[2/4] of: add __of_get_next_status_child() and makes more generic of_get_next

Commit Message

Kuninori Morimoto Nov. 14, 2023, midnight UTC

Linux Kernel has of_get_next_available_child().
Add more generic __of_get_next_status_child() to enable to use same
logic for other status.

Signed-off-by: Kuninori Morimoto <[e-mail]>
Tested-by: Yusuke Goda <[e-mail]>
---
 drivers/of/base.c | 29 ++++++++++++++++++-----------
 1 file changed, 18 insertions(+), 11 deletions(-)

Patch

diff --git a/drivers/of/base.c b/drivers/of/base.c
index d67cb650dcd6..f0b63e195f66 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -608,16 +608,9 @@  struct device_node *of_get_next_child(const struct device_node *node,
 }
 EXPORT_SYMBOL(of_get_next_child);
 
-/**
- * of_get_next_available_child - Find the next available child node
- * @node:	parent node
- * @prev:	previous child of the parent node, or NULL to get first
- *
- * This function is like of_get_next_child(), except that it
- * automatically skips any disabled nodes (i.e. status = "disabled").
- */
-struct device_node *of_get_next_available_child(const struct device_node *node,
-	struct device_node *prev)
+static struct device_node *__of_get_next_status_child(const struct device_node *node,
+						      struct device_node *prev,
+						      bool (*checker)(const struct device_node *))
 {
 	struct device_node *next;
 	unsigned long flags;
@@ -628,7 +621,7 @@  struct device_node *of_get_next_available_child(const struct device_node *node,
 	raw_spin_lock_irqsave(&devtree_lock, flags);
 	next = prev ? prev->sibling : node->child;
 	for (; next; next = next->sibling) {
-		if (!__of_device_is_available(next))
+		if (!checker(next))
 			continue;
 		if (of_node_get(next))
 			break;
@@ -637,6 +630,20 @@  struct device_node *of_get_next_available_child(const struct device_node *node,
 	raw_spin_unlock_irqrestore(&devtree_lock, flags);
 	return next;
 }
+
+/**
+ * of_get_next_available_child - Find the next available child node
+ * @node:	parent node
+ * @prev:	previous child of the parent node, or NULL to get first
+ *
+ * This function is like of_get_next_child(), except that it
+ * automatically skips any disabled nodes (i.e. status = "disabled").
+ */
+struct device_node *of_get_next_available_child(const struct device_node *node,
+	struct device_node *prev)
+{
+	return __of_get_next_status_child(node, prev, __of_device_is_available);
+}
 EXPORT_SYMBOL(of_get_next_available_child);
 
 /**