linux-kernel - Re: [PATCH] input: spi: Driver for SPI data stream driven vibrator

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Message-ID: <20101027101935.1b50b9dd@lxorguk.ukuu.org.uk>
Date:	Wed, 27 Oct 2010 10:19:35 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	<ilkka.koskinen@...ia.com>
Cc:	<grant.likely@...retlab.ca>, <linux-input@...r.kernel.org>,
	<dmitry.torokhov@...il.com>,
	<spi-devel-general@...ts.sourceforge.net>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] input: spi: Driver for SPI data stream driven vibrator

> The driver could, of course, calculate the bit streams with help of
> board specific functions. It was just thought that tuning vibration
> device would be a lot easier, if we could just modify the bit streams
> provided by user space application. In fact, the bit stream basically
> consists of series of PWM pulses that are fed to the vibra.
> 
> Perhaps, calculating the waveforms in the driver at probe time would
> be the most natural choice :\

Or assuming its a trivial conversion accepting them in a standard format
and doing a quick pass across them ?

(and failing that adding and documenting the format..)
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