[PATCH v6 1/4] mfd: syscon: Add fwnode_to_regmap

[Dilip Kota]

Traverse regmap handle entry from firmware node handle.

Signed-off-by: Dilip Kota <eswara.kota@xxxxxxxxxxxxxxx>
---
Changes on v5:
  No changes
  
Changes on v5:
  No changes

Changes on v4:
  No changes

 drivers/mfd/syscon.c       | 8 ++++++++
 include/linux/mfd/syscon.h | 6 ++++++
 2 files changed, 14 insertions(+)

diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c
index 3a97816d0cba..e085c50816b9 100644
--- a/drivers/mfd/syscon.c
+++ b/drivers/mfd/syscon.c
@@ -178,6 +178,14 @@ struct regmap *device_node_to_regmap(struct device_node *np)
 }
 EXPORT_SYMBOL_GPL(device_node_to_regmap);
 
+struct regmap *fwnode_to_regmap(struct fwnode_handle *fwnode)
+{
+	struct device_node *np = to_of_node(fwnode);
+
+	return device_node_get_regmap(np, false);
+}
+EXPORT_SYMBOL_GPL(fwnode_to_regmap);
+
 struct regmap *syscon_node_to_regmap(struct device_node *np)
 {
 	if (!of_device_is_compatible(np, "syscon"))
diff --git a/include/linux/mfd/syscon.h b/include/linux/mfd/syscon.h
index 7f20e9b502a5..dacab0b4a091 100644
--- a/include/linux/mfd/syscon.h
+++ b/include/linux/mfd/syscon.h
@@ -18,6 +18,7 @@ struct device_node;
 
 #ifdef CONFIG_MFD_SYSCON
 extern struct regmap *device_node_to_regmap(struct device_node *np);
+extern struct regmap *fwnode_to_regmap(struct fwnode_handle *fwnode);
 extern struct regmap *syscon_node_to_regmap(struct device_node *np);
 extern struct regmap *syscon_regmap_lookup_by_compatible(const char *s);
 extern struct regmap *syscon_regmap_lookup_by_phandle(
@@ -34,6 +35,11 @@ static inline struct regmap *device_node_to_regmap(struct device_node *np)
 	return ERR_PTR(-ENOTSUPP);
 }
 
+static inline struct regmap *fwnode_to_regmap(struct fwnode_handle *fwnode)
+{
+	return ERR_PTR(-ENOTSUPP);
+}
+
 static inline struct regmap *syscon_node_to_regmap(struct device_node *np)
 {
 	return ERR_PTR(-ENOTSUPP);
-- 
2.11.0