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Tue, 14 Jul 2020 07:52:51 +0000 From: Clark Wang To: broonie@kernel.org Cc: linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 4/5] spi: lpspi: handle EPROBE_DEFER when get cs-gpios number Date: Tue, 14 Jul 2020 15:52:50 +0800 Message-Id: <20200714075251.12777-5-xiaoning.wang@nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200714075251.12777-1-xiaoning.wang@nxp.com> References: <20200714075251.12777-1-xiaoning.wang@nxp.com> Content-Type: text/plain X-ClientProxiedBy: SG2PR0401CA0013.apcprd04.prod.outlook.com (2603:1096:3:1::23) To AM6PR04MB5623.eurprd04.prod.outlook.com (2603:10a6:20b:a9::13) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (119.31.174.71) by SG2PR0401CA0013.apcprd04.prod.outlook.com (2603:1096:3:1::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3174.21 via Frontend Transport; Tue, 14 Jul 2020 07:52:49 +0000 X-Mailer: git-send-email 2.17.1 X-Originating-IP: [119.31.174.71] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: a930526f-de59-46ff-4986-08d827cae852 X-MS-TrafficTypeDiagnostic: AM6PR04MB4854: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:3513; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: z60Zbmjh1nkYK+R3FhVj8Rgo3JJ8j1Imzm0ljZ+TybMIgwoG384rWmrEBfKCg0vdfa5W/YXDLr7eg9D4OCuL1L/JHtXar0WwuvNuDrHwmFEND0jZ4EtAgk9H2AErcDnbBowHBkttWA6+ZR57GiStq/PHP02xJEGh9Pax1Sp1nn87aibYUcyUtWAXwPk1OeSyOH+2DLe1iGQgrt+KWxT3jQpIb2H36KsV6ZV8WytDEtGq+4AFbFz4XHKtC7xIAbuKZISoISo3fDMm+AuiUV1tYGPaGfHshcSfg8U4bOeVChfRu65inZfdszDav6vcgH82TBNowxFFeGRwq33iC3QQvCsSx0hkSqy6kh0AfQDWlv/eyToWzmWryPYxL1nIDRxe X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:AM6PR04MB5623.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFTY:;SFS:(4636009)(39860400002)(376002)(366004)(396003)(346002)(136003)(66556008)(8936002)(6666004)(66476007)(66946007)(86362001)(316002)(69590400007)(52116002)(5660300002)(6916009)(8676002)(2616005)(956004)(36756003)(4744005)(6486002)(26005)(1076003)(6512007)(478600001)(2906002)(4326008)(16526019)(6506007)(186003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData: S39qZrTM6iScGjosOGDKJ+oQ7fd1DYWd57I/mCsYIt4W4kFui042Hs/eftC61nat7wJq3HCAyb0ycAmnRA/mhxIWpuEk46MaDdJIxO0I8g8rQQt0v1QTFVKkUVxbGG5LlTD/OzMCcY21kZTYqABFbL6J15luweIEjH2shvTu9yexSdvwoBVTqYse+zjmgzg8puyXc5BNvDWIJX19EnqShnYEgPVGr7GGzxUMZn5wwfaD5ryiJe6HX82JSEjbXAzt8m82grSbrTwBTu7rg3R4PL31NA5OWPVCwMhr8kNxEPJhQMXp82ntLFD8a9K/LOlw4zjL90kXIkRSsPvgNhj3O5qxCFrhVdDLepJqTdFHVrIAwI7J9XuSW7iPDu8prRVBEi83jDUuMK/vhhc98Yalu4znb625MZPl/7ZKtx5MBuzbqEg1DuRlmiE3SHhMlxhNFvZNES4+JtBYDoKtDMzoJCeFdFfsRDGjGujM1FSzjjU= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: a930526f-de59-46ff-4986-08d827cae852 X-MS-Exchange-CrossTenant-AuthSource: AM6PR04MB5623.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Jul 2020 07:52:51.1416 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 3kkkzO9hEHgDSAWz+V/lPl90TjtHN04JiCbL/7MCtGhSKjfQWSUwLefKQeu0Ry4/mel4yehafThStDqWWP66GA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM6PR04MB4854 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Fabrice Goucem If SPI is probed before the GPIO driver, it may miss the cs-gpio configuration in dtb. Add defer probe handler to wait GPIO driver probe. Signed-off-by: Fabrice Goucem Signed-off-by: Clark Wang --- drivers/spi/spi-fsl-lpspi.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c index 6fb77f0f657a..05b6ecd82974 100644 --- a/drivers/spi/spi-fsl-lpspi.c +++ b/drivers/spi/spi-fsl-lpspi.c @@ -887,6 +887,11 @@ static int fsl_lpspi_probe(struct platform_device *pdev) for (i = 0; i < controller->num_chipselect; i++) { int cs_gpio = of_get_named_gpio(np, "cs-gpios", i); + if (cs_gpio == -EPROBE_DEFER) { + ret = -EPROBE_DEFER; + goto out_controller_put; + } + if (!gpio_is_valid(cs_gpio) && lpspi_platform_info) cs_gpio = lpspi_platform_info->chipselect[i]; -- 2.17.1