linux-kernel - Re: [PATCH] mtd: Adding of_mtd_info_get to get mtd

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Message-ID: <20160516191407.1dbb3028@bbrezillon>
Date:	Mon, 16 May 2016 19:14:07 +0200
From:	Boris Brezillon <boris.brezillon@...e-electrons.com>
To:	Moritz Fischer <moritz.fischer@...us.com>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>,
	linux-mtd@...ts.infradead.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	moritz.fischer.private@...il.com
Subject: Re: [PATCH] mtd: Adding of_mtd_info_get to get mtd_info from
 devicetree

On Mon, 16 May 2016 09:30:10 -0700
Moritz Fischer <moritz.fischer@...us.com> wrote:

> Hi Boris,
> 
> On Mon, May 16, 2016 at 1:05 AM, Boris Brezillon
> <boris.brezillon@...e-electrons.com> wrote:
> 
> >> Here are a few questions (I'm assuming the netdev + MAC address case):
> >> - how would you link the net/PHY device to the MTD partition storing
> >>   the MAC address  
> 
> Well in my case I actually planned to use it with the OTP partition of my QSPI
> device using spi_nor_read_usr_prot_reg and friends and I just needed a way
> to get to the struct mtd_info from a child of my network device.
> 
> Right now the OTP 'partitions' are not really exposed to device tree afaik.
> Maybe that would be worthwhile to further look into? Maybe exposing
> (wrapping) that as nvmem
> would be the way to go?

I think so. Now that MTD partitions are defined in a 'partitions'
subnode (see MTD binding doc), we can define an 'otp-partitions'
subnode and define nvmem cells in there.


-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com