[U-Boot] [PATCH v3 6/8] mtd: nand: add driver for diskonchip g4 nand flash

[Scott Wood]

On 04/12/2013 01:59:18 PM, Mike Dunn wrote:
> This patch adds a driver for the diskonchip G4 nand flash device.  It  
> is based
> on the driver from the linux kernel.
> 
> This also includes a separate SPL driver.  A separate SPL driver is  
> used because
> the device operates in a different mode (reliable mode) when loading  
> a boot
> image, and also because the storage format of the boot image is  
> different from
> normal data (pages are stored redundantly).  The SPL driver basically  
> mimics how
> a typical IPL reads data from the device.  The special operating mode  
> and
> storage format are used to compensate for the fact that the IPL does  
> not contain
> the BCH ecc decoding algorithm (due to size constraints).  Although  
> the u-boot
> SPL *could* use ecc, it operates like an IPL for the sake of  
> simplicity and
> uniformity, since the IPL and SPL share the task of loading the  
> u-boot image.
> As a side benefit, the SPL driver is very small.
> 
> [port from linux kernel 3.4 commit  
> 570469f3bde7f71cc1ece07a18d54a05b6a8775d]
> 
> Signed-off-by: Mike Dunn <mikedunn at newsguy.com>
> ---
> Changelog:
>   v3: replace dbg macro with MTDDEBUG
>   v2: remove commented-out code
> 
>  drivers/mtd/nand/Makefile    |    2 +
>  drivers/mtd/nand/docg4.c     | 1028  
> ++++++++++++++++++++++++++++++++++++++++++
>  drivers/mtd/nand/docg4_spl.c |  222 +++++++++
>  include/linux/mtd/docg4.h    |  134 ++++++
>  4 files changed, 1386 insertions(+), 0 deletions(-)
>  create mode 100644 drivers/mtd/nand/docg4.c
>  create mode 100644 drivers/mtd/nand/docg4_spl.c
>  create mode 100644 include/linux/mtd/docg4.h

Acked-by: Scott Wood <scottwood at freescale.com>

-Scott