drivers/gpu/drm/omapdrm/dss/dss-of.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
   4  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
   5  */
   6
   7 #include <linux/err.h>
   8 #include <linux/of.h>
   9 #include <linux/of_graph.h>
  10
  11 #include "omapdss.h"
  12
  13 struct omap_dss_device *
  14 omapdss_of_find_connected_device(struct device_node *node, unsigned int port)
  15 {
  16         struct device_node *remote_node;
  17         struct omap_dss_device *dssdev;
  18
  19         remote_node = of_graph_get_remote_node(node, port, 0);
  20         if (!remote_node)
  21                 return NULL;
  22
  23         dssdev = omapdss_find_device_by_node(remote_node);
  24         of_node_put(remote_node);
  25
  26         return dssdev ? dssdev : ERR_PTR(-EPROBE_DEFER);
  27 }
  28 EXPORT_SYMBOL_GPL(omapdss_of_find_connected_device);