aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/cpufreq/freq_table.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/cpufreq/freq_table.c')
-rw-r--r--drivers/cpufreq/freq_table.c46
1 files changed, 8 insertions, 38 deletions
diff --git a/drivers/cpufreq/freq_table.c b/drivers/cpufreq/freq_table.c
index 8e54f97899ba..65a477075b3f 100644
--- a/drivers/cpufreq/freq_table.c
+++ b/drivers/cpufreq/freq_table.c
@@ -91,8 +91,8 @@ int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
91EXPORT_SYMBOL_GPL(cpufreq_frequency_table_verify); 91EXPORT_SYMBOL_GPL(cpufreq_frequency_table_verify);
92 92
93/* 93/*
94 * Generic routine to verify policy & frequency table, requires driver to call 94 * Generic routine to verify policy & frequency table, requires driver to set
95 * cpufreq_frequency_table_get_attr() prior to it. 95 * policy->freq_table prior to it.
96 */ 96 */
97int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy) 97int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy)
98{ 98{
@@ -203,8 +203,6 @@ int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy,
203} 203}
204EXPORT_SYMBOL_GPL(cpufreq_frequency_table_get_index); 204EXPORT_SYMBOL_GPL(cpufreq_frequency_table_get_index);
205 205
206static DEFINE_PER_CPU(struct cpufreq_frequency_table *, cpufreq_show_table);
207
208/** 206/**
209 * show_available_freqs - show available frequencies for the specified CPU 207 * show_available_freqs - show available frequencies for the specified CPU
210 */ 208 */
@@ -212,15 +210,12 @@ static ssize_t show_available_freqs(struct cpufreq_policy *policy, char *buf,
212 bool show_boost) 210 bool show_boost)
213{ 211{
214 unsigned int i = 0; 212 unsigned int i = 0;
215 unsigned int cpu = policy->cpu;
216 ssize_t count = 0; 213 ssize_t count = 0;
217 struct cpufreq_frequency_table *table; 214 struct cpufreq_frequency_table *table = policy->freq_table;
218 215
219 if (!per_cpu(cpufreq_show_table, cpu)) 216 if (!table)
220 return -ENODEV; 217 return -ENODEV;
221 218
222 table = per_cpu(cpufreq_show_table, cpu);
223
224 for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) { 219 for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
225 if (table[i].frequency == CPUFREQ_ENTRY_INVALID) 220 if (table[i].frequency == CPUFREQ_ENTRY_INVALID)
226 continue; 221 continue;
@@ -283,49 +278,24 @@ struct freq_attr *cpufreq_generic_attr[] = {
283}; 278};
284EXPORT_SYMBOL_GPL(cpufreq_generic_attr); 279EXPORT_SYMBOL_GPL(cpufreq_generic_attr);
285 280
286/*
287 * if you use these, you must assure that the frequency table is valid
288 * all the time between get_attr and put_attr!
289 */
290void cpufreq_frequency_table_get_attr(struct cpufreq_frequency_table *table,
291 unsigned int cpu)
292{
293 pr_debug("setting show_table for cpu %u to %p\n", cpu, table);
294 per_cpu(cpufreq_show_table, cpu) = table;
295}
296EXPORT_SYMBOL_GPL(cpufreq_frequency_table_get_attr);
297
298void cpufreq_frequency_table_put_attr(unsigned int cpu)
299{
300 pr_debug("clearing show_table for cpu %u\n", cpu);
301 per_cpu(cpufreq_show_table, cpu) = NULL;
302}
303EXPORT_SYMBOL_GPL(cpufreq_frequency_table_put_attr);
304
305int cpufreq_table_validate_and_show(struct cpufreq_policy *policy, 281int cpufreq_table_validate_and_show(struct cpufreq_policy *policy,
306 struct cpufreq_frequency_table *table) 282 struct cpufreq_frequency_table *table)
307{ 283{
308 int ret = cpufreq_frequency_table_cpuinfo(policy, table); 284 int ret = cpufreq_frequency_table_cpuinfo(policy, table);
309 285
310 if (!ret) 286 if (!ret)
311 cpufreq_frequency_table_get_attr(table, policy->cpu); 287 policy->freq_table = table;
312 288
313 return ret; 289 return ret;
314} 290}
315EXPORT_SYMBOL_GPL(cpufreq_table_validate_and_show); 291EXPORT_SYMBOL_GPL(cpufreq_table_validate_and_show);
316 292
317void cpufreq_frequency_table_update_policy_cpu(struct cpufreq_policy *policy) 293struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu);
318{
319 pr_debug("Updating show_table for new_cpu %u from last_cpu %u\n",
320 policy->cpu, policy->last_cpu);
321 per_cpu(cpufreq_show_table, policy->cpu) = per_cpu(cpufreq_show_table,
322 policy->last_cpu);
323 per_cpu(cpufreq_show_table, policy->last_cpu) = NULL;
324}
325 294
326struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu) 295struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu)
327{ 296{
328 return per_cpu(cpufreq_show_table, cpu); 297 struct cpufreq_policy *policy = cpufreq_cpu_get_raw(cpu);
298 return policy ? policy->freq_table : NULL;
329} 299}
330EXPORT_SYMBOL_GPL(cpufreq_frequency_get_table); 300EXPORT_SYMBOL_GPL(cpufreq_frequency_get_table);
331 301