dm: core: Provide ofnode_name_eq_unit() to accept a unit address

When a unit-address is provided, use it to match against the node
name.

Since this increases code size, put it into a separate function.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 23 insertions, 0 deletions

diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c
index 83c60069cb3..373c7840eef 100644
--- a/drivers/core/ofnode.c
+++ b/drivers/core/ofnode.c
@@ -309,6 +309,29 @@ bool ofnode_name_eq(ofnode node, const char *name)
 	return (strlen(name) == len) && !strncmp(node_name, name, len);
 }
 
+bool ofnode_name_eq_unit(ofnode node, const char *name)
+{
+	const char *node_name, *p;
+	int len;
+
+	assert(ofnode_valid(node));
+
+	node_name = ofnode_get_name(node);
+
+	/* check the whole name */
+	if (!strcmp(node_name, name))
+		return true;
+
+	/* if @name has no unit address, try the node name without it */
+	len = strlen(name);
+	p = strchr(node_name, '@');
+	if (p && !strchr(name, '@') && len == p - node_name &&
+	    !strncmp(node_name, name, len))
+		return true;
+
+	return false;
+}
+
 int ofnode_read_u8(ofnode node, const char *propname, u8 *outp)
 {
 	const u8 *cell;