[MTD] [NOR] Fixup for Numonyx M29W128 chips

Prevent NUMONYX M29W128G memories from using write buffer,
because it doesn't work properly.

Signed-off-by: Darius Augulis <augulis.darius@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index 94bb61e19047..61ea833e0908 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -282,6 +282,16 @@ static void fixup_s29gl032n_sectors(struct mtd_info *mtd, void *param)
         }
 }
 
+static void fixup_M29W128G_write_buffer(struct mtd_info *mtd, void *param)
+{
+        struct map_info *map = mtd->priv;
+        struct cfi_private *cfi = map->fldrv_priv;
+        if (cfi->cfiq->BufWriteTimeoutTyp) {
+                pr_warning("Don't use write buffer on ST flash M29W128G\n");
+                cfi->cfiq->BufWriteTimeoutTyp = 0;
+        }
+}
+
 static struct cfi_fixup cfi_fixup_table[] = {
         { CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri, NULL },
 #ifdef AMD_BOOTLOC_BUG
@@ -298,6 +308,7 @@ static struct cfi_fixup cfi_fixup_table[] = {
         { CFI_MFR_AMD, 0x1301, fixup_s29gl064n_sectors, NULL, },
         { CFI_MFR_AMD, 0x1a00, fixup_s29gl032n_sectors, NULL, },
         { CFI_MFR_AMD, 0x1a01, fixup_s29gl032n_sectors, NULL, },
+        { CFI_MFR_ST,  0x227E, fixup_M29W128G_write_buffer, NULL, },
 #if !FORCE_WORD_WRITE
         { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL, },
 #endif