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 6664DC00140 for ; Mon, 8 Aug 2022 16:09:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243570AbiHHQJW (ORCPT ); Mon, 8 Aug 2022 12:09:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41326 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243316AbiHHQJW (ORCPT ); Mon, 8 Aug 2022 12:09:22 -0400 Received: from mx07-00178001.pphosted.com (mx07-00178001.pphosted.com [185.132.182.106]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EC2D615A2B; Mon, 8 Aug 2022 09:09:20 -0700 (PDT) Received: from pps.filterd (m0241204.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 278BeAh0022290; Mon, 8 Aug 2022 18:09:01 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h=message-id : date : mime-version : subject : to : cc : references : from : in-reply-to : content-type : content-transfer-encoding; s=selector1; bh=rf79dk1iiMXWP3qcuM7pMgLmAweJ/wxrLQJ66XbRxFc=; b=S2UxETO7/2Zq2pKp71n5vrL2HZpPfqQtHZk65AhuEGIwmyT7zOZDvtmnYmuRniEw3U3M FhTZBIZIPBSGifuI8x7CAB30JJO7mqVd71fRol9RINJMxO4jyAbKuX+quXmakdX1Tt1D xT4Qm5T9Bk+tbHzZj+duojwrPeRvOBWSyipcuaQdhiHnV9pDQ0CrldPt0K+S707iDioq kofTBdJ1PJsLr4a1nuoiUiRT+RWbiI1xInSs1IehGeyRCsBnvsO+FD30cx1rRFWT0nqA lPOsnEvldrlkdjZdgAtpMp9hTdhYQAY7J9dc9vJiQTDd2jWLNks56bGKnQOBjpGX19yG rg== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 3hsfn0ames-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 08 Aug 2022 18:09:01 +0200 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id C6A5E10002A; Mon, 8 Aug 2022 18:09:00 +0200 (CEST) Received: from Webmail-eu.st.com (shfdag1node1.st.com [10.75.129.69]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id B18B3257AB8; Mon, 8 Aug 2022 18:09:00 +0200 (CEST) Received: from [10.201.21.72] (10.75.127.46) by SHFDAG1NODE1.st.com (10.75.129.69) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2308.20; Mon, 8 Aug 2022 18:09:00 +0200 Message-ID: <79fd7e19-ceef-14fb-5a83-603740735f8f@foss.st.com> Date: Mon, 8 Aug 2022 18:08:59 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: Re: [PATCH 1/3] dt-bindings: spi: stm32: Add st,dual-flash property in st,stm32-qspi.yaml Content-Language: en-US To: Krzysztof Kozlowski , Mark Brown , Alexandre Torgue , , CC: , , , , , References: <20220808074051.44736-1-patrice.chotard@foss.st.com> <20220808074051.44736-2-patrice.chotard@foss.st.com> <9ad4b4a8-988e-f185-f80c-6f15f341ce8c@linaro.org> From: Patrice CHOTARD In-Reply-To: <9ad4b4a8-988e-f185-f80c-6f15f341ce8c@linaro.org> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.75.127.46] X-ClientProxiedBy: SFHDAG2NODE3.st.com (10.75.127.6) To SHFDAG1NODE1.st.com (10.75.129.69) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.883,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-08-08_10,2022-08-08_01,2022-06-22_01 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Hi Krzystof On 8/8/22 11:01, Krzysztof Kozlowski wrote: > On 08/08/2022 10:40, patrice.chotard@foss.st.com wrote: >> From: Patrice Chotard >> >> Add new property st,dual-flash which allows to use the QSPI interface as a >> communication channel using up to 8 qspi line. >> This mode can only be used if cs-gpios property is defined. >> >> Signed-off-by: Patrice Chotard >> --- >> Documentation/devicetree/bindings/spi/st,stm32-qspi.yaml | 8 ++++++++ >> 1 file changed, 8 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/spi/st,stm32-qspi.yaml b/Documentation/devicetree/bindings/spi/st,stm32-qspi.yaml >> index 6ec6f556182f..5e4f9109799e 100644 >> --- a/Documentation/devicetree/bindings/spi/st,stm32-qspi.yaml >> +++ b/Documentation/devicetree/bindings/spi/st,stm32-qspi.yaml >> @@ -46,6 +46,14 @@ properties: >> - const: tx >> - const: rx >> >> + st,dual-flash: >> + type: boolean >> + description: >> + Allows to use 8 data lines in case cs-gpios property is defined. > > It's named dual-flash, but what if you want to use QSPI to connect for > example to FPGA? > > Also how is this related to parallel-memories property? I called it "dual-flash" simply because it enable the dual flash feature of the QSPI block (bit CR_DFM : Dual Flash Mode) which allows to use the 8 lines simultaneously of our dual QSPI block. Best regards Patrice > > Best regards, > Krzysztof