perf: Do not export power_frequency, but power_start event
[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/acpi.h>
17 #include <linux/mfd/core.h>
18 #include <linux/slab.h>
19
20 static int mfd_add_device(struct device *parent, int id,
21                           const struct mfd_cell *cell,
22                           struct resource *mem_base,
23                           int irq_base)
24 {
25         struct resource *res;
26         struct platform_device *pdev;
27         int ret = -ENOMEM;
28         int r;
29
30         pdev = platform_device_alloc(cell->name, id + cell->id);
31         if (!pdev)
32                 goto fail_alloc;
33
34         res = kzalloc(sizeof(*res) * cell->num_resources, GFP_KERNEL);
35         if (!res)
36                 goto fail_device;
37
38         pdev->dev.parent = parent;
39         platform_set_drvdata(pdev, cell->driver_data);
40
41         if (cell->data_size) {
42                 ret = platform_device_add_data(pdev,
43                                         cell->platform_data, cell->data_size);
44                 if (ret)
45                         goto fail_res;
46         }
47
48         for (r = 0; r < cell->num_resources; r++) {
49                 res[r].name = cell->resources[r].name;
50                 res[r].flags = cell->resources[r].flags;
51
52                 /* Find out base to use */
53                 if ((cell->resources[r].flags & IORESOURCE_MEM) && mem_base) {
54                         res[r].parent = mem_base;
55                         res[r].start = mem_base->start +
56                                 cell->resources[r].start;
57                         res[r].end = mem_base->start +
58                                 cell->resources[r].end;
59                 } else if (cell->resources[r].flags & IORESOURCE_IRQ) {
60                         res[r].start = irq_base +
61                                 cell->resources[r].start;
62                         res[r].end   = irq_base +
63                                 cell->resources[r].end;
64                 } else {
65                         res[r].parent = cell->resources[r].parent;
66                         res[r].start = cell->resources[r].start;
67                         res[r].end   = cell->resources[r].end;
68                 }
69
70                 if (!cell->ignore_resource_conflicts) {
71                         ret = acpi_check_resource_conflict(res);
72                         if (ret)
73                                 goto fail_res;
74                 }
75         }
76
77         ret = platform_device_add_resources(pdev, res, cell->num_resources);
78         if (ret)
79                 goto fail_res;
80
81         ret = platform_device_add(pdev);
82         if (ret)
83                 goto fail_res;
84
85         kfree(res);
86
87         return 0;
88
89 /*      platform_device_del(pdev); */
90 fail_res:
91         kfree(res);
92 fail_device:
93         platform_device_put(pdev);
94 fail_alloc:
95         return ret;
96 }
97
98 int mfd_add_devices(struct device *parent, int id,
99                     const struct mfd_cell *cells, int n_devs,
100                     struct resource *mem_base,
101                     int irq_base)
102 {
103         int i;
104         int ret = 0;
105
106         for (i = 0; i < n_devs; i++) {
107                 ret = mfd_add_device(parent, id, cells + i, mem_base, irq_base);
108                 if (ret)
109                         break;
110         }
111
112         if (ret)
113                 mfd_remove_devices(parent);
114
115         return ret;
116 }
117 EXPORT_SYMBOL(mfd_add_devices);
118
119 static int mfd_remove_devices_fn(struct device *dev, void *unused)
120 {
121         platform_device_unregister(to_platform_device(dev));
122         return 0;
123 }
124
125 void mfd_remove_devices(struct device *parent)
126 {
127         device_for_each_child(parent, NULL, mfd_remove_devices_fn);
128 }
129 EXPORT_SYMBOL(mfd_remove_devices);
130
131 MODULE_LICENSE("GPL");
132 MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov");