performance_level;
|
2020-07-01 15:53:45 +00:00
|
|
|
};
|
|
|
|
|
2020-07-01 15:53:46 +00:00
|
|
|
struct scmi_sensor_trip_point_report {
|
2020-07-10 13:39:19 +00:00
|
|
|
ktime_t timestamp;
|
|
|
|
unsigned int agent_id;
|
|
|
|
unsigned int sensor_id;
|
|
|
|
unsigned int trip_point_desc;
|
2020-07-01 15:53:46 +00:00
|
|
|
};
|
|
|
|
|
2020-07-01 15:53:47 +00:00
|
|
|
struct scmi_reset_issued_report {
|
2020-07-10 13:39:19 +00:00
|
|
|
ktime_t timestamp;
|
|
|
|
unsigned int agent_id;
|
|
|
|
unsigned int domain_id;
|
|
|
|
unsigned int reset_state;
|
2020-07-01 15:53:47 +00:00
|
|
|
};
|
|
|
|
|
2020-07-01 15:53:48 +00:00
|
|
|
struct scmi_base_error_report {
|
2020-07-10 13:39:19 +00:00
|
|
|
ktime_t timestamp;
|
|
|
|
unsigned int agent_id;
|
|
|
|
bool fatal;
|
|
|
|
unsigned int cmd_count;
|
|
|
|
unsigned long long reports[];
|
2020-07-01 15:53:48 +00:00
|
|
|
};
|
|
|
|
|
2020-04-03 17:10:17 +00:00
|
|
|
#endif /* _LINUX_SCMI_PROTOCOL_H */
|