[PATCH v4 02/11] regmap: Implement syscon_regmap_lookup_by_compatible()

[Sam Ravnborg <sam@ravnborg.org>]

From: Ahmad Fatoum <a.fatoum@pengutronix.de>

Implement syscon_regmap_lookup_by_compatible() to simplify porting kernel code.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
---
 drivers/mfd/syscon.c | 14 ++++++++++++++
 include/mfd/syscon.h |  5 +++++
 2 files changed, 19 insertions(+)

diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c
index 30ed65f73..b1ff1b1ea 100644
--- a/drivers/mfd/syscon.c
+++ b/drivers/mfd/syscon.c
@@ -160,6 +160,20 @@ struct regmap *syscon_node_to_regmap(struct device_node *np)
 	return syscon->regmap;
 }
 
+struct regmap *syscon_regmap_lookup_by_compatible(const char *s)
+{
+	struct device_node *syscon_np;
+	struct regmap *regmap;
+
+	syscon_np = of_find_compatible_node(NULL, NULL, s);
+	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 63b893e4a..902f9fa2f 100644
--- a/include/mfd/syscon.h
+++ b/include/mfd/syscon.h
@@ -21,6 +21,7 @@ void __iomem *syscon_base_lookup_by_pdevname(const char *s);
 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);
 #else
 static inline void __iomem *syscon_base_lookup_by_pdevname(const char *s)
 {
@@ -37,6 +38,10 @@ static inline struct regmap *syscon_node_to_regmap(struct device_node *np)
 {
 	return ERR_PTR(-ENOSYS);
 }
+static inline struct regmap *syscon_regmap_lookup_by_compatible(const char *s)
+{
+	return ERR_PTR(-ENOSYS);
+}
 #endif
 
 #endif
-- 
2.12.0


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