From: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
To: Stefan Agner <stefan-XLVq0VzYD2Y@public.gmane.org>
Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
shawn.guo-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
kernel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org,
linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org,
u.kleine-koenig-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org,
jason-NLaQJdtUoK4Be96aLqz0jA@public.gmane.org,
olof-nZhT3qVonbNeoWH0uzbU5w@public.gmane.org,
daniel.lezcano-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org,
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pawel.moll-5wv7dgnIgG8@public.gmane.org,
robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org,
galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org
Subject: Re: [PATCH 11/12] ARM: dts: add support for Vybrid running on Cortex-M4
Date: Thu, 18 Dec 2014 23:44:22 +0100 [thread overview]
Message-ID: <2375016.nxLFC8UMcD@wuerfel> (raw)
In-Reply-To: <44e9d518da24fb0c910de464269b8551-XLVq0VzYD2Y@public.gmane.org>
On Thursday 18 December 2014 21:36:31 Stefan Agner wrote:
> On 2014-12-17 13:31, Arnd Bergmann wrote:
> > On Wednesday 17 December 2014 00:41:33 Stefan Agner wrote:
> >> On 2014-12-03 12:03, Arnd Bergmann wrote:
> >> > Starting with v3.19, you should be able to use the earlycon framework on
> >> > arm32, so it would be better to replace earlyprintk with earlycon here
> >> > and add a stdout-path property in chosen that points to the console
> >> > uart.
> >>
> >> I started to implement earlycon support, but something currently fails
> >> when earlycon tries to map the UART registers:
> >> [ 0.000000] earlycon_map: Couldn't map 0x40027000
> >>
> >> I traced the issue a bit further down and found that get_vm_area_caller
> >> returns NULL (in __arm_ioremap_pfn_caller). This happend on Linus master
> >> as of today (2dbfca5a181973558277b28b1f4c36362291f5e0). Do I miss
> >> something here?
> >
> > Hmm, I fear the arm32 FIX_EARLYCON_MEM support ended up not making it
> > into 3.19 after all.
>
> Is it because early_ioremap and fixmap still missing for arm32?
> According to Rob's patchset from spring fixmap is required, there is
> something in this tree:
> https://git.kernel.org/cgit/linux/kernel/git/robh/linux.git/log/?h=arm-fixmap
Right, that's the one, thanks for finding that again. There are five
patches on that branch. The first three got merged, and the one we
need is just the last one (ARM: fixmap early permanent mapping support),
but the implementation depends on the previous patch (arm: add
early_ioremap support).
I was hoping we'd see both of them in 3.19, but apparently Rob didn't
submit the latest version. If you don't mind, could you try forward-porting
them to the latest kernel and then submit them for inclusion? You could
also try adapting the last patch to work without the early_ioremap
support that we don't really need that urgently on arm32.
Arnd
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next prev parent reply other threads:[~2014-12-18 22:44 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-03 0:11 [PATCH 00/12] ARM: vf610m4: Add Vybrid Cortex-M4 support Stefan Agner
2014-12-03 0:12 ` [PATCH 01/12] ARM: dts: vf610: add routable-irqs property for gic node Stefan Agner
2014-12-03 0:12 ` [PATCH 03/12] irqchip: gic: define register_routable_domain_ops conditional Stefan Agner
[not found] ` <1417565531-4507-4-git-send-email-stefan-XLVq0VzYD2Y@public.gmane.org>
2014-12-03 10:46 ` Arnd Bergmann
2014-12-03 13:04 ` Thomas Gleixner
2014-12-03 17:28 ` Stefan Agner
[not found] ` <8eccedc781df2636a132dae449cbe774-XLVq0VzYD2Y@public.gmane.org>
2014-12-03 19:04 ` Marc Zyngier
[not found] ` <547F5EBD.6040705-5wv7dgnIgG8@public.gmane.org>
2014-12-04 0:03 ` Thomas Gleixner
2014-12-04 13:35 ` Stefan Agner
[not found] ` <a62b856866915f6939da79bdbcdabb39-XLVq0VzYD2Y@public.gmane.org>
2014-12-04 13:42 ` Marc Zyngier
[not found] ` <548064B9.4080300-5wv7dgnIgG8@public.gmane.org>
2014-12-04 13:50 ` Stefan Agner
2014-12-03 0:12 ` [PATCH 04/12] irqchip: nvic: support routable irq domain ops Stefan Agner
[not found] ` <1417565531-4507-5-git-send-email-stefan-XLVq0VzYD2Y@public.gmane.org>
2014-12-03 9:39 ` Uwe Kleine-König
2014-12-03 10:49 ` Arnd Bergmann
2014-12-03 17:32 ` Stefan Agner
2014-12-03 0:12 ` [PATCH 05/12] irqchip: nvic: increase number of external interrupts to 112 Stefan Agner
[not found] ` <1417565531-4507-6-git-send-email-stefan-XLVq0VzYD2Y@public.gmane.org>
2014-12-03 8:12 ` Uwe Kleine-König
[not found] ` <20141203081245.GH2129-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
2014-12-03 17:40 ` Stefan Agner
2014-12-03 0:12 ` [PATCH 07/12] Documentation: dt: imx: add MSCM documentation Stefan Agner
[not found] ` <1417565531-4507-8-git-send-email-stefan-XLVq0VzYD2Y@public.gmane.org>
2014-12-03 10:52 ` Arnd Bergmann
2014-12-03 17:49 ` Stefan Agner
2014-12-03 0:12 ` [PATCH 08/12] clocksource: add dependencies for Vybrid pit clocksource Stefan Agner
2014-12-03 0:12 ` [PATCH 09/12] ARM: unify MMU/!MMU addruart calls Stefan Agner
[not found] ` <1417565531-4507-10-git-send-email-stefan-XLVq0VzYD2Y@public.gmane.org>
2014-12-03 10:53 ` Arnd Bergmann
2014-12-03 0:12 ` [PATCH 10/12] ARM: vf610m4: add new machine and SoC for Vybrid on Cortex-M4 Stefan Agner
[not found] ` <1417565531-4507-11-git-send-email-stefan-XLVq0VzYD2Y@public.gmane.org>
2014-12-03 10:56 ` Arnd Bergmann
2014-12-03 18:00 ` Stefan Agner
2014-12-03 0:12 ` [PATCH 11/12] ARM: dts: add support for Vybrid running " Stefan Agner
2014-12-03 11:03 ` Arnd Bergmann
2014-12-16 22:19 ` Stefan Agner
2014-12-17 10:57 ` Arnd Bergmann
2014-12-16 23:41 ` Stefan Agner
2014-12-17 12:31 ` Arnd Bergmann
2014-12-18 20:36 ` Stefan Agner
[not found] ` <44e9d518da24fb0c910de464269b8551-XLVq0VzYD2Y@public.gmane.org>
2014-12-18 22:44 ` Arnd Bergmann [this message]
2014-12-20 18:49 ` Stefan Agner
[not found] ` <1417565531-4507-1-git-send-email-stefan-XLVq0VzYD2Y@public.gmane.org>
2014-12-03 0:12 ` [PATCH 02/12] ARM: dts: vf610: add Miscellaneous System Control Module (MSCM) Stefan Agner
2014-12-03 0:12 ` [PATCH 06/12] ARM: imx: add support for MSCM interrupt router Stefan Agner
2014-12-03 10:51 ` Arnd Bergmann
2014-12-03 0:12 ` [PATCH 12/12] ARM: vf610m4: add defconfig for Linux on Vybrids Cortex-M4 Stefan Agner
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