target/linux/ramips/patches-3.18/0008-MIPS-ralink-allow-manual-memory-override.patch

   1 From 071e97587a291d3a5bbd614a425f46b7f90310aa Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Sun, 16 Mar 2014 04:40:48 +0000
   4 Subject: [PATCH 08/57] MIPS: ralink: allow manual memory override
   5
   6 RT5350 relies on the bootloader setting up the memc correctly.
   7 On sme boards the setup is incorrect leading to 32 MB being available but only 16 being recognized. Allow these boards to manually override the memory range
   8 .
   9 Signed-off-by: John Crispin <blogic@openwrt.org>
  10 ---
  11  arch/mips/ralink/of.c |   16 +++++++++++++++-
  12  1 file changed, 15 insertions(+), 1 deletion(-)
  13
  14 --- a/arch/mips/ralink/of.c
  15 +++ b/arch/mips/ralink/of.c
  16 @@ -53,6 +53,17 @@ void __init device_tree_init(void)
  17         unflatten_and_copy_device_tree();
  18  }
  19
  20 +static int memory_dtb;
  21 +
  22 +static int __init early_init_dt_find_memory(unsigned long node, const char *uname,
  23 +                                    int depth, void *data)
  24 +{
  25 +       if (depth == 1 && !strcmp(uname, "memory@0"))
  26 +               memory_dtb = 1;
  27 +
  28 +       return 0;
  29 +}
  30 +
  31  void __init plat_mem_setup(void)
  32  {
  33         set_io_port_base(KSEG1);
  34 @@ -63,7 +74,10 @@ void __init plat_mem_setup(void)
  35          */
  36         __dt_setup_arch(__dtb_start);
  37
  38 -       if (soc_info.mem_size)
  39 +       of_scan_flat_dt(early_init_dt_find_memory, NULL);
  40 +       if (memory_dtb)
  41 +               of_scan_flat_dt(early_init_dt_scan_memory, NULL);
  42 +       else if (soc_info.mem_size)
  43                 add_memory_region(soc_info.mem_base, soc_info.mem_size * SZ_1M,
  44                                   BOOT_MEM_RAM);
  45         else