[RFC PATCH 2/3] i2c: i2c-core-of: Move children registration in a dedicated function

[Herve Codina <herve.codina@bootlin.com>]

of_i2c_register_devices() perform the loop for registering child devices.

In order to prepare the support for i2c bus extensions, extract this
registration loop and move it in a dedicated function.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
---
 drivers/i2c/i2c-core-of.c | 30 +++++++++++++++++++-----------
 1 file changed, 19 insertions(+), 11 deletions(-)

diff --git a/drivers/i2c/i2c-core-of.c b/drivers/i2c/i2c-core-of.c
index a6c407d36800..b4c9db137f5a 100644
--- a/drivers/i2c/i2c-core-of.c
+++ b/drivers/i2c/i2c-core-of.c
@@ -82,21 +82,15 @@ static struct i2c_client *of_i2c_register_device(struct i2c_adapter *adap,
 	return client;
 }
 
-void of_i2c_register_devices(struct i2c_adapter *adap)
+static void of_i2c_register_children(struct i2c_adapter *adap,
+				     struct device_node *bus)
 {
-	struct device_node *bus, *node;
 	struct i2c_client *client;
+	struct device_node *node;
 
-	/* Only register child devices if the adapter has a node pointer set */
-	if (!adap->dev.of_node)
-		return;
-
-	dev_dbg(&adap->dev, "of_i2c: walking child nodes\n");
-
-	bus = of_get_child_by_name(adap->dev.of_node, "i2c-bus");
-	if (!bus)
-		bus = of_node_get(adap->dev.of_node);
+	dev_dbg(&adap->dev, "of_i2c: walking child nodes from %pOF\n", bus);
 
+	/* Register device directly attached to this bus */
 	for_each_available_child_of_node(bus, node) {
 		if (of_node_test_and_set_flag(node, OF_POPULATED))
 			continue;
@@ -109,7 +103,21 @@ void of_i2c_register_devices(struct i2c_adapter *adap)
 			of_node_clear_flag(node, OF_POPULATED);
 		}
 	}
+}
+
+void of_i2c_register_devices(struct i2c_adapter *adap)
+{
+	struct device_node *bus;
+
+	/* Only register child devices if the adapter has a node pointer set */
+	if (!adap->dev.of_node)
+		return;
+
+	bus = of_get_child_by_name(adap->dev.of_node, "i2c-bus");
+	if (!bus)
+		bus = of_node_get(adap->dev.of_node);
 
+	of_i2c_register_children(adap, bus);
 	of_node_put(bus);
 }
 
-- 
2.47.1