linux-kernel - Re: [PATCH v4 0/3] Add Mediatek CIRQ interrupt controller

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Date:   Wed, 10 May 2017 11:42:19 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Youlin Pei <youlin.pei@...iatek.com>,
        Marc Zyngier <marc.zyngier@....com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, srv_heupstream@...iatek.com,
        hongkun.cao@...iatek.com, yong.wu@...iatek.com,
        erin.lo@...iatek.com
Subject: Re: [PATCH v4 0/3] Add Mediatek CIRQ interrupt controller



On 07/04/17 11:54, Youlin Pei wrote:
> On Fri, 2017-04-07 at 09:52 +0100, Marc Zyngier wrote:
>> On 07/04/17 09:06, Youlin Pei wrote:
>>> In Mediatek SOCs, the CIRQ is a low power interrupt controller designed to
>>> works outside MCUSYS which comprises with Cortex-Ax cores,CCI and GIC.
>>>
>>> The CIRQ controller is integrated in between MCUSYS and interrupt sources
>>> as the second level interrupt controller. The external interrupts which
>>> outside MCUSYS will feed through CIRQ then bypass to GIC.
>>>
>>> In normal mode(where MCUSYS is active), CIRQ is disabled and interrupts
>>> will directly issue to MCUSYS. When MCUSYS enters sleep mode, where GIC
>>> is power downed. CIRQ will be enabled and monitor all edge trigger
>>> interrupts(only edge trigger interrupts will be lost in this scenario).
>>> When an edge interrupt is triggered, CIRQ will record the status and
>>> generated a pulse signal to GIC when flush command is executed.
>>>
>>> With CIRQ, MCUSYS can be completely turned off to improve the system
>>> power consumption without losing interrupts.
>>>
>>> change in v4:
>>> 1. add some comment to explain CIRQ suspend callback.
>>> 2. rebase on 4.11
>>
>> Hi Youlin,
>>
>> I'm happy to take the first two patches through the irq tree. How do we
>> deal with the third one? It seems to me that it'd be better routed via
>> armsoc.
>>
>> Let me know what you and Matthias want to do.
> 
> Hi Marc,
> 
> Thanks for your review. I think that driver and dtsi can merged
> separately.
> 
> Hi Matthias,
> Could you help to review the dtsi patch?

queued now for v4.12-next/dts32
sorry for the late answer.

Matthias

> Thanks a lot!
> 
>>
>> Thanks,
>>
>> 	M.
> 
>