From patchwork Sat Jan 1 07:42:45 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Apurva Nandan X-Patchwork-Id: 12702073 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 2EDA4C433FE for ; Sat, 1 Jan 2022 07:44:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232127AbiAAHoX (ORCPT ); Sat, 1 Jan 2022 02:44:23 -0500 Received: from fllv0015.ext.ti.com ([198.47.19.141]:41922 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232100AbiAAHoV (ORCPT ); Sat, 1 Jan 2022 02:44:21 -0500 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 2017i6IB103902; Sat, 1 Jan 2022 01:44:06 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1641023046; bh=hsTbhvozs1BNRSIPW4iIPsBoLECSYX0lY7ljDAlqnV4=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=YLulw8v5l9xMwns6j/wiEZvkRU3GWZjqW6kzr6mUcNbHRmBl5QDivD80ITxpTN+o7 byFEtmvbItuxQ1Xm40/ay8SMXFFTvpH05MYNjAIObaXUicdzc5amwoPZT1jv/e9wh0 sDbJiGSHZU+Yv5svSNkdLEBzyVUCBgUDAI9ACk/I= Received: from DLEE104.ent.ti.com (dlee104.ent.ti.com [157.170.170.34]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 2017i6kF040630 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Sat, 1 Jan 2022 01:44:06 -0600 Received: from DLEE110.ent.ti.com (157.170.170.21) by DLEE104.ent.ti.com (157.170.170.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Sat, 1 Jan 2022 01:44:06 -0600 Received: from fllv0039.itg.ti.com (10.64.41.19) by DLEE110.ent.ti.com (157.170.170.21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14 via Frontend Transport; Sat, 1 Jan 2022 01:44:06 -0600 Received: from LT5CD112GSQZ.ent.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id 2017gpwh033162; Sat, 1 Jan 2022 01:44:01 -0600 From: Apurva Nandan To: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Mark Brown , Apurva Nandan , Patrice Chotard , Christophe Kerello , Boris Brezillon , Daniel Palmer , Alexander Lobakin , , , CC: Subject: [PATCH v3 12/17] mtd: spinand: Add mtd_suspend() to disable Octal DTR mode at suspend Date: Sat, 1 Jan 2022 13:12:45 +0530 Message-ID: <20220101074250.14443-13-a-nandan@ti.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220101074250.14443-1-a-nandan@ti.com> References: <20220101074250.14443-1-a-nandan@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 The flash might or might not have gone a power-down during sleep. Hence, its SPI IO mode is unpredictable for the core at the time of resume. To ensure proper reinitialization during resume, disable the Octal DTR SPI IO mode and bring the flash to 1S-1S-1S mode when performing suspend using mtd_suspend(). Signed-off-by: Apurva Nandan --- drivers/mtd/nand/spi/core.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c index 2fd08085db6f..9d1c72634e5a 100644 --- a/drivers/mtd/nand/spi/core.c +++ b/drivers/mtd/nand/spi/core.c @@ -1307,6 +1307,16 @@ static void spinand_mtd_resume(struct mtd_info *mtd) spinand_ecc_enable(spinand, false); } +static int spinand_mtd_suspend(struct mtd_info *mtd) +{ + struct spinand_device *spinand = mtd_to_spinand(mtd); + + if (spinand->ctrl_ops->protocol == SPINAND_8D_8D_8D) + return spinand_init_octal_dtr_disable(spinand); + + return 0; +} + static int spinand_init(struct spinand_device *spinand) { struct device *dev = &spinand->spimem->spi->dev; @@ -1381,6 +1391,7 @@ static int spinand_init(struct spinand_device *spinand) mtd->_erase = spinand_mtd_erase; mtd->_max_bad_blocks = nanddev_mtd_max_bad_blocks; mtd->_resume = spinand_mtd_resume; + mtd->_suspend = spinand_mtd_suspend; if (nand->ecc.engine) { ret = mtd_ooblayout_count_freebytes(mtd);