Re: [PATCH v3 1/2] mtd: spi-nor: add support to non-uniform SFDP SPI NOR flash memories

[Boris Brezillon]

On Wed, 17 Oct 2018 09:07:24 +0200
Boris Brezillon <boris.brezillon@xxxxxxxxxxx> wrote:

> On Wed, 17 Oct 2018 02:07:43 +0000
> Yogesh Narayan Gaur <yogeshnarayan.gaur@xxxxxxx> wrote:
> 
> > >     
> > Actually there is no entry of s25fs512s in current spi-nor.c file.
> > For my connected flash part, jedec ID read points to s25fl512s. I
> > have asked my board team to confirm the name of exact connected flash
> > part. When I check the data sheet of s25fs512s, it also points to the
> > same Jedec ID information. { "s25fl512s",  INFO(0x010220, 0x4d00, 256
> > * 1024, 256, ....}
> > 
> > But as stated earlier, if I skip reading SFDP or read using 1-1-1
> > protocol then read are always correct. For 1-4-4 protocol read are
> > wrong and on further debugging found that Read code of 0x6C is being
> > send as opcode instead of 0xEC.
> > 
> > If I revert this patch, reads are working fine.  
> 
> Can you try with the following patch?
> 

Hm, nevermind. The problem is actually not related to 4B vs non-4B mode
but 1-1-4 vs 1-4-4 modes.