Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
MIME-Version: 1.0
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>
From:   Bartosz Golaszewski <brgl@bgdev.pl>
Date:   Mon, 20 Aug 2018 20:50:55 +0200
Message-ID: <CAMRc=McwEjofZKP93DxPa8vJLE6NceLLGfcbcK9-Pfk-dav_Zg@mail.gmail.com>
Subject: Re: [PATCH v2 06/29] mtd: Add support for reading MTD devices via the
 nvmem API
To:     Boris Brezillon <boris.brezillon@bootlin.com>
Cc:     Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
        Alban <albeu@free.fr>, 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 <linux-doc@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        linux-i2c <linux-i2c@vger.kernel.org>,
        "open list:MEMORY TECHNOLOGY..." <linux-mtd@lists.infradead.org>,
        Linux-OMAP <linux-omap@vger.kernel.org>,
        netdev <netdev@vger.kernel.org>,
        Bartosz Golaszewski <bgolaszewski@baylibre.com>
Content-Type: text/plain; charset="UTF-8"
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

2018-08-20 20:20 GMT+02:00 Boris Brezillon <boris.brezillon@bootlin.com>:
> On Mon, 20 Aug 2018 11:43:34 +0100
> Srinivas Kandagatla <srinivas.kandagatla@linaro.org> wrote:
>
>>
>> Overall am still not able to clear visualize on how MTD bindings with
>> nvmem cells would look in both partition and un-partition usecases?
>> An example DT would be nice here!!
>
> Something along those lines:
>
>         mtdnode {
>                 nvmem-cells {
>                         #address-cells = <1>;
>                         #size-cells = <1>;
>
>                         cell@0 {
>                                 reg = <0x0 0x14>;
>                         };
>                 };
>
>                 partitions {
>                         compatible = "fixed-partitions";
>                         #address-cells = <1>;
>                         #size-cells = <1>;
>
>                         partition@0 {
>                                 reg = <0x0 0x20000>;
>
>                                 nvmem-cells {
>                                         #address-cells = <1>;
>                                         #size-cells = <1>;
>
>                                         cell@0 {
>                                                 reg = <0x0 0x10>;
>                                         };
>                                 };
>                         };
>                 };
>         };

If there'll be an agreement on the bindings: will you be willing to
merge Alban's patch even without support in the code for the above
(with the assumption that it will be added later)? My use-case is on
non-DT systems and creating nvmem devices corresponding to MTD
partitions if fine by me. I also don't have the means to test the
support for these bindings if I were to actually write them myself.

Best regards,
Bartosz Golaszewski