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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2014-03-04 04:00:27 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-03-06 15:04:12 +0100 |
| commit | e28867eab7c0a60cddf0cb59f9f6cbbd9561425d (patch) | |
| tree | 1391897d0eefb9464ec762538f8f7307079192f1 /drivers/cpufreq/cpufreq.c | |
| parent | cpufreq: suspend governors on system suspend/hibernate (diff) | |
| download | linux-e28867eab7c0a60cddf0cb59f9f6cbbd9561425d.tar.xz linux-e28867eab7c0a60cddf0cb59f9f6cbbd9561425d.zip | |
cpufreq: Implement cpufreq_generic_suspend()
Multiple platforms need to set CPUs to a particular frequency before
suspending the system, so provide a common infrastructure for them.
Those platforms only need to point their ->suspend callback pointers
to the generic routine.
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
[rjw: Changelog]
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 | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 289a407a9207..61dd72b8c143 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -1567,6 +1567,32 @@ static struct subsys_interface cpufreq_interface = { .remove_dev = cpufreq_remove_dev, }; +/* + * In case platform wants some specific frequency to be configured + * during suspend.. + */ +int cpufreq_generic_suspend(struct cpufreq_policy *policy) +{ + int ret; + + if (!policy->suspend_freq) { + pr_err("%s: suspend_freq can't be zero\n", __func__); + return -EINVAL; + } + + pr_debug("%s: Setting suspend-freq: %u\n", __func__, + policy->suspend_freq); + + ret = __cpufreq_driver_target(policy, policy->suspend_freq, + CPUFREQ_RELATION_H); + if (ret) + pr_err("%s: unable to set suspend-freq: %u. err: %d\n", + __func__, policy->suspend_freq, ret); + + return ret; +} +EXPORT_SYMBOL(cpufreq_generic_suspend); + /** * cpufreq_suspend() - Suspend CPUFreq governors * |