/* SPDX-License-Identifier: GPL-2.0 OR MIT */ /* Copyright 2022 Innovative Advantage Inc. */ #ifndef _LINUX_MFD_OCELOT_H #define _LINUX_MFD_OCELOT_H #include <linux/err.h> #include <linux/errno.h> #include <linux/ioport.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/types.h> struct resource; static inline struct regmap * ocelot_regmap_from_resource_optional(struct platform_device *pdev, unsigned int index, const struct regmap_config *config) { struct device *dev = &pdev->dev; struct resource *res; void __iomem *regs; /* * Don't use _get_and_ioremap_resource() here, since that will invoke * prints of "invalid resource" which will simply add confusion. */ res = platform_get_resource(pdev, IORESOURCE_MEM, index); if (res) { regs = devm_ioremap_resource(dev, res); if (IS_ERR(regs)) return ERR_CAST(regs); return devm_regmap_init_mmio(dev, regs, config); } /* * Fall back to using REG and getting the resource from the parent * device, which is possible in an MFD configuration */ if (dev->parent) { res = platform_get_resource(pdev, IORESOURCE_REG, index); if (!res) return NULL; return dev_get_regmap(dev->parent, res->name); } return NULL; } static inline struct regmap * ocelot_regmap_from_resource(struct platform_device *pdev, unsigned int index, const struct regmap_config *config) { struct regmap *map; map = ocelot_regmap_from_resource_optional(pdev, index, config); return map ?: ERR_PTR(-ENOENT); } #endif