From patchwork Wed Aug 10 09:32:13 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Patrice CHOTARD X-Patchwork-Id: 12940386 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 26EDDC25B08 for ; Wed, 10 Aug 2022 09:34:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=QebNBgYE0RVCAyUWz05QG8J6Anupf5WxLZasTBrfeeQ=; b=ZW5nmBLG7ZTpbA sfJ02P3IGt87ZSDzzkpbyDmQksDqxTHPuycBbO6hY9FRmT0DCyzJ1iiUA2dsaWJP8bpHpamauWSZD 90oTiFHB4EkZJilJCTxFSbqrV7Rl/KGIlabTK81WWVKBtrQQF35nSURU/90gomB+qX6B7I1lUokra 6/ei50o1ZNFu18Ugl3yU+Su3QZCDHMhxl+JfPTzOCdsEvTZEIeWour1sbSLmMscEongppm5I2vhbR vN9PZ/Fu2/fUdytP3R5kOMnLk5yh05saFrHvRML//vmL0wp+9SqQnxPROF9A78Q8lF1g9s1Z4OF82 VKfvZfKqpIA5Rw+EM5mg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oLi4z-00B4Go-TZ; Wed, 10 Aug 2022 09:32:46 +0000 Received: from mx07-00178001.pphosted.com ([185.132.182.106]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oLi4s-00B4DG-5m for linux-arm-kernel@lists.infradead.org; Wed, 10 Aug 2022 09:32:42 +0000 Received: from pps.filterd (m0288072.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 27A68jdC004798; Wed, 10 Aug 2022 11:32:21 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding : content-type; s=selector1; bh=JGY5zWrfCCK8U/3zgAroqF0FgJuxZGbZAnLQqoBRrso=; b=0j8S3SNqXOkek34mkUPW7uFbheMJ/q/UayZS01EQTvKX2ZCKctNple+tOvUt6NQ3XLgy iflhYECKtF1WaeZkpZa7A2PzvLnKvBSfKcYcnyoPUHeMxaIH0o2ttriPdHBOZojroaeW +R930MK1dlNNsgsbpbrJDhrc1c9ERT7wW1bTVTYSFBvAErdiYoWKTFnv13DItzFUo7ht VOczuZv9+G37EtoMeFnkwukUOC1VQnpWfnrjx2iCkeFgDx/9gbflsMtE/l0ko4Q/eTN2 Uids09E37dl1rnUjsntBDXd0iw5cv5S/k0aSaZ9l+vVfDaUgshaxn/rocxeYTc9OPDud AQ== 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 3huwpmbmm8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 10 Aug 2022 11:32:21 +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 E49A110002A; Wed, 10 Aug 2022 11:32:20 +0200 (CEST) Received: from Webmail-eu.st.com (shfdag1node1.st.com [10.75.129.69]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id CF39421B52F; Wed, 10 Aug 2022 11:32:20 +0200 (CEST) Received: from localhost (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; Wed, 10 Aug 2022 11:32:20 +0200 From: To: Mark Brown , Alexandre Torgue , , CC: , , , , , , Subject: [PATCH v2 0/2] spi: stm32_qspi: use QSPI bus as 8 lines communication channel Date: Wed, 10 Aug 2022 11:32:13 +0200 Message-ID: <20220810093215.794977-1-patrice.chotard@foss.st.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 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=2022-08-10_03,2022-08-09_02,2022-06-22_01 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220810_023238_779398_0731F248 X-CRM114-Status: GOOD ( 12.78 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Patrice Chotard The goal of this series is to allow to use QSPI bus as a 8 lines communication channel for specific purpose. The QSPI block offers the possibility to communicate with 2 flashes in parrallel using the dual flash mode, 8 data lines are then used. Usage of DT parallel-memories property is needed to enable dual flash mode. The addition of the legacy transfer_one_message() spi callback is also needed as currently the stm32-qspi driver only supports spi_controller_mem_ops API. arch/arm/boot/dts/stm32mp15-pinctrl.dtsi | 50 +++++++---- arch/arm/boot/dts/stm32mp157c-ev1.dts | 12 ++- drivers/spi/spi-stm32-qspi.c | 103 +++++++++++++++++++++-- 3 files changed, 139 insertions(+), 26 deletions(-)