mtk-efuse.c (6ea24cf79e055f0a62a64baa8587e2254a493c7b) mtk-efuse.c (ba360fd040e3417ed1d90e89d681698f82002207)
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>
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/io.h>
17#include <linux/nvmem-provider.h>
18#include <linux/platform_device.h>
18#include <linux/nvmem-provider.h>
19#include <linux/platform_device.h>
19#include <linux/regmap.h>
20
20
21static struct regmap_config mtk_regmap_config = {
22 .reg_bits = 32,
23 .val_bits = 32,
24 .reg_stride = 4,
25};
21static int mtk_reg_read(void *context,
22 unsigned int reg, void *_val, size_t bytes)
23{
24 void __iomem *base = context;
25 u32 *val = _val;
26 int i = 0, words = bytes / 4;
26
27
28 while (words--)
29 *val++ = readl(base + reg + (i++ * 4));
30
31 return 0;
32}
33
34static int mtk_reg_write(void *context,
35 unsigned int reg, void *_val, size_t bytes)
36{
37 void __iomem *base = context;
38 u32 *val = _val;
39 int i = 0, words = bytes / 4;
40
41 while (words--)
42 writel(*val++, base + reg + (i++ * 4));
43
44 return 0;
45}
46
27static 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;
47static int mtk_efuse_probe(struct platform_device *pdev)
48{
49 struct device *dev = &pdev->dev;
50 struct resource *res;
51 struct nvmem_device *nvmem;
52 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
53 void __iomem *base;
54
55 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
56 base = devm_ioremap_resource(dev, res);
57 if (IS_ERR(base))
58 return PTR_ERR(base);
59
60 econfig = devm_kzalloc(dev, sizeof(*econfig), GFP_KERNEL);
61 if (!econfig)
62 return -ENOMEM;
63
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
64 econfig->stride = 4;
65 econfig->word_size = 4;
66 econfig->reg_read = mtk_reg_read;
67 econfig->reg_write = mtk_reg_write;
68 econfig->size = resource_size(res);
69 econfig->priv = base;
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

--- 50 unchanged lines hidden --- 		70 econfig->dev = dev;
71 econfig->owner = THIS_MODULE;
72 nvmem = nvmem_register(econfig);
73 if (IS_ERR(nvmem))
74 return PTR_ERR(nvmem);
75
76 platform_set_drvdata(pdev, nvmem);
77

--- 50 unchanged lines hidden ---