blob: 0fe251865ac6a468963637f4f3be6676c7d985c8 [file] [log] [blame]
Dave Jonesb9170832005-05-31 19:03:47 -07001/*
2 * drivers/cpufreq/cpufreq_conservative.c
3 *
4 * Copyright (C) 2001 Russell King
5 * (C) 2003 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>.
6 * Jun Nakajima <jun.nakajima@intel.com>
Alexander Clouter11a80a9c762009-02-13 19:01:01 +00007 * (C) 2009 Alexander Clouter <alex@digriz.org.uk>
Dave Jonesb9170832005-05-31 19:03:47 -07008 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
Viresh Kumar4d5dcc42013-03-27 15:58:58 +000014#include <linux/slab.h>
Viresh Kumar4471a342012-10-26 00:47:42 +020015#include "cpufreq_governor.h"
Dave Jonesb9170832005-05-31 19:03:47 -070016
Rafael J. Wysocki7d5a9952016-02-18 18:40:14 +010017struct cs_policy_dbs_info {
18 struct policy_dbs_info policy_dbs;
19 unsigned int down_skip;
Rafael J. Wysockiabb66272016-10-12 21:47:03 +020020 unsigned int requested_freq;
Rafael J. Wysocki7d5a9952016-02-18 18:40:14 +010021};
22
23static inline struct cs_policy_dbs_info *to_dbs_info(struct policy_dbs_info *policy_dbs)
24{
25 return container_of(policy_dbs, struct cs_policy_dbs_info, policy_dbs);
26}
27
Rafael J. Wysocki47ebaac2016-02-18 18:41:36 +010028struct cs_dbs_tuners {
29 unsigned int down_threshold;
30 unsigned int freq_step;
31};
32
Stratos Karafotisc88883c2013-02-08 17:24:24 +000033/* Conservative governor macros */
Dave Jonesb9170832005-05-31 19:03:47 -070034#define DEF_FREQUENCY_UP_THRESHOLD (80)
Dave Jonesb9170832005-05-31 19:03:47 -070035#define DEF_FREQUENCY_DOWN_THRESHOLD (20)
Stratos Karafotis98765842013-03-22 08:03:17 +000036#define DEF_FREQUENCY_STEP (5)
Alexander Clouter2c906b32006-03-22 09:54:10 +000037#define DEF_SAMPLING_DOWN_FACTOR (1)
38#define MAX_SAMPLING_DOWN_FACTOR (10)
Dave Jonesb9170832005-05-31 19:03:47 -070039
Stratos Karafotis98765842013-03-22 08:03:17 +000040static inline unsigned int get_freq_target(struct cs_dbs_tuners *cs_tuners,
41 struct cpufreq_policy *policy)
42{
43 unsigned int freq_target = (cs_tuners->freq_step * policy->max) / 100;
44
45 /* max freq cannot be less than 100. But who knows... */
46 if (unlikely(freq_target == 0))
47 freq_target = DEF_FREQUENCY_STEP;
48
49 return freq_target;
50}
51
Viresh Kumar4471a342012-10-26 00:47:42 +020052/*
53 * Every sampling_rate, we check, if current idle time is less than 20%
Stratos Karafotis7af1c052013-03-05 22:06:29 +000054 * (default), then we try to increase frequency. Every sampling_rate *
55 * sampling_down_factor, we check, if current idle time is more than 80%
56 * (default), then we try to decrease frequency
Viresh Kumar4471a342012-10-26 00:47:42 +020057 *
58 * Any frequency increase takes it to the maximum frequency. Frequency reduction
59 * happens at minimum steps of 5% (default) of maximum frequency
60 */
Rafael J. Wysocki4cccf752016-02-15 02:19:31 +010061static unsigned int cs_dbs_timer(struct cpufreq_policy *policy)
Elias Oltmannsa8d7c3b2007-10-22 09:50:13 +020062{
Rafael J. Wysockibc505472016-02-07 16:24:26 +010063 struct policy_dbs_info *policy_dbs = policy->governor_data;
Rafael J. Wysocki7d5a9952016-02-18 18:40:14 +010064 struct cs_policy_dbs_info *dbs_info = to_dbs_info(policy_dbs);
Rafael J. Wysockiabb66272016-10-12 21:47:03 +020065 unsigned int requested_freq = dbs_info->requested_freq;
Rafael J. Wysockibc505472016-02-07 16:24:26 +010066 struct dbs_data *dbs_data = policy_dbs->dbs_data;
Viresh Kumar4d5dcc42013-03-27 15:58:58 +000067 struct cs_dbs_tuners *cs_tuners = dbs_data->tuners;
Rafael J. Wysocki4cccf752016-02-15 02:19:31 +010068 unsigned int load = dbs_update(policy);
Alexander Clouterf407a082009-02-13 19:01:51 +000069
70 /*
Viresh Kumar4471a342012-10-26 00:47:42 +020071 * break out if we 'cannot' reduce the speed as the user might
72 * want freq_step to be zero
73 */
Viresh Kumar4d5dcc42013-03-27 15:58:58 +000074 if (cs_tuners->freq_step == 0)
Rafael J. Wysocki4cccf752016-02-15 02:19:31 +010075 goto out;
Viresh Kumar4471a342012-10-26 00:47:42 +020076
Rafael J. Wysockiabb66272016-10-12 21:47:03 +020077 /*
78 * If requested_freq is out of range, it is likely that the limits
79 * changed in the meantime, so fall back to current frequency in that
80 * case.
