From nobody Tue Apr 7 10:39:52 2026 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 C6AFEECAAD2 for ; Mon, 29 Aug 2022 09:07:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229738AbiH2JHw (ORCPT ); Mon, 29 Aug 2022 05:07:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57718 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229644AbiH2JHt (ORCPT ); Mon, 29 Aug 2022 05:07:49 -0400 Received: from NAM12-MW2-obe.outbound.protection.outlook.com (mail-mw2nam12on2043.outbound.protection.outlook.com [40.107.244.43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 960B01AF0A; Mon, 29 Aug 2022 02:07:47 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=J32Q+BCew67rjCC0q1kUjdIFYQcV5L/gqgPC+UBLSblV+DUvhH+w0GDtuPYFANX9cL9iDzb+BZVX0lXFz1wSrYLAhu0oZXtXEWPBM+E2BOizvj+Zm3GfgtY4349TqC0HR4QpkF9M42FSf+Hx1Fc+bjS0pH1r+GFPuv88H4YaUOPFjNvUEnkGC+fQDVBD0J5Qp4Xw2iL3/JJ4kdoS1LEPGtZibDQ66BRX9NYv8sJkMjUP8rAypYWjvlrDfXnlK5tA7hQ+LSEv9DVbbYKXoQ2ZaEAaHr5Y+AQ7/y8UOChOPS4wjrs/dzGXbOPCfVcy9vA1diqFwNvGDg8TMsINyglW6Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=Gb/cGjwYUwlzM+AZmAhFpKRjYIzyJn560lc74ov6OKM=; b=EuYUpqTUWZavRldXA9aQ+qghs3ZiXMPOb8FUmJDvREOgJXxzv1FjZp54oX4rPpPEajqRzf3C9Cz5i22QeVYXJXPqyILQMGTTOVpmF7A45eOZw/arIzvcFFuCVXb8JOxxx9/6IlSq1VyZ3EUAE1FmVdE/UDiRn6mm9XLjD6UBsI6MyE4YGmTwT3t1qGv1A5iq5yy5uMvNKwRotTNCmhkQ/lFrCg9vA/O//zG6pVzCMBD4N2289mRhNqzei0+uqZuZUZdOssI/ORpJYOaAwzhfv52h2hSpabjqUETcg/AnsrBB0nfymClUBkm6CD0snaD1WbRxI0530Y0C5qm5zTXr/A== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=microchip.com smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Gb/cGjwYUwlzM+AZmAhFpKRjYIzyJn560lc74ov6OKM=; b=z50dD7LFDH0YxS0qcQX0Bv9QOj5l3hL45KfPXbmrpe+TMd4GR/yhYBaKB93h3j9MjyVUHB4u4+TFiVGt1f/faPIStjNL2Bce2Iav20SVyiRf17cuhL7Ce8DTdUHbI6/L+kWO0qJwdmRsAY/j+B8Ex4ueG67AeOp/TbajvwA0kCI= Received: from DM6PR07CA0091.namprd07.prod.outlook.com (2603:10b6:5:337::24) by MWHPR12MB1535.namprd12.prod.outlook.com (2603:10b6:301:5::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5566.15; Mon, 29 Aug 2022 09:07:44 +0000 Received: from DM6NAM11FT028.eop-nam11.prod.protection.outlook.com (2603:10b6:5:337:cafe::96) by DM6PR07CA0091.outlook.office365.com (2603:10b6:5:337::24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5566.15 via Frontend Transport; Mon, 29 Aug 2022 09:07:44 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB03.amd.com; pr=C Received: from SATLEXMB03.amd.com (165.204.84.17) by DM6NAM11FT028.mail.protection.outlook.com (10.13.173.140) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.5566.15 via Frontend Transport; Mon, 29 Aug 2022 09:07:43 +0000 Received: from SATLEXMB06.amd.com (10.181.40.147) by SATLEXMB03.amd.com (10.181.40.144) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.28; Mon, 29 Aug 2022 04:07:43 -0500 Received: from SATLEXMB04.amd.com (10.181.40.145) by SATLEXMB06.amd.com (10.181.40.147) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.28; Mon, 29 Aug 2022 04:07:42 -0500 Received: from xhdlakshmis40.xilinx.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server id 15.1.2375.28 via Frontend Transport; Mon, 29 Aug 2022 04:07:38 -0500 From: Sai Krishna Potthuri To: Tudor Ambarus , Pratyush Yadav , Michael Walle , Miquel Raynal , Richard Weinberger , "Vignesh Raghavendra" , Rob Herring , "Krzysztof Kozlowski" CC: , , , , , Sai Krishna Potthuri Subject: [PATCH 1/2] dt-bindings: mtd: spi-nor: Add reset-gpios property Date: Mon, 29 Aug 2022 14:35:27 +0530 Message-ID: <20220829090528.21613-2-sai.krishna.potthuri@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220829090528.21613-1-sai.krishna.potthuri@amd.com> References: <20220829090528.21613-1-sai.krishna.potthuri@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 5b579499-560f-46fa-263a-08da899def1a X-MS-TrafficTypeDiagnostic: MWHPR12MB1535:EE_ X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB03.