[PATCH v5 07/21] mtd: rawnand: Create a new enumeration to describe OOB placement
From: Miquel Raynal <miquel.raynal@bootlin.com>
Date: 2020-05-14 17:21:43
Subsystem:
memory technology devices (mtd), nand flash subsystem, the rest · Maintainers:
Miquel Raynal, Richard Weinberger, Vignesh Raghavendra, Linus Torvalds
There is currently a confusion between the ECC type/mode/provider (eg. hardware, software, on-die or none) and the ECC bytes placement. Create a new enumeration to describe this placement. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com> --- drivers/mtd/nand/raw/nand_base.c | 4 ++++ include/linux/mtd/rawnand.h | 12 ++++++++++++ 2 files changed, 16 insertions(+)
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index c407fd15ad46..b84fb5e6ecbe 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c@@ -4967,6 +4967,10 @@ static const char * const nand_ecc_modes[] = { [NAND_ECC_ON_DIE] = "on-die", }; +static const char * const nand_ecc_placement[] = { + [NAND_ECC_PLACEMENT_INTERLEAVED] = "interleaved", +}; + static int of_get_nand_ecc_mode(struct device_node *np) { const char *pm;
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 4e0c75b1abc2..dc1b38fccfcf 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h@@ -92,6 +92,18 @@ enum nand_ecc_mode { NAND_ECC_ON_DIE, }; +/** + * enum nand_ecc_placement - NAND ECC placement + * @NAND_ECC_PLACEMENT_FREE: The driver can decide where to put ECC bytes. + * Default behavior is to put them at the end of the + * OOB area. + * @NAND_ECC_PLACEMENT_INTERLEAVED: Syndrome layout: interleave data and OOB. + */ +enum nand_ecc_placement { + NAND_ECC_PLACEMENT_FREE, + NAND_ECC_PLACEMENT_INTERLEAVED, +}; + enum nand_ecc_algo { NAND_ECC_UNKNOWN, NAND_ECC_HAMMING,
--
2.20.1
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