Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754641Ab3EQDhn (ORCPT ); Thu, 16 May 2013 23:37:43 -0400 Received: from [207.46.163.28] ([207.46.163.28]:25451 "EHLO co9outboundpool.messaging.microsoft.com" rhost-flags-FAIL-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1753792Ab3EQDf1 (ORCPT ); Thu, 16 May 2013 23:35:27 -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(z3121kzzz1f42h1ee6h1de0h1fdah1202h1e76h1d1ah1d2ah1fc6h1082kzz8275bhz2dh2a8h668h839hd24he5bhf0ah1288h12a5h12a9h12bdh12e5h137ah139eh13b6h1441h1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1ad9h1b0ah1d0ch1d2eh1d3fh1155h) From: Huang Shijie To: CC: , , , , , Huang Shijie Subject: [PATCH v6 07/10] mtd: add ECC info for nand_flash_dev{} Date: Fri, 17 May 2013 11:17:31 +0800 Message-ID: <1368760654-28754-8-git-send-email-b32955@freescale.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1368760654-28754-1-git-send-email-b32955@freescale.com> References: <1368760654-28754-1-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: 2125 Lines: 63 Add an instance of an anonymous struct to store the ECC infor for full id nand chips. @ecc.strength_ds: ECC correctability from the datasheet. @ecc.step_ds: ECC size required by the @ecc.strength_ds, These two fields are all from the datasheet. Also add the necessary macros to make the code simple and clean. Signed-off-by: Huang Shijie --- include/linux/mtd/nand.h | 15 +++++++++++++++ 1 files changed, 15 insertions(+), 0 deletions(-) diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 9574e0a..217cdfe 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -625,6 +625,11 @@ struct nand_chip { { .name = (nm), {{ .dev_id = (devid) }}, .chipsize = (chipsz), \ .options = (opts) } +#define NAND_ECC_INFO(_strength, _step) \ + { .strength_ds = (_strength), .step_ds = (_step) } +#define NAND_ECC_STRENGTH(type) ((type)->ecc.strength_ds) +#define NAND_ECC_STEP(type) ((type)->ecc.step_ds) + /** * struct nand_flash_dev - NAND Flash Device ID Structure * @name: a human-readable name of the NAND chip @@ -642,6 +647,12 @@ struct nand_chip { * @options: stores various chip bit options * @id_len: The valid length of the @id. * @oobsize: OOB size + * @ecc.strength_ds: The ECC correctability from the datasheet, same as the + * @ecc_strength_ds in nand_chip{}. + * @ecc.step_ds: The ECC step required by the @ecc.strength_ds, same as the + * @ecc_step_ds in nand_chip{}, also from the datasheet. + * For example, the "4bit ECC for each 512Byte" can be set with + * NAND_ECC_INFO(4, 512). */ struct nand_flash_dev { char *name; @@ -658,6 +669,10 @@ struct nand_flash_dev { unsigned int options; uint16_t id_len; uint16_t oobsize; + struct { + uint16_t strength_ds; + uint16_t step_ds; + } ecc; }; /** -- 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/