forked from luck/tmp_suning_uos_patched
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>
112 lines
2.4 KiB
C
112 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2015 MediaTek Inc.
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* Author: Andrew-CT Chen <andrew-ct.chen@mediatek.com>
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*/
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/io.h>
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#include <linux/nvmem-provider.h>
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#include <linux/platform_device.h>
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struct mtk_efuse_priv {
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void __iomem *base;
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};
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static int mtk_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 mtk_efuse_priv *priv = context;
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u32 *val = _val;
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int i = 0, words = bytes / 4;
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while (words--)
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*val++ = readl(priv->base + reg + (i++ * 4));
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return 0;
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}
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static int mtk_reg_write(void *context,
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unsigned int reg, void *_val, size_t bytes)
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{
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struct mtk_efuse_priv *priv = context;
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u32 *val = _val;
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int i = 0, words = bytes / 4;
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while (words--)
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writel(*val++, priv->base + reg + (i++ * 4));
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return 0;
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}
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static int mtk_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 mtk_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 = 4;
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econfig.word_size = 4;
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econfig.reg_read = mtk_reg_read;
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econfig.reg_write = mtk_reg_write;
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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 mtk_efuse_of_match[] = {
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{ .compatible = "mediatek,mt8173-efuse",},
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{ .compatible = "mediatek,efuse",},
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{/* sentinel */},
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};
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MODULE_DEVICE_TABLE(of, mtk_efuse_of_match);
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static struct platform_driver mtk_efuse_driver = {
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.probe = mtk_efuse_probe,
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.driver = {
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.name = "mediatek,efuse",
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.of_match_table = mtk_efuse_of_match,
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},
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};
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static int __init mtk_efuse_init(void)
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{
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int ret;
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ret = platform_driver_register(&mtk_efuse_driver);
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if (ret) {
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pr_err("Failed to register efuse driver\n");
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return ret;
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}
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return 0;
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}
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static void __exit mtk_efuse_exit(void)
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{
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return platform_driver_unregister(&mtk_efuse_driver);
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}
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subsys_initcall(mtk_efuse_init);
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module_exit(mtk_efuse_exit);
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MODULE_AUTHOR("Andrew-CT Chen <andrew-ct.chen@mediatek.com>");
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MODULE_DESCRIPTION("Mediatek EFUSE driver");
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MODULE_LICENSE("GPL v2");
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