cregit-Linux how code gets into the kernel

Release 4.12 include/linux/scpi_protocol.h

Directory: include/linux
 * 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 <>.
#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 {

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 (*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);

struct scpi_ops *get_scpi_ops(void);

static inline struct scpi_ops *get_scpi_ops(void) { return NULL; }


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Directory: include/linux
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