linux-kernel - Re: [PATCH 02/17] irqchip: Add PLX Technology RPS IRQ Controller

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Date:	Thu, 3 Mar 2016 17:17:39 +0000
From:	Marc Zyngier <marc.zyngier@....com>
To:	Neil Armstrong <narmstrong@...libre.com>,
	Ma Haijun <mahaijuns@...il.com>, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, tglx@...utronix.de,
	jason@...edaemon.net
Subject: Re: [PATCH 02/17] irqchip: Add PLX Technology RPS IRQ Controller

On 03/03/16 16:56, Neil Armstrong wrote:
> On 03/03/2016 04:32 PM, Ma Haijun wrote:
>> Hi Neil,
>>
>> Glad to see the mainline efforts of this SoC family.
>>
>> Previously, I did not really understand what this "RPS" stood for.
>> After some digging(1)., now I believe it means ARM's Reference Peripheral
>> Specification
>> though the spec itself seems not publicly available, the peripheral specs
>> are accessible.
>> The interrupt controller is an AMBA Interrupt Controller(2) and the timers
>> are
>> AMBA Timer(3). Besides, ARM Dual-Timer Module (SP804)(4) looks like an
>> extended version
>> of the AMBA timer
>>
>> 1)
>> http://infocenter.arm.com/help/topic/com.arm.doc.dai0030a/DAI0030A_sw_int_ap
>> psnote.pdf
>> 2) http://infocenter.arm.com/help/topic/com.arm.doc.ddi0047d/DDI0047.pdf
>> 3) http://infocenter.arm.com/help/topic/com.arm.doc.ddi0049c/AMBA_Timer.pdf
>> 4) http://infocenter.arm.com/help/topic/com.arm.doc.ddi0271d/DDI0271.pdf
>>
>> Regards,
>> Haijun
> 
> Hi Haijun,
> 
> Thanks for the tips !
> 
> Indeed the timer looks like the timer-sp804 actually upstream, I'll try this driver before posting a v2.
> 
> Concerning the IRQ controller, I did not find any similar drivers.
> 
> Marc, Arnd, should I create a specific "arm RPS irq controller" instead ?

Why not - I wonder which HW this controller got slapped on... It doesn't
even have a cryptic name! ;-)

Thanks,

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