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Diffstat (limited to '')
-rw-r--r-- | include/linux/scpi_protocol.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/include/linux/scpi_protocol.h b/include/linux/scpi_protocol.h new file mode 100644 index 000000000..afbf8037d --- /dev/null +++ b/include/linux/scpi_protocol.h @@ -0,0 +1,79 @@ +/* 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 */ |