4 files changed, 86 insertions, 18 deletions

diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig
index 268163dd71c..6ea51dcbc72 100644
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -35,9 +35,10 @@ config OF_EARLY_FLATTREE
 config OF_PROMTREE
 	bool
 
+# Hardly any platforms need this.  It is safe to select, but only do so if you
+# need it.
 config OF_DYNAMIC
-	def_bool y
-	depends on PPC_OF
+	bool
 
 config OF_ADDRESS
 	def_bool y
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 133908a6fd8..58064498694 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -88,7 +88,7 @@ int of_n_size_cells(struct device_node *np)
 }
 EXPORT_SYMBOL(of_n_size_cells);
 
-#if !defined(CONFIG_SPARC)   /* SPARC doesn't do ref counting (yet) */
+#if defined(CONFIG_OF_DYNAMIC)
 /**
  *	of_node_get - Increment refcount of a node
  *	@node:	Node to inc refcount, NULL is supported to
@@ -161,7 +161,7 @@ void of_node_put(struct device_node *node)
 		kref_put(&node->kref, of_node_release);
 }
 EXPORT_SYMBOL(of_node_put);
-#endif /* !CONFIG_SPARC */
+#endif /* CONFIG_OF_DYNAMIC */
 
 struct property *of_find_property(const struct device_node *np,
 				  const char *name,
@@ -761,6 +761,42 @@ int of_property_read_string_index(struct device_node *np, const char *propname,
 }
 EXPORT_SYMBOL_GPL(of_property_read_string_index);
 
+/**
+ * of_property_match_string() - Find string in a list and return index
+ * @np: pointer to node containing string list property
+ * @propname: string list property name
+ * @string: pointer to string to search for in string list
+ *
+ * This function searches a string list property and returns the index
+ * of a specific string value.
+ */
+int of_property_match_string(struct device_node *np, const char *propname,
+			     const char *string)
+{
+	struct property *prop = of_find_property(np, propname, NULL);
+	size_t l;
+	int i;
+	const char *p, *end;
+
+	if (!prop)
+		return -EINVAL;
+	if (!prop->value)
+		return -ENODATA;
+
+	p = prop->value;
+	end = p + prop->length;
+
+	for (i = 0; p < end; i++, p += l) {
+		l = strlen(p) + 1;
+		if (p + l > end)
+			return -EILSEQ;
+		pr_debug("comparing %s with %s\n", string, p);
+		if (strcmp(string, p) == 0)
+			return i; /* Found it; return index */
+	}
+	return -ENODATA;
+}
+EXPORT_SYMBOL_GPL(of_property_match_string);
 
 /**
  * of_property_count_strings - Find and return the number of strings from a
diff --git a/drivers/of/device.c b/drivers/of/device.c
index 62b4b32ac88..4c74e4fc5a5 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -128,39 +128,41 @@ ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len)
 /**
  * of_device_uevent - Display OF related uevent information
  */
-int of_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+void of_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 {
 	const char *compat;
 	int seen = 0, cplen, sl;
 
 	if ((!dev) || (!dev->of_node))
-		return -ENODEV;
-
-	if (add_uevent_var(env, "OF_NAME=%s", dev->of_node->name))
-		return -ENOMEM;
+		return;
 
-	if (add_uevent_var(env, "OF_TYPE=%s", dev->of_node->type))
-		return -ENOMEM;
+	add_uevent_var(env, "OF_NAME=%s", dev->of_node->name);
+	add_uevent_var(env, "OF_FULLNAME=%s", dev->of_node->full_name);
+	if (dev->of_node->type && strcmp("<NULL>", dev->of_node->type) != 0)
+		add_uevent_var(env, "OF_TYPE=%s", dev->of_node->type);
 
 	/* Since the compatible field can contain pretty much anything
 	 * it's not really legal to split it out with commas. We split it
 	 * up using a number of environment variables instead. */
-
 	compat = of_get_property(dev->of_node, "compatible", &cplen);
 	while (compat && *compat && cplen > 0) {
-		if (add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat))
-			return -ENOMEM;
-
+		add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat);
 		sl = strlen(compat) + 1;
 		compat += sl;
 		cplen -= sl;
 		seen++;
 	}
+	add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen);
+}
 
-	if (add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen))
-		return -ENOMEM;
+int of_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)
+{
+	int sl;
+
+	if ((!dev) || (!dev->of_node))
+		return -ENODEV;
 
-	/* modalias is trickier, we add it in 2 steps */
+	/* Devicetree modalias is tricky, we add it in 2 steps */
 	if (add_uevent_var(env, "MODALIAS="))
 		return -ENOMEM;
 
diff --git a/drivers/of/selftest.c b/drivers/of/selftest.c
index 9d2b4803a9d..f24ffd7088d 100644
--- a/drivers/of/selftest.c
+++ b/drivers/of/selftest.c
@@ -120,6 +120,34 @@ static void __init of_selftest_parse_phandle_with_args(void)
 	pr_info("end - %s\n", passed_all ? "PASS" : "FAIL");
 }
 
+static void __init of_selftest_property_match_string(void)
+{
+	struct device_node *np;
+	int rc;
+
+	pr_info("start\n");
+	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
+	if (!np) {
+		pr_err("No testcase data in device tree\n");
+		return;
+	}
+
+	rc = of_property_match_string(np, "phandle-list-names", "first");
+	selftest(rc == 0, "first expected:0 got:%i\n", rc);
+	rc = of_property_match_string(np, "phandle-list-names", "second");
+	selftest(rc == 1, "second expected:0 got:%i\n", rc);
+	rc = of_property_match_string(np, "phandle-list-names", "third");
+	selftest(rc == 2, "third expected:0 got:%i\n", rc);
+	rc = of_property_match_string(np, "phandle-list-names", "fourth");
+	selftest(rc == -ENODATA, "unmatched string; rc=%i", rc);
+	rc = of_property_match_string(np, "missing-property", "blah");
+	selftest(rc == -EINVAL, "missing property; rc=%i", rc);
+	rc = of_property_match_string(np, "empty-property", "blah");
+	selftest(rc == -ENODATA, "empty property; rc=%i", rc);
+	rc = of_property_match_string(np, "unterminated-string", "blah");
+	selftest(rc == -EILSEQ, "unterminated string; rc=%i", rc);
+}
+
 static int __init of_selftest(void)
 {
 	struct device_node *np;
@@ -133,6 +161,7 @@ static int __init of_selftest(void)
 
 	pr_info("start of selftest - you will see error messages\n");
 	of_selftest_parse_phandle_with_args();
+	of_selftest_property_match_string();
 	pr_info("end of selftest - %s\n", selftest_passed ? "PASS" : "FAIL");
 	return 0;
 }