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