[PATCH 1/3] mtd: m25p80: utilize dedicated 4-byte addressing commands

[Matthieu CASTET]

Marek Vasut a écrit :
> Dear Matthieu CASTET,
> 
>> What's funny is the other side work :
>>
>> you can have a ROM that use 4-byte mode with 3-byte or 2-byte device as
>> soon as the read command is the same. [1]
> 
> Well, all of these are crap design. The SPI flash shall be power-cycled if the 
> platform reboots no matter what exactly to prevent having it in undefined state.
> 
This side (ROM that use 4-byte mode with 3-byte or 2-byte device) is used to
avoid detection of the flash by the rom (no need to know if spi eeprom or spi nor).