1 files changed, 57 insertions, 0 deletions

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 51eef9b7b53f..42ad2db8f082 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -3342,6 +3342,63 @@ int snd_soc_of_parse_card_name(struct snd_soc_card *card,
 }
 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
 
+int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
+                                   const char *propname)
+{
+        struct device_node *np = card->dev->of_node;
+        int num_routes;
+        struct snd_soc_dapm_route *routes;
+        int i, ret;
+
+        num_routes = of_property_count_strings(np, propname);
+        if (num_routes & 1) {
+                dev_err(card->dev,
+                        "Property '%s's length is not even\n",
+                        propname);
+                return -EINVAL;
+        }
+        num_routes /= 2;
+        if (!num_routes) {
+                dev_err(card->dev,
+                        "Property '%s's length is zero\n",
+                        propname);
+                return -EINVAL;
+        }
+
+        routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
+                              GFP_KERNEL);
+        if (!routes) {
+                dev_err(card->dev,
+                        "Could not allocate DAPM route table\n");
+                return -EINVAL;
+        }
+
+        for (i = 0; i < num_routes; i++) {
+                ret = of_property_read_string_index(np, propname,
+                        2 * i, &routes[i].sink);
+                if (ret) {
+                        dev_err(card->dev,
+                                "Property '%s' index %d could not be read: %d\n",
+                                propname, 2 * i, ret);
+                        return -EINVAL;
+                }
+                ret = of_property_read_string_index(np, propname,
+                        (2 * i) + 1, &routes[i].source);
+                if (ret) {
+                        dev_err(card->dev,
+                                "Property '%s' index %d could not be read: %d\n",
+                                propname, (2 * i) + 1, ret);
+                        return -EINVAL;
+                }
+        }
+
+        card->num_dapm_routes = num_routes;
+        card->dapm_routes = routes;
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
+
 static int __init snd_soc_init(void)
 {
 #ifdef CONFIG_DEBUG_FS