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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 v10 net-next 1/7] mfd: ocelot: add helper to get regmap from a resource Date: Fri, 10 Jun 2022 13:23:24 -0700 Message-Id: <20220610202330.799510-2-colin.foster@in-advantage.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220610202330.799510-1-colin.foster@in-advantage.com> References: <20220610202330.799510-1-colin.foster@in-advantage.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: MW4PR04CA0246.namprd04.prod.outlook.com (2603:10b6:303:88::11) 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: 409485c7-5b1b-40f5-d8c0-08da4b1f1e91 X-MS-TrafficTypeDiagnostic: MWHPR10MB1629:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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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 | 22 ++++++++++++++++++++++ 2 files changed, 27 insertions(+) create mode 100644 include/linux/mfd/ocelot.h diff --git a/MAINTAINERS b/MAINTAINERS index 033a01b07f8f..91b4151c5ad1 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14352,6 +14352,11 @@ 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..40e775f1143f --- /dev/null +++ b/include/linux/mfd/ocelot.h @@ -0,0 +1,22 @@ +/* SPDX-License-Identifier: GPL-2.0 OR MIT */ +/* Copyright 2022 Innovative Advantage Inc. */ + +#include +#include +#include + +static inline void +ocelot_platform_init_regmap_from_resource(struct platform_device *pdev, + unsigned int index, + struct regmap **map, + struct resource **res, + const struct regmap_config *config); +{ + u32 __iomem *regs = + devm_platform_get_and_ioremap_resource(pdev, index, res); + + if (!IS_ERR(regs)) + *map = devm_regmap_init_mmio(&pdev->dev, regs, config); + else + *map = ERR_PTR(ENODEV); +} -- 2.25.1