linux-kernel - Re: [PATCH] mtd: atmel_nand: increase chip

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Date:	Mon, 4 Aug 2014 14:17:37 -0700
From:	Brian Norris <computersforpeace@...il.com>
To:	Josh Wu <josh.wu@...el.com>
Cc:	Raphael Poggi <poggi.raph@...il.com>, dwmw2@...radead.org,
	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mtd: atmel_nand: increase chip_delay

On Wed, Jul 30, 2014 at 05:36:18PM +0800, Josh Wu wrote:
> On 7/29/2014 9:27 PM, Raphael Poggi wrote:
> >Some nand with 8k page size like Micron MT29F32G08ABAAAWP need more than 20us.
> >
> >Signed-off-by: Raphaël Poggi <poggi.raph@...il.com>
> >---
> >  drivers/mtd/nand/atmel_nand.c |    2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> >diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
> >index e321c56..77bd877 100644
> >--- a/drivers/mtd/nand/atmel_nand.c
> >+++ b/drivers/mtd/nand/atmel_nand.c
> >@@ -2099,7 +2099,7 @@ static int atmel_nand_probe(struct platform_device *pdev)
> >  	}
> >  	nand_chip->ecc.mode = host->board.ecc_mode;
> >-	nand_chip->chip_delay = 20;		/* 20us command delay time */
> >+	nand_chip->chip_delay = 40;		/* 40us command delay time */
> >  	if (host->board.bus_width_16)	/* 16-bit bus width */
> >  		nand_chip->options |= NAND_BUSWIDTH_16;
> 
> I just post a patch [1] days ago which does almost the same thing to
> support 4k-page nand flash.
> personally I am fine with your patch.
> 
> Brain, you only need to take care this patch. And drop my patch [1].
> 
> [1] http://patchwork.ozlabs.org/patch/372406/

OK, queued to l2-mtd.git/next. Thanks!

Brian
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