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From: marc.zyngier@arm.com (Marc Zyngier)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 2/2] arm64: dts: Fix broken architected timer interrupt trigger
Date: Mon, 22 Aug 2016 11:26:33 +0100	[thread overview]
Message-ID: <57BAD359.30707@arm.com> (raw)
In-Reply-To: <1470045256-9032-3-git-send-email-marc.zyngier@arm.com>

Arnd, Olof,

On 01/08/16 10:54, Marc Zyngier wrote:
> The ARM architected timer specification mandates that the interrupt
> associated with each timer is level triggered (which corresponds to
> the "counter >= comparator" condition).
> 
> A number of DTs are being remarkably creative, declaring the interrupt
> to be edge triggered. A quick look at the TRM for the corresponding ARM
> CPUs clearly shows that this is wrong, and I've corrected those.
> For non-ARM designs (and in the absence of a publicly available TRM),
> I've made them active low as well, which can't be completely wrong
> as the GIC cannot disinguish between level low and level high.
> 
> The respective maintainers are of course welcome to prove me wrong.
> 
> While I was at it, I took the liberty to fix a couple of related issue,
> such as some spurious affinity bits on ThunderX, and their complete
> absence on ls1043a (both of which seem to be related to copy-pasting
> from other DTs).
> 
> Acked-by: Duc Dang <dhdang@apm.com>
> Acked-by: Carlo Caione <carlo@endlessm.com>
> Acked-by: Michal Simek <michal.simek@xilinx.com>
> Acked-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> Acked-by: Dinh Nguyen <dinguyen@opensource.altera.com>
> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

Any update on this patch? We have a workaround merged already, but it'd
be good to have the DTS fixed as well.

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...

      parent reply	other threads:[~2016-08-22 10:26 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-08-01  9:54 [PATCH v2 0/2] Fix arch timer trigger Marc Zyngier
2016-08-01  9:54 ` [PATCH v2 1/2] clocksource/arm_arch_timer: Force per-CPU interrupt to be level-triggered Marc Zyngier
2016-08-01  9:54 ` [PATCH v2 2/2] arm64: dts: Fix broken architected timer interrupt trigger Marc Zyngier
2016-08-01 10:00   ` Masahiro Yamada
2016-09-02 16:20     ` Arnd Bergmann
2016-08-22 10:26   ` Marc Zyngier [this message]

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