/* * 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, 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