linux-kernel - Re: Arndale Timer Interrupt Question

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Date:	Thu, 23 Jan 2014 11:40:23 +0530
From:	Mj Embd <mj.embd@...il.com>
To:	Tomasz Figa <t.figa@...sung.com>
Cc:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	linaro-kernel <linaro-kernel@...ts.linaro.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-samsung-soc@...r.kernel.org
Subject: Re: Arndale Timer Interrupt Question

On 1/10/14, Tomasz Figa <t.figa@...sung.com> wrote:
> Hi,
>
> On 09.01.2014 13:52, Bartlomiej Zolnierkiewicz wrote:
>>
>> added linux-samsung-soc to cc:,
>> it is a better suited list for this question
>>
>> On Thursday, January 09, 2014 10:30:56 AM Mj Embd wrote:
>>> I am a bit confused on the interrupt number for CNTVIRQ..CNTHPIRQ. Can
>>> you please help here.
>>>
>>> As per the exynos5 public manual
>>> What is the difference between  CPU_nCNTHPIRQ[0] and CNTHPIRQ.
>
> I'm not sure if this is really what I think it is, but looking at the
> manual, CPU_nCNTHPIRQ[0] and [1] SPI ports and CNTHPIRQ PPI port seem to
> be the same signals, with the difference that the first two are shared
> interrupts connected through the combiner, while the last one is a
> per-processor interrupt, directly connected to GIC PPI port, allowing
> each CPU to get its own CNTHPIRQ signal ([0] for CPU 0 and [1] for CPU 1).

So while registering the IRQ which one has to be used Core0:26/33 Core1:26/54 ?

> Best regards,
> Tomasz
>
>>>
>>> While the later has an interrupt ID 26, the former is part of a group
>>> with combined interrupt id as 33 for core 0 and 54 for core 1.
>>>
>>> For a timer interrupt which goes to PL2, which id should be used 26 or
>>> 33 for core 0 ?
>>>
>>> Please clear this confusion.
>>>
>>> Many Thanks
>>
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>


-- 
-mj
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