Merge tag 'devicetree-for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull DeviceTree updates from Rob Herring:

 - Sync dtc to upstream version v1.4.6-9-gaadd0b65c987. This adds a
   bunch more warnings (hidden behind W=1).

 - Build dtc lexer and parser files instead of using shipped versions.

 - Rework overlay apply API to take an FDT as input and apply overlays
   in a single step.

 - Add a phandle lookup cache. This improves boot time by hundreds of
   msec on systems with large DT.

 - Add trivial mcp4017/18/19 potentiometers bindings.

 - Remove VLA stack usage in DT code.

* tag 'devicetree-for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (26 commits)
  of: unittest: fix an error code in of_unittest_apply_overlay()
  of: unittest: move misplaced function declaration
  of: unittest: Remove VLA stack usage
  of: overlay: Fix forgotten reference to of_overlay_apply()
  of: Documentation: Fix forgotten reference to of_overlay_apply()
  of: unittest: local return value variable related cleanups
  of: unittest: remove unneeded local return value variables
  dt-bindings: trivial: add various mcp4017/18/19 potentiometers
  of: unittest: fix an error test in of_unittest_overlay_8()
  of: cache phandle nodes to reduce cost of of_find_node_by_phandle()
  dt-bindings: rockchip-dw-mshc: use consistent clock names
  MAINTAINERS: Add linux/of_*.h headers to appropriate subsystems
  scripts: turn off some new dtc warnings by default
  scripts/dtc: Update to upstream version v1.4.6-9-gaadd0b65c987
  scripts/dtc: generate lexer and parser during build instead of shipping
  powerpc: boot: add strrchr function
  of: overlay: do not include path in full_name of added nodes
  of: unittest: clean up changeset test
  arm64/efi: Make strrchr() available to the EFI namespace
  ARM: boot: add strrchr function
  ...

26 files changed, 628 insertions, 5035 deletions

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index e3215b7652ee..45b9aa3ca39e 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -210,7 +210,7 @@ $(filter %.tab.c,$(targets)): $(obj)/%.tab.c: $(src)/%.y FORCE
 	$(call if_changed,bison)
 
 quiet_cmd_bison_h = YACC    $@
-      cmd_bison_h = bison -o/dev/null --defines=$@ -t -l -p $(YACC_PREFIX) $<
+      cmd_bison_h = bison -o/dev/null --defines=$@ -t -l $<
 
 ifdef REGENERATE_PARSERS
 .PRECIOUS: $(src)/%.tab.h_shipped
@@ -269,10 +269,9 @@ DTC ?= $(objtree)/scripts/dtc/dtc
 # Disable noisy checks by default
 ifeq ($(findstring 1,$(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),)
 DTC_FLAGS += -Wno-unit_address_vs_reg \
-	-Wno-simple_bus_reg \
 	-Wno-unit_address_format \
-	-Wno-pci_bridge \
-	-Wno-pci_device_bus_num \
+	-Wno-avoid_unnecessary_addr_size \
+	-Wno-alias_paths \
 	-Wno-pci_device_reg
 endif
 
@@ -309,7 +308,7 @@ cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
 		-d $(depfile).dtc.tmp $(dtc-tmp) ; \
 	cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
 
-$(obj)/%.dtb: $(src)/%.dts FORCE
+$(obj)/%.dtb: $(src)/%.dts $(DTC) FORCE
 	$(call if_changed_dep,dtc)
 
 dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
diff --git a/scripts/dtc/Makefile b/scripts/dtc/Makefile
index 0dc922bb7aea..a88b8c9bf46d 100644
--- a/scripts/dtc/Makefile
+++ b/scripts/dtc/Makefile
@@ -28,5 +28,7 @@ HOSTCFLAGS_dtc-parser.tab.o := $(HOSTCFLAGS_DTC)
 # dependencies on generated files need to be listed explicitly
 $(obj)/dtc-lexer.lex.o: $(obj)/dtc-parser.tab.h
 
-# generated files need to be cleaned explicitly
-clean-files	:= dtc-lexer.lex.c dtc-parser.tab.c dtc-parser.tab.h
+# generated files need to include *.cmd and be cleaned explicitly
+generated-files	:= dtc-lexer.lex.c dtc-parser.tab.c dtc-parser.tab.h
+targets		:= $(generated-files)
+clean-files	:= $(generated-files)
diff --git a/scripts/dtc/checks.c b/scripts/dtc/checks.c
index e66138449886..c07ba4da9e36 100644
--- a/scripts/dtc/checks.c
+++ b/scripts/dtc/checks.c
@@ -53,26 +53,28 @@ struct check {
 	struct check **prereq;
 };
 
