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mtd: nand: mxs check maximum ecc that platfrom supports

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Check maximum ecc strength for each platfrom to avoid the calculated ecc
exceed the limitation.

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Signed-off-by: Han Xu <b45815@freescale.com>
Tested-By: Tim Harvey <tharvey at gateworks.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Acked-by: Scott Wood <scottwood@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Peng Fan 2015-09-07 16:12:11 +08:00 committed by Stefano Babic
parent 8e4ba5e0ff
commit 168617c9b5
1 changed files with 8 additions and 1 deletions
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9
drivers/mtd/nand/mxs_nand.c
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@ -149,6 +149,13 @@ static inline uint32_t mxs_nand_get_ecc_strength(uint32_t page_data_size,
uint32_t page_oob_size)
{
int ecc_strength;
int max_ecc_strength_supported;
/* Refer to Chapter 17 for i.MX6DQ, Chapter 18 for i.MX6SX */
if (is_cpu_type(MXC_CPU_MX6SX))
max_ecc_strength_supported = 62;
else
max_ecc_strength_supported = 40;
/*
* Determine the ECC layout with the formula:
@ -162,7 +169,7 @@ static inline uint32_t mxs_nand_get_ecc_strength(uint32_t page_data_size,
/ (galois_field *
mxs_nand_ecc_chunk_cnt(page_data_size));
return round_down(ecc_strength, 2);
return min(round_down(ecc_strength, 2), max_ecc_strength_supported);
}
static inline uint32_t mxs_nand_get_mark_offset(uint32_t page_data_size,