scripts/dtc: Update to upstream version v1.4.6-21-g84e414b0b5bc

This adds the following commits from upstream:

84e414b0b5bc tests: Add a test case for the omit-if-no-ref keyword
4038fd90056e dtc: add ability to make nodes conditional on them being referenced
e1f139ea4900 checks: drop warning for missing PCI bridge bus-range
f4eba68d89ee checks: Print duplicate node name instead of parent name
46df1fb1b211 .travis.yml: Run valgrind checks via Travis
14a3002a1aee tests: Update valgrind suppressions for sw_tree1
02c5fe9debc0 tests: Remove valgrind error from tests/get_path
df536831d02c checks: add graph binding checks
2347c96edcbe checks: add a check for duplicate unit-addresses of child nodes
8f1b35f88395 Correct overlay syntactic sugar for generating target-path fragments
afbddcd418fb Suppress warnings on overlay fragments
119e27300359 Improve tests for dtc overlay generation

Signed-off-by: Rob Herring <robh@kernel.org>

1 files changed, 28 insertions, 11 deletions

diff --git a/scripts/dtc/dtc-parser.y b/scripts/dtc/dtc-parser.y
index 44af170abfea..011a5b25539a 100644
--- a/scripts/dtc/dtc-parser.y
+++ b/scripts/dtc/dtc-parser.y
@@ -63,6 +63,7 @@ extern bool treesource_error;
 %token DT_BITS
 %token DT_DEL_PROP
 %token DT_DEL_NODE
+%token DT_OMIT_NO_REF
 %token <propnodename> DT_PROPNODENAME
 %token <integer> DT_LITERAL
 %token <integer> DT_CHAR_LITERAL
@@ -190,18 +191,18 @@ devicetree:
 		}
 	| devicetree DT_REF nodedef
 		{
-			struct node *target = get_node_by_ref($1, $2);
-
-			if (target) {
-				merge_nodes(target, $3);
+			/*
+			 * We rely on the rule being always:
+			 *   versioninfo plugindecl memreserves devicetree
+			 * so $-1 is what we want (plugindecl)
+			 */
+			if ($<flags>-1 & DTSF_PLUGIN) {
+				add_orphan_node($1, $3, $2);
 			} else {
-				/*
-				 * We rely on the rule being always:
-				 *   versioninfo plugindecl memreserves devicetree
-				 * so $-1 is what we want (plugindecl)
-				 */
-				if ($<flags>-1 & DTSF_PLUGIN)
-					add_orphan_node($1, $3, $2);
+				struct node *target = get_node_by_ref($1, $2);
+
+				if (target)
+					merge_nodes(target, $3);
 				else
 					ERROR(&@2, "Label or path %s not found", $2);
 			}
@@ -219,6 +220,18 @@ devicetree:
 
 			$$ = $1;
 		}
+	| devicetree DT_OMIT_NO_REF DT_REF ';'
+		{
+			struct node *target = get_node_by_ref($1, $3);
+
+			if (target)
+				omit_node_if_unused(target);
+			else
+				ERROR(&@3, "Label or path %s not found", $3);
+
+
+			$$ = $1;
+		}
 	;
 
 nodedef:
@@ -523,6 +536,10 @@ subnode:
 		{
 			$$ = name_node(build_node_delete(), $2);
 		}
+	| DT_OMIT_NO_REF subnode
+		{
+			$$ = omit_node_if_unused($2);
+		}
 	| DT_LABEL subnode
 		{
 			add_label(&$2->labels, $1);