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mtd: spi-nor: spansion: Enable JFFS2 write buffer for S25FS256T 

Infineon(Cypress) SEMPER NOR flash family has on-die ECC and its program
granularity is 16-byte ECC data unit size. JFFS2 supports write buffer
mode for ECC'd NOR flash. Provide a way to clear the MTD_BIT_WRITEABLE
flag in order to enable JFFS2 write buffer mode support. Drop the
comment as the same info is now specified in cypress_nor_ecc_init().

Fixes: 6afcc84080 ("mtd: spi-nor: spansion: Add support for Infineon S25FS256T")
Suggested-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Signed-off-by: Takahiro Kuwano <Takahiro.Kuwano@infineon.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/641bfb26c6e059915ae920117b7ec278df1a6f0a.1680760742.git.Takahiro.Kuwano@infineon.com
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
This commit is contained in:
Takahiro Kuwano 2023-04-06 15:17:46 +09:00 committed by Tudor Ambarus
parent 4199c1719e
commit a9180c298d
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1 changed files with 1 additions and 7 deletions
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8
drivers/mtd/spi-nor/spansion.c
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@ -384,13 +384,7 @@ static void s25fs256t_post_sfdp_fixup(struct spi_nor *nor)
static void s25fs256t_late_init(struct spi_nor *nor)
{
/*
* Programming is supported only in 16-byte ECC data unit granularity.
* Byte-programming, bit-walking, or multiple program operations to the
* same ECC data unit without an erase are not allowed. See chapter
* 5.3.1 and 5.6 in the datasheet.
*/
nor->params->writesize = 16;
cypress_nor_ecc_init(nor);
}
static struct spi_nor_fixups s25fs256t_fixups = {