From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760819Ab0J0JUk (ORCPT ); Wed, 27 Oct 2010 05:20:40 -0400 Received: from earthlight.etchedpixels.co.uk ([81.2.110.250]:59019 "EHLO www.etchedpixels.co.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1760726Ab0J0JUi (ORCPT ); Wed, 27 Oct 2010 05:20:38 -0400 Date: Wed, 27 Oct 2010 10:19:35 +0100 From: Alan Cox To: Cc: , , , , Subject: Re: [PATCH] input: spi: Driver for SPI data stream driven vibrator Message-ID: <20101027101935.1b50b9dd@lxorguk.ukuu.org.uk> In-Reply-To: References: <1288013463-21722-1-git-send-email-ilkka.koskinen@nokia.com> <20101026111344.GB24714@angua.secretlab.ca> X-Mailer: Claws Mail 3.7.6 (GTK+ 2.18.9; x86_64-redhat-linux-gnu) Face: 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 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > 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..)