linux-kernel - Re: [PATCH 1/2] ASoC: rt5677: allow multiple interrupt sources

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Date:   Wed, 3 Apr 2019 15:32:04 -0600
From:   Fletcher Woodruff <fletcherw@...omium.org>
To:     Mark Brown <broonie@...nel.org>
Cc:     linux-kernel@...r.kernel.org, Ben Zhang <benzh@...omium.org>,
        Bard Liao <bardliao@...ltek.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Liam Girdwood <lgirdwood@...il.com>,
        Oder Chiou <oder_chiou@...ltek.com>,
        Takashi Iwai <tiwai@...e.com>,
        Curtis Malainey <cujomalainey@...omium.org>,
        alsa-devel@...a-project.org, Ross Zwisler <zwisler@...gle.com>
Subject: Re: [PATCH 1/2] ASoC: rt5677: allow multiple interrupt sources

On Mon, Apr 1, 2019 at 11:02 PM Mark Brown <broonie@...nel.org> wrote:
> regmap-irq should support active high/low, and if it doesn't it can't be
> a unique thing that only this device wants to implement so the common
> code should be improved.

The rt5677 driver needs its own irq regardless for hotword detection.
If we implemented this in regmap-irq, we wouldn't be able to use it.

> This looks unrelated to the polarity of the interupt?

Yes this is separate. If a plug/unplug happens after regmap_read and
before regmap_write, it will not be registered, so we loop to make
sure that it's caught in a later iteration. I can clarify this in the
patch notes.