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authorViresh Kumar <viresh.kumar@linaro.org>2017-01-02 14:41:02 +0530
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-01-27 11:49:09 +0100
commit3aa26a3b2ea63c4d09420e74421370655aa1cf8f (patch)
treee1625cf9fd192fb4b10aac18b2e4fbc1ed7b1776
parent8cd2f6e8f34e75198063a6d84675b18bdb106824 (diff)
PM / OPP: Rename dev_pm_opp_get_suspend_opp() and return OPP rate
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>
-rw-r--r--drivers/base/power/opp/core.c27
-rw-r--r--drivers/cpufreq/cpufreq-dt.c7
-rw-r--r--include/linux/pm_opp.h6
3 files changed, 17 insertions, 23 deletions
diff --git a/drivers/base/power/opp/core.c b/drivers/base/power/opp/core.c
index dde7dd099aa0..614d779ab6a2 100644
--- a/drivers/base/power/opp/core.c
+++ b/drivers/base/power/opp/core.c
@@ -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
diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
index 269013311e79..c943787d761e 100644
--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c
@@ -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) {
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 0edd88f93904..7483ff291a8e 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -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,