xref: /openbmc/linux/tools/power/cpupower/lib/cpufreq.c (revision a8fe58ce) 
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 }
209