-#define CHECK_ENTRY(_nm, _fn, _d, _w, _e, ...)	       \
-	static struct check *_nm##_prereqs[] = { __VA_ARGS__ }; \
-	static struct check _nm = { \
-		.name = #_nm, \
-		.fn = (_fn), \
-		.data = (_d), \
-		.warn = (_w), \
-		.error = (_e), \
+#define CHECK_ENTRY(nm_, fn_, d_, w_, e_, ...)	       \
+	static struct check *nm_##_prereqs[] = { __VA_ARGS__ }; \
+	static struct check nm_ = { \
+		.name = #nm_, \
+		.fn = (fn_), \
+		.data = (d_), \
+		.warn = (w_), \
+		.error = (e_), \
 		.status = UNCHECKED, \
-		.num_prereqs = ARRAY_SIZE(_nm##_prereqs), \
-		.prereq = _nm##_prereqs, \
+		.num_prereqs = ARRAY_SIZE(nm_##_prereqs), \
+		.prereq = nm_##_prereqs, \
 	};
-#define WARNING(_nm, _fn, _d, ...) \
-	CHECK_ENTRY(_nm, _fn, _d, true, false, __VA_ARGS__)
-#define ERROR(_nm, _fn, _d, ...) \
-	CHECK_ENTRY(_nm, _fn, _d, false, true, __VA_ARGS__)
-#define CHECK(_nm, _fn, _d, ...) \
-	CHECK_ENTRY(_nm, _fn, _d, false, false, __VA_ARGS__)
-
-static inline void  PRINTF(3, 4) check_msg(struct check *c, struct dt_info *dti,
+#define WARNING(nm_, fn_, d_, ...) \
+	CHECK_ENTRY(nm_, fn_, d_, true, false, __VA_ARGS__)
+#define ERROR(nm_, fn_, d_, ...) \
+	CHECK_ENTRY(nm_, fn_, d_, false, true, __VA_ARGS__)
+#define CHECK(nm_, fn_, d_, ...) \
+	CHECK_ENTRY(nm_, fn_, d_, false, false, __VA_ARGS__)
+
+static inline void  PRINTF(5, 6) check_msg(struct check *c, struct dt_info *dti,
+					   struct node *node,
+					   struct property *prop,
 					   const char *fmt, ...)
 {
 	va_list ap;
@@ -83,19 +85,33 @@ static inline void  PRINTF(3, 4) check_msg(struct check *c, struct dt_info *dti,
 		fprintf(stderr, "%s: %s (%s): ",
 			strcmp(dti->outname, "-") ? dti->outname : "<stdout>",
 			(c->error) ? "ERROR" : "Warning", c->name);
+		if (node) {
+			fprintf(stderr, "%s", node->fullpath);
+			if (prop)
+				fprintf(stderr, ":%s", prop->name);
+			fputs(": ", stderr);
+		}
 		vfprintf(stderr, fmt, ap);
 		fprintf(stderr, "\n");
 	}
 	va_end(ap);
 }
 
-#define FAIL(c, dti, ...)						\
+#define FAIL(c, dti, node, ...)						\
+	do {								\
+		TRACE((c), "\t\tFAILED at %s:%d", __FILE__, __LINE__);	\
+		(c)->status = FAILED;					\
+		check_msg((c), dti, node, NULL, __VA_ARGS__);		\
+	} while (0)
+
+#define FAIL_PROP(c, dti, node, prop, ...)				\
 	do {								\
 		TRACE((c), "\t\tFAILED at %s:%d", __FILE__, __LINE__);	\
 		(c)->status = FAILED;					\
-		check_msg((c), dti, __VA_ARGS__);			\
+		check_msg((c), dti, node, prop, __VA_ARGS__);		\
 	} while (0)
 
+
 static void check_nodes_props(struct check *c, struct dt_info *dti, struct node *node)
 {
 	struct node *child;
@@ -126,7 +142,7 @@ static bool run_check(struct check *c, struct dt_info *dti)
 		error = error || run_check(prq, dti);
 		if (prq->status != PASSED) {
 			c->status = PREREQ;
-			check_msg(c, dti, "Failed prerequisite '%s'",
+			check_msg(c, dti, NULL, NULL, "Failed prerequisite '%s'",
 				  c->prereq[i]->name);
 		}
 	}
@@ -156,7 +172,7 @@ out:
 static inline void check_always_fail(struct check *c, struct dt_info *dti,
 				     struct node *node)
 {
-	FAIL(c, dti, "always_fail check");
+	FAIL(c, dti, node, "always_fail check");
 }
 CHECK(always_fail, check_always_fail, NULL);
 
