linux-kernel - [PATCH v3 1/3] mfd: syscon: Add fwnode_to

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Message-Id: <9953bb25281397553cb87b09d641c968d8432dd9.1582709320.git.eswara.kota@linux.intel.com>
Date:   Wed, 26 Feb 2020 18:09:51 +0800
From:   Dilip Kota <eswara.kota@...ux.intel.com>
To:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Cc:     kishon@...com, robh@...nel.org, andriy.shevchenko@...el.com,
        cheol.yong.kim@...el.com, chuanhua.lei@...ux.intel.com,
        qi-ming.wu@...el.com, yixin.zhu@...el.com,
        Dilip Kota <eswara.kota@...ux.intel.com>
Subject: [PATCH v3 1/3] mfd: syscon: Add fwnode_to_regmap

Traverse regmap handle entry from firmware node handle.

Signed-off-by: Dilip Kota <eswara.kota@...ux.intel.com>
---
 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