target/linux/layerscape/patches-5.4/303-core-0005-nand-raw-workaround-for-EDO-high-speed-mode.patch

   1 From e2c1ef18cddb426b9eea79599aec892717bead48 Mon Sep 17 00:00:00 2001
   2 From: Han Xu <han.xu@nxp.com>
   3 Date: Thu, 15 Aug 2019 21:45:50 -0500
   4 Subject: [PATCH] nand: raw: workaround for EDO high speed mode
   5
   6 Found issue for EDO high speed mode, set to low speed mode as a
   7 workaround.
   8
   9 Signed-off-by: Han Xu <han.xu@nxp.com>
  10 ---
  11  drivers/mtd/nand/raw/nand_base.c | 3 ++-
  12  1 file changed, 2 insertions(+), 1 deletion(-)
  13
  14 --- a/drivers/mtd/nand/raw/nand_base.c
  15 +++ b/drivers/mtd/nand/raw/nand_base.c
  16 @@ -940,7 +940,8 @@ static int nand_init_data_interface(stru
  17                 modes = GENMASK(chip->onfi_timing_mode_default, 0);
  18         }
  19
  20 -       for (mode = fls(modes) - 1; mode >= 0; mode--) {
  21 +       /* for (mode = fls(modes) - 1; mode >= 0; mode--) { */
  22 +       for (mode = 1; mode >= 0; mode--) {
  23                 ret = onfi_fill_data_interface(chip, NAND_SDR_IFACE, mode);
  24                 if (ret)
  25                         continue;