1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/of/device.c b/drivers/of/device.c
index 7d18f8e0b013..275cc9cee14c 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -170,3 +170,51 @@ ssize_t of_device_get_modalias(struct of_device *ofdev,
 
 	return tsize;
 }
+
+/**
+ * of_device_uevent - Display OF related uevent information
+ */
+int 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;
+
+	if (add_uevent_var(env, "OF_TYPE=%s", dev->of_node->type))
+		return -ENOMEM;
+
+	/* 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;
+
+		sl = strlen(compat) + 1;
+		compat += sl;
+		cplen -= sl;
+		seen++;
+	}
+
+	if (add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen))
+		return -ENOMEM;
+
+	/* modalias is trickier, we add it in 2 steps */
+	if (add_uevent_var(env, "MODALIAS="))
+		return -ENOMEM;
+
+	sl = of_device_get_modalias(to_of_device(dev), &env->buf[env->buflen-1],
+				    sizeof(env->buf) - env->buflen);
+	if (sl >= (sizeof(env->buf) - env->buflen))
+		return -ENOMEM;
+	env->buflen += sl;
+
+	return 0;
+}