[PATCH v3 08/12] opp: Add devm_pm_opp_register_set_opp_helper

Dmitry Osipenko
2021-01-18T01:05:35Z

Add resource-managed version of dev_pm_opp_register_set_opp_helper().

Tested-by: Peter Geis <pgwipeout@gmail.com>
Tested-by: Nicolas Chauvet <kwizart@gmail.com>
Tested-by: Matt Merhar <mattmerhar@protonmail.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/opp/core.c | 34 ++++++++++++++++++++++++++++++++++
include/linux/pm_opp.h | 8 ++++++++
2 files changed, 42 insertions(+)

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index fde2ec00ab0e..8e0d2193fd5f 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -2857,3 +2857,37 @@ int dev_pm_opp_set_voltage(struct device *dev, struct dev_pm_opp *opp)
return ret;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_set_voltage);
+
+static void devm_pm_opp_unregister_set_opp_helper(void *data)
+{
+ dev_pm_opp_unregister_set_opp_helper(data);
+}
+
+/**
+ * devm_pm_opp_register_set_opp_helper() - Register custom set OPP helper
+ * @dev: Device for which the helper is getting registered.
+ * @set_opp: Custom set OPP helper.
+ *
+ * This is a resource-managed version of dev_pm_opp_register_set_opp_helper().
+ *
+ * Return: pointer to 'struct opp_table' on success and errorno otherwise.
+ */
+struct opp_table *
+devm_pm_opp_register_set_opp_helper(struct device *dev,
+ int (*set_opp)(struct dev_pm_set_opp_data *data))
+{
+ struct opp_table *opp_table;
+ int err;
+
+ opp_table = dev_pm_opp_register_set_opp_helper(dev, set_opp);
+ if (IS_ERR(opp_table))
+ return opp_table;
+
+ err = devm_add_action_or_reset(dev, devm_pm_opp_unregister_set_opp_helper,
+ opp_table);
+ if (err)
+ return ERR_PTR(err);
+
+ return opp_table;
+}
+EXPORT_SYMBOL_GPL(devm_pm_opp_register_set_opp_helper);
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index e072148ae0e1..6de5853aaada 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -169,6 +169,7 @@ 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);
int dev_pm_opp_set_voltage(struct device *dev, struct dev_pm_opp *opp);
+struct opp_table *devm_pm_opp_register_set_opp_helper(struct device *dev, int (*set_opp)(struct dev_pm_set_opp_data *data));
#else
static inline struct opp_table *dev_pm_opp_get_opp_table(struct device *dev)
{
@@ -428,6 +429,13 @@ static inline int dev_pm_opp_set_voltage(struct device *dev, struct dev_pm_opp *
return -ENOTSUPP;
}

+static inline struct opp_table *
+devm_pm_opp_register_set_opp_helper(struct device *dev,
+ int (*set_opp)(struct dev_pm_set_opp_data *data))
+{
+ return ERR_PTR(-ENOTSUPP);
+}
+
#endif /* CONFIG_PM_OPP */

#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
--
2.29.2