mtd: spi-nor: read 6 bytes for the ID

Currently, we read 5 bytes for ID, but s25fl128s has the same ext_id(0x4d01)
with s25fl129p1. The s25fl128s can support the DDR Quad read, while s25fl129p1
does not. So we have to distinguish the two NOR flashs.

This patch reads out 6 bytes for the ID, and use the 6 bytes ID to search the
right flash_info.

The detail of the patch is:
[1] change the "ext_id" from u16 to u32.
We can store two bytes or three bytes with the @ext_id now.

[2] search the right flash_info with the 6byte ID and the new @ext_id.
We use "matched" variable to track the legacy two bytes @ext_id.
If the flash_info's @ext_id is three bytes, we will use the
sixth byte of the ID to check it.

[3] add the new item to spi_nor_ids for s25fl128s.

Signed-off-by: Huang Shijie <b32955@freescale.com>
The upstream link of this patch: http://patchwork.ozlabs.org/patch/353244/
Change-Id: Id27774eefbf9e1a8f80e1dcd8fb0d3f9363923c1
Reviewed-on: http://git.am.freescale.net:8181/20134
Reviewed-by: Zhengxiong Jin <Jason.Jin@freescale.com>
Tested-by: Zhengxiong Jin <Jason.Jin@freescale.com>

0 files changed, 0 insertions, 0 deletions