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Date:   Mon, 20 Aug 2018 23:27:48 +0200
From:   Alban <albeu@free.fr>
To:     Boris Brezillon <boris.brezillon@bootlin.com>
Cc:     Aban Bedel <albeu@free.fr>,
        Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
        Bartosz Golaszewski <brgl@bgdev.pl>,
        Jonathan Corbet <corbet@lwn.net>, Sekhar Nori <nsekhar@ti.com>,
        Kevin Hilman <khilman@kernel.org>,
        Russell King <linux@armlinux.org.uk>,
        Arnd Bergmann <arnd@arndb.de>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        David Woodhouse <dwmw2@infradead.org>,
        Brian Norris <computersforpeace@gmail.com>,
        Marek Vasut <marek.vasut@gmail.com>,
        Richard Weinberger <richard@nod.at>,
        Grygorii Strashko <grygorii.strashko@ti.com>,
        "David S . Miller" <davem@davemloft.net>,
        Naren <naren.kernel@gmail.com>,
        Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Lukas Wunner <lukas@wunner.de>,
        Dan Carpenter <dan.carpenter@oracle.com>,
        Florian Fainelli <f.fainelli@gmail.com>,
        Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>,
        Sven Van Asbroeck <svendev@arcx.com>,
        Paolo Abeni <pabeni@redhat.com>, Rob Herring <robh@kernel.org>,
        David Lechner <david@lechnology.com>,
        Andrew Lunn <andrew@lunn.ch>, linux-doc@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-i2c@vger.kernel.org, linux-mtd@lists.infradead.org,
        linux-omap@vger.kernel.org, netdev@vger.kernel.org,
        Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: Re: [PATCH v2 06/29] mtd: Add support for reading MTD devices via
 the nvmem API
Message-ID: <20180820232748.608c3667@tock>
In-Reply-To: <20180820202038.5d3dc195@bbrezillon>
References: <20180810080526.27207-1-brgl@bgdev.pl>
        <20180810080526.27207-7-brgl@bgdev.pl>
        <20180817182720.6a6e5e8e@bbrezillon>
        <20180819133106.0420df5f@tock>
        <20180819184609.6dcdbb9a@bbrezillon>
        <5b8c30b8-41e1-d59e-542b-fef6c6469ff0@linaro.org>
        <20180820202038.5d3dc195@bbrezillon>
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On Mon, 20 Aug 2018 20:20:38 +0200
Boris Brezillon <boris.brezillon@bootlin.com> wrote:

> On Mon, 20 Aug 2018 11:43:34 +0100
> Srinivas Kandagatla <srinivas.kandagatla@linaro.org> wrote:
>=20
> >=20
> > Overall am still not able to clear visualize on how MTD bindings with=20
> > nvmem cells would look in both partition and un-partition usecases?
> > An example DT would be nice here!! =20
>=20
> Something along those lines:

We must also have a compatible string on the nvmem-cells node to make
sure we don't clash with the old style MTD partitions, or some other
device specific binding.

>=20
> 	mtdnode {
> 		nvmem-cells {
                        compatible =3D "nvmem-cells";
> 			#address-cells =3D <1>;
> 			#size-cells =3D <1>;
>=20
> 			cell@0 {
> 				reg =3D <0x0 0x14>;
> 			};
> 		};
>=20
> 		partitions {
> 			compatible =3D "fixed-partitions";
> 			#address-cells =3D <1>;
> 			#size-cells =3D <1>;
>=20
> 			partition@0 {
> 				reg =3D <0x0 0x20000>;
>=20
> 				nvmem-cells {
                                        compatible =3D "nvmem-cells";
> 					#address-cells =3D <1>;
> 					#size-cells =3D <1>;
>=20
> 					cell@0 {
> 						reg =3D <0x0 0x10>;
> 					};
> 				};
> 			};
> 		};
> 	};


Alban

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