blob: 0454be4266c1cf7371dd359b9839c09fcb126f7d [file] [log] [blame]
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +01001/*
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
18static 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
Andrew Mortonc82dd532008-07-25 01:45:22 -070039 memset(res, 0, sizeof(res));
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +010040 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); */
72fail_device:
73 platform_device_put(pdev);
74fail_alloc:
75 return ret;
76}
77
78int 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}
98EXPORT_SYMBOL(mfd_add_devices);
99
100static int mfd_remove_devices_fn(struct device *dev, void *unused)
101{
102 platform_device_unregister(
103 container_of(dev, struct platform_device, dev));
104 return 0;
105}
106
107void mfd_remove_devices(struct platform_device *parent)
108{
109 device_for_each_child(&parent->dev, NULL, mfd_remove_devices_fn);
110}
111EXPORT_SYMBOL(mfd_remove_devices);
112
113MODULE_LICENSE("GPL");
114MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov");