From a8f2d0e6757c8f5391113582d8fecad29dc8cedc Mon Sep 17 00:00:00 2001 From: Elie De Brauwer Date: Sat, 24 Aug 2013 16:51:24 +0200 Subject: [PATCH] mxs_nand: Fix ECC strength for NAND flash with OOB size of 224 On a board with an i.mx28 and a Micron MT29F4G08ABAEAH4, Linux says: NAND device: Manufacturer ID: 0x2c, Chip ID: 0xdc (Micron MT29F4G08ABAEAH4), 512MiB, page size: 4096, OOB size: 224) the ECC strength is 16. root@(none):/sys/devices/virtual/mtd/mtd0# for i in ecc_strength oobsize subpagesize; do echo $i = `cat $i`; done ecc_strength = 16 oobsize = 224 subpagesize = 4096 The ECC strength was not properly discovered by U-Boot causing the data written by Linux to return an -74 (EBADMSG) when read from U-Boot. This patch fixes mxs_nand_get_ecc_strength() to function in case of a NAND flash with page_data_size = 4096 and page_oob_size= 224. Signed-off-by: Elie De Brauwer Acked-by: Scott Wood --- drivers/mtd/nand/mxs_nand.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/mtd/nand/mxs_nand.c b/drivers/mtd/nand/mxs_nand.c index 378f8c513a..036c113ad3 100644 --- a/drivers/mtd/nand/mxs_nand.c +++ b/drivers/mtd/nand/mxs_nand.c @@ -155,6 +155,9 @@ static inline uint32_t mxs_nand_get_ecc_strength(uint32_t page_data_size, if (page_oob_size == 218) return 16; + + if (page_oob_size == 224) + return 16; } return 0; -- 2.25.1