target/linux/s3c24xx/patches-2.6.24/1312-GTA02-Improve-NAND-timings.patch

   1 From e144bf41b8674bce731e1afebcd04030a85b4a5b Mon Sep 17 00:00:00 2001
   2 From: Harald Welte <laforge@openmoko.org>
   3 Date: Tue, 21 Oct 2008 08:13:09 +0100
   4 Subject: [PATCH] GTA02: Improve NAND timings
   5
   6 Rather than using conservative default timings for the NAND flash,
   7 use the timings as specified in the S3C2442B MCP data sheet.
   8
   9 Signed-off-by: Harald Welte <laforge@openmoko.org>
  10 ---
  11  arch/arm/mach-s3c2440/mach-gta02.c |   10 +++++-----
  12  1 files changed, 5 insertions(+), 5 deletions(-)
  13
  14 diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
  15 index 1a9d823..b1aa95b 100644
  16 --- a/arch/arm/mach-s3c2440/mach-gta02.c
  17 +++ b/arch/arm/mach-s3c2440/mach-gta02.c
  18 @@ -872,14 +872,14 @@ static struct s3c2410_nand_set gta02_nand_sets[] = {
  19         },
  20  };
  21
  22 -/* choose a set of timings which should suit most 512Mbit
  23 - * chips and beyond.
  24 +/* choose a set of timings derived from S3C@2442B MCP54
  25 + * data sheet (K5D2G13ACM-D075 MCP Memory)
  26   */
  27
  28  static struct s3c2410_platform_nand gta02_nand_info = {
  29 -       .tacls          = 20,
  30 -       .twrph0         = 60,
  31 -       .twrph1         = 20,
  32 +       .tacls          = 0,
  33 +       .twrph0         = 25,
  34 +       .twrph1         = 15,
  35         .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
  36         .sets           = gta02_nand_sets,
  37         .software_ecc   = 1,
  38 --
  39 1.5.6.5
  40