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From:   Charles Keepax <ckeepax@opensource.cirrus.com>
To:     <broonie@kernel.org>
CC:     <lgirdwood@gmail.com>, <linux-kernel@vger.kernel.org>,
        <patches@opensource.cirrus.com>
Subject: [PATCH 1/2] regulator: Factor out location of init data OF node
Date:   Thu, 29 Nov 2018 10:28:20 +0000
Message-ID: <20181129102821.18396-2-ckeepax@opensource.cirrus.com>
In-Reply-To: <20181129102821.18396-1-ckeepax@opensource.cirrus.com>
References: <20181129102821.18396-1-ckeepax@opensource.cirrus.com>
MIME-Version: 1.0
Content-Type: text/plain
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

To support future additions factor out the location of the OF node
containing the init data for the regulator from the code that parses the
init data.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---
 drivers/regulator/of_regulator.c | 64 +++++++++++++++++++++++-----------------
 1 file changed, 37 insertions(+), 27 deletions(-)

diff --git a/drivers/regulator/of_regulator.c b/drivers/regulator/of_regulator.c
index c711a0a2bc4b..4bb8928bdb3f 100644
--- a/drivers/regulator/of_regulator.c
+++ b/drivers/regulator/of_regulator.c
@@ -371,13 +371,10 @@ int of_regulator_match(struct device *dev, struct device_node *node,
 }
 EXPORT_SYMBOL_GPL(of_regulator_match);
 
-struct regulator_init_data *regulator_of_get_init_data(struct device *dev,
-					    const struct regulator_desc *desc,
-					    struct regulator_config *config,
-					    struct device_node **node)
+struct device_node *regulator_of_get_init_node(struct device *dev,
+					       const struct regulator_desc *desc)
 {
 	struct device_node *search, *child;
-	struct regulator_init_data *init_data = NULL;
 	const char *name;
 
 	if (!dev->of_node || !desc->of_match)
@@ -400,35 +397,48 @@ struct regulator_init_data *regulator_of_get_init_data(struct device *dev,
 		if (!name)
 			name = child->name;
 
-		if (strcmp(desc->of_match, name))
-			continue;
+		if (!strcmp(desc->of_match, name))
+			return of_node_get(child);
+	}
 
-		init_data = of_get_regulator_init_data(dev, child, desc);
-		if (!init_data) {
-			dev_err(dev,
-				"failed to parse DT for regulator %pOFn\n",
-				child);
-			break;
-		}
+	of_node_put(search);
 
-		if (desc->of_parse_cb) {
-			if (desc->of_parse_cb(child, desc, config)) {
-				dev_err(dev,
-					"driver callback failed to parse DT for regulator %pOFn\n",
-					child);
-				init_data = NULL;
-				break;
-			}
-		}
+	return NULL;
+}
 
-		of_node_get(child);
-		*node = child;
-		break;
+struct regulator_init_data *regulator_of_get_init_data(struct device *dev,
+					    const struct regulator_desc *desc,
+					    struct regulator_config *config,
+					    struct device_node **node)
+{
+	struct device_node *child;
+	struct regulator_init_data *init_data = NULL;
+
+	child = regulator_of_get_init_node(dev, desc);
+	if (!child)
+		return NULL;
+
+	init_data = of_get_regulator_init_data(dev, child, desc);
+	if (!init_data) {
+		dev_err(dev, "failed to parse DT for regulator %pOFn\n", child);
+		goto error;
 	}
 
-	of_node_put(search);
+	if (desc->of_parse_cb && desc->of_parse_cb(child, desc, config)) {
+		dev_err(dev,
+			"driver callback failed to parse DT for regulator %pOFn\n",
+			child);
+		goto error;
+	}
+
+	*node = child;
 
 	return init_data;
+
+error:
+	of_node_put(child);
+
+	return NULL;
 }
 
 static int of_node_match(struct device *dev, const void *data)
-- 
2.11.0