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| author | Miquel Raynal <miquel.raynal@bootlin.com> | 2020-05-19 09:45:45 +0200 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2020-05-24 22:34:55 +0200 |
| commit | d7904619ea0636411f40fb1f34057288c0783ecf (patch) | |
| tree | 4f60bc86a5fee1ebabd8c2d0eb3c2ddcb60d5d05 /include/linux/mtd/rawnand.h | |
| parent | 0651ed5082bc5af45be9f79cabcbc32c1cf4e599 (diff) | |
| download | linux-d7904619ea0636411f40fb1f34057288c0783ecf.tar.bz2 | |
mtd: rawnand: Add nand_extract_bits()
There are cases where ECC bytes are not byte-aligned. Indeed, BCH
implies using a number of ECC bits, which are not always a multiple of
8. We then need a helper like nand_extract_bits() to extract these
syndromes from a buffer.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Link: https://lore.kernel.org/linux-mtd/20200519074549.23673-5-miquel.raynal@bootlin.com
Diffstat (limited to 'include/linux/mtd/rawnand.h')
| -rw-r--r-- | include/linux/mtd/rawnand.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h index a3bac8824937..2804c13e5662 100644 --- a/include/linux/mtd/rawnand.h +++ b/include/linux/mtd/rawnand.h @@ -1414,6 +1414,10 @@ int nand_gpio_waitrdy(struct nand_chip *chip, struct gpio_desc *gpiod, void nand_select_target(struct nand_chip *chip, unsigned int cs); void nand_deselect_target(struct nand_chip *chip); +/* Bitops */ +void nand_extract_bits(u8 *dst, unsigned int dst_off, const u8 *src, + unsigned int src_off, unsigned int nbits); + /** * nand_get_data_buf() - Get the internal page buffer * @chip: NAND chip object |