From: Baruch Siach <baruch@tkos.co.il>
To: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH 0/3] arm/imx: serial number / UID support
Date: Wed, 4 Aug 2010 09:46:41 +0300 [thread overview]
Message-ID: <20100804064641.GB17208@jasper.tkos.co.il> (raw)
In-Reply-To: <20100802120213.GC13044@game.jcrosoft.org>
Hi Jean-Christophe,
On Mon, Aug 02, 2010 at 02:02:13PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> serial number is more for board ref than CPU ref
> as you can easly read it from the register.
>
> So why pass it via the ATAG?
The point of the serial number ATAG is to uniquely identify the system.
Getting this unique ID from the CPU is as good as any other IMO. I'm not aware
of any other UID source on the mx25 3DS system. Besides, having the serial
number nicely listed in /proc/cpuinfo is far easier than reading registers.
Anyway, patches 1 and 2 in this series are useful on their own, I think. I
intend to use this functionality for our own board. I've added the mx25 3ds
two lines patch to justify the bloat :).
baruch
> Best Regards,
> J.
> On 14:58 Mon 02 Aug , Baruch Siach wrote:
> > This patch series adds support for the serial ATAG, and uses this functionality
> > to pass the i.MX25 chip UID as a serial number to the Linux kernel.
> >
> > Baruch Siach (3):
> > arm: add support for the serial ATAG
> > imx25: add support for UID read from eFuse
> > mx25 3ds: set CPU UID
> >
> > arch/arm/boards/freescale-mx25-3-stack/3stack.c | 2 ++
> > arch/arm/include/asm/armlinux.h | 4 ++++
> > arch/arm/lib/armlinux.c | 19 +++++++++++++++++++
> > arch/arm/mach-imx/imx25.c | 12 ++++++++++++
> > arch/arm/mach-imx/include/mach/generic.h | 1 +
> > arch/arm/mach-imx/include/mach/imx25-regs.h | 3 +++
> > 6 files changed, 41 insertions(+), 0 deletions(-)
--
~. .~ Tk Open Systems
=}------------------------------------------------ooO--U--Ooo------------{=
- baruch@tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -
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next prev parent reply other threads:[~2010-08-04 6:46 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-02 11:58 Baruch Siach
2010-08-02 11:58 ` [PATCH 1/3] arm: add support for the serial ATAG Baruch Siach
2010-08-02 12:13 ` Uwe Kleine-König
2010-08-02 11:58 ` [PATCH 2/3] imx25: add support for UID read from eFuse Baruch Siach
2010-08-02 11:58 ` [PATCH 3/3] mx25 3ds: set CPU UID Baruch Siach
2010-08-02 12:02 ` [PATCH 0/3] arm/imx: serial number / UID support Jean-Christophe PLAGNIOL-VILLARD
2010-08-04 6:46 ` Baruch Siach [this message]
2010-08-04 10:25 ` Jean-Christophe PLAGNIOL-VILLARD
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