From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/8] ARM: support for Moschip MCS814x SoCs
Date: Tue, 17 Jul 2012 13:45:56 +0000 [thread overview]
Message-ID: <201207171345.56988.arnd@arndb.de> (raw)
In-Reply-To: <2808767.4NLQARgpQ0@flexo>
On Tuesday 17 July 2012, Florian Fainelli wrote:
> On Tuesday 17 July 2012 13:07:23 Arnd Bergmann wrote:
> > But is there much difference between the two? How much code would
> > actually get built for one chip but not the other? If all the
> > differences can be run-time detected from the device tree, I
> > think it's better to not have different compile-time options at
> > all.
>
> The big difference between the two is actually the CPU core, for MCS8140 they
> used a genuine ARM926EJS and for MCS8142 they actually use a FA526 core.
Ok, I see. That probably is enough difference to justify separate Kconfig
statements, especially since building a combined ARMv4/v5 kernel has some
overhead compared to supporting just one of the two.
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
To: Florian Fainelli <florian-p3rKhJxN3npAfugRpC6u6w@public.gmane.org>
Cc: Mike Turquette
<mturquette-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: Re: [PATCH 1/8] ARM: support for Moschip MCS814x SoCs
Date: Tue, 17 Jul 2012 13:45:56 +0000 [thread overview]
Message-ID: <201207171345.56988.arnd@arndb.de> (raw)
In-Reply-To: <2808767.4NLQARgpQ0@flexo>
On Tuesday 17 July 2012, Florian Fainelli wrote:
> On Tuesday 17 July 2012 13:07:23 Arnd Bergmann wrote:
> > But is there much difference between the two? How much code would
> > actually get built for one chip but not the other? If all the
> > differences can be run-time detected from the device tree, I
> > think it's better to not have different compile-time options at
> > all.
>
> The big difference between the two is actually the CPU core, for MCS8140 they
> used a genuine ARM926EJS and for MCS8142 they actually use a FA526 core.
Ok, I see. That probably is enough difference to justify separate Kconfig
statements, especially since building a combined ARMv4/v5 kernel has some
overhead compared to supporting just one of the two.
Arnd
next prev parent reply other threads:[~2012-07-17 13:45 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-15 14:49 [PATCH 0/8] ARM: support for Moschip MCS814x SoCs Florian Fainelli
2012-07-15 14:49 ` Florian Fainelli
2012-07-15 14:49 ` [PATCH 1/8] " Florian Fainelli
2012-07-15 14:49 ` Florian Fainelli
2012-07-16 12:29 ` Thomas Petazzoni
2012-07-16 12:29 ` Thomas Petazzoni
2012-07-16 12:43 ` Florian Fainelli
2012-07-16 12:43 ` Florian Fainelli
2012-07-16 15:55 ` Arnd Bergmann
2012-07-16 15:55 ` Arnd Bergmann
2012-07-16 17:57 ` Nicolas Pitre
2012-07-16 17:57 ` Nicolas Pitre
2012-07-23 19:11 ` Florian Fainelli
2012-07-23 19:11 ` Florian Fainelli
2012-07-27 22:42 ` Linus Walleij
2012-07-27 22:42 ` Linus Walleij
2012-07-16 15:54 ` Arnd Bergmann
2012-07-16 15:54 ` Arnd Bergmann
2012-07-16 20:47 ` Turquette, Mike
2012-07-16 20:47 ` Turquette, Mike
2012-07-17 9:41 ` Florian Fainelli
2012-07-17 9:41 ` Florian Fainelli
2012-07-17 10:47 ` Florian Fainelli
2012-07-17 10:47 ` Florian Fainelli
2012-07-16 22:12 ` Linus Walleij
2012-07-16 22:12 ` Linus Walleij
2012-07-17 9:35 ` Florian Fainelli
2012-07-17 9:35 ` Florian Fainelli
2012-07-17 9:34 ` Florian Fainelli
2012-07-17 9:34 ` Florian Fainelli
2012-07-17 13:07 ` Arnd Bergmann
2012-07-17 13:07 ` Arnd Bergmann
2012-07-17 13:32 ` Florian Fainelli
2012-07-17 13:32 ` Florian Fainelli
2012-07-17 13:45 ` Arnd Bergmann [this message]
2012-07-17 13:45 ` Arnd Bergmann
2012-07-17 10:16 ` Thomas Petazzoni
2012-07-17 10:16 ` Thomas Petazzoni
2012-07-17 13:12 ` Arnd Bergmann
2012-07-17 13:12 ` Arnd Bergmann
2012-07-17 13:28 ` Thomas Petazzoni
2012-07-17 13:28 ` Thomas Petazzoni
2012-07-17 13:51 ` Arnd Bergmann
2012-07-17 13:51 ` Arnd Bergmann
2012-07-16 22:06 ` Linus Walleij
2012-07-16 22:06 ` Linus Walleij
2012-07-15 14:49 ` [PATCH 2/8] ARM: MCS814x: add Device Tree based MCS8140 board support Florian Fainelli
2012-07-15 14:49 ` Florian Fainelli
2012-07-17 13:19 ` Arnd Bergmann
2012-07-17 13:19 ` Arnd Bergmann
2012-07-17 13:34 ` Florian Fainelli
2012-07-17 13:34 ` Florian Fainelli
2012-07-17 13:53 ` Arnd Bergmann
2012-07-17 13:53 ` Arnd Bergmann
2012-07-17 13:57 ` Florian Fainelli
2012-07-17 13:57 ` Florian Fainelli
2012-07-15 14:49 ` [PATCH 3/8] ARM: MCS814x: add Device Tree bindings documentation Florian Fainelli
2012-07-15 14:49 ` Florian Fainelli
2012-07-17 13:24 ` Arnd Bergmann
2012-07-17 13:24 ` Arnd Bergmann
2012-07-17 13:35 ` Florian Fainelli
2012-07-17 13:35 ` Florian Fainelli
2012-07-15 14:49 ` [PATCH 4/8] ARM: MCS814X: add DTS file for Tigal/Robotech RBT-832 Florian Fainelli
2012-07-15 14:49 ` Florian Fainelli
2012-07-17 13:27 ` Arnd Bergmann
2012-07-17 13:27 ` Arnd Bergmann
2012-07-15 14:49 ` [PATCH 5/8] ARM: MCS814x: add DTS file for Devolo dLAN USB Extender Florian Fainelli
2012-07-15 14:49 ` Florian Fainelli
2012-07-15 14:49 ` [PATCH 6/8] ARM: MCS814x: provide a sample defconfig file Florian Fainelli
2012-07-15 14:49 ` Florian Fainelli
2012-07-15 14:49 ` [PATCH 7/8] ARM: MSC814X: add Kconfig and Makefile to arch/arm Florian Fainelli
2012-07-15 14:49 ` Florian Fainelli
2012-07-15 14:49 ` [PATCH 8/8] ARM: MSC814x: add MAINTAINERS entry Florian Fainelli
2012-07-15 14:49 ` Florian Fainelli
2012-07-15 19:59 ` [PATCH 0/8] ARM: support for Moschip MCS814x SoCs Arnd Bergmann
2012-07-15 19:59 ` Arnd Bergmann
2012-07-16 8:16 ` Florian Fainelli
2012-07-16 8:16 ` Florian Fainelli
2012-07-16 18:09 ` Nicolas Pitre
2012-07-16 18:09 ` Nicolas Pitre
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