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Date: Tue, 20 Feb 2024 11:07:01 +0100
From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Marco Felsch <m.felsch@pengutronix.de>
Cc: Michael Walle <michael@walle.cc>, srinivas.kandagatla@linaro.org,
 gregkh@linuxfoundation.org, rafal@milecki.pl, linux-kernel@vger.kernel.org,
 kernel@pengutronix.de
Subject: Re: [RFC PATCH] nvmem: core: add sysfs cell write support
Message-ID: <20240220110701.5ac88fed@xps-13>
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Hi Marco,

> > > > Regarding UBI(FS) I'm not sure if this is required at all since you=
 have
> > > > an filesystem. IMHO nvmem-cells are very lowelevel and are not made=
 for
> > > > filesystem backed backends. =20
> >=20
> > I'm really talking about UBI, not UBIFS. UBI is just like MTD but
> > handles wear leveling. There is a pending series for enabling nvmem
> > cells on top of UBI. =20
>=20
> Cells on-top of a wear leveling device? Interesting, the cell-api is
> very lowlevel which means the specified cell will be at the exact same
> place on the hardware device as specified in the dts. How do you know
> that with wear leveling underneath the cell-api?

https://lore.kernel.org/lkml/cover.1702952891.git.daniel@makrotopia.org/

I haven't tested it though.

Thanks,
Miqu=C3=A8l