linux-kernel - Re: [RFC PATCH] arm: imx: Workaround i.MX6 PMU interrupts muxed to one SPI

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Date:	Thu, 20 Nov 2014 12:48 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Daniel Thompson <daniel.thompson@...aro.org>,
	Shawn Guo <shawn.guo@...aro.org>,
	Sascha Hauer <kernel@...gutronix.de>,
	linaro-kernel@...ts.linaro.org,
	Russell King <linux@....linux.org.uk>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>, patches@...aro.org,
	Will Deacon <will.deacon@....com>,
	linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ingo Molnar <mingo@...hat.com>,
	Paul Mackerras <paulus@...ba.org>,
	John Stultz <john.stultz@...aro.org>,
	Sumit Semwal <sumit.semwal@...aro.org>
Subject: Re: [RFC PATCH] arm: imx: Workaround i.MX6 PMU interrupts muxed to one SPI

On Thursday 20 November 2014 11:42:37 Daniel Thompson wrote:
> Notes:
>     This patch adopts the approach used on the u8500 (db8500_pmu_handler)
>     but the logic has been generalized for any number of CPUs, mostly
>     because the i.MX6 has a both dual and quad core variants.
>     
>     However it might be better to include the generalized logic in the main
>     armpmu code. I think the logic could be deployed automatically on SMP
>     systems with only a single not-percpu IRQ, replacing the
>     plat->handle_irq dance we currently do to hook up this code.
>     
>     Thoughts? (or is there already shared logic to do this that I
>     overlooked)
> 

I would definitely prefer to have this handled in the armpmu implementation,
given that there are at least two platforms that need the exact same
hack.

	Arnd
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