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- /* SPDX-License-Identifier: GPL-2.0-only */
- /*
- * SCPI Message Protocol driver header
- *
- * Copyright (C) 2014 ARM Ltd.
- */
- #ifndef _LINUX_SCPI_PROTOCOL_H
- #define _LINUX_SCPI_PROTOCOL_H
- #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,
- ENERGY,
- };
- 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 (*device_domain_id)(struct device *);
- int (*get_transition_latency)(struct device *);
- int (*add_opps_to_device)(struct device *);
- int (*sensor_get_capability)(u16 *sensors);
- int (*sensor_get_info)(u16 sensor_id, struct scpi_sensor_info *);
- int (*sensor_get_value)(u16, u64 *);
- int (*device_get_power_state)(u16);
- int (*device_set_power_state)(u16, u8);
- };
- #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
- #endif /* _LINUX_SCPI_PROTOCOL_H */
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