@@ -171,14 +187,42 @@ static void check_is_string(struct check *c, struct dt_info *dti,
 		return; /* Not present, assumed ok */
 
 	if (!data_is_one_string(prop->val))
-		FAIL(c, dti, "\"%s\" property in %s is not a string",
-		     propname, node->fullpath);
+		FAIL_PROP(c, dti, node, prop, "property is not a string");
 }
 #define WARNING_IF_NOT_STRING(nm, propname) \
 	WARNING(nm, check_is_string, (propname))
 #define ERROR_IF_NOT_STRING(nm, propname) \
 	ERROR(nm, check_is_string, (propname))
 
+static void check_is_string_list(struct check *c, struct dt_info *dti,
+				 struct node *node)
+{
+	int rem, l;
+	struct property *prop;
+	char *propname = c->data;
+	char *str;
+
+	prop = get_property(node, propname);
+	if (!prop)
+		return; /* Not present, assumed ok */
+
+	str = prop->val.val;
+	rem = prop->val.len;
+	while (rem > 0) {
+		l = strnlen(str, rem);
+		if (l == rem) {
+			FAIL_PROP(c, dti, node, prop, "property is not a string list");
+			break;
+		}
+		rem -= l + 1;
+		str += l + 1;
+	}
+}
+#define WARNING_IF_NOT_STRING_LIST(nm, propname) \
+	WARNING(nm, check_is_string_list, (propname))
+#define ERROR_IF_NOT_STRING_LIST(nm, propname) \
+	ERROR(nm, check_is_string_list, (propname))
+
 static void check_is_cell(struct check *c, struct dt_info *dti,
 			  struct node *node)
 {
@@ -190,8 +234,7 @@ static void check_is_cell(struct check *c, struct dt_info *dti,
 		return; /* Not present, assumed ok */
 
 	if (prop->val.len != sizeof(cell_t))
-		FAIL(c, dti, "\"%s\" property in %s is not a single cell",
-		     propname, node->fullpath);
+		FAIL_PROP(c, dti, node, prop, "property is not a single cell");
 }
 #define WARNING_IF_NOT_CELL(nm, propname) \
 	WARNING(nm, check_is_cell, (propname))
@@ -212,8 +255,7 @@ static void check_duplicate_node_names(struct check *c, struct dt_info *dti,
 		     child2;
 		     child2 = child2->next_sibling)
 			if (streq(child->name, child2->name))
-				FAIL(c, dti, "Duplicate node name %s",
-				     child->fullpath);
+				FAIL(c, dti, node, "Duplicate node name");
 }
 ERROR(duplicate_node_names, check_duplicate_node_names, NULL);
 
@@ -227,8 +269,7 @@ static void check_duplicate_property_names(struct check *c, struct dt_info *dti,
 			if (prop2->deleted)
 				continue;
 			if (streq(prop->name, prop2->name))
-				FAIL(c, dti, "Duplicate property name %s in %s",
-				     prop->name, node->fullpath);
+				FAIL_PROP(c, dti, node, prop, "Duplicate property name");
 		}
 	}
 }
@@ -246,8 +287,8 @@ static void check_node_name_chars(struct check *c, struct dt_info *dti,
 	int n = strspn(node->name, c->data);
 
 	if (n < strlen(node->name))
-		FAIL(c, dti, "Bad character '%c' in node %s",
-		     node->name[n], node->fullpath);
+		FAIL(c, dti, node, "Bad character '%c' in node name",
+		     node->name[n]);
 }
 ERROR(node_name_chars, check_node_name_chars, PROPNODECHARS "@");
 
@@ -257,8 +298,8 @@ static void check_node_name_chars_strict(struct check *c, struct dt_info *dti,
 	int n = strspn(node->name, c->data);
 
 	if (n < node->basenamelen)
-		FAIL(c, dti, "Character '%c' not recommended in node %s",
-		     node->name[n], node->fullpath);
+		FAIL(c, dti, node, "Character '%c' not recommended in node name",
+		     node->name[n]);
 }
 CHECK(node_name_chars_strict, check_node_name_chars_strict, PROPNODECHARSSTRICT);
 
@@ -266,8 +307,7 @@ static void check_node_name_format(struct check *c, struct dt_info *dti,
 				   struct node *node)
 {
 	if (strchr(get_unitname(node), '@'))
-		FAIL(c, dti, "Node %s has multiple '@' characters in name",
-		     node->fullpath);
+		FAIL(c, dti, node, "multiple '@' characters in node name");
 }
 ERROR(node_name_format, check_node_name_format, NULL, &node_name_chars);
 