81 */
82 if (requested_freq > policy->max || requested_freq < policy->min)
83 requested_freq = policy->cur;
84
Viresh Kumar4471a342012-10-26 00:47:42 +020085 /* Check for frequency increase */
Viresh Kumarff4b1782016-02-09 09:01:32 +053086 if (load > dbs_data->up_threshold) {
Viresh Kumar4471a342012-10-26 00:47:42 +020087 dbs_info->down_skip = 0;
88
89 /* if we are already at full speed then break out early */
Rafael J. Wysockid352cf42016-06-13 23:33:49 +020090 if (requested_freq == policy->max)
Rafael J. Wysocki4cccf752016-02-15 02:19:31 +010091 goto out;
Viresh Kumar4471a342012-10-26 00:47:42 +020092
Rafael J. Wysockid352cf42016-06-13 23:33:49 +020093 requested_freq += get_freq_target(cs_tuners, policy);
Rafael J. Wysockiabb66272016-10-12 21:47:03 +020094 if (requested_freq > policy->max)
95 requested_freq = policy->max;
Viresh Kumar4471a342012-10-26 00:47:42 +020096
Rafael J. Wysockid352cf42016-06-13 23:33:49 +020097 __cpufreq_driver_target(policy, requested_freq, CPUFREQ_RELATION_H);
Rafael J. Wysockiabb66272016-10-12 21:47:03 +020098 dbs_info->requested_freq = requested_freq;
Rafael J. Wysocki4cccf752016-02-15 02:19:31 +010099 goto out;
Viresh Kumar4471a342012-10-26 00:47:42 +0200100 }
101
Stratos Karafotis7af1c052013-03-05 22:06:29 +0000102 /* if sampling_down_factor is active break out early */
Viresh Kumarff4b1782016-02-09 09:01:32 +0530103 if (++dbs_info->down_skip < dbs_data->sampling_down_factor)
Rafael J. Wysocki4cccf752016-02-15 02:19:31 +0100104 goto out;
Stratos Karafotis7af1c052013-03-05 22:06:29 +0000105 dbs_info->down_skip = 0;
106
Stratos Karafotis27ed3cd2013-03-05 22:06:40 +0000107 /* Check for frequency decrease */
108 if (load < cs_tuners->down_threshold) {
Rafael J. Wysockiabb66272016-10-12 21:47:03 +0200109 unsigned int freq_target;
Viresh Kumar4471a342012-10-26 00:47:42 +0200110 /*
111 * if we cannot reduce the frequency anymore, break out early
112 */
Rafael J. Wysockid352cf42016-06-13 23:33:49 +0200113 if (requested_freq == policy->min)
Rafael J. Wysocki4cccf752016-02-15 02:19:31 +0100114 goto out;
Viresh Kumar4471a342012-10-26 00:47:42 +0200115
Xiaoguang Chen3baa9762013-11-07 10:28:50 +0800116 freq_target = get_freq_target(cs_tuners, policy);
Rafael J. Wysockid352cf42016-06-13 23:33:49 +0200117 if (requested_freq > freq_target)
118 requested_freq -= freq_target;
Xiaoguang Chen3baa9762013-11-07 10:28:50 +0800119 else
Rafael J. Wysockid352cf42016-06-13 23:33:49 +0200120 requested_freq = policy->min;
Namhyung Kimad529a92013-02-28 05:38:01 +0000121
Rafael J. Wysockid352cf42016-06-13 23:33:49 +0200122 __cpufreq_driver_target(policy, requested_freq, CPUFREQ_RELATION_L);
Rafael J. Wysockiabb66272016-10-12 21:47:03 +0200123 dbs_info->requested_freq = requested_freq;
Viresh Kumar4471a342012-10-26 00:47:42 +0200124 }
Viresh Kumar4471a342012-10-26 00:47:42 +0200125
Rafael J. Wysocki4cccf752016-02-15 02:19:31 +0100126 out:
