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1802d0beec
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 655 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* UniPhier eFuse driver
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*
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* Copyright (C) 2017 Socionext Inc.
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*/
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#include <linux/device.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/nvmem-provider.h>
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#include <linux/platform_device.h>
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struct uniphier_efuse_priv {
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void __iomem *base;
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};
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static int uniphier_reg_read(void *context,
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unsigned int reg, void *_val, size_t bytes)
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{
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struct uniphier_efuse_priv *priv = context;
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u8 *val = _val;
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int offs;
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for (offs = 0; offs < bytes; offs += sizeof(u8))
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*val++ = readb(priv->base + reg + offs);
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return 0;
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}
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static int uniphier_efuse_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct resource *res;
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struct nvmem_device *nvmem;
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struct nvmem_config econfig = {};
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struct uniphier_efuse_priv *priv;
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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priv->base = devm_ioremap_resource(dev, res);
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if (IS_ERR(priv->base))
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return PTR_ERR(priv->base);
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econfig.stride = 1;
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econfig.word_size = 1;
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econfig.read_only = true;
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econfig.reg_read = uniphier_reg_read;
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econfig.size = resource_size(res);
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econfig.priv = priv;
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econfig.dev = dev;
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nvmem = devm_nvmem_register(dev, &econfig);
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return PTR_ERR_OR_ZERO(nvmem);
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}
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static const struct of_device_id uniphier_efuse_of_match[] = {
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{ .compatible = "socionext,uniphier-efuse",},
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{/* sentinel */},
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};
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MODULE_DEVICE_TABLE(of, uniphier_efuse_of_match);
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static struct platform_driver uniphier_efuse_driver = {
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.probe = uniphier_efuse_probe,
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.driver = {
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.name = "uniphier-efuse",
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.of_match_table = uniphier_efuse_of_match,
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},
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};
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module_platform_driver(uniphier_efuse_driver);
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MODULE_AUTHOR("Keiji Hayashibara <hayashibara.keiji@socionext.com>");
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MODULE_DESCRIPTION("UniPhier eFuse driver");
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MODULE_LICENSE("GPL v2");
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