@@ -285,12 +325,10 @@ static void check_unit_address_vs_reg(struct check *c, struct dt_info *dti,
 
 	if (prop) {
 		if (!unitname[0])
-			FAIL(c, dti, "Node %s has a reg or ranges property, but no unit name",
-			    node->fullpath);
+			FAIL(c, dti, node, "node has a reg or ranges property, but no unit name");
 	} else {
 		if (unitname[0])
-			FAIL(c, dti, "Node %s has a unit name, but no reg property",
-			    node->fullpath);
+			FAIL(c, dti, node, "node has a unit name, but no reg property");
 	}
 }
 WARNING(unit_address_vs_reg, check_unit_address_vs_reg, NULL);
@@ -304,8 +342,8 @@ static void check_property_name_chars(struct check *c, struct dt_info *dti,
 		int n = strspn(prop->name, c->data);
 
 		if (n < strlen(prop->name))
-			FAIL(c, dti, "Bad character '%c' in property name \"%s\", node %s",
-			     prop->name[n], prop->name, node->fullpath);
+			FAIL_PROP(c, dti, node, prop, "Bad character '%c' in property name",
+				  prop->name[n]);
 	}
 }
 ERROR(property_name_chars, check_property_name_chars, PROPNODECHARS);
@@ -336,8 +374,8 @@ static void check_property_name_chars_strict(struct check *c,
 			n = strspn(name, c->data);
 		}
 		if (n < strlen(name))
-			FAIL(c, dti, "Character '%c' not recommended in property name \"%s\", node %s",
-			     name[n], prop->name, node->fullpath);
+			FAIL_PROP(c, dti, node, prop, "Character '%c' not recommended in property name",
+				  name[n]);
 	}
 }
 CHECK(property_name_chars_strict, check_property_name_chars_strict, PROPNODECHARSSTRICT);
@@ -370,7 +408,7 @@ static void check_duplicate_label(struct check *c, struct dt_info *dti,
 		return;
 
 	if ((othernode != node) || (otherprop != prop) || (othermark != mark))
-		FAIL(c, dti, "Duplicate label '%s' on " DESCLABEL_FMT
+		FAIL(c, dti, node, "Duplicate label '%s' on " DESCLABEL_FMT
 		     " and " DESCLABEL_FMT,
 		     label, DESCLABEL_ARGS(node, prop, mark),
 		     DESCLABEL_ARGS(othernode, otherprop, othermark));
@@ -410,8 +448,8 @@ static cell_t check_phandle_prop(struct check *c, struct dt_info *dti,
 		return 0;
 
 	if (prop->val.len != sizeof(cell_t)) {
-		FAIL(c, dti, "%s has bad length (%d) %s property",
-		     node->fullpath, prop->val.len, prop->name);
+		FAIL_PROP(c, dti, node, prop, "bad length (%d) %s property",
+			  prop->val.len, prop->name);
 		return 0;
 	}
 
@@ -422,8 +460,8 @@ static cell_t check_phandle_prop(struct check *c, struct dt_info *dti,
 			/* "Set this node's phandle equal to some
 			 * other node's phandle".  That's nonsensical
 			 * by construction. */ {
-			FAIL(c, dti, "%s in %s is a reference to another node",
-			     prop->name, node->fullpath);
+			FAIL(c, dti, node, "%s is a reference to another node",
+			     prop->name);
 		}
 		/* But setting this node's phandle equal to its own
 		 * phandle is allowed - that means allocate a unique
@@ -436,8 +474,8 @@ static cell_t check_phandle_prop(struct check *c, struct dt_info *dti,
 	phandle = propval_cell(prop);
 
 	if ((phandle == 0) || (phandle == -1)) {
-		FAIL(c, dti, "%s has bad value (0x%x) in %s property",
-		     node->fullpath, phandle, prop->name);
+		FAIL_PROP(c, dti, node, prop, "bad value (0x%x) in %s property",
+		     phandle, prop->name);
 		return 0;
 	}
 
@@ -463,16 +501,16 @@ static void check_explicit_phandles(struct check *c, struct dt_info *dti,
 		return;
 
 	if (linux_phandle && phandle && (phandle != linux_phandle))
-		FAIL(c, dti, "%s has mismatching 'phandle' and 'linux,phandle'"
-		     " properties", node->fullpath);
+		FAIL(c, dti, node, "mismatching 'phandle' and 'linux,phandle'"
+		     " properties");
 
 	if (linux_phandle && !phandle)
 		phandle = linux_phandle;
 
 	other = get_node_by_phandle(root, phandle);
 	if (other && (other != node)) {
-		FAIL(c, dti, "%s has duplicated phandle 0x%x (seen before at %s)",
-		     node->fullpath, phandle, other->fullpath);
+		FAIL(c, dti, node, "duplicated phandle 0x%x (seen before at %s)",
+		     phandle, other->fullpath);
 		return;
 	}
 
