From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7FD35C388F2 for ; Fri, 6 Nov 2020 04:43:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 228E720704 for ; Fri, 6 Nov 2020 04:43:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726116AbgKFEns (ORCPT ); Thu, 5 Nov 2020 23:43:48 -0500 Received: from mga11.intel.com ([192.55.52.93]:15177 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725828AbgKFEnr (ORCPT ); Thu, 5 Nov 2020 23:43:47 -0500 IronPort-SDR: 4ebYAZVL9d3eS0KmvT7tZixbW13Gvq0oM2TrvMvKOjFC6S6F68r5dvoxe59+EvhzsSAChqUHQD ipYbCeQbGJSg== X-IronPort-AV: E=McAfee;i="6000,8403,9796"; a="165991804" X-IronPort-AV: E=Sophos;i="5.77,455,1596524400"; d="scan'208";a="165991804" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Nov 2020 20:43:47 -0800 IronPort-SDR: A8wwO5mdzozqG58eqr5nBl8RN78TcBBXoF5GwHVYMhWRx3h2D9KWerFQACbRWZ+sl90QXoP1IG VgL0tGRQ2SCQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,455,1596524400"; d="scan'208";a="364057875" Received: from linux.intel.com ([10.54.29.200]) by FMSMGA003.fm.intel.com with ESMTP; 05 Nov 2020 20:43:46 -0800 Received: from [10.215.162.127] (vramuthx-MOBL1.gar.corp.intel.com [10.215.162.127]) by linux.intel.com (Postfix) with ESMTP id 270AC580841; Thu, 5 Nov 2020 20:43:42 -0800 (PST) Reply-To: vadivel.muruganx.ramuthevar@linux.intel.com Subject: Re: [PATCH v5 5/6] dt-bindings: spi: Convert cadence-quadspi.txt to cadence-quadspi.yaml To: Linus Walleij Cc: Mark Brown , Vignesh R , Tudor Ambarus , "linux-kernel@vger.kernel.org" , linux-spi , Rob Herring , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , =?UTF-8?Q?Miqu=c3=a8l_Raynal?= , Simon Goldschmidt , Dinh Nguyen , Richard Weinberger , cheol.yong.kim@intel.com, qi-ming.wu@intel.com References: <20201029062014.27620-1-vadivel.muruganx.ramuthevar@linux.intel.com> <20201029062014.27620-6-vadivel.muruganx.ramuthevar@linux.intel.com> From: "Ramuthevar, Vadivel MuruganX" Message-ID: <280623e3-d182-60f3-5588-96d00e573694@linux.intel.com> Date: Fri, 6 Nov 2020 12:43:41 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On 5/11/2020 3:14 pm, Linus Walleij wrote: > On Thu, Oct 29, 2020 at 8:39 AM Ramuthevar,Vadivel MuruganX > wrote: > >> From: Ramuthevar Vadivel Murugan >> >> Convert the cadence-quadspi.txt documentation to cadence-quadspi.yaml >> remove the cadence-quadspi.txt from Documentation/devicetree/bindings/spi/ >> >> Signed-off-by: Ramuthevar Vadivel Murugan > >> + cdns,is-decoded-cs: >> + type: boolean >> + description: >> + Flag to indicate whether decoder is used or not. > > Please elaborate a bit on what kind of decoder this is. > I am curious! :) Sure, I will elaborate more about decoder for chip select. QSPI controller has in-built chip select decoder instead of external decder circuit, it supports multiple chip selection by 2-to-4 decoder, the below combinations CS0 - 1110 CS1 - 1101 CS2 - 1011 CS3 - 0111 when in direct access mode, each chip selection has it's own specified memory region as well. Regards Vadivel > > Yours, > Linus Walleij >