kernel/tools/power/cpupower/lib/cpufreq.c

   1 /*
   2  *  (C) 2004-2009  Dominik Brodowski <linux@dominikbrodowski.de>
   3  *
   4  *  Licensed under the terms of the GNU GPL License version 2.
   5  */
   6
   7
   8 #include <stdio.h>
   9 #include <errno.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12
  13 #include "cpufreq.h"
  14 #include "sysfs.h"
  15
  16 int cpufreq_cpu_exists(unsigned int cpu)
  17 {
  18         return sysfs_cpu_exists(cpu);
  19 }
  20
  21 unsigned long cpufreq_get_freq_kernel(unsigned int cpu)
  22 {
  23         return sysfs_get_freq_kernel(cpu);
  24 }
  25
  26 unsigned long cpufreq_get_freq_hardware(unsigned int cpu)
  27 {
  28         return sysfs_get_freq_hardware(cpu);
  29 }
  30
  31 unsigned long cpufreq_get_transition_latency(unsigned int cpu)
  32 {
  33         return sysfs_get_freq_transition_latency(cpu);
  34 }
  35
  36 int cpufreq_get_hardware_limits(unsigned int cpu,
  37                                 unsigned long *min,
  38                                 unsigned long *max)
  39 {
  40         if ((!min) || (!max))
  41                 return -EINVAL;
  42         return sysfs_get_freq_hardware_limits(cpu, min, max);
  43 }
  44
  45 char *cpufreq_get_driver(unsigned int cpu)
  46 {
  47         return sysfs_get_freq_driver(cpu);
  48 }
  49
  50 void cpufreq_put_driver(char *ptr)
  51 {
  52         if (!ptr)
  53                 return;
  54         free(ptr);
  55 }
  56
  57 struct cpufreq_policy *cpufreq_get_policy(unsigned int cpu)
  58 {
  59         return sysfs_get_freq_policy(cpu);
  60 }
  61
  62 void cpufreq_put_policy(struct cpufreq_policy *policy)
  63 {
  64         if ((!policy) || (!policy->governor))
  65                 return;
  66
  67         free(policy->governor);
  68         policy->governor = NULL;
  69         free(policy);
  70 }
  71
  72 struct cpufreq_available_governors *cpufreq_get_available_governors(unsigned
  73                                                                 int cpu)
  74 {
  75         return sysfs_get_freq_available_governors(cpu);
  76 }
  77
  78 void cpufreq_put_available_governors(struct cpufreq_available_governors *any)
  79 {
  80         struct cpufreq_available_governors *tmp, *next;
  81
  82         if (!any)
  83                 return;
  84
  85         tmp = any->first;
  86         while (tmp) {
  87                 next = tmp->next;
  88                 if (tmp->governor)
  89                         free(tmp->governor);
  90                 free(tmp);
  91                 tmp = next;
  92         }
  93 }
  94
  95
  96 struct cpufreq_available_frequencies
  97 *cpufreq_get_available_frequencies(unsigned int cpu)
  98 {
  99         return sysfs_get_available_frequencies(cpu);
 100 }
 101
 102 void cpufreq_put_available_frequencies(struct cpufreq_available_frequencies
 103                                 *any) {
 104         struct cpufreq_available_frequencies *tmp, *next;
 105
 106         if (!any)
 107                 return;
 108
 109         tmp = any->first;
 110         while (tmp) {
 111                 next = tmp->next;
 112                 free(tmp);
 113                 tmp = next;
 114         }
 115 }
 116
 117
 118 struct cpufreq_affected_cpus *cpufreq_get_affected_cpus(unsigned int cpu)
 119 {
 120         return sysfs_get_freq_affected_cpus(cpu);
 121 }
 122
 123 void cpufreq_put_affected_cpus(struct cpufreq_affected_cpus *any)
 124 {
 125         struct cpufreq_affected_cpus *tmp, *next;
 126
 127         if (!any)
 128                 return;
 129
 130         tmp = any->first;
 131         while (tmp) {
 132                 next = tmp->next;
 133                 free(tmp);
 134                 tmp = next;
 135         }
 136 }
 137
 138
 139 struct cpufreq_affected_cpus *cpufreq_get_related_cpus(unsigned int cpu)
 140 {
 141         return sysfs_get_freq_related_cpus(cpu);
 142 }
 143
 144 void cpufreq_put_related_cpus(struct cpufreq_affected_cpus *any)
 145 {
 146         cpufreq_put_affected_cpus(any);
 147 }
 148
 149
 150 int cpufreq_set_policy(unsigned int cpu, struct cpufreq_policy *policy)
 151 {
 152         if (!policy || !(policy->governor))
 153                 return -EINVAL;
 154
 155         return sysfs_set_freq_policy(cpu, policy);
 156 }
 157
 158
 159 int cpufreq_modify_policy_min(unsigned int cpu, unsigned long min_freq)
 160 {
 161         return sysfs_modify_freq_policy_min(cpu, min_freq);
 162 }
 163
 164
 165 int cpufreq_modify_policy_max(unsigned int cpu, unsigned long max_freq)
 166 {
 167         return sysfs_modify_freq_policy_max(cpu, max_freq);
 168 }
 169
 170
 171 int cpufreq_modify_policy_governor(unsigned int cpu, char *governor)
 172 {
 173         if ((!governor) || (strlen(governor) > 19))
 174                 return -EINVAL;
 175
 176         return sysfs_modify_freq_policy_governor(cpu, governor);
 177 }
 178
 179 int cpufreq_set_frequency(unsigned int cpu, unsigned long target_frequency)
 180 {
 181         return sysfs_set_frequency(cpu, target_frequency);
 182 }
 183
 184 struct cpufreq_stats *cpufreq_get_stats(unsigned int cpu,
 185                                         unsigned long long *total_time)
 186 {
 187         return sysfs_get_freq_stats(cpu, total_time);
 188 }
 189
 190 void cpufreq_put_stats(struct cpufreq_stats *any)
 191 {
 192         struct cpufreq_stats *tmp, *next;
 193
 194         if (!any)
 195                 return;
 196
 197         tmp = any->first;
 198         while (tmp) {
 199                 next = tmp->next;
 200                 free(tmp);
 201                 tmp = next;
 202         }
 203 }
 204
 205 unsigned long cpufreq_get_transitions(unsigned int cpu)
 206 {
 207         return sysfs_get_freq_transitions(cpu);
 208 }