[PATCH v5 1/4] mfd: syscon: Add fwnode_to_regmap

Dilip Kota
2020-03-25T09:00:13Z

Traverse regmap handle entry from firmware node handle.

Signed-off-by: Dilip Kota <eswara.kota@linux.intel.com>
---
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 e22197c832e8..08064ffc5394 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 112dc66262cc..a024dd88bdd4 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(
@@ -29,6 +30,11 @@ 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