[PATCH v2 13/48] opp: Add resource-managed versions of OPP API functions

[Dmitry Osipenko]

Add resource-managed versions of OPP API functions. This removes a need
from drivers to store and manage OPP table pointers.

Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
---
 drivers/opp/core.c     | 173 +++++++++++++++++++++++++++++++++++++++++
 drivers/opp/of.c       |  25 ++++++
 include/linux/pm_opp.h |  51 ++++++++++++
 3 files changed, 249 insertions(+)

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 4774701ec82d..d9feb7639598 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -2664,3 +2664,176 @@ int dev_pm_opp_set_voltage(struct device *dev, struct dev_pm_opp *opp)
 	return ret;
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_set_voltage);
+
+/**
+ * devm_pm_opp_get_opp_table() - Get OPP table of a device
+ * @dev:	device for which we do this operation
+ *
+ * This is a resource-managed version of dev_pm_opp_get_opp_table().
+ *
+ * Return: pointer to 'struct opp_table' if found and -ENODEV otherwise.
+ */
+struct opp_table *devm_pm_opp_get_opp_table(struct device *dev)
+{
+	struct opp_table *opp_table;
+	int err;
+
+	opp_table = dev_pm_opp_get_opp_table(dev);
+	if (IS_ERR(opp_table))
+		return opp_table;
+
+	err = devm_add_action_or_reset(dev, (void *)dev_pm_opp_put_opp_table,
+				       opp_table);
+	if (err)
+		return ERR_PTR(err);
+
+	return opp_table;
+}
+EXPORT_SYMBOL_GPL(devm_pm_opp_get_opp_table);
+
+/**
+ * devm_pm_opp_set_regulators() - Set regulator names for the device
+ * @dev: Device for which regulator name is being set.
+ * @names: Array of pointers to the names of the regulator.
+ * @count: Number of regulators.
+ *
+ * This is a resource-managed version of dev_pm_opp_set_regulators().
+ *
+ * Return: pointer to 'struct opp_table' on success and errorno otherwise.
+ */
+struct opp_table *
+devm_pm_opp_set_regulators(struct device *dev, const char * const names[],
+			   unsigned int count)
+{
+	struct opp_table *opp_table;
+	int err;
+
+	opp_table = dev_pm_opp_set_regulators(dev, names, count);
+	if (IS_ERR(opp_table))
+		return opp_table;
+
+	err = devm_add_action_or_reset(dev, (void *)dev_pm_opp_put_regulators,
+				       opp_table);
+	if (err)
+		return ERR_PTR(err);
+
+	return opp_table;
+}
+EXPORT_SYMBOL_GPL(devm_pm_opp_set_regulators);
+
+/**
+ * devm_pm_opp_set_supported_hw() - Set supported platforms
+ * @dev: Device for which supported-hw has to be set.
+ * @versions: Array of hierarchy of versions to match.
+ * @count: Number of elements in the array.
+ *
+ * This is a resource-managed version of dev_pm_opp_set_supported_hw().
+ *
+ * Return: pointer to 'struct opp_table' on success and errorno otherwise.
+ */
+struct opp_table *
+devm_pm_opp_set_supported_hw(struct device *dev, const u32 *versions,
+			     unsigned int count)
+{
+	struct opp_table *opp_table;
+	int err;
+
+	opp_table = dev_pm_opp_set_supported_hw(dev, versions, count);
+	if (IS_ERR(opp_table))
+		return opp_table;
+
+	err = devm_add_action_or_reset(dev, (void *)dev_pm_opp_put_supported_hw,
+				       opp_table);
+	if (err)
+		return ERR_PTR(err);
+
+	return opp_table;
+}
+EXPORT_SYMBOL_GPL(devm_pm_opp_set_supported_hw);
+
+/**
+ * devm_pm_opp_set_clkname() - Set clk name for the device
+ * @dev: Device for which clk name is being set.
+ * @name: Clk name.
+ *
+ * This is a resource-managed version of dev_pm_opp_set_clkname().
+ *
+ * Return: pointer to 'struct opp_table' on success and errorno otherwise.
+ */
+struct opp_table *
+devm_pm_opp_set_clkname(struct device *dev, const char *name)
+{
+	struct opp_table *opp_table;
+	int err;
+
+	opp_table = dev_pm_opp_set_clkname(dev, name);
+	if (IS_ERR(opp_table))
+		return opp_table;
+
+	err = devm_add_action_or_reset(dev, (void *)dev_pm_opp_put_clkname,
+				       opp_table);
+	if (err)
+		return ERR_PTR(err);
+
+	return opp_table;
+}
+EXPORT_SYMBOL_GPL(devm_pm_opp_set_clkname);
+
+/**
+ * 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, (void *)dev_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);
