1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __CPUPOWER_HELPERS_SYSFS_H__
3 #define __CPUPOWER_HELPERS_SYSFS_H__
4 
5 #define PATH_TO_CPU "/sys/devices/system/cpu/"
6 #define MAX_LINE_LEN 255
7 #define SYSFS_PATH_MAX 255
8 
9 extern unsigned int sysfs_read_file(const char *path, char *buf, size_t buflen);
10 
11 extern unsigned int sysfs_idlestate_file_exists(unsigned int cpu,
12 						unsigned int idlestate,
13 						const char *fname);
14 
15 extern int sysfs_is_cpu_online(unsigned int cpu);
16 
17 extern int sysfs_is_idlestate_disabled(unsigned int cpu,
18 				       unsigned int idlestate);
19 extern int sysfs_idlestate_disable(unsigned int cpu, unsigned int idlestate,
20 				   unsigned int disable);
21 extern unsigned long sysfs_get_idlestate_latency(unsigned int cpu,
22 						unsigned int idlestate);
23 extern unsigned long sysfs_get_idlestate_usage(unsigned int cpu,
24 					unsigned int idlestate);
25 extern unsigned long long sysfs_get_idlestate_time(unsigned int cpu,
26 						unsigned int idlestate);
27 extern char *sysfs_get_idlestate_name(unsigned int cpu,
28 				unsigned int idlestate);
29 extern char *sysfs_get_idlestate_desc(unsigned int cpu,
30 				unsigned int idlestate);
31 extern unsigned int sysfs_get_idlestate_count(unsigned int cpu);
32 
33 extern char *sysfs_get_cpuidle_governor(void);
34 extern char *sysfs_get_cpuidle_driver(void);
35 
36 extern int sysfs_get_sched(const char *smt_mc);
37 extern int sysfs_set_sched(const char *smt_mc, int val);
38 
39 #endif /* __CPUPOWER_HELPERS_SYSFS_H__ */
40