82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
/*
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* SCPI Message Protocol driver header
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*
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* Copyright (C) 2014 ARM Ltd.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/types.h>
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struct scpi_opp {
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u32 freq;
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u32 m_volt;
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} __packed;
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struct scpi_dvfs_info {
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unsigned int count;
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unsigned int latency; /* in nanoseconds */
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struct scpi_opp *opps;
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};
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enum scpi_sensor_class {
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TEMPERATURE,
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VOLTAGE,
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CURRENT,
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POWER,
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ENERGY,
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};
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struct scpi_sensor_info {
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u16 sensor_id;
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u8 class;
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u8 trigger_type;
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char name[20];
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} __packed;
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/**
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* struct scpi_ops - represents the various operations provided
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* by SCP through SCPI message protocol
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* @get_version: returns the major and minor revision on the SCPI
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* message protocol
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* @clk_get_range: gets clock range limit(min - max in Hz)
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* @clk_get_val: gets clock value(in Hz)
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* @clk_set_val: sets the clock value, setting to 0 will disable the
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* clock (if supported)
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* @dvfs_get_idx: gets the Operating Point of the given power domain.
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* OPP is an index to the list return by @dvfs_get_info
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* @dvfs_set_idx: sets the Operating Point of the given power domain.
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* OPP is an index to the list return by @dvfs_get_info
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* @dvfs_get_info: returns the DVFS capabilities of the given power
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* domain. It includes the OPP list and the latency information
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*/
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struct scpi_ops {
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u32 (*get_version)(void);
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int (*clk_get_range)(u16, unsigned long *, unsigned long *);
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unsigned long (*clk_get_val)(u16);
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int (*clk_set_val)(u16, unsigned long);
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int (*dvfs_get_idx)(u8);
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int (*dvfs_set_idx)(u8, u8);
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struct scpi_dvfs_info *(*dvfs_get_info)(u8);
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int (*sensor_get_capability)(u16 *sensors);
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int (*sensor_get_info)(u16 sensor_id, struct scpi_sensor_info *);
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int (*sensor_get_value)(u16, u64 *);
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int (*device_get_power_state)(u16);
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int (*device_set_power_state)(u16, u8);
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};
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#if IS_REACHABLE(CONFIG_ARM_SCPI_PROTOCOL)
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struct scpi_ops *get_scpi_ops(void);
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#else
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static inline struct scpi_ops *get_scpi_ops(void) { return NULL; }
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#endif
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