linux-kernel - Re: [PATCH] ARM: /proc/cpuinfo: Use DT machine name when possible

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Message-ID: <20141204105908.GM11285@n2100.arm.linux.org.uk>
Date:	Thu, 4 Dec 2014 10:59:08 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Rob Herring <robherring2@...il.com>
Cc:	Pali Rohár <pali.rohar@...il.com>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	Will Deacon <will.deacon@....com>,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
	Sebastian Reichel <sre@...ian.org>,
	Pavel Machek <pavel@....cz>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] ARM: /proc/cpuinfo: Use DT machine name when possible

On Wed, Dec 03, 2014 at 06:33:08PM -0600, Rob Herring wrote:
> On Mon, Nov 24, 2014 at 4:19 PM, Pali Rohár <pali.rohar@...il.com> wrote:
> > There is no "/serial-number" property in kernel:
> >
> > $ ls -l -a /sys/bus/soc/devices/soc0/
> > drwxr-xr-x    3 0        0                0 Jan  1 00:00 .
> > drwxr-xr-x   18 0        0                0 Jan  1 00:00 ..
> > -r--r--r--    1 0        0             4096 Jan  1 00:00 family
> > -r--r--r--    1 0        0             4096 Jan  1 00:00 machine
> > drwxr-xr-x    2 0        0                0 Jan  1 00:00 power
> > -r--r--r--    1 0        0             4096 Jan  1 00:00 revision
> > lrwxrwxrwx    1 0        0                0 Jan  1 00:00
> > subsystem -> ../../bus/soc
> > -r--r--r--    1 0        0             4096 Jan  1 00:00 type
> > -rw-r--r--    1 0        0             4096 Jan  1 00:00 uevent
> 
> Wrong place. If you put /serial-number in your DT, then it will be in
> /proc/device-tree/serial-number.
> 
> If you want to wire that up to /proc/cpuinfo, I would be fine with that.

That would be fine for me too.  Then it's just a matter of how to copy
the contents of the ATAG into the DT (I assume it's possible in a
similar way to the memory and command line information.)  That's
something I know nothing about though.

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