linux-kernel - Re: [PATCH] mtd: m25p80: Use CFI to identify unknown flash chips

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Date:	Thu, 12 May 2011 14:49:17 +0300
From:	Artem Bityutskiy <dedekind1@...il.com>
To:	Kevin Cernekee <cernekee@...il.com>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mtd: m25p80: Use CFI to identify unknown flash chips

On Sun, 2011-05-08 at 16:16 -0700, Kevin Cernekee wrote:
> Many of the newer SPI flash devices support both JEDEC and CFI queries.
> While JEDEC RDID only returns the device ID, CFI provides the device
> size, eraseblock size, and other information.  In some cases this may
> allow previously unknown devices to be supported without adding yet
> another entry to m25p_ids[].
> 
> This patch replaces jedec_probe() with a new cfi_probe() function.  The
> existing JEDEC probe/match logic is attempted first, and CFI is only used
> if no match is found.
> 
> Additionally, platform_data.type may now specify "auto", which instructs
> m25p80.c to autodetect the chip type rather than trying to match a
> specific entry.  In some situations, board manufacturers have multiple
> sources for flash parts (usually with identical geometries), but do not
> know in advance which specific part will be used on a given board.  The
> "auto" parameter allows the BSP to indicate this to the driver, so that
> the driver does not warn the user about a flash device mismatch.
> 
> Signed-off-by: Kevin Cernekee <cernekee@...il.com>
> ---
>  drivers/mtd/devices/m25p80.c |  181 ++++++++++++++++++++++++++++--------------
>  1 files changed, 121 insertions(+), 60 deletions(-)

Could you please send a patch which cleanly applies to l2-mtd-2.6.git?

-- 
Best Regards,
Artem Bityutskiy (Артём Битюцкий)

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