diff options
| author | Masahiro Yamada | 2017-11-22 02:38:30 +0900 |
|---|---|---|
| committer | Masahiro Yamada | 2017-11-29 00:28:59 +0900 |
| commit | a01549ba404a33636755473ea614d7e59bd525de (patch) | |
| tree | 28cc65b3c62d7efafd31c9b100ceac72a31da25b | |
| parent | 470c29d1c28d23bdd86456bc431b8f26f8727903 (diff) | |
mtd: nand: add a shorthand to generate nand_ecc_caps structure
struct nand_ecc_caps was designed as flexible as possible to support
multiple stepsizes (like sunxi_nand.c).
So, we need to write multiple arrays even for the simplest case.
I guess many controllers support a single stepsize, so here is a
shorthand macro for the case.
It allows to describe like ...
NAND_ECC_CAPS_SINGLE(denali_pci_ecc_caps, denali_calc_ecc_bytes, 512, 8, 15);
... instead of
static const int denali_pci_ecc_strengths[] = {8, 15};
static const struct nand_ecc_step_info denali_pci_ecc_stepinfo = {
.stepsize = 512,
.strengths = denali_pci_ecc_strengths,
.nstrengths = ARRAY_SIZE(denali_pci_ecc_strengths),
};
static const struct nand_ecc_caps denali_pci_ecc_caps = {
.stepinfos = &denali_pci_ecc_stepinfo,
.nstepinfos = 1,
.calc_ecc_bytes = denali_calc_ecc_bytes,
};
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
[Linux commit: a03c60178c181767ecfb26fb311a88742d228118]
| -rw-r--r-- | include/linux/mtd/nand.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 2d5f9a49071..150e3b8c8c5 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -511,6 +511,20 @@ struct nand_ecc_caps { int (*calc_ecc_bytes)(int step_size, int strength); }; +/* a shorthand to generate struct nand_ecc_caps with only one ECC stepsize */ +#define NAND_ECC_CAPS_SINGLE(__name, __calc, __step, ...) \ +static const int __name##_strengths[] = { __VA_ARGS__ }; \ +static const struct nand_ecc_step_info __name##_stepinfo = { \ + .stepsize = __step, \ + .strengths = __name##_strengths, \ + .nstrengths = ARRAY_SIZE(__name##_strengths), \ +}; \ +static const struct nand_ecc_caps __name = { \ + .stepinfos = &__name##_stepinfo, \ + .nstepinfos = 1, \ + .calc_ecc_bytes = __calc, \ +} + /** * struct nand_ecc_ctrl - Control structure for ECC * @mode: ECC mode |