| /* 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 */ |