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=-7.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 3005CC4727C for ; Tue, 29 Sep 2020 16:59:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C5416208B8 for ; Tue, 29 Sep 2020 16:58:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601398739; bh=UKf9jlFXgNAv8fxB8ejbjpnnPRj3E+EHdo9PMOIIGI8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=txQ7sUcT1z0VTox7v8QpK5AMSdM/dzjHPYyebds8wTig5EAKg2kw768s9Av+Rbt8J itS1XIpC8WL7COCUGYUZX12b8jJvl6zqKLYuIIEX6mZy4XVQKUe9pkosD70EK6LU/R kTZZ1sHx1ZeYCoFfxYRbtPcvBPxYx1Tj8I1DDeSo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728728AbgI2Q67 (ORCPT ); Tue, 29 Sep 2020 12:58:59 -0400 Received: from mail-oo1-f66.google.com ([209.85.161.66]:35548 "EHLO mail-oo1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728385AbgI2Q67 (ORCPT ); Tue, 29 Sep 2020 12:58:59 -0400 Received: by mail-oo1-f66.google.com with SMTP id k13so1452588oor.2; Tue, 29 Sep 2020 09:58:58 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=qL1+dUVZc7/FRZNXOFrFvDJ142erdjwjd9zJZIOHq50=; b=kVMspgCJdV6RJBQBFVLKSqwnDd4ow6UmUS88IQSmj/T6JEm535U0ufv7U8De03EBQk zBeevLojvW//waNuIG/0wYfHtWKJK0DTjdQ0H+WevT7vrWAyXYispXNciyDzhacbNoXP DjtW3qb9a6tHKOJdbJZWfILprZZ2LPPeKM8mHKsxS2n+qyKPS3t0U+vsDd/PgItJ76Pm KSDVbH+zarkHD0IlYTRWFVdw+y5NwMSfhK8OyETrQxQtSSq52CcBIYEJqS/o27y4USAV /dDCLOeNTOLnAAjMcrp5b4ilkIehKTI1AJitJMjRUtHIokO3Alsk2tBIUo1NMytqXFXW Spwg== X-Gm-Message-State: AOAM531t/y5fXBFcYyiFDua+PAc8SpxGrWkc5X9jzJZO1YGKAWKySnQu aZlI3bN7tXHbecrEAvFgBg== X-Google-Smtp-Source: ABdhPJz+hm6g2H8hVGsLti0LBkjY2MyJFyjhR0LdDpUD3Zw8SCc4VQurzB6MLyErzsdi2oDudi+X4A== X-Received: by 2002:a4a:d80a:: with SMTP id f10mr5379686oov.76.1601398738179; Tue, 29 Sep 2020 09:58:58 -0700 (PDT) Received: from xps15 (24-155-109-49.dyn.grandenetworks.net. [24.155.109.49]) by smtp.gmail.com with ESMTPSA id j16sm1118642ota.1.2020.09.29.09.58.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Sep 2020 09:58:57 -0700 (PDT) Received: (nullmailer pid 772313 invoked by uid 1000); Tue, 29 Sep 2020 16:58:56 -0000 Date: Tue, 29 Sep 2020 11:58:56 -0500 From: Rob Herring To: Serge Semin Cc: Lars Povlsen , Alexey Malahov , "wuxu . wu" , Rob Herring , Andy Shevchenko , Serge Semin , devicetree@vger.kernel.org, Ramil Zaripov , linux-spi@vger.kernel.org, Feng Tang , Pavel Parkhomenko , Mark Brown , linux-kernel@vger.kernel.org, Andy Shevchenko Subject: Re: [PATCH 29/30] dt-bindings: spi: dw: Add Baikal-T1 SPI Controllers Message-ID: <20200929165856.GA772254@bogus> References: <20200920112914.26501-1-Sergey.Semin@baikalelectronics.ru> <20200920112914.26501-30-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200920112914.26501-30-Sergey.Semin@baikalelectronics.ru> Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org On Sun, 20 Sep 2020 14:29:13 +0300, Serge Semin wrote: > These controllers are based on the DW APB SSI IP-core and embedded into > the SoC, so two of them are equipped with IRQ, DMA, 64 words FIFOs and 4 > native CS, while another one as being utilized by the Baikal-T1 System > Boot Controller has got a very limited resources: no IRQ, no DMA, only a > single native chip-select and just 8 bytes Tx/Rx FIFOs available. That's > why we have to mark the IRQ to be optional for the later interface. > > The SPI controller embedded into the Baikal-T1 System Boot Controller can > be also used to directly access an external SPI flash by means of a > dedicated FSM. The corresponding MMIO region availability is switchable by > the embedded multiplexor, which phandle can be specified in the dts node. > > * We added a new example to test out the non-standard Baikal-T1 System > Boot SPI Controller DT binding. > > Co-developed-by: Ramil Zaripov > Signed-off-by: Ramil Zaripov > Signed-off-by: Serge Semin > --- > .../bindings/spi/snps,dw-apb-ssi.yaml | 33 +++++++++++++++++-- > 1 file changed, 31 insertions(+), 2 deletions(-) > Reviewed-by: Rob Herring