Rafael J. Wysocki07aa4402016-02-15 02:22:13 +0100127 return dbs_data->sampling_rate;
Fabio Baltieri66df2a012012-12-27 14:55:41 +0000128}
Viresh Kumar44472662013-01-31 17:28:02 +0000129
Dave Jonesb9170832005-05-31 19:03:47 -0700130/************************** sysfs interface ************************/
Dave Jonesb9170832005-05-31 19:03:47 -0700131
Rafael J. Wysocki0dd3c1d2016-03-22 02:47:51 +0100132static ssize_t store_sampling_down_factor(struct gov_attr_set *attr_set,
133 const char *buf, size_t count)
Dave Jonesb9170832005-05-31 19:03:47 -0700134{
Rafael J. Wysocki0dd3c1d2016-03-22 02:47:51 +0100135 struct dbs_data *dbs_data = to_dbs_data(attr_set);
Dave Jonesb9170832005-05-31 19:03:47 -0700136 unsigned int input;
137 int ret;
Dave Jones9acef482009-01-18 01:39:51 -0500138 ret = sscanf(buf, "%u", &input);
Alexander Clouter8e677ce2009-02-13 19:02:34 +0000139
Alexander Clouter2c906b32006-03-22 09:54:10 +0000140 if (ret != 1 || input > MAX_SAMPLING_DOWN_FACTOR || input < 1)
Dave Jonesb9170832005-05-31 19:03:47 -0700141 return -EINVAL;
142
Viresh Kumarff4b1782016-02-09 09:01:32 +0530143 dbs_data->sampling_down_factor = input;
Dave Jonesb9170832005-05-31 19:03:47 -0700144 return count;
145}
146
Rafael J. Wysocki0dd3c1d2016-03-22 02:47:51 +0100147static ssize_t store_up_threshold(struct gov_attr_set *attr_set,
148 const char *buf, size_t count)
Dave Jonesb9170832005-05-31 19:03:47 -0700149{
Rafael J. Wysocki0dd3c1d2016-03-22 02:47:51 +0100150 struct dbs_data *dbs_data = to_dbs_data(attr_set);
Viresh Kumar4d5dcc42013-03-27 15:58:58 +0000151 struct cs_dbs_tuners *cs_tuners = dbs_data->tuners;
Dave Jonesb9170832005-05-31 19:03:47 -0700152 unsigned int input;
153 int ret;
Dave Jones9acef482009-01-18 01:39:51 -0500154 ret = sscanf(buf, "%u", &input);
Dave Jonesb9170832005-05-31 19:03:47 -0700155
Viresh Kumar4d5dcc42013-03-27 15:58:58 +0000156 if (ret != 1 || input > 100 || input <= cs_tuners->down_threshold)
Dave Jonesb9170832005-05-31 19:03:47 -0700157 return -EINVAL;
Dave Jonesb9170832005-05-31 19:03:47 -0700158
Viresh Kumarff4b1782016-02-09 09:01:32 +0530159 dbs_data->up_threshold = input;
Dave Jonesb9170832005-05-31 19:03:47 -0700160 return count;
161}
162
Rafael J. Wysocki0dd3c1d2016-03-22 02:47:51 +0100163static ssize_t store_down_threshold(struct gov_attr_set *attr_set,
164 const char *buf, size_t count)
Dave Jonesb9170832005-05-31 19:03:47 -0700165{
Rafael J. Wysocki0dd3c1d2016-03-22 02:47:51 +0100166 struct dbs_data *dbs_data = to_dbs_data(attr_set);
Viresh Kumar4d5dcc42013-03-27 15:58:58 +0000167 struct cs_dbs_tuners *cs_tuners = dbs_data->tuners;
Dave Jonesb9170832005-05-31 19:03:47 -0700168 unsigned int input;
169 int ret;
Dave Jones9acef482009-01-18 01:39:51 -0500170 ret = sscanf(buf, "%u", &input);
Dave Jonesb9170832005-05-31 19:03:47 -0700171
Tomasz Wilczyński5d5605c2017-06-11 17:28:39 +0900172 /* cannot be lower than 1 otherwise freq will not fall */
