videomode: implement public of_get_display_timing()

[firefly-linux-kernel-4.4.55.git] / drivers / video / of_display_timing.c

diff --git a/drivers/video/of_display_timing.c b/drivers/video/of_display_timing.c
index 0e8102344b2ee52c12937c28f718a7bad972bccb..9c0f17b2e6fb59309449e5a62b99925c23d511da 100644 (file)
--- a/drivers/video/of_display_timing.c
+++ b/drivers/video/of_display_timing.c
@@ -53,10 +53,10 @@ static int parse_timing_property(struct device_node *np, const char *name,
 }
 
 /**
- * of_get_display_timing - parse display_timing entry from device_node
+ * of_parse_display_timing - parse display_timing entry from device_node
  * @np: device_node with the properties
  **/
-static int of_get_display_timing(struct device_node *np,
+static int of_parse_display_timing(struct device_node *np,
                struct display_timing *dt)
 {
        u32 val = 0;
@@ -102,6 +102,33 @@ static int of_get_display_timing(struct device_node *np,
        return 0;
 }
 
+/**
+ * of_get_display_timing - parse a display_timing entry
+ * @np: device_node with the timing subnode
+ * @name: name of the timing node
+ * @dt: display_timing struct to fill
+ **/
+int of_get_display_timing(struct device_node *np, const char *name,
+               struct display_timing *dt)
+{
+       struct device_node *timing_np;
+
+       if (!np) {
+               pr_err("%s: no devicenode given\n", of_node_full_name(np));
+               return -EINVAL;
+       }
+
+       timing_np = of_find_node_by_name(np, name);
+       if (!timing_np) {
+               pr_err("%s: could not find node '%s'\n",
+                       of_node_full_name(np), name);
+               return -ENOENT;
+       }
+
+       return of_parse_display_timing(timing_np, dt);
+}
+EXPORT_SYMBOL_GPL(of_get_display_timing);
+
 /**
  * of_get_display_timings - parse all display_timing entries from a device_node
  * @np: device_node with the subnodes
@@ -177,7 +204,7 @@ struct display_timings *of_get_display_timings(struct device_node *np)
                        goto timingfail;
                }
 
-               r = of_get_display_timing(entry, dt);
+               r = of_parse_display_timing(entry, dt);
                if (r) {
                        /*
                         * to not encourage wrong devicetrees, fail in case of