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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CBF9AC6FA83 for ; Fri, 2 Sep 2022 23:04:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230475AbiIBXED (ORCPT ); Fri, 2 Sep 2022 19:04:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44958 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229504AbiIBXED (ORCPT ); Fri, 2 Sep 2022 19:04:03 -0400 Received: from mail-lf1-x12e.google.com (mail-lf1-x12e.google.com [IPv6:2a00:1450:4864:20::12e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 12D60E8316; Fri, 2 Sep 2022 16:03:59 -0700 (PDT) Received: by mail-lf1-x12e.google.com with SMTP id bq23so5272168lfb.7; Fri, 02 Sep 2022 16:03:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date; bh=JwcThZfvgGkXvH/oN7CgEbjQX6xMEv9IlnB4AnwDp1w=; b=XEhCtacuL7sz7x1zd9T562MxiUsvaaPJftDtplKq/7UYHrsmUE1ydgFEdQ2h/ClfW6 6ccSu7C0ZTLcWvtQo/nBHx5c2YTxVdDWQOypehP/JKixamj5xUQl8ETbVLcSsg5Xa337 aiW/EN4V5J8MBXoMbBG/MJDdWDOJT3Q/wimWcbt0LbUHL8FE+ubtkGUNust0RCPVRVup ZQoCRu+A3EzS/CdQdgTCwt7pJcSYUTAzzISsQUKCmiyPuDtf2fbTR9asU3kolCxp7yMi lCx2ZnBC71Vlyj25Q1NzMdznlfj4dR4C14lsY1Qt0kH471GIzTbhUUEYXaTjjjNBgfmQ lfRg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date; bh=JwcThZfvgGkXvH/oN7CgEbjQX6xMEv9IlnB4AnwDp1w=; b=mtjzUjzUV+hZqCwx9n9v7hJtKs9NruSmezhg8fctErfS7wis6Vreg20VSI5xOheM1l 0iY3dAeo5irdGgDjreKg5bQy/LglCeEijK04tZeGfHFv+MceJqpLePYX1m6wVCIwNnJ7 Yrqq449lkRUCpu2xh95XSP0qx3Eyk4SYwcnZt6ZTVbzaA3bgyXGeRoVe0Wzw1eNZXzLE IXuMh8QWEv28QMZ6nKit2Z/lzVUlJLYKsT42pet9lQlfr4cChQvlLGphcp5e5pLNwE8V FTbHCL/FIEEjZvZVq425vQKMR5P9i/TYDh/Ava5RHTG1Xr/vUbA1cewQCVwz6uChNCb3 r4dw== X-Gm-Message-State: ACgBeo1fI5Os7BNyZbLJlWEzNeT6dVHT+lWja0Lem7LeGkdCm//9CL1N qj3AxJV91nZo1JYl8EzUHiY= X-Google-Smtp-Source: AA6agR7Z2FehWmCHWUOj9dB/4A7HYfLxZaSgOsEhd90WFW8vXX1ICBOJkci0w7dn5wDyrL+c7mqpkA== X-Received: by 2002:a05:6512:32a9:b0:494:a994:6fac with SMTP id q9-20020a05651232a900b00494a9946facmr1444344lfe.5.1662159837478; Fri, 02 Sep 2022 16:03:57 -0700 (PDT) Received: from mobilestation ([83.220.236.124]) by smtp.gmail.com with ESMTPSA id q22-20020a056512211600b004947303691dsm384418lfr.95.2022.09.02.16.03.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 02 Sep 2022 16:03:56 -0700 (PDT) Date: Sat, 3 Sep 2022 02:03:53 +0300 From: Serge Semin To: Sudip Mukherjee Cc: Serge Semin , Mark Brown , Rob Herring , Krzysztof Kozlowski , Greentime Hu , Jude Onyenegecha , William Salmon , Adnan Chowdhury , Ben Dooks , linux-spi@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Jeegar Lakhani Subject: Re: [PATCH 00/11] Add support for enhanced SPI for Designware SPI controllers Message-ID: <20220902230353.mscyeklhamzpg5s7@mobilestation> References: <20220802175755.6530-1-sudip.mukherjee@sifive.com> <20220826180327.yazfoydjiyygd7qf@mobilestation> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On Tue, Aug 30, 2022 at 09:48:35AM +0100, Sudip Mukherjee wrote: > On Fri, Aug 26, 2022 at 7:03 PM Serge Semin wrote: > > > > Hello Sudip > > > > On Tue, Aug 02, 2022 at 06:57:44PM +0100, Sudip Mukherjee wrote: > > > Some Synopsys SSI controllers support enhanced SPI which includes > > > Dual mode, Quad mode and Octal mode. DWC_ssi includes clock stretching > > > feature in enhanced SPI modes which can be used to prevent FIFO underflow > > > and overflow conditions while transmitting or receiving the data respectively. > > > This is only tested on controller version 1.03a. > > > > > > > > > I've deliberately collected all the generic comments here so you'd be > > aware of the required changes in total, because I very much doubt all > > of them could be fixed at once via a single patchset iteration. But as > > soon as all of them are fixed we'll get a very nice and neat solution > > for the eSPI feature. > > > > Thanks a lot for the summary here Sergey. I am sure I will have a few > questions for you after I start with the changes. Ok. Don't hesitate to ask. -Sergey > > -- > Regards > Sudip