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aa613de6 DB |
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 | ||
424f525a | 18 | static int mfd_add_device(struct device *parent, int id, |
7f71ac93 BD |
19 | const struct mfd_cell *cell, |
20 | struct resource *mem_base, | |
21 | int irq_base) | |
aa613de6 | 22 | { |
a87903f3 | 23 | struct resource *res; |
aa613de6 DB |
24 | struct platform_device *pdev; |
25 | int ret = -ENOMEM; | |
26 | int r; | |
27 | ||
424f525a | 28 | pdev = platform_device_alloc(cell->name, id); |
aa613de6 DB |
29 | if (!pdev) |
30 | goto fail_alloc; | |
31 | ||
a87903f3 IM |
32 | res = kzalloc(sizeof(*res) * cell->num_resources, GFP_KERNEL); |
33 | if (!res) | |
34 | goto fail_device; | |
35 | ||
424f525a | 36 | pdev->dev.parent = parent; |
aa613de6 DB |
37 | |
38 | ret = platform_device_add_data(pdev, | |
56edb58b | 39 | cell->platform_data, cell->data_size); |
aa613de6 | 40 | if (ret) |
a87903f3 | 41 | goto fail_res; |
aa613de6 | 42 | |
aa613de6 DB |
43 | for (r = 0; r < cell->num_resources; r++) { |
44 | res[r].name = cell->resources[r].name; | |
45 | res[r].flags = cell->resources[r].flags; | |
46 | ||
47 | /* Find out base to use */ | |
48 | if (cell->resources[r].flags & IORESOURCE_MEM) { | |
49 | res[r].parent = mem_base; | |
50 | res[r].start = mem_base->start + | |
51 | cell->resources[r].start; | |
52 | res[r].end = mem_base->start + | |
53 | cell->resources[r].end; | |
54 | } else if (cell->resources[r].flags & IORESOURCE_IRQ) { | |
55 | res[r].start = irq_base + | |
56 | cell->resources[r].start; | |
57 | res[r].end = irq_base + | |
58 | cell->resources[r].end; | |
59 | } else { | |
60 | res[r].parent = cell->resources[r].parent; | |
61 | res[r].start = cell->resources[r].start; | |
62 | res[r].end = cell->resources[r].end; | |
63 | } | |
64 | } | |
65 | ||
66 | platform_device_add_resources(pdev, res, cell->num_resources); | |
67 | ||
68 | ret = platform_device_add(pdev); | |
69 | if (ret) | |
a87903f3 IM |
70 | goto fail_res; |
71 | ||
72 | kfree(res); | |
aa613de6 DB |
73 | |
74 | return 0; | |
75 | ||
76 | /* platform_device_del(pdev); */ | |
a87903f3 IM |
77 | fail_res: |
78 | kfree(res); | |
aa613de6 DB |
79 | fail_device: |
80 | platform_device_put(pdev); | |
81 | fail_alloc: | |
82 | return ret; | |
83 | } | |
84 | ||
424f525a | 85 | int mfd_add_devices(struct device *parent, int id, |
7f71ac93 BD |
86 | const struct mfd_cell *cells, int n_devs, |
87 | struct resource *mem_base, | |
88 | int irq_base) | |
aa613de6 DB |
89 | { |
90 | int i; | |
91 | int ret = 0; | |
92 | ||
93 | for (i = 0; i < n_devs; i++) { | |
424f525a | 94 | ret = mfd_add_device(parent, id, cells + i, mem_base, irq_base); |
aa613de6 DB |
95 | if (ret) |
96 | break; | |
97 | } | |
98 | ||
99 | if (ret) | |
100 | mfd_remove_devices(parent); | |
101 | ||
102 | return ret; | |
103 | } | |
104 | EXPORT_SYMBOL(mfd_add_devices); | |
105 | ||
106 | static int mfd_remove_devices_fn(struct device *dev, void *unused) | |
107 | { | |
96ee4199 | 108 | platform_device_unregister(to_platform_device(dev)); |
aa613de6 DB |
109 | return 0; |
110 | } | |
111 | ||
424f525a | 112 | void mfd_remove_devices(struct device *parent) |
aa613de6 | 113 | { |
424f525a | 114 | device_for_each_child(parent, NULL, mfd_remove_devices_fn); |
aa613de6 DB |
115 | } |
116 | EXPORT_SYMBOL(mfd_remove_devices); | |
117 | ||
118 | MODULE_LICENSE("GPL"); | |
119 | MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov"); |