@@ -496,8 +534,8 @@ static void check_name_properties(struct check *c, struct dt_info *dti,
 
 	if ((prop->val.len != node->basenamelen+1)
 	    || (memcmp(prop->val.val, node->name, node->basenamelen) != 0)) {
-		FAIL(c, dti, "\"name\" property in %s is incorrect (\"%s\" instead"
-		     " of base node name)", node->fullpath, prop->val.val);
+		FAIL(c, dti, node, "\"name\" property is incorrect (\"%s\" instead"
+		     " of base node name)", prop->val.val);
 	} else {
 		/* The name property is correct, and therefore redundant.
 		 * Delete it */
@@ -531,7 +569,7 @@ static void fixup_phandle_references(struct check *c, struct dt_info *dti,
 			refnode = get_node_by_ref(dt, m->ref);
 			if (! refnode) {
 				if (!(dti->dtsflags & DTSF_PLUGIN))
-					FAIL(c, dti, "Reference to non-existent node or "
+					FAIL(c, dti, node, "Reference to non-existent node or "
 							"label \"%s\"\n", m->ref);
 				else /* mark the entry as unresolved */
 					*((fdt32_t *)(prop->val.val + m->offset)) =
@@ -563,7 +601,7 @@ static void fixup_path_references(struct check *c, struct dt_info *dti,
 
 			refnode = get_node_by_ref(dt, m->ref);
 			if (!refnode) {
-				FAIL(c, dti, "Reference to non-existent node or label \"%s\"\n",
+				FAIL(c, dti, node, "Reference to non-existent node or label \"%s\"\n",
 				     m->ref);
 				continue;
 			}
@@ -586,6 +624,45 @@ WARNING_IF_NOT_CELL(interrupt_cells_is_cell, "#interrupt-cells");
 WARNING_IF_NOT_STRING(device_type_is_string, "device_type");
 WARNING_IF_NOT_STRING(model_is_string, "model");
 WARNING_IF_NOT_STRING(status_is_string, "status");
+WARNING_IF_NOT_STRING(label_is_string, "label");
+
+WARNING_IF_NOT_STRING_LIST(compatible_is_string_list, "compatible");
+
+static void check_names_is_string_list(struct check *c, struct dt_info *dti,
+				       struct node *node)
+{
+	struct property *prop;
+
+	for_each_property(node, prop) {
+		const char *s = strrchr(prop->name, '-');
+		if (!s || !streq(s, "-names"))
+			continue;
+
+		c->data = prop->name;
+		check_is_string_list(c, dti, node);
+	}
+}
+WARNING(names_is_string_list, check_names_is_string_list, NULL);
+
+static void check_alias_paths(struct check *c, struct dt_info *dti,
+				    struct node *node)
+{
+	struct property *prop;
+
+	if (!streq(node->name, "aliases"))
+		return;
+
+	for_each_property(node, prop) {
+		if (!prop->val.val || !get_node_by_path(dti->dt, prop->val.val)) {
+			FAIL_PROP(c, dti, node, prop, "aliases property is not a valid node (%s)",
+				  prop->val.val);
+			continue;
+		}
+		if (strspn(prop->name, LOWERCASE DIGITS "-") != strlen(prop->name))
+			FAIL(c, dti, node, "aliases property name must include only lowercase and '-'");
+	}
+}
+WARNING(alias_paths, check_alias_paths, NULL);
 
 static void fixup_addr_size_cells(struct check *c, struct dt_info *dti,
 				  struct node *node)
@@ -622,21 +699,21 @@ static void check_reg_format(struct check *c, struct dt_info *dti,
 		return; /* No "reg", that's fine */
 
 	if (!node->parent) {
-		FAIL(c, dti, "Root node has a \"reg\" property");
+		FAIL(c, dti, node, "Root node has a \"reg\" property");
 		return;
 	}
 
 	if (prop->val.len == 0)
-		FAIL(c, dti, "\"reg\" property in %s is empty", node->fullpath);
+		FAIL_PROP(c, dti, node, prop, "property is empty");
 
 	addr_cells = node_addr_cells(node->parent);
 	size_cells = node_size_cells(node->parent);
 	entrylen = (addr_cells + size_cells) * sizeof(cell_t);
 
 	if (!entrylen || (prop->val.len % entrylen) != 0)
-		FAIL(c, dti, "\"reg\" property in %s has invalid length (%d bytes) "
-		     "(#address-cells == %d, #size-cells == %d)",
-		     node->fullpath, prop->val.len, addr_cells, size_cells);
+		FAIL_PROP(c, dti, node, prop, "property has invalid length (%d bytes) "
+			  "(#address-cells == %d, #size-cells == %d)",
+			  prop->val.len, addr_cells, size_cells);
 }
 WARNING(reg_format, check_reg_format, NULL, &addr_size_cells);
 
