From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261437AbVEaUe1 (ORCPT ); Tue, 31 May 2005 16:34:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261447AbVEaUe1 (ORCPT ); Tue, 31 May 2005 16:34:27 -0400 Received: from kiln.isn.net ([198.167.161.1]:60859 "EHLO kiln.isn.net") by vger.kernel.org with ESMTP id S261437AbVEaUbS (ORCPT ); Tue, 31 May 2005 16:31:18 -0400 Message-ID: <429CC990.1050005@isn.net> Date: Tue, 31 May 2005 15:31:12 -0500 From: "Garst R. Reese" User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.6) Gecko/20050319 X-Accept-Language: en-us, en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: SPI Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Attn: Randy Dunlap, It means Serial Peripheral Interface. Among other things it is one of the modes of talking to MMC & SD cards, some LCD's, D/As etc. There may be code in the SD09 SD055 drivers. It is a 3 or 4 wire interface -- clk, in, out, and optional extra thing that I don't recall. I think it runs up to about 25Mbits/s. (not subscribed) Garst