projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 4c7e4fe3 ACC |
1 | /* |
| 2 | * Copyright (c) 2015 MediaTek Inc. | |
| 3 | * Author: Andrew-CT Chen <andrew-ct.chen@mediatek.com> | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or modify | |
| 6 | * it under the terms of the GNU General Public License version 2 as | |
| 7 | * published by the Free Software Foundation. | |
| 8 | * | |
| 9 | * This program is distributed in the hope that it will be useful, | |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 | * GNU General Public License for more details. | |
| 13 | */ | |
| 14 | ||
| 15 | #include <linux/device.h> | |
| 16 | #include <linux/module.h> | |
| 17 | #include <linux/nvmem-provider.h> | |
| 18 | #include <linux/platform_device.h> | |
| 19 | #include <linux/regmap.h> | |
| 20 | ||
| 21 | static struct regmap_config mtk_regmap_config = { | |
| 22 | .reg_bits = 32, | |
| 23 | .val_bits = 32, | |
| 24 | .reg_stride = 4, | |
| 25 | }; | |
| 26 | ||
| 27 | static int mtk_efuse_probe(struct platform_device *pdev) | |
| 28 | { | |
| 29 | struct device *dev = &pdev->dev; | |
| 30 | struct resource *res; | |
| 31 | struct nvmem_device *nvmem; | |
| 32 | struct nvmem_config *econfig; | |
| 33 | struct regmap *regmap; | |
| 34 | void __iomem *base; | |
| 35 | ||
| 36 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
| 37 | base = devm_ioremap_resource(dev, res); | |
| 38 | if (IS_ERR(base)) | |
| 39 | return PTR_ERR(base); | |
| 40 | ||
| 41 | econfig = devm_kzalloc(dev, sizeof(*econfig), GFP_KERNEL); | |
| 42 | if (!econfig) | |
| 43 | return -ENOMEM; | |
| 44 | ||
| 45 | mtk_regmap_config.max_register = resource_size(res) - 1; | |
| 46 | ||
| 47 | regmap = devm_regmap_init_mmio(dev, base, &mtk_regmap_config); | |
| 48 | if (IS_ERR(regmap)) { | |
| 49 | dev_err(dev, "regmap init failed\n"); | |
| 50 | return PTR_ERR(regmap); | |
| 51 | } | |
| 52 | ||
| 53 | econfig->dev = dev; | |
| 54 | econfig->owner = THIS_MODULE; | |
| 55 | nvmem = nvmem_register(econfig); | |
| 56 | if (IS_ERR(nvmem)) | |
| 57 | return PTR_ERR(nvmem); | |
| 58 | ||
| 59 | platform_set_drvdata(pdev, nvmem); | |
| 60 | ||
| 61 | return 0; | |
| 62 | } | |
| 63 | ||
| 64 | static int mtk_efuse_remove(struct platform_device *pdev) | |
| 65 | { | |
| 66 | struct nvmem_device *nvmem = platform_get_drvdata(pdev); | |
| 67 | ||
| 68 | return nvmem_unregister(nvmem); | |
| 69 | } | |
| 70 | ||
| 71 | static const struct of_device_id mtk_efuse_of_match[] = { | |
| 72 | { .compatible = "mediatek,mt8173-efuse",}, | |
| 73 | { .compatible = "mediatek,efuse",}, | |
| 74 | {/* sentinel */}, | |
| 75 | }; | |
| 76 | MODULE_DEVICE_TABLE(of, mtk_efuse_of_match); | |
| 77 | ||
| 78 | static struct platform_driver mtk_efuse_driver = { | |
| 79 | .probe = mtk_efuse_probe, | |
| 80 | .remove = mtk_efuse_remove, | |
| 81 | .driver = { | |
| 82 | .name = "mediatek,efuse", | |
| 83 | .of_match_table = mtk_efuse_of_match, | |
| 84 | }, | |
| 85 | }; | |
| 86 | module_platform_driver(mtk_efuse_driver); | |
| 87 | MODULE_AUTHOR("Andrew-CT Chen <andrew-ct.chen@mediatek.com>"); | |
| 88 | MODULE_DESCRIPTION("Mediatek EFUSE driver"); | |
| 89 | MODULE_LICENSE("GPL v2"); |