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From: Ulf Hansson <ulf.hansson@linaro.org>
Date: Tue, 12 Dec 2017 15:20:56 +0100
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Subject: Re: [PATCH v2 2/3] PM / core: Add IN_BAND_WAKEUP driver flag
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
        Linux PM list <linux-pm@vger.kernel.org>,
        Kevin Hilman <khilman@kernel.org>,
        Viresh Kumar <viresh.kumar@linaro.org>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Simon Horman <horms@verge.net.au>,
        Niklas Soderlund <niklas.soderlund+renesas@ragnatech.se>,
        Linux-Renesas <linux-renesas-soc@vger.kernel.org>
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On 12 December 2017 at 09:16, Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> Hi Ulf,
>
> On Mon, Dec 11, 2017 at 9:59 PM, Ulf Hansson <ulf.hansson@linaro.org> wrote:
>> That together with an option of allowing "consumed resource-devices"
>> (irqchip) to be included in the wakeup path. I am thinking, perhaps
>> another driver PM flag (DPM_FLAG_WAKEUP_PATH), that the PM core looks
>> at and sets ->power.wakeup_path flag for the device and its parents.
>
> This is complicated by the fact that currently the device and irq
> subsystems don't really share data. E.g. {en,dis}able_irq_wake() and
> irq_set_irq_wake() don't take a device parameter, only an interrupt number,
> and conversion from interrupt numbers to devices is non-trivial.
> That's why I handled it in the irqchip drivers in the series referenced
> below.

Yes, that seems like a good way forward for now.

We can always look into how to extend the irq subsystem to deal with
this internally, but I rather leave that to be done as a separate
task.

[...]

Kind regards
Uffe