From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mailout08.t-online.de (mailout08.t-online.de [194.25.134.20]) by ozlabs.org (Postfix) with ESMTP id F3292B7CE6 for ; Tue, 26 Jan 2010 06:22:57 +1100 (EST) From: Torsten Fleischer Subject: spi_mpc8xxx: Setting cs_change at the last transfer of a message Date: Mon, 25 Jan 2010 17:21:41 +0100 MIME-Version: 1.0 To: spi-devel-general@lists.sourceforge.net Content-Type: Text/Plain; charset="us-ascii" Message-Id: <201001251721.41544.to-fleischer@t-online.de> Cc: linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , As stated in spi.h (at struct spi_transfer) the driver can keep the chip select of the last device active if cs_change is set at the last transfer of a message. The spi_mpc8xxx driver always deactivates the chip select after completing the message regardless of cs_change is set or not. I'd like to patch this. But before doing that I'd like to learn if there are any known use cases where the above described behavior of the driver is needed. Thanks Torsten