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mtd: nand: Create helpers to set/extract the ECC requirements

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Despite its current name, the eccreq field actually encodes both the
NAND requirements and the final ECC configuration. That works fine when
using on-die ECC since those 2 concepts match perfectly, but it starts
being a problem as soon as we use on-host ECC engines, where we're not
guaranteed to have a perfect match.

Let's hide the ECC requirements access behind helpers so we can later
split those 2 concepts. As the structures have not been clarified yet,
these helpers access the same internal variable as
nanddev_get_ecc_conf() for now.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20200827085208.16276-14-miquel.raynal@bootlin.com
This commit is contained in:
Miquel Raynal 2020-08-27 10:52:01 +02:00
parent 9a333a72c1
commit 3316c8e3ad
1 changed files with 24 additions and 0 deletions
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24
include/linux/mtd/nand.h
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@ -533,6 +533,30 @@ nanddev_get_ecc_conf(struct nand_device *nand)
return &nand->eccreq;
}
/**
* nanddev_get_ecc_requirements() - Extract the ECC requirements from a NAND
* device
* @nand: NAND device
*/
static inline const struct nand_ecc_props *
nanddev_get_ecc_requirements(struct nand_device *nand)
{
return &nand->eccreq;
}
/**
* nanddev_set_ecc_requirements() - Assign the ECC requirements of a NAND
* device
* @nand: NAND device
* @reqs: Requirements
*/
static inline void
nanddev_set_ecc_requirements(struct nand_device *nand,
const struct nand_ecc_props *reqs)
{
nand->eccreq = *reqs;
}
int nanddev_init(struct nand_device *nand, const struct nand_ops *ops,
struct module *owner);
void nanddev_cleanup(struct nand_device *nand);