From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dmitry Torokhov <dmitry.torokhov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Re: [PATCH resend v2] input: Add new sun4i-lradc-keys driver
Date: Wed, 17 Dec 2014 09:32:11 -0800
Message-ID: <1918972.jFlKNuYrbH@dtor-glaptop>
References: <1418827411-13265-1-git-send-email-hdegoede@redhat.com> <1418827411-13265-2-git-send-email-hdegoede@redhat.com>
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To: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>, linux-input-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree <devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
List-Id: devicetree@vger.kernel.org

On Wednesday, December 17, 2014 03:43:31 PM Hans de Goede wrote:
> +       /*
> +        * lradc supports only one keypress at a time, release does not give
> +        * any info as to which key was released, so we cache the keycode.
> +        */
> +       if ((ints & CHAN0_KEYDOWN_IRQ) && lradc->chan0_keycode == 0) {
> +               val = readl(lradc->base + LRADC_DATA0) & 0x3f;
> +               voltage = val * lradc->vref / 63;
> +
> +               for (i = 0; i < lradc->chan0_map_count; i++) {
> +                       diff = abs(lradc->chan0_map[i].voltage - voltage);
> +                       if (diff < closest) {
> +                               closest = diff;
> +                               keycode = lradc->chan0_map[i].keycode;
> +                       }
> +               }
> +
> +               lradc->chan0_keycode = keycode;
> +               input_report_key(lradc->input, lradc->chan0_keycode, 1);
> +       }
> +
> +       if (ints & CHAN0_KEYUP_IRQ) {
> +               input_report_key(lradc->input, lradc->chan0_keycode, 0);
> +               lradc->chan0_keycode = 0;
> +       }

Can release and press be reported simultaneously? Should we process release 
first?

Thanks.

-- 
Dmitry