1 files changed, 42 insertions, 0 deletions

diff --git a/drivers/reset/core.c b/drivers/reset/core.c
index d1887c0ed5d3..9582efb70025 100644
--- a/drivers/reset/core.c
+++ b/drivers/reset/core.c
@@ -795,3 +795,45 @@ devm_reset_control_array_get(struct device *dev, bool shared, bool optional)
         return rstc;
 }
 EXPORT_SYMBOL_GPL(devm_reset_control_array_get);
+
+static int reset_control_get_count_from_lookup(struct device *dev)
+{
+        const struct reset_control_lookup *lookup;
+        const char *dev_id;
+        int count = 0;
+
+        if (!dev)
+                return -EINVAL;
+
+        dev_id = dev_name(dev);
+        mutex_lock(&reset_lookup_mutex);
+
+        list_for_each_entry(lookup, &reset_lookup_list, list) {
+                if (!strcmp(lookup->dev_id, dev_id))
+                        count++;
+        }
+
+        mutex_unlock(&reset_lookup_mutex);
+
+        if (count == 0)
+                count = -ENOENT;
+
+        return count;
+}
+
+/**
+ * reset_control_get_count - Count number of resets available with a device
+ *
+ * @dev: device for which to return the number of resets
+ *
+ * Returns positive reset count on success, or error number on failure and
+ * on count being zero.
+ */
+int reset_control_get_count(struct device *dev)
+{
+        if (dev->of_node)
+                return of_reset_control_get_count(dev->of_node);
+
+        return reset_control_get_count_from_lookup(dev);
+}
+EXPORT_SYMBOL_GPL(reset_control_get_count);