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From: Gerd Hoffmann <kraxel@redhat.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: linux-arm-kernel@lists.infradead.org,
	Mark Rutland <mark.rutland@arm.com>,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
	<devicetree@vger.kernel.org>, Pawel Moll <pawel.moll@arm.com>,
	Ian Campbell <ijc+devicetree@hellion.org.uk>,
	Russell King <linux@armlinux.org.uk>,
	open list <linux-kernel@vger.kernel.org>,
	Eric Anholt <eric@anholt.net>, Rob Herring <robh+dt@kernel.org>,
	linux-rpi-kernel@lists.infradead.org,
	Kumar Gala <galak@codeaurora.org>
Subject: Re: [PATCH 09/32] bcm2837-rpi-3-b.dts for 32bit arm
Date: Thu, 02 Jun 2016 17:11:31 +0200	[thread overview]
Message-ID: <1464880291.24775.111.camel@redhat.com> (raw)
In-Reply-To: <4795604.XAe8xnhung@wuerfel>

  Hi,

> > > > Reference to ../../../arm64/boot/dts/broadcom/bcm2837-rpi-3-b.dts
> > > > directly in the Makefile?

Actually tried that, and to my surprise this worked fine for both "make
dtbs" and "make dtbs_install".

So we should just do that I guess ...

> > Yes, in theory.  No, in practice.  As far I know the rpi3 is the only
> > 64bit soc where a almost identical 32bit version exists, so running
> > 32bit kernels on a 64bit processor actually happens in practice and I
> > expect this to continue.  If you want create sdcard images which run on
> > any rpi variant this is pretty much the only reasonable way to do it.
> 
> I think the Allwinner A64 and the Samsung s5p6818 are other examples
> for this, where the initial run of boards all run 32-bit kernels
> for much of the same reasons. If users want to run a 32-bit distro
> on rpi-3 and on e.g. orange-pi, I don't see why they wouldn't also run
> the same binary on A64.

... and others can join the party on a case-by-case basis.

I still expect for the majority of arm64 boards it is not very useful,
so I don't think we should build all of them unconditionally.

cheers,
  Gerd

  reply	other threads:[~2016-06-02 15:15 UTC|newest]

Thread overview: 70+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <1464817421-8519-1-git-send-email-kraxel@redhat.com>
2016-06-01 21:43 ` [PATCH 01/32] arm64: Add platform selection for BCM2835 Gerd Hoffmann
2016-06-01 21:49   ` Florian Fainelli
2016-06-02  6:45     ` Gerd Hoffmann
2016-06-02 16:25       ` Ray Jui
2016-06-02 16:48         ` Scott Branden
2016-06-02 17:12           ` Gerd Hoffmann
2016-06-02 17:21             ` Scott Branden
2016-06-02 17:36               ` Florian Fainelli
2016-06-02 17:30       ` Catalin Marinas
2016-06-01 21:43 ` [PATCH 02/32] arm64: Add BCM2835 support to the defconfig Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 03/32] irqchip: bcm2835: Avoid arch/arm-specific handle_IRQ Gerd Hoffmann
2016-06-02  0:50   ` Jason Cooper
2016-06-02 18:06     ` Eric Anholt
2016-06-01 21:43 ` [PATCH 04/32] dt-bindings: Add root properties for Raspberry Pi 3 Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 05/32] ARM: bcm2835: Add devicetree for the " Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 06/32] arm64: Fix physical to DMA mappings Gerd Hoffmann
2016-06-02 17:20   ` Catalin Marinas
2016-06-01 21:43 ` [PATCH 07/32] ARM: bcm2835: dt: Add the ethernet to the device trees Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 08/32] ARM: bcm2837: " Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 09/32] bcm2837-rpi-3-b.dts for 32bit arm Gerd Hoffmann
2016-06-01 22:00   ` Arnd Bergmann
2016-06-01 22:30     ` Eric Anholt
2016-06-01 22:39       ` Arnd Bergmann
2016-06-02  6:56         ` Gerd Hoffmann
2016-06-02  7:24           ` Arnd Bergmann
2016-06-02  9:14             ` Gerd Hoffmann
2016-06-02  9:53               ` Arnd Bergmann
2016-06-02 15:11                 ` Gerd Hoffmann [this message]
2016-06-02 15:23                   ` Arnd Bergmann
2016-06-01 21:43 ` [PATCH 10/32] don't force serial pins to uart0 Gerd Hoffmann
2016-06-01 22:19   ` Arnd Bergmann
2016-06-02 18:19     ` Eric Anholt
2016-06-01 21:43 ` [PATCH 11/32] ARM: bcm2835: Define standard pinctrl groups in the gpio node Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 12/32] ARM: bcm2835: Replace alt0/i2s_alt[02] with standard groups Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 13/32] bcm2837-rpi-3-b.dts: add gpio Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 14/32] bcm2837-rpi-3-b.dts: vc4 hdmi fixup Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 15/32] ARM: bcm2835: Move the emmc pin group to bcm283x.dtsi Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 16/32] bcm2837-rpi-3-b.dts: move the emmc pin group Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 17/32] ARM: bcm2835: Add a group for mapping pins 48-53 to sdhost Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 18/32] ARM: bcm2835: Move most RPi default pin groups to their devices Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 19/32] bcm2837-rpi-3-b.dts: move " Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 20/32] dt-bindings: Add binding for brcm,bcm2835-sdhost Gerd Hoffmann
2016-06-06 13:12   ` Rob Herring
2016-06-01 21:43 ` [PATCH 21/32] mmc: bcm2835-sdhost: Add new driver for the internal SD controller Gerd Hoffmann
2016-06-01 22:18   ` Arnd Bergmann
2016-06-02 18:12     ` Eric Anholt
2016-06-03  8:42       ` Arnd Bergmann
2016-06-21 12:33     ` Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 22/32] ARM: bcm2835: Include SDHOST in the device tree Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 23/32] ARM: bcm2835: Enable SDHOST by default Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 24/32] i2c: bcm2835: Don't complain on -EPROBE_DEFER from getting our clock Gerd Hoffmann
2016-07-22  7:26   ` Wolfram Sang
2016-06-01 21:43 ` [PATCH 25/32] dt-gpio-fix Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 26/32] enable uart1 on the BT pins Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 27/32] gpio: Add support for the FXL6408 GPIO expander Gerd Hoffmann
2016-06-06 23:50   ` Eric Anholt
2016-06-07  0:02   ` Florian Fainelli
2016-06-08  9:10   ` Linus Walleij
2016-06-09 17:22     ` Eric Anholt
2016-06-01 21:43 ` [PATCH 28/32] i2c: bcm2835: Set up the rising/falling edge delays Gerd Hoffmann
2016-07-22  7:26   ` Wolfram Sang
2016-06-01 21:43 ` [PATCH 29/32] ARM: bcm2835: Use i2c-gpio for the expander, instead Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 30/32] ARM: bcm2835: Add a new EMMC pin group from the downstream tree Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 31/32] enable wireless Gerd Hoffmann
2016-06-01 21:43 ` [PATCH 32/32] mmc: bcm2835: Import bcm2835-mmc and switch to it Gerd Hoffmann
2016-06-02 16:52   ` Stefan Wahren
2016-06-02 18:18     ` Eric Anholt
2016-06-02 19:09       ` Stefan Wahren
2016-06-02 20:03         ` Gerd Hoffmann
2016-06-02 21:40         ` Eric Anholt

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