Extend OPP API with dev_pm_opp_sync_regulators() function, which syncs
voltage state of regulators.
Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
---
drivers/opp/core.c | 42 ++++++++++++++++++++++++++++++++++++++++++
include/linux/pm_opp.h | 11 +++++++++++
2 files changed, 53 insertions(+)
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 4268eb359915..500d6c716283 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -2499,3 +2499,45 @@ void dev_pm_opp_remove_table(struct device *dev)
dev_pm_opp_put_opp_table(opp_table);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_remove_table);
+
+/**
+ * dev_pm_opp_sync_regulators() - Sync state of voltage regulators
+ * @dev: device for which we do this operation
+ *
+ * Sync voltage state of the OPP table regulators.
+ *
+ * Return: 0 on success or a negative error value.
+ */
+int dev_pm_opp_sync_regulators(struct device *dev)
+{
+ struct opp_table *opp_table;
+ struct regulator *reg;
+ int i, ret = 0;
+
+ /* Device may not have OPP table */
+ opp_table = _find_opp_table(dev);
+ if (IS_ERR(opp_table))
+ return 0;
+
+ /* Regulator may not be required for the device */
+ if (!opp_table->regulators)
+ goto put_table;
+
+ /* Nothing to sync if voltage wasn't changed */
+ if (!opp_table->enabled)
+ goto put_table;
+
+ for (i = 0; i < opp_table->regulator_count; i++) {
+ reg = opp_table->regulators[i];
+ ret = regulator_sync_voltage(reg);
+ if (ret)
+ break;
+ }
+
+put_table:
+ /* Drop reference taken by _find_opp_table() */
+ dev_pm_opp_put_opp_table(opp_table);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_sync_regulators);
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 1435c054016a..4c79faa2025e 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -156,6 +156,7 @@ int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cp
int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
void dev_pm_opp_remove_table(struct device *dev);
void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask);
+int dev_pm_opp_sync_regulators(struct device *dev);
#else
static inline struct opp_table *dev_pm_opp_get_opp_table(struct device *dev)
{
@@ -366,6 +367,11 @@ static inline void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask
{
}
+static inline int dev_pm_opp_sync_regulators(struct device *dev)
+{
+ return -ENOTSUPP;
+}
+
#endif /* CONFIG_PM_OPP */
#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
@@ -442,6 +448,11 @@ static inline int dev_pm_opp_of_find_icc_paths(struct device *dev, struct opp_ta
{
return -ENOTSUPP;
}
+
+static inline int dev_pm_opp_sync_regulators(struct device *dev)
+{
+ return -ENOTSUPP;
+}
#endif
#endif /* __LINUX_OPP_H__ */
--
2.29.2
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