Re: [PATCH 3/6] Add chip driver for WM9712 touchscreen

[Andrew Morton <akpm@linux-foundation.org>]

On Tue, 26 Feb 2008 13:40:15 +0000 Mark Brown <broonie@opensource.wolfsonmicro.com> wrote:

> +/*
> + * Set adc sample delay.
> + *
> + * For accurate touchpanel measurements, some settling time may be
> + * required between the switch matrix applying a voltage across the
> + * touchpanel plate and the ADC sampling the signal.
> + *
> + * This delay can be set by setting delay = n, where n is the array
> + * position of the delay in the array delay_table below.
> + * Long delays > 1ms are supported for completeness, but are not
> + * recommended.
> + */
> +static int delay = 3;
> +module_param(delay, int, 0);
> +MODULE_PARM_DESC(delay, "Set adc sample delay.");

I assume we don't support more than one attached device per host?

If so, is that a problem?  One could envisage an application with lots
of screens attached to one Linux box.