From patchwork Wed Jan 25 08:10:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dhruva Gole X-Patchwork-Id: 648406 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 6C4B8C54E94 for ; Wed, 25 Jan 2023 08:11:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234059AbjAYILN (ORCPT ); Wed, 25 Jan 2023 03:11:13 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50312 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232745AbjAYILM (ORCPT ); Wed, 25 Jan 2023 03:11:12 -0500 Received: from lelv0143.ext.ti.com (lelv0143.ext.ti.com [198.47.23.248]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 81AA346733; Wed, 25 Jan 2023 00:11:10 -0800 (PST) Received: from lelv0266.itg.ti.com ([10.180.67.225]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id 30P8As6I011847; Wed, 25 Jan 2023 02:10:54 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1674634254; bh=eNbchGJC+m7Z4S8cdQhmzaRMkS8co3zGkOBT6wpgpHk=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=j7gB/YsZlksX1b4LpewIFD5sKJil4cqsuQtgAiuJkS29kXj67YzEKnfLj+gEuVefd tpNf+27cln3H9Mvu+IH8mRrwlIGgBNWT4Ydbap5Fu03gL1UL+QZ2uHAstWTbCyTLZZ qeFjZX3mZXLkD6VNnSexFwvKxtMTiL7W63uV0vJY= Received: from DFLE114.ent.ti.com (dfle114.ent.ti.com [10.64.6.35]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 30P8AsLI124978 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 25 Jan 2023 02:10:54 -0600 Received: from DFLE110.ent.ti.com (10.64.6.31) by DFLE114.ent.ti.com (10.64.6.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.16; Wed, 25 Jan 2023 02:10:53 -0600 Received: from fllv0039.itg.ti.com (10.64.41.19) by DFLE110.ent.ti.com (10.64.6.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.16 via Frontend Transport; Wed, 25 Jan 2023 02:10:53 -0600 Received: from localhost (ileaxei01-snat2.itg.ti.com [10.180.69.6]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id 30P8Aqag075469; Wed, 25 Jan 2023 02:10:53 -0600 From: Dhruva Gole To: Mark Brown CC: , , Vignesh Raghavendra , Vaishnav Achath , Dhruva Gole , , , , Pratyush Yadav Subject: [PATCH v2 1/4] spi: cadence-quadspi: Reset CMD_CTRL Reg on cmd r/w completion Date: Wed, 25 Jan 2023 13:40:20 +0530 Message-ID: <20230125081023.1573712-2-d-gole@ti.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230125081023.1573712-1-d-gole@ti.com> References: <20230125081023.1573712-1-d-gole@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org If one leaves the CQSPI_REG_CMDCTRL in an unclean state this may cause issues in future command reads. This issue came to light when some flash reads in STIG mode were coming back dirty. Signed-off-by: Dhruva Gole --- drivers/spi/spi-cadence-quadspi.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) -- 2.25.1 diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c index 676313e1bdad..6030da942c6e 100644 --- a/drivers/spi/spi-cadence-quadspi.c +++ b/drivers/spi/spi-cadence-quadspi.c @@ -549,6 +549,9 @@ static int cqspi_command_read(struct cqspi_flash_pdata *f_pdata, memcpy(rxbuf, ®, read_len); } + /* Reset CMD_CTRL Reg once command read completes */ + writel(0, reg_base + CQSPI_REG_CMDCTRL); + return 0; } @@ -613,7 +616,12 @@ static int cqspi_command_write(struct cqspi_flash_pdata *f_pdata, } } - return cqspi_exec_flash_cmd(cqspi, reg); + ret = cqspi_exec_flash_cmd(cqspi, reg); + + /* Reset CMD_CTRL Reg once command write completes */ + writel(0, reg_base + CQSPI_REG_CMDCTRL); + + return ret; } static int cqspi_read_setup(struct cqspi_flash_pdata *f_pdata,