Re: [PATCH v2] mtd: spi-nor: winbond: Add support for W77Q51NW

[Marek Vasut]

On 7/28/25 8:32 AM, Michael Walle wrote:
> > > > I have limited supply of these devices, so OTP is untested. The flash
> > > > does have OTP registers, that's why the .otp entry is there. Why should
> > > > I remove it if the OTP registers are in the chip ?
> > >
> > > We only add tested features. I'm just the messenger here :o. Anyway,
> > > OTP is not really one-time-programmable here, you can write and
> > > erase it again as long as you don't lock it, if that was your
> > > concern.
> >
> > So how do I test the OTP without locking it ?
>
> flash_otp_{write,info,dump,erase}, just don't use flash_otp_lock.

Thanks. flash_otp_dump -u /dev/mtd0 returns zeroes, so I suspect the OTP 
is not working. The chip does work even without this entry and the 
content /sys/kernel/debug/spi-nor/spi0.0/capabilities and 
/sys/kernel/debug/spi-nor/spi0.0/params did not change, so I think the 
best way forward is to drop this patch, until I can figure out the OTP 
on this chip ?

--
Best regards,
Marek Vasut