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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Lars Povlsen , Steen Hegelund , UNGLinuxDriver@microchip.com, Linus Walleij , Wolfram Sang , Terry Bowman , Andy Shevchenko Subject: [PATCH v11 net-next 1/9] mfd: ocelot: add helper to get regmap from a resource Date: Tue, 28 Jun 2022 01:17:01 -0700 Message-Id: <20220628081709.829811-2-colin.foster@in-advantage.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220628081709.829811-1-colin.foster@in-advantage.com> References: <20220628081709.829811-1-colin.foster@in-advantage.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: MW4PR04CA0259.namprd04.prod.outlook.com (2603:10b6:303:88::24) To MWHPR1001MB2351.namprd10.prod.outlook.com (2603:10b6:301:35::37) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: ff154b95-1a82-48b7-391a-08da58dea288 X-MS-TrafficTypeDiagnostic: SJ0PR10MB5891:EE_ X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?/BGrVByW/R2QjXsLj8o1811hAUUrV5BqRoyns5VWlooHj/q3kMRf06EK6Hvh?= =?us-ascii?Q?eu1qf/eI2eD+LNLux9L1mpSTgA+fiMNf83X3Nu7GctIgv9mOGtmmG/byLyWJ?= =?us-ascii?Q?sjlCbv0gM4sdTQ2rmE8W0u2S/ECPW/15n7oQOS0FA1mqYt4ZAHf6xiBXFS88?= =?us-ascii?Q?CRqzYI9HuKGHkljWVjFvPmX5EEZSy9cVUPITAc47KsqRW6xe42ZtJe/7iEJM?= =?us-ascii?Q?QoSoPJWW0LUnd9C1Nld2EDTutBFae7c2g0JsjkOtHJuE4gG11D2NLVp1Xx1W?= =?us-ascii?Q?AFy2efxbckn1RqM9MAoplEqHD8NmHIKBdwz7QLmta1txMbxFogbZMETMltQC?= =?us-ascii?Q?/jer7h2BpP/ag0JQue+xpac8SZhqZh+e6kP/DMmdpQdS3MflXmWpOSogprbI?= =?us-ascii?Q?nFGWuJFnoCO3EPQ/AoUHW0LC1wIFqZMprX9At+vPqlTo2Mf9G482i5vkhi2r?= =?us-ascii?Q?MZiFt3TiMyMfV1yLEIrMXrov1UEx68851R753seGAKp8iSr426qIC6nxiACZ?= =?us-ascii?Q?mOmC3qUYohirjImOCBk1Uj+lV1pRK9rjuU+nUs2+cotnKlr7PPEdsKOnkB+p?= =?us-ascii?Q?wPHBLFnPpBJVuAeBlSxhJ48pXz8fdOVkQpZPvv09ekioAEFqQA1X4usJyOr4?= =?us-ascii?Q?0E27ktkPQKM+YfrFdT6srTXdsOQ7I0XnS0uiFId/fZSSnQSlGQifMPmEsCPj?= =?us-ascii?Q?refNuofU2lHNhsvBhaMPOKCUF5duWWohxKs/VhIBnBXOALJlXU7441jFg3Kf?= =?us-ascii?Q?XiQ0SDaGmp7nzdb5E1U9PSSTcteIuieZi+SAP92G837xGMXFalkG0kHnT1ot?= =?us-ascii?Q?8/ILbNmuM7owNBhKxnehk1vv6Q8W5+uaiDYYDa77PdVfksxSRMwhTUOQA30G?= =?us-ascii?Q?bFA7Tzf1tOEH0Lsv5iDHlJnJlsa8rdOXZnJnpeC/B0KM/Ej6mdo/0IoKjtFK?= =?us-ascii?Q?SIYvWED3Ub4kcfqYtXAiGHXyCBBq29KDqJwnYr/0E+fyRbUyq72HJzhvS8Mm?= =?us-ascii?Q?iejxySAP1YthzWQqqovmdmJJLotdQyCMNl+wcI/n/iVfrzCKGePzoIih/0gy?= =?us-ascii?Q?N+c3yh3cW003AnhqMLdG355VaHcYulsfaLwdA7fD5MPNX2aC0W7C53wkS/ti?= =?us-ascii?Q?bEepk1smpFOfE70wIskDI4iNq3qD6vlAxD7yLg8YgQRkfgiDXQxxzokohQEn?= =?us-ascii?Q?NMbu9L5cV2wKg97LO9Fdb0H5EEQ67NSeaL1BCAVcTqalDMurTKUdO83Z8nNI?= =?us-ascii?Q?uo4OE4oJw3wlF/qTkzGR7fS1ksde7KKjq9uxl9b85TuHmzR+igj5jbPw7K4Z?= =?us-ascii?Q?p5NqC1jvdMg6QdCquRrHVW8jI+z7KBsfMXpjeSgfx5Tisgp55jYOP2alvYqO?= =?us-ascii?Q?UFze5h2eIVaCY2qgMmnRzjXAY0Mr/yQnpjVkbs+wPfBWDPGVPEezi7xuK6F1?= =?us-ascii?Q?vxL6J0mMB9VGmTf5vj8NVyY6LrWFt6orpeCs/8hL9CnybcEknZje9xkigWpe?