Re: Exposing NAND chip information

[Florian Fainelli <ffainelli@freebox.fr>]

Hi,

On Sunday 15 April 2012 23:20:25 Tom Isaacson wrote:
> Hi,
> 
> Our production software needs to record the NAND chip type used in
> production so we have a record in case we get problems later. The
> information we need is printed out by nand_get_flash_type(), e.g.: NAND
> device: Manufacturer ID: 0x98, Chip ID: 0xd1 (Toshiba NAND 128MiB 3,3V
> 8-bit) My plan is to add some files to the /sys tree to expose this
> information. But the only part of that information stored is the device
> name, in mtd_info.name. Is there any reason why I shouldn't add the
> manufacturer name and ID and the chip ID to mtd_info so they can be
> accessed later on? Or should I add them to mxd_mtd_s (in nand_base.c) and
> keep it local?
> 
> Also, when I add the files to the /sys tree is there any naming convention I
> should follow? I was going to copy the way the eMMC device does it: manfid
> - Manufacturer ID
>   devid - Chip ID
>   manf_name - Manufacturer name
>   dev_name - Chip name

I have the exact same requirement and cooked up a patch to do this for NAND:
http://patchwork.ozlabs.org/patch/94407/

however, to be complete it would also need to expose such informations for SPI 
and NOR flashes, which I have not done yet.
--
Florian