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Date: Thu, 7 Mar 2013 18:49:22 +0800 From: Huang Shijie <b32955@...escale.com> To: <dwmw2@...radead.org> CC: <artem.bityutskiy@...ux.intel.com>, <computersforpeace@...il.com>, <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>, Huang Shijie <b32955@...escale.com> Subject: [PATCH V4 1/3] mtd: add new fields to nand_flash_dev{} As time goes on, we begin to meet the situation that we can not get enough information from some nand chips's id data. Take some Toshiba's nand chips for example. I have 4 Toshiba's nand chips in my hand: TC58NVG2S0F, TC58NVG3S0F, TC58NVG5D2, TC58NVG6D2 When we read these chips' datasheets, we will get the geometry of these chips: TC58NVG2S0F : 4096 + 224 TC58NVG3S0F : 4096 + 232 TC58NVG5D2 : 8192 + 640 TC58NVG6D2 : 8192 + 640 But we can not parse out the correct oob size for these chips from the id data. This patch adds some new fields to the nand_flash_dev{}: @id_len: the valid length of the id data. See the comments in nand_id_has_period() @oobsize: the oob size. Signed-off-by: Huang Shijie <b32955@...escale.com> --- include/linux/mtd/nand.h | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 591eeeb..f0a9d93 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -578,6 +578,8 @@ struct nand_chip { * @erasesize: eraseblock size in bytes (determined from the extended ID if 0) * @chipsize: total chip size in MiB * @options: stores various chip bit options + * @id_len: The valid length of the @id. + * @oobsize: OOB size */ struct nand_flash_dev { char *name; @@ -592,6 +594,8 @@ struct nand_flash_dev { unsigned long chipsize; unsigned long erasesize; unsigned long options; + unsigned long id_len; + unsigned long oobsize; }; /** -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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