@@ -651,7 +728,7 @@ static void check_ranges_format(struct check *c, struct dt_info *dti,
 		return;
 
 	if (!node->parent) {
-		FAIL(c, dti, "Root node has a \"ranges\" property");
+		FAIL_PROP(c, dti, node, prop, "Root node has a \"ranges\" property");
 		return;
 	}
 
@@ -663,20 +740,20 @@ static void check_ranges_format(struct check *c, struct dt_info *dti,
 
 	if (prop->val.len == 0) {
 		if (p_addr_cells != c_addr_cells)
-			FAIL(c, dti, "%s has empty \"ranges\" property but its "
-			     "#address-cells (%d) differs from %s (%d)",
-			     node->fullpath, c_addr_cells, node->parent->fullpath,
-			     p_addr_cells);
+			FAIL_PROP(c, dti, node, prop, "empty \"ranges\" property but its "
+				  "#address-cells (%d) differs from %s (%d)",
+				  c_addr_cells, node->parent->fullpath,
+				  p_addr_cells);
 		if (p_size_cells != c_size_cells)
-			FAIL(c, dti, "%s has empty \"ranges\" property but its "
-			     "#size-cells (%d) differs from %s (%d)",
-			     node->fullpath, c_size_cells, node->parent->fullpath,
-			     p_size_cells);
+			FAIL_PROP(c, dti, node, prop, "empty \"ranges\" property but its "
+				  "#size-cells (%d) differs from %s (%d)",
+				  c_size_cells, node->parent->fullpath,
+				  p_size_cells);
 	} else if ((prop->val.len % entrylen) != 0) {
-		FAIL(c, dti, "\"ranges\" property in %s has invalid length (%d bytes) "
-		     "(parent #address-cells == %d, child #address-cells == %d, "
-		     "#size-cells == %d)", node->fullpath, prop->val.len,
-		     p_addr_cells, c_addr_cells, c_size_cells);
+		FAIL_PROP(c, dti, node, prop, "\"ranges\" property has invalid length (%d bytes) "
+			  "(parent #address-cells == %d, child #address-cells == %d, "
+			  "#size-cells == %d)", prop->val.len,
+			  p_addr_cells, c_addr_cells, c_size_cells);
 	}
 }
 WARNING(ranges_format, check_ranges_format, NULL, &addr_size_cells);
@@ -696,41 +773,33 @@ static void check_pci_bridge(struct check *c, struct dt_info *dti, struct node *
 
 	node->bus = &pci_bus;
 
-	if (!strneq(node->name, "pci", node->basenamelen) &&
-	    !strneq(node->name, "pcie", node->basenamelen))
-		FAIL(c, dti, "Node %s node name is not \"pci\" or \"pcie\"",
-			     node->fullpath);
+	if (!strprefixeq(node->name, node->basenamelen, "pci") &&
+	    !strprefixeq(node->name, node->basenamelen, "pcie"))
+		FAIL(c, dti, node, "node name is not \"pci\" or \"pcie\"");
 
 	prop = get_property(node, "ranges");
 	if (!prop)
-		FAIL(c, dti, "Node %s missing ranges for PCI bridge (or not a bridge)",
-			     node->fullpath);
+		FAIL(c, dti, node, "missing ranges for PCI bridge (or not a bridge)");
 
 	if (node_addr_cells(node) != 3)
-		FAIL(c, dti, "Node %s incorrect #address-cells for PCI bridge",
-			     node->fullpath);
+		FAIL(c, dti, node, "incorrect #address-cells for PCI bridge");
 	if (node_size_cells(node) != 2)
-		FAIL(c, dti, "Node %s incorrect #size-cells for PCI bridge",
-			     node->fullpath);
+		FAIL(c, dti, node, "incorrect #size-cells for PCI bridge");
 
