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1 | /* |
2 | * Anatop MFD driver | |
3 | * | |
4 | * Copyright (C) 2012 Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org> | |
5 | * Copyright (C) 2012 Linaro | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License along | |
18 | * with this program; if not, write to the Free Software Foundation, Inc., | |
19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
20 | * This program is free software; you can redistribute it and/or modify | |
21 | * it under the terms of the GNU General Public License as published by | |
22 | * the Free Software Foundation; either version 2 of the License, or | |
23 | * (at your option) any later version. | |
24 | * | |
25 | * This program is distributed in the hope that it will be useful, | |
26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
28 | * GNU General Public License for more details. | |
29 | * | |
30 | * You should have received a copy of the GNU General Public License along | |
31 | * with this program; if not, write to the Free Software Foundation, Inc., | |
32 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
33 | * | |
34 | */ | |
35 | ||
36 | #include <linux/io.h> | |
37 | #include <linux/module.h> | |
38 | #include <linux/platform_device.h> | |
39 | #include <linux/of.h> | |
40 | #include <linux/of_platform.h> | |
41 | #include <linux/of_address.h> | |
42 | #include <linux/mfd/anatop.h> | |
43 | ||
b09530ef | 44 | u32 anatop_read_reg(struct anatop *adata, u32 addr) |
75060a1d | 45 | { |
b09530ef | 46 | return readl(adata->ioreg + addr); |
75060a1d | 47 | } |
b09530ef | 48 | EXPORT_SYMBOL_GPL(anatop_read_reg); |
75060a1d | 49 | |
b09530ef | 50 | void anatop_write_reg(struct anatop *adata, u32 addr, u32 data, u32 mask) |
75060a1d | 51 | { |
b09530ef | 52 | u32 val; |
75060a1d | 53 | |
b09530ef | 54 | data &= mask; |
75060a1d YCLP |
55 | |
56 | spin_lock(&adata->reglock); | |
b09530ef RZ |
57 | val = readl(adata->ioreg + addr); |
58 | val &= ~mask; | |
59 | val |= data; | |
60 | writel(val, adata->ioreg + addr); | |
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61 | spin_unlock(&adata->reglock); |
62 | } | |
b09530ef | 63 | EXPORT_SYMBOL_GPL(anatop_write_reg); |
75060a1d YCLP |
64 | |
65 | static const struct of_device_id of_anatop_match[] = { | |
66 | { .compatible = "fsl,imx6q-anatop", }, | |
67 | { }, | |
68 | }; | |
69 | ||
70 | static int __devinit of_anatop_probe(struct platform_device *pdev) | |
71 | { | |
72 | struct device *dev = &pdev->dev; | |
73 | struct device_node *np = dev->of_node; | |
74 | void *ioreg; | |
75 | struct anatop *drvdata; | |
76 | ||
77 | ioreg = of_iomap(np, 0); | |
78 | if (!ioreg) | |
79 | return -EADDRNOTAVAIL; | |
80 | drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); | |
81 | if (!drvdata) | |
82 | return -ENOMEM; | |
83 | drvdata->ioreg = ioreg; | |
84 | spin_lock_init(&drvdata->reglock); | |
85 | platform_set_drvdata(pdev, drvdata); | |
86 | of_platform_populate(np, of_anatop_match, NULL, dev); | |
87 | ||
88 | return 0; | |
89 | } | |
90 | ||
91 | static int __devexit of_anatop_remove(struct platform_device *pdev) | |
92 | { | |
93 | struct anatop *drvdata; | |
94 | drvdata = platform_get_drvdata(pdev); | |
95 | iounmap(drvdata->ioreg); | |
96 | ||
97 | return 0; | |
98 | } | |
99 | ||
100 | static struct platform_driver anatop_of_driver = { | |
101 | .driver = { | |
102 | .name = "anatop-mfd", | |
103 | .owner = THIS_MODULE, | |
104 | .of_match_table = of_anatop_match, | |
105 | }, | |
106 | .probe = of_anatop_probe, | |
107 | .remove = of_anatop_remove, | |
108 | }; | |
109 | ||
110 | static int __init anatop_init(void) | |
111 | { | |
112 | return platform_driver_register(&anatop_of_driver); | |
113 | } | |
114 | postcore_initcall(anatop_init); | |
115 | ||
116 | static void __exit anatop_exit(void) | |
117 | { | |
118 | platform_driver_unregister(&anatop_of_driver); | |
119 | } | |
120 | module_exit(anatop_exit); | |
121 | ||
122 | MODULE_AUTHOR("Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>"); | |
123 | MODULE_DESCRIPTION("ANATOP MFD driver"); | |
124 | MODULE_LICENSE("GPL v2"); |