lkml.org 
[lkml]   [2015]   [Apr]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH 3/3] MTD: spi-nor: add flag to not use sector erase.
Date
On Thursday, April 30, 2015 at 11:13:12 PM, Michal Suchanek wrote:
> The sector size of the flash memory is unclear from datasheet or may
> possibly vary between chips so add a flag to always use 4k blocks.
>
> Currently 4k blocks are always used when possible but in the future
> somebody might want to do some optimizations with sector erase.
>
> Signed-off-by: Michal Suchanek <hramrach@gmail.com>

I _think_ you might be able to determine the size, no ?

One way is to ask the vendor, but you can also try something like:
1) erase the whole SPI NOR
2) overwrite it with zeroes (or ones ? I think it should be all ones after
erasing).
3) Erase sector 0
4) Read some 128 KiB back
5) Observe what is the difference.

Best regards,
Marek Vasut


\
 
 \ /
  Last update: 2015-05-01 01:21    [W:0.107 / U:0.448 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site