linux-kernel - Re: [PATCH v3 0/3] input: pwm-beeper: add feature to set volume level

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Message-ID: <20170119213700.GC13542@dtor-ws>
Date:   Thu, 19 Jan 2017 13:37:00 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Frieder Schrempf <frieder.schrempf@...eet.de>
Cc:     robh@...nel.org, pawel.moll@....com, ijc+devicetree@...lion.org.uk,
        galak@...eaurora.org, luis@...ethencourt.com,
        linux-input@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, David Lechner <david@...hnology.com>
Subject: Re: [PATCH v3 0/3] input: pwm-beeper: add feature to set volume level

On Thu, Jan 19, 2017 at 04:24:07PM +0100, Frieder Schrempf wrote:
> Make the driver accept switching volume levels via sysfs.
> This can be helpful if the beep/bell sound intensity needs
> to be adapted to the environment of the device.
> 
> The number of volume levels available and their values can
> be specified via device tree (similar to pwm-backlight).
> 
> The volume adjustment is done by changing the duty cycle of
> the pwm signal.

I wonder how this all will mesh up with beepers that have dedicated
amplifiers (support is being added by David Lechner).

Thanks.

-- 
Dmitry