[MTD] Introduce MTD_BIT_WRITEABLE

o Add a flag MTD_BIT_WRITEABLE for devices that allow single bits to be
  cleared.
o Replace MTD_PROGRAM_REGIONS with a cleared MTD_BIT_WRITEABLE flag for
  STMicro and Intel Sibley flashes with internal ECC.  Those flashes
  disallow clearing of single bits, unlike regular NOR flashes, so the
  new flag models their behaviour better.
o Remove MTD_ECC.  After the STMicro/Sibley merge, this flag is only set
  and never checked.

Signed-off-by: Joern Engel <joern@wh.fh-wedel.de>

2 files changed, 2 insertions, 3 deletions

diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
index 35c3689bc5c1..0d435814aaa1 100644
--- a/drivers/mtd/chips/cfi_cmdset_0001.c
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -548,7 +548,7 @@ static int cfi_intelext_partition_fixup(struct mtd_info *mtd,
                         mtd->writesize = cfi->interleave << prinfo->ProgRegShift;
                         MTD_PROGREGION_CTRLMODE_VALID(mtd) = cfi->interleave * prinfo->ControlValid;
                         MTD_PROGREGION_CTRLMODE_INVALID(mtd) = cfi->interleave * prinfo->ControlInvalid;
-                        mtd->flags |= MTD_PROGRAM_REGIONS;
+                        mtd->flags &= ~MTD_BIT_WRITEABLE;
                         printk(KERN_DEBUG "%s: program region size/ctrl_valid/ctrl_inval = %d/%d/%d\n",
                                map->name, mtd->writesize,
                                MTD_PROGREGION_CTRLMODE_VALID(mtd),
diff --git a/drivers/mtd/chips/cfi_cmdset_0020.c b/drivers/mtd/chips/cfi_cmdset_0020.c
index d745285fccf8..fae70a5db540 100644
--- a/drivers/mtd/chips/cfi_cmdset_0020.c
+++ b/drivers/mtd/chips/cfi_cmdset_0020.c
@@ -238,8 +238,7 @@ static struct mtd_info *cfi_staa_setup(struct map_info *map)
         mtd->unlock = cfi_staa_unlock;
         mtd->suspend = cfi_staa_suspend;
         mtd->resume = cfi_staa_resume;
-        mtd->flags = MTD_CAP_NORFLASH;
-        mtd->flags |= MTD_PROGRAM_REGIONS; /* FIXME: Not all STMicro flashes have this */
+        mtd->flags = MTD_CAP_NORFLASH & ~MTD_BIT_WRITEABLE;
         mtd->writesize = 8; /* FIXME: Should be 0 for STMicro flashes w/out ECC */
         map->fldrv = &cfi_staa_chipdrv;
         __module_get(THIS_MODULE);