mfd: Use to_platform_device instead of container_of
[linux-2.6.git] / drivers / mfd / mfd-core.c
1 /*
2  * drivers/mfd/mfd-core.c
3  *
4  * core MFD support
5  * Copyright (c) 2006 Ian Molton
6  * Copyright (c) 2007,2008 Dmitry Baryshkov
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  *
12  */
13
14 #include <linux/kernel.h>
15 #include <linux/platform_device.h>
16 #include <linux/mfd/core.h>
17
18 static int mfd_add_device(struct platform_device *parent,
19                 const struct mfd_cell *cell,
20                 struct resource *mem_base,
21                 int irq_base)
22 {
23         struct resource res[cell->num_resources];
24         struct platform_device *pdev;
25         int ret = -ENOMEM;
26         int r;
27
28         pdev = platform_device_alloc(cell->name, parent->id);
29         if (!pdev)
30                 goto fail_alloc;
31
32         pdev->dev.parent = &parent->dev;
33
34         ret = platform_device_add_data(pdev,
35                         cell, sizeof(struct mfd_cell));
36         if (ret)
37                 goto fail_device;
38
39         memset(res, 0, sizeof(res));
40         for (r = 0; r < cell->num_resources; r++) {
41                 res[r].name = cell->resources[r].name;
42                 res[r].flags = cell->resources[r].flags;
43
44                 /* Find out base to use */
45                 if (cell->resources[r].flags & IORESOURCE_MEM) {
46                         res[r].parent = mem_base;
47                         res[r].start = mem_base->start +
48                                 cell->resources[r].start;
49                         res[r].end = mem_base->start +
50                                 cell->resources[r].end;
51                 } else if (cell->resources[r].flags & IORESOURCE_IRQ) {
52                         res[r].start = irq_base +
53                                 cell->resources[r].start;
54                         res[r].end   = irq_base +
55                                 cell->resources[r].end;
56                 } else {
57                         res[r].parent = cell->resources[r].parent;
58                         res[r].start = cell->resources[r].start;
59                         res[r].end   = cell->resources[r].end;
60                 }
61         }
62
63         platform_device_add_resources(pdev, res, cell->num_resources);
64
65         ret = platform_device_add(pdev);
66         if (ret)
67                 goto fail_device;
68
69         return 0;
70
71 /*      platform_device_del(pdev); */
72 fail_device:
73         platform_device_put(pdev);
74 fail_alloc:
75         return ret;
76 }
77
78 int mfd_add_devices(
79                 struct platform_device *parent,
80                 const struct mfd_cell *cells, int n_devs,
81                 struct resource *mem_base,
82                 int irq_base)
83 {
84         int i;
85         int ret = 0;
86
87         for (i = 0; i < n_devs; i++) {
88                 ret = mfd_add_device(parent, cells + i, mem_base, irq_base);
89                 if (ret)
90                         break;
91         }
92
93         if (ret)
94                 mfd_remove_devices(parent);
95
96         return ret;
97 }
98 EXPORT_SYMBOL(mfd_add_devices);
99
100 static int mfd_remove_devices_fn(struct device *dev, void *unused)
101 {
102         platform_device_unregister(to_platform_device(dev));
103         return 0;
104 }
105
106 void mfd_remove_devices(struct platform_device *parent)
107 {
108         device_for_each_child(&parent->dev, NULL, mfd_remove_devices_fn);
109 }
110 EXPORT_SYMBOL(mfd_remove_devices);
111
112 MODULE_LICENSE("GPL");
113 MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov");