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| author |   Ionela Voinescu <ionela.voinescu@arm.com> | 2020-03-05 09:06:25 +0000 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2020-03-06 16:02:50 +0000 |
| commit | bbce8eaa603236bf958b0d24e6377b3f3b623991 (patch) | |
| tree | 496e87419e608317e2ac43a45ca53b66dbcdebc1 /include/linux/cpufreq.h | |
| parent | Documentation: arm64: document support for the AMU extension (diff) | |
| download | wireguard-linux-bbce8eaa603236bf958b0d24e6377b3f3b623991.tar.xz wireguard-linux-bbce8eaa603236bf958b0d24e6377b3f3b623991.zip | |
cpufreq: add function to get the hardware max frequency
Add weak function to return the hardware maximum frequency of a CPU,
with the default implementation returning cpuinfo.max_freq, which is
the best information we can generically get from the cpufreq framework.
The default can be overwritten by a strong function in platforms
that want to provide an alternative implementation, with more accurate
information, obtained either from hardware or firmware.
Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'include/linux/cpufreq.h')
| -rw-r--r-- | include/linux/cpufreq.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 0fb561d1b524..f7240251a949 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -205,6 +205,7 @@ static inline bool policy_is_shared(struct cpufreq_policy *policy) unsigned int cpufreq_get(unsigned int cpu); unsigned int cpufreq_quick_get(unsigned int cpu); unsigned int cpufreq_quick_get_max(unsigned int cpu); +unsigned int cpufreq_get_hw_max_freq(unsigned int cpu); void disable_cpufreq(void); u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy); @@ -232,6 +233,10 @@ static inline unsigned int cpufreq_quick_get_max(unsigned int cpu) { return 0; } +static inline unsigned int cpufreq_get_hw_max_freq(unsigned int cpu) +{ + return 0; +} static inline void disable_cpufreq(void) { } #endif |