Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932154Ab3DWJHs (ORCPT ); Tue, 23 Apr 2013 05:07:48 -0400 Received: from ch1ehsobe002.messaging.microsoft.com ([216.32.181.182]:27823 "EHLO ch1outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756079Ab3DWJGW (ORCPT ); Tue, 23 Apr 2013 05:06:22 -0400 X-Forefront-Antispam-Report: CIP:70.37.183.190;KIP:(null);UIP:(null);IPV:NLI;H:mail.freescale.net;RD:none;EFVD:NLI X-SpamScore: 6 X-BigFish: VS6(z3121kzzz1f42h1fc6h1ee6h1de0h1fdah1202h1e76h1d1ah1d2ah1082kzz8275bhz2dh2a8h668h839hd24he5bhf0ah1288h12a5h12a9h12bdh12e5h137ah139eh13b6h1441h1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1ad9h1b0ah1155h) From: Huang Shijie To: CC: , , , , Huang Shijie Subject: [PATCH V3 6/9] mtd: add a new field for ecc info in the nand_flash_dev{} Date: Tue, 23 Apr 2013 16:54:54 +0800 Message-ID: <1366707297-31309-7-git-send-email-b32955@freescale.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1366707297-31309-1-git-send-email-b32955@freescale.com> References: <1366707297-31309-1-git-send-email-b32955@freescale.com> MIME-Version: 1.0 Content-Type: text/plain X-OriginatorOrg: freescale.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1741 Lines: 53 Add the @ecc_info in the nand_flash_dev{}. The lower 16 bits are used to store the ECC bits, while the upper 16 bits are used to store the ECC data chunk size. Signed-off-by: Huang Shijie --- include/linux/mtd/nand.h | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-) diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 063e517..f4c7777 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -624,6 +624,10 @@ struct nand_chip { { .name = (nm), {{ .dev_id = (devid) }}, .chipsize = (chipsz), \ .options = (opts) } +#define NAND_ECC_INFO(strength, size) (((strength) << 16) | (size)) +#define NAND_ECC_STRENGTH(x) (((x) >> 16) & 0xffff) +#define NAND_ECC_SIZE(x) ((x) & 0xffff) + /** * struct nand_flash_dev - NAND Flash Device ID Structure * @name: a human-readable name of the NAND chip @@ -641,6 +645,11 @@ struct nand_chip { * @options: stores various chip bit options * @id_len: The valid length of the @id. * @oobsize: OOB size + * @ecc_info: The ECC information. + * lower 16 bits: store the ECC bits. + * upper 16 bits: store the ECC data chunk size. + * For example, the "4bit ECC for each 512Byte" can be set with + * NAND_ECC_INFO(4, 512) macro. */ struct nand_flash_dev { char *name; @@ -657,6 +666,7 @@ struct nand_flash_dev { unsigned int options; uint16_t id_len; uint16_t oobsize; + uint32_t ecc_info; }; /** -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/