173 if (ret != 1 || input < 1 || input > 100 ||
Viresh Kumarff4b1782016-02-09 09:01:32 +0530174 input >= dbs_data->up_threshold)
Dave Jonesb9170832005-05-31 19:03:47 -0700175 return -EINVAL;
Dave Jonesb9170832005-05-31 19:03:47 -0700176
Viresh Kumar4d5dcc42013-03-27 15:58:58 +0000177 cs_tuners->down_threshold = input;
Dave Jonesb9170832005-05-31 19:03:47 -0700178 return count;
179}
180
Rafael J. Wysocki0dd3c1d2016-03-22 02:47:51 +0100181static ssize_t store_ignore_nice_load(struct gov_attr_set *attr_set,
182 const char *buf, size_t count)
Dave Jonesb9170832005-05-31 19:03:47 -0700183{
Rafael J. Wysocki0dd3c1d2016-03-22 02:47:51 +0100184 struct dbs_data *dbs_data = to_dbs_data(attr_set);
Rafael J. Wysockia33cce12016-02-18 02:26:55 +0100185 unsigned int input;
Dave Jonesb9170832005-05-31 19:03:47 -0700186 int ret;
187
Dave Jones18a72472007-10-22 16:49:09 -0400188 ret = sscanf(buf, "%u", &input);
189 if (ret != 1)
Dave Jonesb9170832005-05-31 19:03:47 -0700190 return -EINVAL;
191
Dave Jones18a72472007-10-22 16:49:09 -0400192 if (input > 1)
Dave Jonesb9170832005-05-31 19:03:47 -0700193 input = 1;
Dave Jones18a72472007-10-22 16:49:09 -0400194
Viresh Kumarff4b1782016-02-09 09:01:32 +0530195 if (input == dbs_data->ignore_nice_load) /* nothing to do */
Dave Jonesb9170832005-05-31 19:03:47 -0700196 return count;
Thomas Renninger326c86d2011-03-03 21:31:27 +0100197
Viresh Kumarff4b1782016-02-09 09:01:32 +0530198 dbs_data->ignore_nice_load = input;
Dave Jonesb9170832005-05-31 19:03:47 -0700199
Alexander Clouter8e677ce2009-02-13 19:02:34 +0000200 /* we need to re-evaluate prev_cpu_idle */
Rafael J. Wysocki8c8f77f2016-02-21 00:51:27 +0100201 gov_update_cpu_data(dbs_data);
Rafael J. Wysockia33cce12016-02-18 02:26:55 +0100202
Dave Jonesb9170832005-05-31 19:03:47 -0700203 return count;
204}
205
Rafael J. Wysocki0dd3c1d2016-03-22 02:47:51 +0100206static ssize_t store_freq_step(struct gov_attr_set *attr_set, const char *buf,
207 size_t count)
Dave Jonesb9170832005-05-31 19:03:47 -0700208{
Rafael J. Wysocki0dd3c1d2016-03-22 02:47:51 +0100209 struct dbs_data *dbs_data = to_dbs_data(attr_set);
Viresh Kumar4d5dcc42013-03-27 15:58:58 +0000210 struct cs_dbs_tuners *cs_tuners = dbs_data->tuners;
Dave Jonesb9170832005-05-31 19:03:47 -0700211 unsigned int input;
212 int ret;
Dave Jones18a72472007-10-22 16:49:09 -0400213 ret = sscanf(buf, "%u", &input);
Dave Jonesb9170832005-05-31 19:03:47 -0700214
Dave Jones18a72472007-10-22 16:49:09 -0400215 if (ret != 1)
Dave Jonesb9170832005-05-31 19:03:47 -0700216 return -EINVAL;
217
Dave Jones18a72472007-10-22 16:49:09 -0400218 if (input > 100)
Dave Jonesb9170832005-05-31 19:03:47 -0700219 input = 100;
Dave Jones18a72472007-10-22 16:49:09 -0400220
Viresh Kumar4471a342012-10-26 00:47:42 +0200221 /*
222 * no need to test here if freq_step is zero as the user might actually
223 * want this, they would be crazy though :)
224 */
Viresh Kumar4d5dcc42013-03-27 15:58:58 +0000225 cs_tuners->freq_step = input;
