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PM / OPP: Rename dev_pm_opp_get_suspend_opp() and return OPP rate

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There is only one user of dev_pm_opp_get_suspend_opp() and that uses it
to get the OPP rate for the suspend_opp.

Rename dev_pm_opp_get_suspend_opp() as dev_pm_opp_get_suspend_opp_freq()
and return the rate directly from it.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar 2017-01-02 14:41:02 +05:30 committed by Rafael J. Wysocki
parent 8cd2f6e8f3
commit 3aa26a3b2e
3 changed files with 17 additions and 23 deletions
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27
drivers/base/power/opp/core.c
View File

@ -328,32 +328,31 @@ unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev)
EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_transition_latency);
/**
* dev_pm_opp_get_suspend_opp() - Get suspend opp
* dev_pm_opp_get_suspend_opp_freq() - Get frequency of suspend opp in Hz
* @dev: device for which we do this operation
*
* Return: This function returns pointer to the suspend opp if it is
* defined and available, otherwise it returns NULL.
*
* Locking: This function must be called under rcu_read_lock(). opp is a rcu
* protected pointer. The reason for the same is that the opp pointer which is
* returned will remain valid for use with opp_get_{voltage, freq} only while
* under the locked area. The pointer returned must be used prior to unlocking
* with rcu_read_unlock() to maintain the integrity of the pointer.
* Return: This function returns the frequency of the OPP marked as suspend_opp
* if one is available, else returns 0;
*/
struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev)
unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev)
{
struct opp_table *opp_table;
unsigned long freq = 0;
opp_rcu_lockdep_assert();
rcu_read_lock();
opp_table = _find_opp_table(dev);
if (IS_ERR(opp_table) || !opp_table->suspend_opp ||
!opp_table->suspend_opp->available)
return NULL;
goto unlock;
return opp_table->suspend_opp;
freq = dev_pm_opp_get_freq(opp_table->suspend_opp);
unlock:
rcu_read_unlock();
return freq;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_get_suspend_opp);
EXPORT_SYMBOL_GPL(dev_pm_opp_get_suspend_opp_freq);
/**
* dev_pm_opp_get_opp_count() - Get number of opps available in the opp table

7
drivers/cpufreq/cpufreq-dt.c
View File

@ -148,7 +148,6 @@ static int cpufreq_init(struct cpufreq_policy *policy)
struct private_data *priv;
struct device *cpu_dev;
struct clk *cpu_clk;
struct dev_pm_opp *suspend_opp;
unsigned int transition_latency;
bool fallback = false;
const char *name;
@ -252,11 +251,7 @@ static int cpufreq_init(struct cpufreq_policy *policy)
policy->driver_data = priv;
policy->clk = cpu_clk;
rcu_read_lock();
suspend_opp = dev_pm_opp_get_suspend_opp(cpu_dev);
if (suspend_opp)
policy->suspend_freq = dev_pm_opp_get_freq(suspend_opp) / 1000;
rcu_read_unlock();
policy->suspend_freq = dev_pm_opp_get_suspend_opp_freq(cpu_dev) / 1000;
ret = cpufreq_table_validate_and_show(policy, freq_table);
if (ret) {

6
include/linux/pm_opp.h
View File

@ -88,7 +88,7 @@ int dev_pm_opp_get_opp_count(struct device *dev);
unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev);
unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev);
unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev);
struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev);
unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev);
struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
unsigned long freq,
@ -159,9 +159,9 @@ static inline unsigned long dev_pm_opp_get_max_transition_latency(struct device
return 0;
}
static inline struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev)
static inline unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev)
{
return NULL;
return 0;
}
static inline struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,