include/media/v4l2-of.h

   1 /*
   2  * V4L2 OF binding parsing library
   3  *
   4  * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd.
   5  * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
   6  *
   7  * Copyright (C) 2012 Renesas Electronics Corp.
   8  * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  */
  14 #ifndef _V4L2_OF_H
  15 #define _V4L2_OF_H
  16
  17 #include <linux/list.h>
  18 #include <linux/types.h>
  19 #include <linux/errno.h>
  20 #include <linux/of_graph.h>
  21
  22 #include <media/v4l2-mediabus.h>
  23
  24 struct device_node;
  25
  26 /**
  27  * struct v4l2_of_bus_mipi_csi2 - MIPI CSI-2 bus data structure
  28  * @flags: media bus (V4L2_MBUS_*) flags
  29  * @data_lanes: an array of physical data lane indexes
  30  * @clock_lane: physical lane index of the clock lane
  31  * @num_data_lanes: number of data lanes
  32  */
  33 struct v4l2_of_bus_mipi_csi2 {
  34         unsigned int flags;
  35         unsigned char data_lanes[4];
  36         unsigned char clock_lane;
  37         unsigned short num_data_lanes;
  38 };
  39
  40 /**
  41  * struct v4l2_of_bus_parallel - parallel data bus data structure
  42  * @flags: media bus (V4L2_MBUS_*) flags
  43  * @bus_width: bus width in bits
  44  * @data_shift: data shift in bits
  45  */
  46 struct v4l2_of_bus_parallel {
  47         unsigned int flags;
  48         unsigned char bus_width;
  49         unsigned char data_shift;
  50 };
  51
  52 /**
  53  * struct v4l2_of_endpoint - the endpoint data structure
  54  * @base: struct of_endpoint containing port, id, and local of_node
  55  * @bus_type: bus type
  56  * @bus: bus configuration data structure
  57  * @head: list head for this structure
  58  */
  59 struct v4l2_of_endpoint {
  60         struct of_endpoint base;
  61         enum v4l2_mbus_type bus_type;
  62         union {
  63                 struct v4l2_of_bus_parallel parallel;
  64                 struct v4l2_of_bus_mipi_csi2 mipi_csi2;
  65         } bus;
  66         struct list_head head;
  67 };
  68
  69 #ifdef CONFIG_OF
  70 int v4l2_of_parse_endpoint(const struct device_node *node,
  71                            struct v4l2_of_endpoint *endpoint);
  72 #else /* CONFIG_OF */
  73
  74 static inline int v4l2_of_parse_endpoint(const struct device_node *node,
  75                                         struct v4l2_of_endpoint *link)
  76 {
  77         return -ENOSYS;
  78 }
  79
  80 #endif /* CONFIG_OF */
  81
  82 #endif /* _V4L2_OF_H */