+
+/**
+ * devm_pm_opp_attach_genpd - Attach genpd(s) for the device and save virtual device pointer
+ * @dev: Consumer device for which the genpd is getting attached.
+ * @names: Null terminated array of pointers containing names of genpd to attach.
+ * @virt_devs: Pointer to return the array of virtual devices.
+ *
+ * This is a resource-managed version of dev_pm_opp_attach_genpd().
+ *
+ * Return: pointer to 'struct opp_table' on success and errorno otherwise.
+ */
+struct opp_table *
+devm_pm_opp_attach_genpd(struct device *dev, const char **names,
+			 struct device ***virt_devs)
+{
+	struct opp_table *opp_table;
+	int err;
+
+	opp_table = dev_pm_opp_attach_genpd(dev, names, virt_devs);
+	if (IS_ERR(opp_table))
+		return opp_table;
+
+	err = devm_add_action_or_reset(dev, (void *)dev_pm_opp_detach_genpd,
+				       opp_table);
+	if (err)
+		return ERR_PTR(err);
+
+	return opp_table;
+}
+EXPORT_SYMBOL_GPL(devm_pm_opp_attach_genpd);
diff --git a/drivers/opp/of.c b/drivers/opp/of.c
index 03cb387236c4..3b5a4c8bc62f 100644
--- a/drivers/opp/of.c
+++ b/drivers/opp/of.c
@@ -1350,3 +1350,28 @@ int dev_pm_opp_of_register_em(struct device *dev, struct cpumask *cpus)
 	return ret;
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_of_register_em);
+
+/**
+ * devm_pm_opp_of_add_table() - Initialize opp table from device tree
+ * @dev:	device pointer used to lookup OPP table.
+ *
+ * This is a resource-managed version of dev_pm_opp_of_add_table().
+ *
+ * Return: 0 on success and errorno otherwise.
+ */
+int devm_pm_opp_of_add_table(struct device *dev)
+{
+	int err;
+
+	err = dev_pm_opp_of_add_table(dev);
+	if (err)
+		return err;
+
+	err = devm_add_action_or_reset(dev, (void *)dev_pm_opp_remove_table,
+				       dev);
+	if (err)
+		return err;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(devm_pm_opp_of_add_table);
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 0298b426fba3..0d42fbda0134 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -163,6 +163,12 @@ 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_get_opp_table(struct device *dev);
+struct opp_table *devm_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count);
+struct opp_table *devm_pm_opp_set_supported_hw(struct device *dev, const u32 *versions, unsigned int count);
+struct opp_table *devm_pm_opp_set_clkname(struct device *dev, const char *name);
+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 *devm_pm_opp_attach_genpd(struct device *dev, const char **names, struct device ***virt_devs);
 #else
 static inline struct opp_table *dev_pm_opp_get_opp_table(struct device *dev)
 {
@@ -396,9 +402,49 @@ 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_get_opp_table(struct device *dev)
+{
+	return ERR_PTR(-ENOTSUPP);
+}
+
+static inline struct opp_table *
+devm_pm_opp_set_regulators(struct device *dev, const char * const names[],
+			   unsigned int count)
+{
+	return ERR_PTR(-ENOTSUPP);
+}
+
+static inline struct opp_table *
+devm_pm_opp_set_supported_hw(struct device *dev, const u32 *versions,
+			     unsigned int count)
+{
+	return ERR_PTR(-ENOTSUPP);
+}
+
+static inline struct opp_table *
+devm_pm_opp_set_clkname(struct device *dev, const char *name)
+{
+	return ERR_PTR(-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);
+}
+
+static inline struct opp_table *
+devm_pm_opp_attach_genpd(struct device *dev, const char **names,
+			 struct device ***virt_devs)
+{
+	return ERR_PTR(-ENOTSUPP);
+}
+
 #endif		/* CONFIG_PM_OPP */
 
 #if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
+int devm_pm_opp_of_add_table(struct device *dev);
 int dev_pm_opp_of_add_table(struct device *dev);
 int dev_pm_opp_of_add_table_indexed(struct device *dev, int index);
 void dev_pm_opp_of_remove_table(struct device *dev);
@@ -472,6 +518,11 @@ static inline int dev_pm_opp_of_find_icc_paths(struct device *dev, struct opp_ta
 {
 	return -ENOTSUPP;
 }
+
+static inline int devm_pm_opp_of_add_table(struct device *dev)
+{
+	return -ENOTSUPP;
+}
 #endif
 
 #endif		/* __LINUX_OPP_H__ */
-- 
2.29.2