Dave Jonesb9170832005-05-31 19:03:47 -0700226 return count;
227}
228
Viresh Kumarc4435632016-02-09 09:01:33 +0530229gov_show_one_common(sampling_rate);
230gov_show_one_common(sampling_down_factor);
231gov_show_one_common(up_threshold);
232gov_show_one_common(ignore_nice_load);
233gov_show_one_common(min_sampling_rate);
234gov_show_one(cs, down_threshold);
235gov_show_one(cs, freq_step);
Viresh Kumar4471a342012-10-26 00:47:42 +0200236
Viresh Kumarc4435632016-02-09 09:01:33 +0530237gov_attr_rw(sampling_rate);
238gov_attr_rw(sampling_down_factor);
239gov_attr_rw(up_threshold);
240gov_attr_rw(ignore_nice_load);
241gov_attr_ro(min_sampling_rate);
242gov_attr_rw(down_threshold);
243gov_attr_rw(freq_step);
Dave Jonesb9170832005-05-31 19:03:47 -0700244
Viresh Kumarc4435632016-02-09 09:01:33 +0530245static struct attribute *cs_attributes[] = {
246 &min_sampling_rate.attr,
247 &sampling_rate.attr,
248 &sampling_down_factor.attr,
249 &up_threshold.attr,
250 &down_threshold.attr,
251 &ignore_nice_load.attr,
252 &freq_step.attr,
Dave Jonesb9170832005-05-31 19:03:47 -0700253 NULL
254};
255
Dave Jonesb9170832005-05-31 19:03:47 -0700256/************************** sysfs end ************************/
257
Rafael J. Wysocki7d5a9952016-02-18 18:40:14 +0100258static struct policy_dbs_info *cs_alloc(void)
259{
260 struct cs_policy_dbs_info *dbs_info;
261
262 dbs_info = kzalloc(sizeof(*dbs_info), GFP_KERNEL);
263 return dbs_info ? &dbs_info->policy_dbs : NULL;
264}
265
266static void cs_free(struct policy_dbs_info *policy_dbs)
267{
268 kfree(to_dbs_info(policy_dbs));
269}
270
Rafael J. Wysocki9a15fb22016-05-18 22:59:49 +0200271static int cs_init(struct dbs_data *dbs_data)
Viresh Kumar4d5dcc42013-03-27 15:58:58 +0000272{
273 struct cs_dbs_tuners *tuners;
274
Viresh Kumard5b73cd2013-08-06 22:53:06 +0530275 tuners = kzalloc(sizeof(*tuners), GFP_KERNEL);
Viresh Kumara69d6b22016-05-18 17:55:26 +0530276 if (!tuners)
Viresh Kumar4d5dcc42013-03-27 15:58:58 +0000277 return -ENOMEM;
Viresh Kumar4d5dcc42013-03-27 15:58:58 +0000278
Viresh Kumar4d5dcc42013-03-27 15:58:58 +0000279 tuners->down_threshold = DEF_FREQUENCY_DOWN_THRESHOLD;
Stratos Karafotis98765842013-03-22 08:03:17 +0000280 tuners->freq_step = DEF_FREQUENCY_STEP;
Viresh Kumarff4b1782016-02-09 09:01:32 +0530281 dbs_data->up_threshold = DEF_FREQUENCY_UP_THRESHOLD;
282 dbs_data->sampling_down_factor = DEF_SAMPLING_DOWN_FACTOR;
283 dbs_data->ignore_nice_load = 0;
Viresh Kumar4d5dcc42013-03-27 15:58:58 +0000284
285 dbs_data->tuners = tuners;
286 dbs_data->min_sampling_rate = MIN_SAMPLING_RATE_RATIO *
287 jiffies_to_usecs(10);
Viresh Kumar8e0484d2015-06-03 15:57:11 +0530288
Viresh Kumar4d5dcc42013-03-27 15:58:58 +0000289 return 0;
290}
291
Rafael J. Wysocki9a15fb22016-05-18 22:59:49 +0200292static void cs_exit(struct dbs_data *dbs_data)
Viresh Kumar4d5dcc42013-03-27 15:58:58 +0000293{
