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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263/* 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