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230016)(4636009)(39860400002)(376002)(346002)(396003)(136003)(46966006)(36840700001)(40470700004)(82310400005)(2906002)(4326008)(7416002)(40480700001)(4744005)(8676002)(70586007)(70206006)(110136005)(6666004)(26005)(316002)(54906003)(103116003)(41300700001)(478600001)(8936002)(81166007)(86362001)(426003)(40460700003)(36860700001)(336012)(186003)(47076005)(1076003)(356005)(2616005)(5660300002)(36756003)(82740400003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Aug 2022 09:07:43.9748 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5b579499-560f-46fa-263a-08da899def1a X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT028.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR12MB1535 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" SPI-NOR flashes have RESET pin which can be toggled using GPIO controller, for those platforms reset-gpios property can be used to reset the flash device. Signed-off-by: Sai Krishna Potthuri --- Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml b/Doc= umentation/devicetree/bindings/mtd/jedec,spi-nor.yaml index 7149784a36ac..d2fc8e9c787f 100644 --- a/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml +++ b/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml @@ -70,6 +70,12 @@ properties: be used on such systems, to denote the absence of a reliable reset mechanism. =20 + reset-gpios: + description: + contains a GPIO specifier. The reset GPIO is asserted and then deass= erted + to perform device reset. If "broken-flash-reset" is present then hav= ing + this property does not make any difference. + partitions: type: object =20 --=20 2.17.1 From nobody Tue Apr 7 10:39:52 2026 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 390EFECAAD4 for ; Mon, 29 Aug 2022 09:07:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229788AbiH2JH4 (ORCPT ); Mon, 29 Aug 2022 05:07:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57864 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229753AbiH2JHy (ORCPT ); Mon, 29 Aug 2022 05:07:54 -0400 Received: from NAM11-BN8-obe.outbound.protection.outlook.com (mail-bn8nam11on2041.outbound.protection.outlook.com [40.107.236.41]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 290225A3E0; Mon, 29 Aug 2022 02:07:51 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=m7E31BTVROVBkKuFghetz0LsruS56JBY7bMaj97RghYOYpCOC/U9uYf+cSSTf1M0tm2p5Iv6JmnL35xxMbONNiI4L/aQv38X/Elmed/eu7ANHyeSHlw+QxbHbO2lHgmPxDTjVgjcVkDMS1/qcKudZAVHho4pw+jKBYkNbjAlk60cRXRflqBU9THPZ7xjlP/ZSI8XfZn9+PN1plT8Td8CYLH6avXQk3B203xcavAmPRZ8V0Kas21K7YMCPICiu71gxUdLWRwoAmmxsey8Bq735BYodDns7IKmsRY26KUjDSoQ4yHKVBhP2o7yZQogucuiHwGHfK65SBgwPRSjbTbpbQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=iricBOBzoY1WwMW7yzfbWUiI0VpUxM2vxiZEsNYkp9M=; b=F6xd5TzSqCpRfKB9N1wx97OQ3uERWTf3UdyMk9nD3CIGWx9o5dbuHmyWeoj68jXm50Rm+MOp67HPqEVpwlTKoaJE/DTMVnVM8ZJwVNpznICsf5nXh0AzdSxc9b7o8b9TD1fj0bUDGJXR0VCK3La1sAWuI+GyZSni8j/vbUn/Cq9z05bXnoqVzDX1bg+aWoIQs+iPijOGvepD5wm61K+M7fUzcWuOHrLcTAzuu04MwhVwRc/ghz1W/yFdO0S29NlJNz8BiCY38Q0GXRmwI163c1h5hXSf6KTauIri4rXMPr8NRacqYNr0CTxi+kjshcQbQaVSjFovkYHCpnk/255fTg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=microchip.com smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=iricBOBzoY1WwMW7yzfbWUiI0VpUxM2vxiZEsNYkp9M=; b=icQWxCyNBYResEsf+JjSdDrjMz/vAvMMXGC3tUb/j41DUxGtE6e41q7kVBNQVuuRjv57F6tNa68tKgXMoRiDaJ6ospfzsoPsUaGtx4qYX9vOnY/b3AKNMs+qGgmUao1rJXlLEARw9FFQ/V0rBbeniAeBHpnf7/OxIw0tMzPgJZg= Received: from DS7PR05CA0094.namprd05.prod.outlook.com (2603:10b6:8:56::11) by BN8PR12MB3249.namprd12.prod.outlook.com (2603:10b6:408:68::28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5566.16; Mon, 29 Aug 2022 09:07:48 +0000 Received: from DM6NAM11FT083.eop-nam11.prod.protection.outlook.com (2603:10b6:8:56:cafe::cc) by DS7PR05CA0094.outlook.office365.com (2603:10b6:8:56::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5588.3 via Frontend Transport; Mon, 29 Aug 2022 09:07:48 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB03.amd.com; pr=C Received: from SATLEXMB03.amd.com (165.204.84.17) by DM6NAM11FT083.mail.protection.outlook.com (10.13.173.97) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.5566.15 via Frontend Transport; Mon, 29 Aug 2022 09:07:48 +0000 Received: from SATLEXMB04.amd.com (10.181.40.145) by SATLEXMB03.amd.com (10.181.40.144) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.28; Mon, 29 Aug 2022 04:07:47 -0500 Received: from xhdlakshmis40.xilinx.