 	prop = get_property(node, "bus-range");
 	if (!prop) {
-		FAIL(c, dti, "Node %s missing bus-range for PCI bridge",
-			     node->fullpath);
+		FAIL(c, dti, node, "missing bus-range for PCI bridge");
 		return;
 	}
 	if (prop->val.len != (sizeof(cell_t) * 2)) {
-		FAIL(c, dti, "Node %s bus-range must be 2 cells",
-			     node->fullpath);
+		FAIL_PROP(c, dti, node, prop, "value must be 2 cells");
 		return;
 	}
 	cells = (cell_t *)prop->val.val;
 	if (fdt32_to_cpu(cells[0]) > fdt32_to_cpu(cells[1]))
-		FAIL(c, dti, "Node %s bus-range 1st cell must be less than or equal to 2nd cell",
-			     node->fullpath);
+		FAIL_PROP(c, dti, node, prop, "1st cell must be less than or equal to 2nd cell");
 	if (fdt32_to_cpu(cells[1]) > 0xff)
-		FAIL(c, dti, "Node %s bus-range maximum bus number must be less than 256",
-			     node->fullpath);
+		FAIL_PROP(c, dti, node, prop, "maximum bus number must be less than 256");
 }
 WARNING(pci_bridge, check_pci_bridge, NULL,
 	&device_type_is_string, &addr_size_cells);
@@ -760,8 +829,8 @@ static void check_pci_device_bus_num(struct check *c, struct dt_info *dti, struc
 		max_bus = fdt32_to_cpu(cells[0]);
 	}
 	if ((bus_num < min_bus) || (bus_num > max_bus))
-		FAIL(c, dti, "Node %s PCI bus number %d out of range, expected (%d - %d)",
-		     node->fullpath, bus_num, min_bus, max_bus);
+		FAIL_PROP(c, dti, node, prop, "PCI bus number %d out of range, expected (%d - %d)",
+			  bus_num, min_bus, max_bus);
 }
 WARNING(pci_device_bus_num, check_pci_device_bus_num, NULL, &reg_format, &pci_bridge);
 
@@ -778,25 +847,22 @@ static void check_pci_device_reg(struct check *c, struct dt_info *dti, struct no
 
 	prop = get_property(node, "reg");
 	if (!prop) {
-		FAIL(c, dti, "Node %s missing PCI reg property", node->fullpath);
+		FAIL(c, dti, node, "missing PCI reg property");
 		return;
 	}
 
 	cells = (cell_t *)prop->val.val;
 	if (cells[1] || cells[2])
-		FAIL(c, dti, "Node %s PCI reg config space address cells 2 and 3 must be 0",
-			     node->fullpath);
+		FAIL_PROP(c, dti, node, prop, "PCI reg config space address cells 2 and 3 must be 0");
 
 	reg = fdt32_to_cpu(cells[0]);
 	dev = (reg & 0xf800) >> 11;
 	func = (reg & 0x700) >> 8;
 
 	if (reg & 0xff000000)
-		FAIL(c, dti, "Node %s PCI reg address is not configuration space",
-			     node->fullpath);
+		FAIL_PROP(c, dti, node, prop, "PCI reg address is not configuration space");
 	if (reg & 0x000000ff)
-		FAIL(c, dti, "Node %s PCI reg config space address register number must be 0",
-			     node->fullpath);
+		FAIL_PROP(c, dti, node, prop, "PCI reg config space address register number must be 0");
 
 	if (func == 0) {
 		snprintf(unit_addr, sizeof(unit_addr), "%x", dev);
@@ -808,8 +874,8 @@ static void check_pci_device_reg(struct check *c, struct dt_info *dti, struct no
 	if (streq(unitname, unit_addr))
 		return;
 
-	FAIL(c, dti, "Node %s PCI unit address format error, expected \"%s\"",
-	     node->fullpath, unit_addr);
+	FAIL(c, dti, node, "PCI unit address format error, expected \"%s\"",
+	     unit_addr);
 }
 WARNING(pci_device_reg, check_pci_device_reg, NULL, &reg_format, &pci_bridge);
 
@@ -828,7 +894,7 @@ static bool node_is_compatible(struct node *node, const char *compat)
 
 	for (str = prop->val.val, end = str + prop->val.len; str < end;
 	     str += strnlen(str, end - str) + 1) {
-		if (strneq(str, compat, end - str))
+		if (strprefixeq(str, end - str, compat))
 			return true;
 	}
 	return false;
@@ -865,7 +931,7 @@ static void check_simple_bus_reg(struct check *c, struct dt_info *dti, struct no
 
 	if (!cells) {
 		if (node->parent->parent && !(node->bus == &simple_bus))
-			FAIL(c, dti, "Node %s missing or empty reg/ranges property", node->fullpath);
+			FAIL(c, dti, node, "missing or empty reg/ranges property");
 		return;
 	}
 
