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[MTD] Introduce MTD_BIT_WRITEABLE

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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>
This commit is contained in:
Joern Engel
2006-05-22 23:18:29 +02:00
parent c8b229de2b
commit 5fa433942b
6 changed files with 9 additions and 13 deletions
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include/mtd/mtd-abi.h
+3 -4
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@@ -30,14 +30,13 @@ struct mtd_oob_buf {
#define MTD_NANDFLASH 4
#define MTD_DATAFLASH 6
#define MTD_ECC 128 // Device capable of automatic ECC
#define MTD_PROGRAM_REGIONS 512 // Configurable Programming Regions
#define MTD_WRITEABLE 0x400 /* Device is writeable */
#define MTD_BIT_WRITEABLE 0x800 /* Single bits can be flipped */
// Some common devices / combinations of capabilities
#define MTD_CAP_ROM 0
#define MTD_CAP_RAM (MTD_WRITEABLE)
#define MTD_CAP_NORFLASH (MTD_WRITEABLE)
#define MTD_CAP_RAM (MTD_WRITEABLE | MTD_BIT_WRITEABLE)
#define MTD_CAP_NORFLASH (MTD_WRITEABLE | MTD_BIT_WRITEABLE)
#define MTD_CAP_NANDFLASH (MTD_WRITEABLE)