regulator: Add generic DT parsing for regulators

Looking up init data for regulators found on chips is a common operation
that can be handled in a generic way. The new helper function introduced
by this patch looks up the children of a given node by names specified
in a match table and fills that match table with information parsed from
the DT.

This is based on work by Rhyland Klein <rklein@nvidia.com>.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/include/linux/regulator/of_regulator.h b/include/linux/regulator/of_regulator.h
index 769704f296e5..f9217965aaa3 100644
--- a/include/linux/regulator/of_regulator.h
+++ b/include/linux/regulator/of_regulator.h
@@ -6,10 +6,20 @@
 #ifndef __LINUX_OF_REG_H
 #define __LINUX_OF_REG_H
 
+struct of_regulator_match {
+        const char *name;
+        void *driver_data;
+        struct regulator_init_data *init_data;
+        struct device_node *of_node;
+};
+
 #if defined(CONFIG_OF)
 extern struct regulator_init_data
         *of_get_regulator_init_data(struct device *dev,
                                     struct device_node *node);
+extern int of_regulator_match(struct device *dev, struct device_node *node,
+                              struct of_regulator_match *matches,
+                              unsigned int num_matches);
 #else
 static inline struct regulator_init_data
         *of_get_regulator_init_data(struct device *dev,
@@ -17,6 +27,14 @@ static inline struct regulator_init_data
 {
         return NULL;
 }
+
+static inline int of_regulator_match(struct device *dev,
+                                     struct device_node *node,
+                                     struct of_regulator_match *matches,
+                                     unsigned int num_matches)
+{
+        return 0;
+}
 #endif /* CONFIG_OF */
 
 #endif /* __LINUX_OF_REG_H */