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mtd: nand: remove AG-AND support

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We have only one AG-AND driver and it was not touched since 2005. It looks
like AG-AND was not really make it to mass-production and can be considered
a dead technology.

Along with the AG-AND support, this patch removes the BBT_AUTO_REFRESH feature,
because the only user of this feature is AG-AND. And even though it is
implemented as a generic feature, I prefer to remove it because NAND flashes do
not really need it in this form.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Acked-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Artem Bityutskiy
2013-03-04 14:21:34 +02:00
committed by David Woodhouse
parent 02f57fe448
commit 14c6578683
4 changed files with 2 additions and 132 deletions
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16
include/linux/mtd/nand.h
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@@ -171,22 +171,6 @@ typedef enum {
#define NAND_CACHEPRG 0x00000008
/* Chip has copy back function */
#define NAND_COPYBACK 0x00000010
/*
* AND Chip which has 4 banks and a confusing page / block
* assignment. See Renesas datasheet for further information.
*/
#define NAND_IS_AND 0x00000020
/*
* Chip has a array of 4 pages which can be read without
* additional ready /busy waits.
*/
#define NAND_4PAGE_ARRAY 0x00000040
/*
* Chip requires that BBT is periodically rewritten to prevent
* bits from adjacent blocks from 'leaking' in altering data.
* This happens with the Renesas AG-AND chips, possibly others.
*/
#define BBT_AUTO_REFRESH 0x00000080
/*
* Chip requires ready check on read (for auto-incremented sequential read).
* True only for small page devices; large page devices do not support