294 kfree(dbs_data->tuners);
295}
296
Rafael J. Wysocki702c9e52016-02-18 02:21:21 +0100297static void cs_start(struct cpufreq_policy *policy)
298{
Rafael J. Wysocki7d5a9952016-02-18 18:40:14 +0100299 struct cs_policy_dbs_info *dbs_info = to_dbs_info(policy->governor_data);
Rafael J. Wysocki702c9e52016-02-18 02:21:21 +0100300
301 dbs_info->down_skip = 0;
Rafael J. Wysockiabb66272016-10-12 21:47:03 +0200302 dbs_info->requested_freq = policy->cur;
Rafael J. Wysocki702c9e52016-02-18 02:21:21 +0100303}
304
Sven Wegener52e61ad2008-09-20 16:50:08 +0200305#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE
306static
307#endif
Amit Pundira9a82662017-01-30 13:55:23 +0530308struct dbs_governor cs_governor = {
Rafael J. Wysockid352cf42016-06-13 23:33:49 +0200309 .gov = CPUFREQ_DBS_GOVERNOR_INITIALIZER("conservative"),
310 .kobj_type = { .default_attrs = cs_attributes },
311 .gov_dbs_timer = cs_dbs_timer,
312 .alloc = cs_alloc,
313 .free = cs_free,
314 .init = cs_init,
315 .exit = cs_exit,
316 .start = cs_start,
Viresh Kumar4471a342012-10-26 00:47:42 +0200317};
Dave Jonesb9170832005-05-31 19:03:47 -0700318
Rafael J. Wysockid352cf42016-06-13 23:33:49 +0200319#define CPU_FREQ_GOV_CONSERVATIVE (&cs_governor.gov)
Rafael J. Wysockiaf926182016-02-05 03:16:08 +0100320
Dave Jonesb9170832005-05-31 19:03:47 -0700321static int __init cpufreq_gov_dbs_init(void)
322{
Rafael J. Wysockiaf926182016-02-05 03:16:08 +0100323 return cpufreq_register_governor(CPU_FREQ_GOV_CONSERVATIVE);
Dave Jonesb9170832005-05-31 19:03:47 -0700324}
325
326static void __exit cpufreq_gov_dbs_exit(void)
327{
Rafael J. Wysockiaf926182016-02-05 03:16:08 +0100328 cpufreq_unregister_governor(CPU_FREQ_GOV_CONSERVATIVE);
Dave Jonesb9170832005-05-31 19:03:47 -0700329}
330
Alexander Clouter11a80a9c762009-02-13 19:01:01 +0000331MODULE_AUTHOR("Alexander Clouter <alex@digriz.org.uk>");
Dave Jones9acef482009-01-18 01:39:51 -0500332MODULE_DESCRIPTION("'cpufreq_conservative' - A dynamic cpufreq governor for "
Dave Jonesb9170832005-05-31 19:03:47 -0700333 "Low Latency Frequency Transition capable processors "
334 "optimised for use in a battery environment");
Dave Jones9acef482009-01-18 01:39:51 -0500335MODULE_LICENSE("GPL");
Dave Jonesb9170832005-05-31 19:03:47 -0700336
Johannes Weiner69157192008-01-17 15:21:08 -0800337#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE
Rafael J. Wysockide1df262016-02-05 02:37:42 +0100338struct cpufreq_governor *cpufreq_default_governor(void)
339{
Rafael J. Wysockiaf926182016-02-05 03:16:08 +0100340 return CPU_FREQ_GOV_CONSERVATIVE;
Rafael J. Wysockide1df262016-02-05 02:37:42 +0100341}
342
Johannes Weiner69157192008-01-17 15:21:08 -0800343fs_initcall(cpufreq_gov_dbs_init);
344#else
Dave Jonesb9170832005-05-31 19:03:47 -0700345module_init(cpufreq_gov_dbs_init);
Johannes Weiner69157192008-01-17 15:21:08 -0800346#endif
Dave Jonesb9170832005-05-31 19:03:47 -0700347module_exit(cpufreq_gov_dbs_exit);