linux-kernel - Re: [PATCH v5 00/10] sunxi: Support IRQ wakeup from deep sleep

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Date:   Thu, 21 Jan 2021 19:33:54 -0600
From:   Samuel Holland <samuel@...lland.org>
To:     Marc Zyngier <maz@...nel.org>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Maxime Ripard <mripard@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, Chen-Yu Tsai <wens@...e.org>
Cc:     Ondrej Jirman <megous@...ous.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v5 00/10] sunxi: Support IRQ wakeup from deep sleep

On 1/21/21 2:35 PM, Marc Zyngier wrote:
> On Sun, 17 Jan 2021 23:50:30 -0600, Samuel Holland wrote:
>> Allwinner sun6i/sun8i/sun50i SoCs (A31 and newer) have two interrupt
>> controllers: GIC and R_INTC. GIC does not support wakeup. R_INTC handles
>> the external NMI pin, and provides 32+ IRQs to the ARISC. The first 16
>> of these correspond 1:1 to a block of GIC IRQs starting with the NMI.
>> The last 13-16 multiplex the first (up to) 128 GIC SPIs.
>>
>> This series replaces the existing chained irqchip driver that could only
>> control the NMI, with a stacked irqchip driver that also provides wakeup
>> capability for those multiplexed SPI IRQs. The idea is to preconfigure
>> the ARISC's IRQ controller, and then the ARISC firmware knows to wake up
>> as soon as it receives an IRQ. It can also decide how deep it can
>> suspend based on the enabled wakeup IRQs.
>>
>> [...]
> 
> Applied to irq/irqchip-5.12, thanks!
> 
> [01/10] dt-bindings: irq: sun6i-r: Split the binding from sun7i-nmi
>         commit: ad6b47cdef760410311f41876b21eb0c6fda4717
> [02/10] dt-bindings: irq: sun6i-r: Add a compatible for the H3
>         commit: 6436eb4417094ea3308b33d8392fc02a1068dc78
> [03/10] irqchip/sun6i-r: Use a stacked irqchip driver
>         commit: 4e34614636b31747b190488240a95647c227021f
> [04/10] irqchip/sun6i-r: Add wakeup support
>         commit: 7ab365f6cd6de1e2b0cb1e1e3873dbf68e6f1003
> 
> Please route the dts patches via the soc tree. Also, I had to
> manually fix the first patch as it wouldn't apply on top of
> 5.11-rc4 (which tree has it been diffed against?). Please
> check that the resolution is correct.

This series was based on sunxi/for-next, which contains commit
752b0aac99c7 ("dt-bindings: irq: sun7i-nmi: Add binding documentation
for the V3s NMI")[1].

[1]:
https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux.git/commit/?h=sunxi/for-next&id=752b0aac99c7e0b179875cdfa102d378ccb794a2

> Cheers,
> 
> 	M.
>