diff options
| author | Dominik Brodowski <linux@brodo.de> | 2003-01-09 22:01:31 -0800 |
|---|---|---|
| committer | Kai Germaschewski <kai@tp1.ruhr-uni-bochum.de> | 2003-01-09 22:01:31 -0800 |
| commit | 1013687edc383b0f2912b0b5bc87331dd22a24e5 (patch) | |
| tree | d2af974a4dda1ffbe0d21862d1d628ba80cf0627 /include/linux | |
| parent | c78874ac38946f419af6eee2d72c2c3d0cc00c26 (diff) | |
[PATCH] cpufreq: frequency table helpers
This patch adds "frequency table helpers" to kernel/cpufreq.c and
updates some drivers to use them.
Most CPU frequency scaling methods only support a few static
frequencies. In these drivers a lot of duplicated code existed in the
->setpolicy and ->verify calls.
Please note that this in no way changes the behaviour of cpufreq or of
the ->setpolicy or ->verify calls. These "frequency table helpers"
aren't for drivers which either only support policies (longrun) or
really many frequency states (ARM, gx-suspmod).
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/cpufreq.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index ab2890b619d0..0e008ba3618c 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -241,4 +241,27 @@ enum { #endif /* CONFIG_CPU_FREQ_24_API */ +/********************************************************************* + * FREQUENCY TABLE HELPERS * + *********************************************************************/ + +#define CPUFREQ_ENTRY_INVALID ~0 +#define CPUFREQ_TABLE_END ~1 + +struct cpufreq_frequency_table { + unsigned int index; /* any */ + unsigned int frequency; /* kHz - doesn't need to be in ascending + * order */ +}; + +int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, + struct cpufreq_frequency_table *table); + +int cpufreq_frequency_table_verify(struct cpufreq_policy *policy, + struct cpufreq_frequency_table *table); + +int cpufreq_frequency_table_setpolicy(struct cpufreq_policy *policy, + struct cpufreq_frequency_table *table, + unsigned int *index); + #endif /* _LINUX_CPUFREQ_H */ |