From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755556Ab2IQRDZ (ORCPT ); Mon, 17 Sep 2012 13:03:25 -0400 Received: from antcom.de ([188.40.178.216]:55676 "EHLO chuck.antcom.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755266Ab2IQRDX (ORCPT ); Mon, 17 Sep 2012 13:03:23 -0400 Message-ID: <505757D8.8090405@antcom.de> Date: Mon, 17 Sep 2012 19:03:20 +0200 From: Roland Stigge Organization: ANTCOM IT Research & Development User-Agent: Mozilla/5.0 (X11; Linux i686; rv:10.0.5) Gecko/20120624 Icedove/10.0.5 MIME-Version: 1.0 To: Linus Walleij CC: Lee Jones , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, STEricsson_nomadik_linux@list.st.com, linus.walleij@stericsson.com, arnd@arndb.de, devicetree-discuss@lists.ozlabs.org Subject: Re: [PATCH 09/19] ARM: ux500: Enable SSP (SPI) for HREF when booting Device Tree References: <1347016499-29354-1-git-send-email-lee.jones@linaro.org> <1347016499-29354-10-git-send-email-lee.jones@linaro.org> In-Reply-To: X-Enigmail-Version: 1.4 OpenPGP: url=subkeys.pgp.net Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi! On 09/10/2012 01:11 PM, Linus Walleij wrote: > +SPI slave nodes must be children of the SPI master node and can > +contain the following properties. > + > +- pl022,interface : interface type: > + 0: SPI > + 1: Texas Instruments Synchronous Serial Frame Format > + 2: Microwire (Half Duplex) > +- pl022,com-mode : polling, interrupt or dma > +- pl022,rx-level-trig : Rx FIFO watermark level > +- pl022,tx-level-trig : Tx FIFO watermark level > +- pl022,ctrl-len : Microwire interface: Control length > +- pl022,wait-state : Microwire interface: Wait state > +- pl022,duplex : Microwire interface: Full/Half duplex > > Currently this is defined as auxdata in board-mop500.c > but notanly cs-gpios (num chipselects) should come from > device tree instead. > > It appears Roland has written his bindings such that DT > data augments platform data (yes, I am also getting crazy > about this prioritization, mea culpa for ACKing this without > proper discussion) so it appears that you could actually > use AUXDATA and some stuff in the DT at the same > time. Sorry for the incompleteness of the devicetree conversion. I'm sending a patch (separately) that makes it possible to specify everything via devicetree, so you can choose between dt and platform data. Except in case of callback specification (dma_filter()), you need to provide platform data. Interestingly, when I removed the actual platform data from the board file, I noticed that I still needed to specify a device name (like dev:ssp0) to make it work. But this seems to be expected according to the documentation of OF_DEV_AUXDATA(). Are there any plans or ideas how to fix this? When we have sorted out this driver change (please check the new pl022 specific dt property names!), I will provide patches for arm-soc to actually use this new interface via dts files. Thanks in advance, Roland