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-rw-r--r--drivers/base/power/opp/core.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/base/power/opp/core.c b/drivers/base/power/opp/core.c
index ffe2406af882..b0f5c72f0fc3 100644
--- a/drivers/base/power/opp/core.c
+++ b/drivers/base/power/opp/core.c
@@ -290,6 +290,23 @@ unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_volt_latency);
/**
+ * dev_pm_opp_get_max_transition_latency() - Get max transition latency in
+ * nanoseconds
+ * @dev: device for which we do this operation
+ *
+ * Return: This function returns the max transition latency, in nanoseconds, to
+ * switch from one OPP to other.
+ *
+ * Locking: This function takes rcu_read_lock().
+ */
+unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev)
+{
+ return dev_pm_opp_get_max_volt_latency(dev) +
+ dev_pm_opp_get_max_clock_latency(dev);
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_transition_latency);
+
+/**
* dev_pm_opp_get_suspend_opp() - Get suspend opp
* @dev: device for which we do this operation
*