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Commit 184345129c53e76069c209f9912ed7c457eceb31

Authored by Viresh Kumar
Committed by Rafael J. Wysocki
1 parent be49e3465f
Exists in smarc-imx_3.14.28_1.0.0_ga and in 1 other branch imx_3.14.28_1.0.0_ga

cpufreq: define generic .attr, .exit() and .verify() routines 

Most of the CPUFreq drivers do similar things in .exit() and .verify() routines
and .attr. So its better if we have generic routines for them which can be used
by cpufreq drivers then.

This patch introduces generic .attr, .exit() and .verify() cpufreq drivers.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Showing 2 changed files with 28 additions and 0 deletions Side-by-side Diff

drivers/cpufreq/freq_table.c
Diff comments   View file @ 1843451
... ... @@ -86,7 +86,21 @@
86 86 }
87 87 EXPORT_SYMBOL_GPL(cpufreq_frequency_table_verify);
88 88  
  89 +/*
  90 + * Generic routine to verify policy & frequency table, requires driver to call
  91 + * cpufreq_frequency_table_get_attr() prior to it.
  92 + */
  93 +int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy)
  94 +{
  95 + struct cpufreq_frequency_table *table =
  96 + cpufreq_frequency_get_table(policy->cpu);
  97 + if (!table)
  98 + return -ENODEV;
89 99  
  100 + return cpufreq_frequency_table_verify(policy, table);
  101 +}
  102 +EXPORT_SYMBOL_GPL(cpufreq_generic_frequency_table_verify);
  103 +
90 104 int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
91 105 struct cpufreq_frequency_table *table,
92 106 unsigned int target_freq,
... ... @@ -198,6 +212,12 @@
198 212 .show = show_available_freqs,
199 213 };
200 214 EXPORT_SYMBOL_GPL(cpufreq_freq_attr_scaling_available_freqs);
  215 +
  216 +struct freq_attr *cpufreq_generic_attr[] = {
  217 + &cpufreq_freq_attr_scaling_available_freqs,
  218 + NULL,
  219 +};
  220 +EXPORT_SYMBOL_GPL(cpufreq_generic_attr);
201 221  
202 222 /*
203 223 * if you use these, you must assure that the frequency table is valid
include/linux/cpufreq.h
Diff comments   View file @ 1843451
... ... @@ -401,6 +401,7 @@
401 401  
402 402 int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
403 403 struct cpufreq_frequency_table *table);
  404 +int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy);
404 405  
405 406 int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
406 407 struct cpufreq_frequency_table *table,
407 408  
... ... @@ -416,11 +417,18 @@
416 417  
417 418 /* the following are really really optional */
418 419 extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs;
  420 +extern struct freq_attr *cpufreq_generic_attr[];
419 421 void cpufreq_frequency_table_get_attr(struct cpufreq_frequency_table *table,
420 422 unsigned int cpu);
421 423 void cpufreq_frequency_table_put_attr(unsigned int cpu);
422 424 int cpufreq_table_validate_and_show(struct cpufreq_policy *policy,
423 425 struct cpufreq_frequency_table *table);
  426 +
  427 +static inline int cpufreq_generic_exit(struct cpufreq_policy *policy)
  428 +{
  429 + cpufreq_frequency_table_put_attr(policy->cpu);
  430 + return 0;
  431 +}
424 432  
425 433 #endif /* _LINUX_CPUFREQ_H */