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79 lines
2.1 KiB
79 lines
2.1 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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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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#ifndef _LINUX_SCPI_PROTOCOL_H |
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#define _LINUX_SCPI_PROTOCOL_H |
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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 (*device_domain_id)(struct device *); |
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int (*get_transition_latency)(struct device *); |
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int (*add_opps_to_device)(struct device *); |
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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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#endif /* _LINUX_SCPI_PROTOCOL_H */
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