linux-kernel - [RFC PATCH 49/77] dtc: Handle orphan nodes in dti_get_xxx_by

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Message-ID: <20260112142009.1006236-50-herve.codina@bootlin.com>
Date: Mon, 12 Jan 2026 15:19:39 +0100
From: Herve Codina <herve.codina@...tlin.com>
To: David Gibson <david@...son.dropbear.id.au>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>
Cc: Ayush Singh <ayush@...gleboard.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	devicetree-compiler@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	devicetree-spec@...r.kernel.org,
	Hui Pu <hui.pu@...ealthcare.com>,
	Ian Ray <ian.ray@...ealthcare.com>,
	Luca Ceresoli <luca.ceresoli@...tlin.com>,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
	Herve Codina <herve.codina@...tlin.com>
Subject: [RFC PATCH 49/77] dtc: Handle orphan nodes in dti_get_xxx_by_yyy()

Orphan nodes have been introduced recently.

Retrieving a node, a property and/or a marker from an orphan node tree
is perfectly legit.

Those retrievals are performed by the dti_get_xxx_by_yyy() functions
family.

Update them to handle orphan nodes.

Signed-off-by: Herve Codina <herve.codina@...tlin.com>
---
 livetree.c | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/livetree.c b/livetree.c
index 057997a..fa9daff 100644
--- a/livetree.c
+++ b/livetree.c
@@ -789,6 +789,7 @@ static struct node *get_node_by_ref(struct node *tree, const char *ref)
 
 struct node *dti_get_node_by_path(struct dt_info *dti, const char *path)
 {
+	struct node *orphan;
 	struct node *node;
 
 	if (dti->dt) {
@@ -797,11 +798,18 @@ struct node *dti_get_node_by_path(struct dt_info *dti, const char *path)
 			return node;
 	}
 
+	for_each_orphan(dti->orphanlist, orphan) {
+		node = get_node_by_path(orphan, path);
+		if (node)
+			return node;
+	}
+
 	return NULL;
 }
 
 struct node *dti_get_node_by_label(struct dt_info *dti, const char *label)
 {
+	struct node *orphan;
 	struct node *node;
 
 	if (dti->dt) {
@@ -810,11 +818,18 @@ struct node *dti_get_node_by_label(struct dt_info *dti, const char *label)
 			return node;
 	}
 
+	for_each_orphan(dti->orphanlist, orphan) {
+		node = get_node_by_label(orphan, label);
+		if (node)
+			return node;
+	}
+
 	return NULL;
 }
 
 struct node *dti_get_node_by_phandle(struct dt_info *dti, cell_t phandle)
 {
+	struct node *orphan;
 	struct node *node;
 
 	if (dti->dt) {
@@ -823,11 +838,18 @@ struct node *dti_get_node_by_phandle(struct dt_info *dti, cell_t phandle)
 			return node;
 	}
 
+	for_each_orphan(dti->orphanlist, orphan) {
+		node = get_node_by_phandle(orphan, phandle);
+		if (node)
+			return node;
+	}
+
 	return NULL;
 }
 
 struct node *dti_get_node_by_ref(struct dt_info *dti, const char *ref)
 {
+	struct node *orphan;
 	struct node *node;
 
 	if (dti->dt) {
@@ -836,6 +858,12 @@ struct node *dti_get_node_by_ref(struct dt_info *dti, const char *ref)
 			return node;
 	}
 
+	for_each_orphan(dti->orphanlist, orphan) {
+		node = get_node_by_ref(orphan, ref);
+		if (node)
+			return node;
+	}
+
 	return NULL;
 }
 
@@ -844,6 +872,7 @@ struct property *dti_get_property_by_label(struct dt_info *dti,
 					   struct node **node)
 {
 	struct property *property;
+	struct node *orphan;
 
 	if (dti->dt) {
 		property = get_property_by_label(dti->dt, label, node);
@@ -851,6 +880,12 @@ struct property *dti_get_property_by_label(struct dt_info *dti,
 			return property;
 	}
 
+	for_each_orphan(dti->orphanlist, orphan) {
+		property = get_property_by_label(orphan, label, node);
+		if (property)
+			return property;
+	}
+
 	*node = NULL;
 	return NULL;
 }
@@ -859,6 +894,7 @@ struct marker *dti_get_marker_label(struct dt_info *dti, const char *label,
 				    struct node **node, struct property **prop)
 {
 	struct marker *marker;
+	struct node *orphan;
 
 	if (dti->dt) {
 		marker = get_marker_label(dti->dt, label, node, prop);
@@ -866,6 +902,12 @@ struct marker *dti_get_marker_label(struct dt_info *dti, const char *label,
 			return marker;
 	}
 
+	for_each_orphan(dti->orphanlist, orphan) {
+		marker = get_marker_label(orphan, label, node, prop);
+		if (marker)
+			return marker;
+	}
+
 	*prop = NULL;
 	*node = NULL;
 	return NULL;
-- 
2.52.0