[PATCH 04/31] opp: Add devres wrapper for dev_pm_opp_of_add_table

[Yangtao Li]

Add devres wrapper for dev_pm_opp_of_add_table() to simplify driver
code.

Signed-off-by: Yangtao Li <tiny.win...@gmail.com>
---
 drivers/opp/of.c       | 36 ++++++++++++++++++++++++++++++++++++
 include/linux/pm_opp.h |  6 ++++++
 2 files changed, 42 insertions(+)

diff --git a/drivers/opp/of.c b/drivers/opp/of.c
index 03cb387236c4..50df483c7dc3 100644
--- a/drivers/opp/of.c
+++ b/drivers/opp/of.c
@@ -998,6 +998,42 @@ int dev_pm_opp_of_add_table(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_of_add_table);
 
+static void devm_pm_opp_of_table_release(void *data)
+{
+       dev_pm_opp_of_remove_table(data);
+}
+
+/**
+ * devm_pm_opp_of_add_table() - Initialize opp table from device tree
+ * @dev:       device pointer used to lookup OPP table.
+ *
+ * Register the initial OPP table with the OPP library for given device.
+ *
+ * The opp_table structure will be freed after the device is destroyed.
+ *
+ * Return:
+ * 0           On success OR
+ *             Duplicate OPPs (both freq and volt are same) and opp->available
+ * -EEXIST     Freq are same and volt are different OR
+ *             Duplicate OPPs (both freq and volt are same) and !opp->available
+ * -ENOMEM     Memory allocation failure
+ * -ENODEV     when 'operating-points' property is not found or is invalid data
+ *             in device node.
+ * -ENODATA    when empty 'operating-points' property is found
+ * -EINVAL     when invalid entries are found in opp-v2 table
+ */
+int devm_pm_opp_of_add_table(struct device *dev)
+{
+       int ret;
+
+       ret = dev_pm_opp_of_add_table(dev);
+       if (ret)
+               return ret;
+
+       return devm_add_action_or_reset(dev, devm_pm_opp_of_table_release, dev);
+}
+EXPORT_SYMBOL_GPL(devm_pm_opp_of_add_table);
+
 /**
  * dev_pm_opp_of_add_table_indexed() - Initialize indexed opp table from 
device tree
  * @dev:       device pointer used to lookup OPP table.
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index e5260fc82ba1..e8bdac5f9555 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -398,6 +398,7 @@ static inline void dev_pm_opp_cpumask_remove_table(const 
struct cpumask *cpumask
 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);
+int devm_pm_opp_of_add_table(struct device *dev);
 int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask);
 void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask);
 int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask 
*cpumask);
@@ -425,6 +426,11 @@ static inline void dev_pm_opp_of_remove_table(struct 
device *dev)
 {
 }
 
+static inline int devm_pm_opp_of_add_table(struct device *dev)
+{
+       return -ENOTSUPP;
+}
+
 static inline int dev_pm_opp_of_cpumask_add_table(const struct cpumask 
*cpumask)
 {
        return -ENOTSUPP;
-- 
2.25.1