Unverified Commit a9180c29 authored by Takahiro Kuwano's avatar Takahiro Kuwano Committed by Tudor Ambarus
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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: 6afcc840 ("mtd: spi-nor: spansion: Add support for Infineon S25FS256T")
Suggested-by: default avatarTudor Ambarus <tudor.ambarus@linaro.org>
Signed-off-by: default avatarTakahiro 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: default avatarTudor Ambarus <tudor.ambarus@linaro.org>
parent 4199c171

drivers/mtd/spi-nor/spansion.c

+1 −7
Original line number Diff line number Diff line
@@ -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 = {