target/linux/brcm63xx/patches-4.4/000-4.5-02-mtd-ofpart-grab-device-tree-node-directly-from-maste.patch

   1 From 3b6521eab0386a4854d47b1a01947d7dc46ec98d Mon Sep 17 00:00:00 2001
   2 From: Brian Norris <computersforpeace@gmail.com>
   3 Date: Fri, 30 Oct 2015 20:33:21 -0700
   4 Subject: [PATCH] mtd: ofpart: grab device tree node directly from master
   5  device node
   6
   7 It seems more logical to use a device node directly associated with the
   8 MTD master device (i.e., mtd->dev.of_node field) rather than requiring
   9 auxiliary partition parser information to be passed in by the driver in
  10 a separate struct.
  11
  12 This patch supports the mtd->dev.of_node field and deprecates the parser
  13 data 'of_node' field
  14
  15 Driver conversions may now follow.
  16
  17 Additional side benefit to assigning mtd->dev.of_node rather than using
  18 parser data: the driver core will automatically create a device -> node
  19 symlink for us.
  20
  21 Signed-off-by: Brian Norris <computersforpeace@gmail.com>
  22 Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
  23 ---
  24  drivers/mtd/ofpart.c           | 18 ++++++++++--------
  25  include/linux/mtd/partitions.h |  4 +++-
  26  2 files changed, 13 insertions(+), 9 deletions(-)
  27
  28 --- a/drivers/mtd/ofpart.c
  29 +++ b/drivers/mtd/ofpart.c
  30 @@ -37,10 +37,11 @@ static int parse_ofpart_partitions(struc
  31         bool dedicated = true;
  32
  33
  34 -       if (!data)
  35 -               return 0;
  36 -
  37 -       mtd_node = data->of_node;
  38 +       /*
  39 +        * of_node can be provided through auxiliary parser data or (preferred)
  40 +        * by assigning the master device node
  41 +        */
  42 +       mtd_node = data && data->of_node ? data->of_node : mtd_get_of_node(master);
  43         if (!mtd_node)
  44                 return 0;
  45
  46 @@ -157,10 +158,11 @@ static int parse_ofoldpart_partitions(st
  47         } *part;
  48         const char *names;
  49
  50 -       if (!data)
  51 -               return 0;
  52 -
  53 -       dp = data->of_node;
  54 +       /*
  55 +        * of_node can be provided through auxiliary parser data or (preferred)
  56 +        * by assigning the master device node
  57 +        */
  58 +       dp = data && data->of_node ? data->of_node : mtd_get_of_node(master);
  59         if (!dp)
  60                 return 0;
  61
  62 --- a/include/linux/mtd/partitions.h
  63 +++ b/include/linux/mtd/partitions.h
  64 @@ -56,7 +56,9 @@ struct device_node;
  65  /**
  66   * struct mtd_part_parser_data - used to pass data to MTD partition parsers.
  67   * @origin: for RedBoot, start address of MTD device
  68 - * @of_node: for OF parsers, device node containing partitioning information
  69 + * @of_node: for OF parsers, device node containing partitioning information.
  70 + *           This field is deprecated, as the device node should simply be
  71 + *           assigned to the master struct device.
  72   */
  73  struct mtd_part_parser_data {
  74         unsigned long origin;