linux-kernel - Re: [PATCH] Input: gpio_keys: Add level trigger support for GPIO keys

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Message-ID: <CAMz4kuKb8g5dAu5WQ847CODtVgJQBa_svbeQGGDsYpCjipBp_g@mail.gmail.com>
Date:   Fri, 9 Feb 2018 17:23:15 +0800
From:   Baolin Wang <baolin.wang@...aro.org>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stephen lu <lumotuwe@...il.com>,
        Arvind Yadav <arvind.yadav.cs@...il.com>,
        Joseph Lo <josephl@...dia.com>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
        DTML <devicetree@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Mark Brown <broonie@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH] Input: gpio_keys: Add level trigger support for GPIO keys

On 9 February 2018 at 14:39, Dmitry Torokhov <dmitry.torokhov@...il.com> wrote:
> On Thu, Feb 8, 2018 at 10:08 PM, Baolin Wang <baolin.wang@...aro.org> wrote:
>> On some platforms (such as Spreadtrum platform), the GPIO keys can only
>> be triggered by level type.
>
> How do you stop the interrupt from re-triggering as long as the key
> stays pressed?

We will set the level type irq handler as handle_level_irq(), in this
function, it will mask and ack the irq firstly.

-- 
Baolin.wang
Best Regards