Re: [PATCH 1/3] mtd: spi-nor: add Global Block Unlock support

[Tudor.Ambarus]

On 07/17/2018 07:28 PM, Tudor Ambarus wrote:
> We can't determine this purely by manufacturer type and it's not
> autodetectable by anything like SFDP, so make a new flag for it:
> UNLOCK_GLOBAL_BLOCK.
> 
> Note that the Global Block Unlock command has different names
> depending on the manufacturer, but always the same command value:
> 0x98. Macronix's MX25U12835F names it Gang Block Unlock,
> Winbound's W25Q128FV names it Global Block Unlock and
> Microchip's SST26VF064B names it Global Block Protection Unlock.
> 
> Based on initial work done by Anurag Kumar Vulisha:
> https://patchwork.kernel.org/patch/7611271/

Time passed and now I think that this should be part of the individual block
lock support, as an optimization when one wants to unlock the entire flash
memory. Will rework it.

Cheers,
ta