This function is handy when syscon is passed as phandle to device_node
property.
Signed-off-by: Marcin Niestroj <m.niestroj@xxxxxxxxxxxxxxxx>
---
drivers/mfd/syscon.c | 19 +++++++++++++++++++
include/mfd/syscon.h | 9 +++++++++
2 files changed, 28 insertions(+)
diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c
index b1ff1b1ea..809941937 100644
--- a/drivers/mfd/syscon.c
+++ b/drivers/mfd/syscon.c
@@ -174,6 +174,25 @@ struct regmap *syscon_regmap_lookup_by_compatible(const char *s)
return regmap;
}
+struct regmap *syscon_regmap_lookup_by_phandle(struct device_node *np,
+ const char *property)
+{
+ struct device_node *syscon_np;
+ struct regmap *regmap;
+
+ if (property)
+ syscon_np = of_parse_phandle(np, property, 0);
+ else
+ syscon_np = np;
+
+ if (!syscon_np)
+ return ERR_PTR(-ENODEV);
+
+ regmap = syscon_node_to_regmap(syscon_np);
+
+ return regmap;
+}
+
static int syscon_probe(struct device_d *dev)
{
struct syscon *syscon;
diff --git a/include/mfd/syscon.h b/include/mfd/syscon.h
index 902f9fa2f..ac33f2d34 100644
--- a/include/mfd/syscon.h
+++ b/include/mfd/syscon.h
@@ -22,6 +22,9 @@ void __iomem *syscon_base_lookup_by_phandle
(struct device_node *np, const char *property);
struct regmap *syscon_node_to_regmap(struct device_node *np);
struct regmap *syscon_regmap_lookup_by_compatible(const char *s);
+extern struct regmap *syscon_regmap_lookup_by_phandle(
+ struct device_node *np,
+ const char *property);
#else
static inline void __iomem *syscon_base_lookup_by_pdevname(const char *s)
{
@@ -42,6 +45,12 @@ static inline struct regmap *syscon_regmap_lookup_by_compatible(const char *s)
{
return ERR_PTR(-ENOSYS);
}
+static inline struct regmap *syscon_regmap_lookup_by_phandle(
+ struct device_node *np,
+ const char *property)
+{
+ return ERR_PTR(-ENOSYS);
+}
#endif
#endif
--
2.21.0
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