From patchwork Thu Sep 9 11:10:05 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas tanure X-Patchwork-Id: 508661 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=-16.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 53A37C433FE for ; Thu, 9 Sep 2021 11:10:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3338A61100 for ; Thu, 9 Sep 2021 11:10:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234960AbhIILLY (ORCPT ); Thu, 9 Sep 2021 07:11:24 -0400 Received: from mx0b-001ae601.pphosted.com ([67.231.152.168]:19056 "EHLO mx0b-001ae601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234932AbhIILLX (ORCPT ); Thu, 9 Sep 2021 07:11:23 -0400 Received: from pps.filterd (m0077474.ppops.net [127.0.0.1]) by mx0b-001ae601.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 1895CKhb012432; Thu, 9 Sep 2021 06:10:11 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cirrus.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=PODMain02222019; bh=b4lv3VySvMZBsmWHH8FJBjD9cy6eaPIRwRdSaXk8zrI=; b=RlFR1aGqYRBHyvpzBuGunFOKTjHhtVadvc3Bey6G5KENEJYKn9RTWEIz9ozNOvRZDtMa bO/KjGA3xXrpBoB10PboEhOhJNpiU5H7A/tdp/qB49/6zP20uaRS1jN2bSzMpoNxyggO avWzk+oCBmk+HbUfB6WZjKVIyj7rg9pgUCNfhCXK/SGjQcUHpCeuQiLOV52nfQSxRRT/ Ll7iV2qeaDHuughs99Uyi/ze1Mni5VXnJPVyFigfDyWt2RUFzpZP8y5/M/xMFS/RSKaH NysHpnpNlc1Hq6O7FEegwse6kKn9+AwLlmtppPahkl7BhgtsVb47QKT6FSJoMSr4JpgB FQ== Received: from ediex01.ad.cirrus.com ([87.246.76.36]) by mx0b-001ae601.pphosted.com with ESMTP id 3ay8n60e5d-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Thu, 09 Sep 2021 06:10:11 -0500 Received: from EDIEX01.ad.cirrus.com (198.61.84.80) by EDIEX01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2242.12; Thu, 9 Sep 2021 12:10:08 +0100 Received: from ediswmail.ad.cirrus.com (198.61.86.93) by EDIEX01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server id 15.1.2242.12 via Frontend Transport; Thu, 9 Sep 2021 12:10:08 +0100 Received: from aryzen.ad.cirrus.com (unknown [198.61.64.231]) by ediswmail.ad.cirrus.com (Postfix) with ESMTP id 81F93B2F; Thu, 9 Sep 2021 11:10:08 +0000 (UTC) From: Lucas Tanure To: Mark Brown , Sanjay R Mehta , Nehal Bakulchandra Shah CC: , , , Lucas Tanure Subject: [PATCH 4/4] spi: amd: Check for idle bus before execute opcode Date: Thu, 9 Sep 2021 12:10:05 +0100 Message-ID: <20210909111005.304101-4-tanureal@opensource.cirrus.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210909111005.304101-1-tanureal@opensource.cirrus.com> References: <20210909111005.304101-1-tanureal@opensource.cirrus.com> MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: LHnOknpLOPQwKaWdrwgOMLHszyLqAocX X-Proofpoint-GUID: LHnOknpLOPQwKaWdrwgOMLHszyLqAocX X-Proofpoint-Spam-Reason: safe Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Check if the bus is not in use before starting the transfer Signed-off-by: Lucas Tanure --- drivers/spi/spi-amd.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-amd.c b/drivers/spi/spi-amd.c index 97838b57871c..99b2b0ccff08 100644 --- a/drivers/spi/spi-amd.c +++ b/drivers/spi/spi-amd.c @@ -115,11 +115,18 @@ static int amd_spi_busy_wait(struct amd_spi *amd_spi) return 0; } -static void amd_spi_execute_opcode(struct amd_spi *amd_spi) +static int amd_spi_execute_opcode(struct amd_spi *amd_spi) { + int ret; + + ret = amd_spi_busy_wait(amd_spi); + if (ret) + return ret; + /* Set ExecuteOpCode bit in the CTRL0 register */ amd_spi_setclear_reg32(amd_spi, AMD_SPI_CTRL0_REG, AMD_SPI_EXEC_CMD, AMD_SPI_EXEC_CMD); - amd_spi_busy_wait(amd_spi); + + return 0; } static int amd_spi_master_setup(struct spi_device *spi)