From: marc.zyngier@arm•com (Marc Zyngier)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 00/16] irqchip: gic: killing gic_arch_extn, slowly
Date: Wed, 03 Dec 2014 14:59:00 +0000 [thread overview]
Message-ID: <547F2534.6040104@arm.com> (raw)
In-Reply-To: <2236572.MdjJGoEARl@wuerfel>
Hi Arnd,
On 03/12/14 14:30, Arnd Bergmann wrote:
> On Tuesday 02 December 2014 16:58:01 Marc Zyngier wrote:
>>
>> - This actively *breaks* existing setups. Once you boot a new kernel
>> with an old DT, suspend/resume *will* be broken. Old kernels on a
>> new DT won't even boot! You've been warned. This really outline the
>> necessity of actually describing the HW in device trees...
>
> I wonder if we should take this as the trigger to come up with a
> better way of handling incompatible binding changes. The machine_desc
> has a .dt_fixup callback that we could use to modify the DT passed
> from a boot loader and warn about it, but no platform does this
> at the moment.
>
> From what I can tell, the required change to get an old dtb working
> with a new kernel is to add a particular node and flip a few
> interrupt-parent properties, which seems doable as a quirk if
> people agree that it's a good idea.
That's probably the only way to avoid the breakage introduced by this
kind of changes. A few questions though:
- Where do we stop? Eventually, don't we end-up with a full DT in there?
- When do we retire such fixup? Or do we keep them forever?
Thanks,
M.
--
Jazz is not dead. It just smells funny...
next prev parent reply other threads:[~2014-12-03 14:59 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-02 16:58 [PATCH 00/16] irqchip: gic: killing gic_arch_extn, slowly Marc Zyngier
2014-12-02 16:58 ` [PATCH 01/16] ARM: tegra: irq: nuke leftovers from non-DT support Marc Zyngier
2014-12-02 16:58 ` [PATCH 02/16] irqchip: tegra: add DT-based support for legacy interrupt controller Marc Zyngier
2014-12-02 16:58 ` [PATCH 03/16] ARM: tegra: skip gic_arch_extn setup if DT has a LIC node Marc Zyngier
2014-12-02 16:58 ` [PATCH 04/16] ARM: tegra: update DTs to expose legacy interrupt controller Marc Zyngier
2014-12-02 16:58 ` [PATCH 05/16] DT: tegra: add binding for the " Marc Zyngier
2014-12-02 16:58 ` [PATCH 06/16] ARM: tegra: remove old LIC support Marc Zyngier
2014-12-02 16:58 ` [PATCH 07/16] ARM: omap: convert wakeupgen to stacked domains Marc Zyngier
2014-12-02 16:58 ` [PATCH 08/16] DT: omap4/5: add binding for the wake-up generator Marc Zyngier
2014-12-02 16:58 ` [PATCH 09/16] ARM: imx6: convert wakeupgen to stacked domains Marc Zyngier
2014-12-06 16:08 ` Stefan Agner
2014-12-08 11:18 ` Marc Zyngier
2014-12-02 16:58 ` [PATCH 10/16] ARM: exynos4/5: convert pmu wakeup " Marc Zyngier
2014-12-02 16:58 ` [PATCH 11/16] DT: exynos: update PMU binding Marc Zyngier
2014-12-02 16:58 ` [PATCH 12/16] irqchip: gic: add an entry point to set up irqchip flags Marc Zyngier
2014-12-02 16:58 ` [PATCH 13/16] ARM: shmobile: remove use of gic_arch_extn.irq_set_wake Marc Zyngier
2014-12-04 6:39 ` Simon Horman
2014-12-04 8:57 ` Marc Zyngier
2014-12-04 11:46 ` Simon Horman
2014-12-02 16:58 ` [PATCH 14/16] ARM: ux500: switch from gic_arch_extn to gic_set_irqchip_flags Marc Zyngier
2014-12-03 13:52 ` Linus Walleij
2014-12-02 16:58 ` [PATCH 15/16] ARM: zynq: " Marc Zyngier
2014-12-02 16:58 ` [PATCH 16/16] irqchip: gic: Drop support for gic_arch_extn Marc Zyngier
2014-12-03 14:30 ` [PATCH 00/16] irqchip: gic: killing gic_arch_extn, slowly Arnd Bergmann
2014-12-03 14:59 ` Marc Zyngier [this message]
2014-12-03 20:32 ` Arnd Bergmann
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