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mtd: pxa3xx_nand: Increase the initial chunk size

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The chunk size represents the size of the data chunks, which
is used by the controllers that allow to split transferred data.

However, the initial chunk size is used in a non-split way,
during device identification. Therefore, it must be large enough
for all the NAND commands issued during device identification.
This includes NAND_CMD_PARAM which was recently changed to
transfer up to 2048 bytes (for the redundant parameter pages).

Thus, the initial chunk size should be 2048 as well.

On Armada 370/XP platforms (NFCv2) booted without the keep-config
devicetree property, this commit fixes a timeout on the NAND_CMD_PARAM
command:

  [..]
  pxa3xx-nand f10d0000.nand: This platform can't do DMA on this device
  pxa3xx-nand f10d0000.nand: Wait time out!!!
  nand: device found, Manufacturer ID: 0x2c, Chip ID: 0x38
  nand: Micron MT29F8G08ABABAWP
  nand: 1024 MiB, SLC, erase size: 512 KiB, page size: 4096, OOB size: 224

This commit is taken from Linux:
'commit c7f00c29aa8'
("mtd: pxa3xx_nand: Increase the initial chunk size")

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Signed-off-by: Ofer Heifetz <oferh@marvell.com>
Reviewed-by: Igal Liberman <igall@marvell.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Ofer Heifetz 2018-08-29 11:56:06 +03:00 committed by Stefan Roese
parent 94488612cb
commit 6bbe7f681f
1 changed files with 1 additions and 1 deletions
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2
drivers/mtd/nand/pxa3xx_nand.c
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@ -1376,7 +1376,7 @@ static int pxa3xx_nand_scan(struct mtd_info *mtd)
goto KEEP_CONFIG;
/* Set a default chunk size */
info->chunk_size = 512;
info->chunk_size = PAGE_CHUNK_SIZE;
ret = pxa3xx_nand_sensing(host);
if (ret) {