diff options
author | Viresh Kumar <viresh.kumar@linaro.org> | 2013-10-03 14:59:07 (GMT) |
---|---|---|
committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-10-15 22:50:33 (GMT) |
commit | 70e9e778337973d5bf57004092b360bd3f3c412f (patch) | |
tree | 8c8f19f60b723421764caee1926f15db36bdb35b /drivers/cpufreq/cpufreq.c | |
parent | 9909aa1e3b69eb05201bdbd2b9bde00c50c1723a (diff) | |
download | linux-70e9e778337973d5bf57004092b360bd3f3c412f.tar.xz |
cpufreq: create cpufreq_generic_init() routine
Many CPUFreq drivers for SMP system (where all cores share same clock lines), do
similar stuff in their ->init() part.
This patch creates a generic routine in cpufreq core which can be used by these
so that we can remove some redundant code.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/cpufreq.c')
-rw-r--r-- | drivers/cpufreq/cpufreq.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index f033adf..985f325 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -181,6 +181,37 @@ u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy) } EXPORT_SYMBOL_GPL(get_cpu_idle_time); +/* + * This is a generic cpufreq init() routine which can be used by cpufreq + * drivers of SMP systems. It will do following: + * - validate & show freq table passed + * - set policies transition latency + * - policy->cpus with all possible CPUs + */ +int cpufreq_generic_init(struct cpufreq_policy *policy, + struct cpufreq_frequency_table *table, + unsigned int transition_latency) +{ + int ret; + + ret = cpufreq_table_validate_and_show(policy, table); + if (ret) { + pr_err("%s: invalid frequency table: %d\n", __func__, ret); + return ret; + } + + policy->cpuinfo.transition_latency = transition_latency; + + /* + * The driver only supports the SMP configuartion where all processors + * share the clock and voltage and clock. + */ + cpumask_setall(policy->cpus); + + return 0; +} +EXPORT_SYMBOL_GPL(cpufreq_generic_init); + struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu) { struct cpufreq_policy *policy = NULL; |