[PATCH] MTD-NAND: Changes to read_page APIs to support NAND_ECC_HW_SYNDROME mode on TI DaVinci DM355

[Narnakaje, Snehaprabha]

Thomas,

> -----Original Message-----
> From: Thomas Gleixner [mailto:tglx at linutronix.de]
> Sent: Monday, April 06, 2009 7:08 PM
> To: Narnakaje, Snehaprabha
> Cc: linux-mtd at lists.infradead.org; linux-kernel at vger.kernel.org; davinci-
> linux-open-source at linux.davincidsp.com; Paulraj, Sandeep
> Subject: Re: [PATCH] MTD-NAND: Changes to read_page APIs to support
> NAND_ECC_HW_SYNDROME mode on TI DaVinci DM355
> 
> Sneha,
> 
> On Wed, 1 Apr 2009, nsnehaprabha at ti.com wrote:
> 
> Would you please care to CC the still caring but admittedly lazy and
> distracted maintainer on such patches ?

Who would that be?

Is the list below correct?

Steven J. Hill (sjhill at realitydiluted.com)
Thomas Gleixner (tglx at linuxtronix.de)
David Woodhouse (dwmw2 at infradead.org)

> 
> > From: Sneha Narnakaje <nsnehaprabha at ti.com>
> >
> > The NAND controller on TI DaVinci DM355 supports NAND devices with large
> page size (2K and 4K), but the HW ECC is handled for every 512byte
> read/write chunks. The current HW_SYNDROME read_page/write_page APIs in
> the NAND core (nand_base) use the "infix OOB" scheme. The core APIs
> overwrite NAND manufacturer's bad block meta data, thus complicating the
> jobs of non-Linux NAND programmers (end equipment manufacturering). These
> APIs also imply ECC protection for the prepad bytes, causing nand
> raw_write operations to fail.
> 
> Please use proper line breaks. 523 characters do not fit into a
> terminal.

OK.

Thanks
Sneha
 
> 
> Thanks,
> 
> 	tglx
> 
>