= =?us-ascii?Q?PjVnZbDJ9nJHxxfBMNHnx1VQc87DMrwFSsEOjto6kBQNsrL7FubqJr1GYvoT?= =?us-ascii?Q?A1QkRV6fMUWc2HBjRdcRkxdPS2GyAm72Rc+ZH7APQ4BMp61QxLVP41/uIp8i?= =?us-ascii?Q?Gg=3D=3D?= X-OriginatorOrg: in-advantage.com X-MS-Exchange-CrossTenant-Network-Message-Id: ff154b95-1a82-48b7-391a-08da58dea288 X-MS-Exchange-CrossTenant-AuthSource: MWHPR1001MB2351.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Jun 2022 08:17:26.0885 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 48e842ca-fbd8-4633-a79d-0c955a7d3aae X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: gN4x9V4T3cqViFmsrpTlPW09MLDoxkq7ooDGKulsBlY3pfwJV9wbVkvxZpVIy7y29jOTK+/UzZuF5D0OTLRmi4q73yel44yj/PE+OR5Q6po= X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR10MB5891 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Several ocelot-related modules are designed for MMIO / regmaps. As such, they often use a combination of devm_platform_get_and_ioremap_resource and devm_regmap_init_mmio. Operating in an MFD might be different, in that it could be memory mapped, or it could be SPI, I2C... In these cases a fallback to use IORESOURCE_REG instead of IORESOURCE_MEM becomes necessary. When this happens, there's redundant logic that needs to be implemented in every driver. In order to avoid this redundancy, utilize a single function that, if the MFD scenario is enabled, will perform this fallback logic. Signed-off-by: Colin Foster --- MAINTAINERS | 5 +++++ include/linux/mfd/ocelot.h | 27 +++++++++++++++++++++++++++ 2 files changed, 32 insertions(+) create mode 100644 include/linux/mfd/ocelot.h diff --git a/MAINTAINERS b/MAINTAINERS index 36f0a205c54a..4d9ccec78f18 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14413,6 +14413,11 @@ F: net/dsa/tag_ocelot.c F: net/dsa/tag_ocelot_8021q.c F: tools/testing/selftests/drivers/net/ocelot/* +OCELOT EXTERNAL SWITCH CONTROL +M: Colin Foster +S: Supported +F: include/linux/mfd/ocelot.h + OCXL (Open Coherent Accelerator Processor Interface OpenCAPI) DRIVER M: Frederic Barrat M: Andrew Donnellan diff --git a/include/linux/mfd/ocelot.h b/include/linux/mfd/ocelot.h new file mode 100644 index 000000000000..5c95e4ee38a6 --- /dev/null +++ b/include/linux/mfd/ocelot.h @@ -0,0 +1,27 @@ +/* SPDX-License-Identifier: GPL-2.0 OR MIT */ +/* Copyright 2022 Innovative Advantage Inc. */ + +#include +#include +#include +#include + +struct resource; + +static inline struct regmap * +ocelot_platform_init_regmap_from_resource(struct platform_device *pdev, + unsigned int index, + const struct regmap_config *config) +{ + struct resource *res; + u32 __iomem *regs; + + regs = devm_platform_get_and_ioremap_resource(pdev, index, &res); + + if (!res) + return ERR_PTR(-ENOENT); + else if (IS_ERR(regs)) + return ERR_CAST(regs); + else + return devm_regmap_init_mmio(&pdev->dev, regs, config); +} -- 2.25.1