diff mbox series

[v3,6/6] mtd: spi-nor: Set ECC unit size to MTD writesize in Infineon SEMPER flashes

Message ID 377d4d69bf45734c60e7d0ede3ea0c516a11e7c6.1728964655.git.Takahiro.Kuwano@infineon.com
State Accepted
Commit 10e75dd0bce34134df15f2c2d9251a919f6bcdc7
Delegated to: Tom Rini
Headers show
Series mtd: Make sure UBIFS does not do multi-pass page programming on flashes that don't support it | expand

Commit Message

Takahiro Kuwano Oct. 15, 2024, 4:08 a.m. UTC 
From: Takahiro Kuwano <Takahiro.Kuwano@infineon.com>

The Infineon SEMPER NOR flash family uses 2-bit ECC by default with each
ECC block being 16 bytes. Under this scheme multi-pass programming to an
ECC block is not allowed. Set the writesize to make sure multi-pass
programming is not attempted on the flash.

Acked-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Signed-off-by: Takahiro Kuwano <Takahiro.Kuwano@infineon.com>
---
 drivers/mtd/spi/spi-nor-core.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
diff mbox series

Patch

diff --git a/drivers/mtd/spi/spi-nor-core.c b/drivers/mtd/spi/spi-nor-core.c
index 46af9b4fe47..f5c9868bbca 100644
--- a/drivers/mtd/spi/spi-nor-core.c
+++ b/drivers/mtd/spi/spi-nor-core.c
@@ -3855,6 +3855,13 @@  static void s25_late_init(struct spi_nor *nor,
 			  struct spi_nor_flash_parameter *params)
 {
 	nor->setup = s25_s28_setup;
+
+	/*
+	 * 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.
+	 */
+	params->writesize = 16;
 }
 
 static int s25_s28_post_bfpt_fixup(struct spi_nor *nor,
@@ -4019,6 +4026,13 @@  static void s28hx_t_late_init(struct spi_nor *nor,
 {
 	nor->octal_dtr_enable = spi_nor_cypress_octal_dtr_enable;
 	nor->setup = s25_s28_setup;
+
+	/*
+	 * 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.
+	 */
+	params->writesize = 16;
 }
 
 static void s28hx_t_post_sfdp_fixup(struct spi_nor *nor,