linux-kernel - Re: [PATCH 1/7] gpio: Add support for hierarchical IRQ domains

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Message-ID: <CAD=FV=Xfasgsh0C7h+pZPAh2RxaJDibaAf4WGRTipYUjnZw8vg@mail.gmail.com>
Date:   Fri, 18 Jan 2019 10:12:05 -0800
From:   Doug Anderson <dianders@...omium.org>
To:     Lina Iyer <ilina@...eaurora.org>
Cc:     Stephen Boyd <sboyd@...nel.org>, Evan Green <evgreen@...omium.org>,
        Marc Zyngier <marc.zyngier@....com>,
        LKML <linux-kernel@...r.kernel.org>,
        Raju P L S S S N <rplsssn@...eaurora.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Thierry Reding <treding@...dia.com>
Subject: Re: [PATCH 1/7] gpio: Add support for hierarchical IRQ domains

Hi,

On Wed, Dec 19, 2018 at 2:12 PM Lina Iyer <ilina@...eaurora.org> wrote:
>
> From: Thierry Reding <treding@...dia.com>
>
> Hierarchical IRQ domains can be used to stack different IRQ controllers
> on top of each other. One specific use-case where this can be useful is
> if a power management controller has top-level controls for wakeup
> interrupts. In such cases, the power management controller can be a
> parent to other interrupt controllers and program additional registers
> when an IRQ has its wake capability enabled or disabled.
>
> Signed-off-by: Thierry Reding <treding@...dia.com>
> ---

Drive-by-nit: If you are re-posting someone else's patch you need to
add your Signed-off-by.

-Doug