From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751392Ab2LTPa5 (ORCPT ); Thu, 20 Dec 2012 10:30:57 -0500 Received: from mail-we0-f174.google.com ([74.125.82.174]:57024 "EHLO mail-we0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750949Ab2LTPau (ORCPT ); Thu, 20 Dec 2012 10:30:50 -0500 From: Federico Vaga To: Grant Likely Cc: spi-devel-general@lists.sourceforge.net, linux-kernel@vger.kernel.org Subject: Re: [PATCH RFC] spidev.c: add sysfs attributes for SPI configuration Date: Thu, 20 Dec 2012 16:30:36 +0100 Message-ID: <1440955.3UsNh3CGzX@number-5> User-Agent: KMail/4.9.4 (Linux/3.6.10-2.fc17.x86_64; KDE/4.9.4; x86_64; ; ) In-Reply-To: <20121219150925.8262E3E0AD7@localhost> References: <1353777608-24934-1-git-send-email-federico.vaga@gmail.com> <20121219150925.8262E3E0AD7@localhost> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wednesday 19 December 2012 15:09:25 Grant Likely wrote: > Not a good idea. sysfs is not a good place for operational > interfaces. Please use the spi character devices for direct > manipulation of the SPI configuration. Hello, Can you explain why it is not a good idea? I do not understand; what is the advantage of ioctl through char device? Or what it the issue with sysfs? Thank you very much -- Federico Vaga