diff options
| -rw-r--r-- | Documentation/cpu-freq/cpu-drivers.txt | 19 | ||||
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 11 | ||||
| -rw-r--r-- | include/linux/cpufreq.h | 21 |
3 files changed, 51 insertions, 0 deletions
diff --git a/Documentation/cpu-freq/cpu-drivers.txt b/Documentation/cpu-freq/cpu-drivers.txt index 8b1a4451422e..d3cb4d3d9bb2 100644 --- a/Documentation/cpu-freq/cpu-drivers.txt +++ b/Documentation/cpu-freq/cpu-drivers.txt @@ -222,3 +222,22 @@ is the corresponding frequency table helper for the ->target stage. Just pass the values to this function, and the unsigned int index returns the number of the frequency table entry which contains the frequency the CPU shall be set to. + +The following macros can be used as iterators over cpufreq_frequency_table: + +cpufreq_for_each_entry(pos, table) - iterates over all entries of frequency +table. + +cpufreq-for_each_valid_entry(pos, table) - iterates over all entries, +excluding CPUFREQ_ENTRY_INVALID frequencies. +Use arguments "pos" - a cpufreq_frequency_table * as a loop cursor and +"table" - the cpufreq_frequency_table * you want to iterate over. + +For example: + + struct cpufreq_frequency_table *pos, *driver_freq_table; + + cpufreq_for_each_entry(pos, driver_freq_table) { + /* Do something with pos */ + pos->frequency = ... + } diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index b4cd3430a493..b0d455d48dd4 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -230,6 +230,17 @@ void cpufreq_cpu_put(struct cpufreq_policy *policy) } EXPORT_SYMBOL_GPL(cpufreq_cpu_put); +bool cpufreq_next_valid(struct cpufreq_frequency_table **pos) +{ + while ((*pos)->frequency != CPUFREQ_TABLE_END) + if ((*pos)->frequency != CPUFREQ_ENTRY_INVALID) + return true; + else + (*pos)++; + return false; +} +EXPORT_SYMBOL_GPL(cpufreq_next_valid); + /********************************************************************* * EXTERNALLY AFFECTING FREQUENCY CHANGES * *********************************************************************/ diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 945313ca4bbf..e8d7b6b7e3b7 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -446,6 +446,27 @@ struct cpufreq_frequency_table { * order */ }; +bool cpufreq_next_valid(struct cpufreq_frequency_table **pos); + +/* + * cpufreq_for_each_entry - iterate over a cpufreq_frequency_table + * @pos: the cpufreq_frequency_table * to use as a loop cursor. + * @table: the cpufreq_frequency_table * to iterate over. + */ + +#define cpufreq_for_each_entry(pos, table) \ + for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) + +/* + * cpufreq_for_each_valid_entry - iterate over a cpufreq_frequency_table + * excluding CPUFREQ_ENTRY_INVALID frequencies. + * @pos: the cpufreq_frequency_table * to use as a loop cursor. + * @table: the cpufreq_frequency_table * to iterate over. + */ + +#define cpufreq_for_each_valid_entry(pos, table) \ + for (pos = table; cpufreq_next_valid(&pos); pos++) + int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, struct cpufreq_frequency_table *table); |