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server id 15.1.2375.28 via Frontend Transport; Mon, 29 Aug 2022 04:07:43 -0500 From: Sai Krishna Potthuri To: Tudor Ambarus , Pratyush Yadav , Michael Walle , Miquel Raynal , Richard Weinberger , "Vignesh Raghavendra" , Rob Herring , "Krzysztof Kozlowski" CC: , , , , , Sai Krishna Potthuri Subject: [PATCH 2/2] mtd: spi-nor: Add support for flash reset Date: Mon, 29 Aug 2022 14:35:28 +0530 Message-ID: <20220829090528.21613-3-sai.krishna.potthuri@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220829090528.21613-1-sai.krishna.potthuri@amd.com> References: <20220829090528.21613-1-sai.krishna.potthuri@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 3ba322f8-e52a-4681-12a9-08da899df1c0 X-MS-TrafficTypeDiagnostic: BN8PR12MB3249:EE_ X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB03.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230016)(4636009)(376002)(396003)(39860400002)(136003)(346002)(40470700004)(46966006)(36840700001)(7416002)(86362001)(70206006)(26005)(82310400005)(478600001)(6666004)(41300700001)(336012)(186003)(82740400003)(356005)(40480700001)(40460700003)(81166007)(83380400001)(1076003)(426003)(2616005)(47076005)(36860700001)(110136005)(5660300002)(8676002)(8936002)(4326008)(54906003)(2906002)(36756003)(316002)(103116003)(70586007)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Aug 2022 09:07:48.4176 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3ba322f8-e52a-4681-12a9-08da899df1c0 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT083.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN8PR12MB3249 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add support for spi-nor flash reset via GPIO controller by reading the reset-gpio property. If there is a valid GPIO specifier then reset will be performed by asserting and deasserting the GPIO using gpiod APIs otherwise it will not perform any operation. Signed-off-by: Sai Krishna Potthuri --- drivers/mtd/spi-nor/core.c | 50 +++++++++++++++++++++++++++++++++++--- 1 file changed, 46 insertions(+), 4 deletions(-) diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c index f2c64006f8d7..d4703ff69ad0 100644 --- a/drivers/mtd/spi-nor/core.c +++ b/drivers/mtd/spi-nor/core.c @@ -2401,12 +2401,8 @@ static void spi_nor_no_sfdp_init_params(struct spi_n= or *nor) */ static void spi_nor_init_flags(struct spi_nor *nor) { - struct device_node *np =3D spi_nor_get_flash_node(nor); const u16 flags =3D nor->info->flags; =20 - if (of_property_read_bool(np, "broken-flash-reset")) - nor->flags |=3D SNOR_F_BROKEN_RESET; - if (flags & SPI_NOR_SWP_IS_VOLATILE) nor->flags |=3D SNOR_F_SWP_IS_VOLATILE; =20 @@ -2933,9 +2929,47 @@ static void spi_nor_set_mtd_info(struct spi_nor *nor) mtd->_put_device =3D spi_nor_put_device; } =20 +static int spi_nor_hw_reset(struct spi_nor *nor) +{ + struct gpio_desc *reset; + int ret; + + reset =3D devm_gpiod_get_optional(nor->dev, "reset", GPIOD_ASIS); + if (IS_ERR_OR_NULL(reset)) + return PTR_ERR_OR_ZERO(reset); + + /* Set the direction as output and enable the output */ + ret =3D gpiod_direction_output(reset, 1); + if (ret) + return ret; + + /* + * Experimental Minimum Chip select high to Reset delay value + * based on the flash device spec. + */ + usleep_range(1, 5); + gpiod_set_value(reset, 0); + + /* + * Experimental Minimum Reset pulse width value based on the + * flash device spec. + */ + usleep_range(10, 15); + gpiod_set_value(reset, 1); + + /* + * Experimental Minimum Reset recovery delay value based on the + * flash device spec. + */ + usleep_range(35, 40); + + return 0; +} + int spi_nor_scan(struct spi_nor *nor, const char *name, const struct spi_nor_hwcaps *hwcaps) { + struct device_node *np =3D spi_nor_get_flash_node(nor); const struct flash_info *info; struct device *dev =3D nor->dev; struct mtd_info *mtd =3D &nor->mtd; @@ -2965,6 +2999,14 @@ int spi_nor_scan(struct spi_nor *nor, const char *na= me, if (!nor->bouncebuf) return -ENOMEM; =20 + if (of_property_read_bool(np, "broken-flash-reset")) { + nor->flags |=3D SNOR_F_BROKEN_RESET; + } else { + ret =3D spi_nor_hw_reset(nor); + if (ret) + return ret; + } + info =3D spi_nor_get_flash_info(nor, name); if (IS_ERR(info)) return PTR_ERR(info); --=20 2.17.1