@@ -875,8 +941,8 @@ static void check_simple_bus_reg(struct check *c, struct dt_info *dti, struct no
 
 	snprintf(unit_addr, sizeof(unit_addr), "%"PRIx64, reg);
 	if (!streq(unitname, unit_addr))
-		FAIL(c, dti, "Node %s simple-bus unit address format error, expected \"%s\"",
-		     node->fullpath, unit_addr);
+		FAIL(c, dti, node, "simple-bus unit address format error, expected \"%s\"",
+		     unit_addr);
 }
 WARNING(simple_bus_reg, check_simple_bus_reg, NULL, &reg_format, &simple_bus_bridge);
 
@@ -892,14 +958,12 @@ static void check_unit_address_format(struct check *c, struct dt_info *dti,
 		return;
 
 	if (!strncmp(unitname, "0x", 2)) {
-		FAIL(c, dti, "Node %s unit name should not have leading \"0x\"",
-		    node->fullpath);
+		FAIL(c, dti, node, "unit name should not have leading \"0x\"");
 		/* skip over 0x for next test */
 		unitname += 2;
 	}
 	if (unitname[0] == '0' && isxdigit(unitname[1]))
-		FAIL(c, dti, "Node %s unit name should not have leading 0s",
-		    node->fullpath);
+		FAIL(c, dti, node, "unit name should not have leading 0s");
 }
 WARNING(unit_address_format, check_unit_address_format, NULL,
 	&node_name_format, &pci_bridge, &simple_bus_bridge);
@@ -922,16 +986,38 @@ static void check_avoid_default_addr_size(struct check *c, struct dt_info *dti,
 		return;
 
 	if (node->parent->addr_cells == -1)
-		FAIL(c, dti, "Relying on default #address-cells value for %s",
-		     node->fullpath);
+		FAIL(c, dti, node, "Relying on default #address-cells value");
 
 	if (node->parent->size_cells == -1)
-		FAIL(c, dti, "Relying on default #size-cells value for %s",
-		     node->fullpath);
+		FAIL(c, dti, node, "Relying on default #size-cells value");
 }
 WARNING(avoid_default_addr_size, check_avoid_default_addr_size, NULL,
 	&addr_size_cells);
 
+static void check_avoid_unnecessary_addr_size(struct check *c, struct dt_info *dti,
+					      struct node *node)
+{
+	struct property *prop;
+	struct node *child;
+	bool has_reg = false;
+
+	if (!node->parent || node->addr_cells < 0 || node->size_cells < 0)
+		return;
+
+	if (get_property(node, "ranges") || !node->children)
+		return;
+
+	for_each_child(node, child) {
+		prop = get_property(child, "reg");
+		if (prop)
+			has_reg = true;
+	}
+
+	if (!has_reg)
+		FAIL(c, dti, node, "unnecessary #address-cells/#size-cells without \"ranges\" or child \"reg\" property");
+}
+WARNING(avoid_unnecessary_addr_size, check_avoid_unnecessary_addr_size, NULL, &avoid_default_addr_size);
+
 static void check_obsolete_chosen_interrupt_controller(struct check *c,
 						       struct dt_info *dti,
 						       struct node *node)
@@ -950,12 +1036,61 @@ static void check_obsolete_chosen_interrupt_controller(struct check *c,
 
 	prop = get_property(chosen, "interrupt-controller");
 	if (prop)
-		FAIL(c, dti, "/chosen has obsolete \"interrupt-controller\" "
-		     "property");
+		FAIL_PROP(c, dti, node, prop,
+			  "/chosen has obsolete \"interrupt-controller\" property");
 }
 WARNING(obsolete_chosen_interrupt_controller,
 	check_obsolete_chosen_interrupt_controller, NULL);
 
+static void check_chosen_node_is_root(struct check *c, struct dt_info *dti,
+				      struct node *node)
+{
+	if (!streq(node->name, "chosen"))
+		return;
+
+	if (node->parent != dti->dt)
+		FAIL(c, dti, node, "chosen node must be at root node");
+}
+WARNING(chosen_node_is_root, check_chosen_node_is_root, NULL);
+
+static void check_chosen_node_bootargs(struct check *c, struct dt_info *dti,
+				       struct node *node)
+{
+	struct property *prop;
+
+	if (!streq(node->name, "chosen"))
+		return;
+
+	prop = get_property(node, "bootargs");
+	if (!prop)
+		return;
+
+	c->data = prop->name;
+	check_is_string(c, dti, node);
+}
+WARNING(chosen_node_bootargs, check_chosen_node_bootargs, NULL);
+
+static void check_chosen_node_stdout_path(struct check *c, struct dt_info *dti,
+					  struct node *node)
+{
+	struct property *prop;
+
+	if (!streq(node->name, "chosen"))
+		return;<