Add API to match the chip regulator's id by the
property of "regulator-compatible" on regulator node.
Signed-off-by: Laxman Dewangan <ldewangan@xxxxxxxxxx>
---
drivers/regulator/of_regulator.c | 61 ++++++++++++++++++++++++++++++++
include/linux/regulator/of_regulator.h | 13 +++++++
2 files changed, 74 insertions(+), 0 deletions(-)
diff --git a/drivers/regulator/of_regulator.c b/drivers/regulator/of_regulator.c
index e2a7310..3dc9be1 100644
--- a/drivers/regulator/of_regulator.c
+++ b/drivers/regulator/of_regulator.c
@@ -136,3 +136,64 @@ int of_regulator_match(struct device *dev, struct device_node *node,
return count;
}
EXPORT_SYMBOL_GPL(of_regulator_match);
+
+/**
+ * of_regulator_match_by_compatible - extract regulator init data when
+ * regulator-compatible matches.
+ * @dev: device requesting the data
+ * @node: parent device node of the regulators
+ * @matches: match table for the regulators
+ * @num_matches: number of entries in match table
+ *
+ * This function uses a match table specified by the regulator
+ * driver and looks up the corresponding init data in the device
+ * tree if regulator-compatible matches. Note that the match
+ * table is modified in place.
+ *
+ * Returns the number of matches found or a negative error code on failure.
+ */
+int of_regulator_match_by_compatible(struct device *dev,
+ struct device_node *node,
+ struct of_regulator_match *matches,
+ unsigned int num_matches)
+{
+ unsigned int count = 0;
+ unsigned int i;
+ const char *regulator_comp;
+ struct device_node *child;
+
+ if (!dev || !node)
+ return -EINVAL;
+
+ for_each_child_of_node(node, child) {
+ regulator_comp = of_get_property(child,
+ "regulator-compatible", NULL);
+ if (!regulator_comp) {
+ dev_err(dev, "regulator-compatible is missing for node %s\n",
+ child->name);
+ continue;
+ }
+ for (i = 0; i < num_matches; i++) {
+ struct of_regulator_match *match = &matches[i];
+ if (match->of_node)
+ continue;
+
+ if (strcmp(match->name, regulator_comp))
+ continue;
+
+ match->init_data =
+ of_get_regulator_init_data(dev, child);
+ if (!match->init_data) {
+ dev_err(dev,
+ "failed to parse DT for regulator %s\n",
+ child->name);
+ return -EINVAL;
+ }
+ match->of_node = child;
+ count++;
+ }
+ }
+
+ return count;
+}
+EXPORT_SYMBOL_GPL(of_regulator_match_by_compatible);
diff --git a/include/linux/regulator/of_regulator.h b/include/linux/regulator/of_regulator.h
index f921796..e3469a0 100644
--- a/include/linux/regulator/of_regulator.h
+++ b/include/linux/regulator/of_regulator.h
@@ -20,6 +20,11 @@ extern struct regulator_init_data
extern int of_regulator_match(struct device *dev, struct device_node *node,
struct of_regulator_match *matches,
unsigned int num_matches);
+extern int of_regulator_match_by_compatible(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,
@@ -35,6 +40,14 @@ static inline int of_regulator_match(struct device *dev,
{
return 0;
}
+
+static inline int of_regulator_match_by_compatible(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 */
--
1.7.1.1
--
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