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