netdev - Re: [PATCH v3 3/3] net: add MTD support to eth_platform_get_mac

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Message-ID: <20180720142831.GB1034@lunn.ch>
Date:   Fri, 20 Jul 2018 16:28:31 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     Sekhar Nori <nsekhar@...com>, Kevin Hilman <khilman@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Grygorii Strashko <grygorii.strashko@...com>,
        "David S . Miller" <davem@...emloft.net>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Lukas Wunner <lukas@...ner.de>, Rob Herring <robh@...nel.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>,
        David Lechner <david@...hnology.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-omap@...r.kernel.org, netdev@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH v3 3/3] net: add MTD support to
 eth_platform_get_mac_address()

On Thu, Jul 19, 2018 at 05:32:43PM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
> 
> MTD doesn't support nvmem yet. Some platforms use MTD to read the MAC
> address from SPI flash. If we want this function to generalize reading
> the MAC address, we need to separately try to use MTD.

How many board files are doing this? It is only worth generlizing if
there are a number of board files, all just pulling 6 bytes out from
the beginning of an MTD partition.

It is also normal to actually add a user of a new feature at the same
time as the new feature. It can be messy when it is across subsystem
boundaries, but please at least try.

    Andrew