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=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 68E07C4361B for ; Mon, 7 Dec 2020 14:02:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 385A8235DD for ; Mon, 7 Dec 2020 14:02:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726821AbgLGOCX (ORCPT ); Mon, 7 Dec 2020 09:02:23 -0500 Received: from esa4.microchip.iphmx.com ([68.232.154.123]:64961 "EHLO esa4.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725960AbgLGOCX (ORCPT ); Mon, 7 Dec 2020 09:02:23 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1607349743; x=1638885743; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=EZu7eRgTCyJ0MdARgyamRkTg/cOik+X698PnPvls7qg=; b=kOBcuT79cXR4dy9jkN6wx/TFP2s2G0pb8gRMWL6g42+rI+Ih3LS+AvOh 5yNpgIo6nIDHUsYeQfZMFSSS1aCxdtqDaXO6zyhGg01QJnS1he/GNU184 D/0g1Ej/JXtLDkDjrZnI0486Zs3QQwj81ufA6EgJ/hNGPzF/njAkHodG9 dmBuOMnoVrKpfA02cEb+xqcxjtOL9WX2ZxEF2I4esu2jfAkdOCeHTPP6P HHdH6g+tANfEGfXbAAXt5tnMyvZsfE6P6IyY2koq0Xu/BRiTXiIMj7L/s vOONIJlKTGgS5HvO9PXA2ynTn5zfPsMGQdEc2MWQzRT7NR6RWDxs0cZ2I g==; IronPort-SDR: zqbibeXiu4l+V1rijRuK1HqjUf38CHsMWsZW9xBt8VoPp5RjDUjAgZdQcrJZGvpULurKaBtSoR rxZ4eRIk4DJH806JFPdPTeBO32W477ncSLh/qy4x2ZgtwIgrq+A7edcdv2eJLhT32+RqtGGSA/ eMaoqguswWzrgBvBMZqUmbyQquRWtBBJ35+SlbUximFmoT8CCh7G0qAcaV4euQ4txQRjxX++1H LNYtZdjUf9paymw+GZCWQ/bOZVSmjfX5cNsixdH2Ep8ADJOlaRKF1x2naTwbUOXegHTC6J4nvG 9Vw= X-IronPort-AV: E=Sophos;i="5.78,399,1599548400"; d="scan'208";a="96128975" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa4.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 07 Dec 2020 07:00:45 -0700 Received: from chn-vm-ex03.mchp-main.com (10.10.85.151) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Mon, 7 Dec 2020 07:00:45 -0700 Received: from atudor-ThinkPad-T470p.amer.actel.com (10.10.115.15) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Mon, 7 Dec 2020 07:00:42 -0700 From: Tudor Ambarus To: , CC: , , , , , , "Tudor Ambarus" Subject: [PATCH 3/4] spi: atmel-quadspi: Write QSPI_IAR only when needed Date: Mon, 7 Dec 2020 15:59:58 +0200 Message-ID: <20201207135959.154124-4-tudor.ambarus@microchip.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201207135959.154124-1-tudor.ambarus@microchip.com> References: <20201207135959.154124-1-tudor.ambarus@microchip.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The address must be written in QSPI_IAR only when we have a instruction frame with address but no data. Signed-off-by: Tudor Ambarus --- drivers/spi/atmel-quadspi.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/spi/atmel-quadspi.c b/drivers/spi/atmel-quadspi.c index 30533ab82c7b..5fd0dc70bd74 100644 --- a/drivers/spi/atmel-quadspi.c +++ b/drivers/spi/atmel-quadspi.c @@ -385,9 +385,11 @@ static int atmel_qspi_set_cfg(struct atmel_qspi *aq, /* Clear pending interrupts */ (void)atmel_qspi_read(aq, QSPI_SR); - if (aq->caps->has_ricr) { - /* Set QSPI Instruction Frame registers */ + /* Set QSPI Instruction Frame registers. */ + if (op->addr.nbytes && !op->data.nbytes) atmel_qspi_write(iar, aq, QSPI_IAR); + + if (aq->caps->has_ricr) { if (op->data.dir == SPI_MEM_DATA_IN) atmel_qspi_write(icr, aq, QSPI_RICR); else @@ -397,8 +399,6 @@ static int atmel_qspi_set_cfg(struct atmel_qspi *aq, if (op->data.nbytes && op->data.dir == SPI_MEM_DATA_OUT) ifr |= QSPI_IFR_SAMA5D2_WRITE_TRSFR; - /* Set QSPI Instruction Frame registers */ - atmel_qspi_write(iar, aq, QSPI_IAR); atmel_qspi_write(icr, aq, QSPI_ICR); atmel_qspi_write(ifr, aq, QSPI_IFR); } -- 2.25.1