blob: 6c0d1bec4b76c1ab58ae0cbe86cc2539cc3b6375 [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
Dmitry Baryshkov424f5252008-07-29 01:30:26 +020018static int mfd_add_device(struct device *parent, int id,
Ben Dooks7f71ac92008-07-28 18:29:09 +020019 const struct mfd_cell *cell,
20 struct resource *mem_base,
21 int irq_base)
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +010022{
Ian Moltona87903f2008-07-25 22:59:29 +010023 struct resource *res;
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +010024 struct platform_device *pdev;
25 int ret = -ENOMEM;
26 int r;
27
Dmitry Baryshkov424f5252008-07-29 01:30:26 +020028 pdev = platform_device_alloc(cell->name, id);
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +010029 if (!pdev)
30 goto fail_alloc;
31
Ian Moltona87903f2008-07-25 22:59:29 +010032 res = kzalloc(sizeof(*res) * cell->num_resources, GFP_KERNEL);
33 if (!res)
34 goto fail_device;
35
Dmitry Baryshkov424f5252008-07-29 01:30:26 +020036 pdev->dev.parent = parent;
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +010037
38 ret = platform_device_add_data(pdev,
Mike Rapoport56edb582008-07-29 01:23:32 +020039 cell->platform_data, cell->data_size);
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +010040 if (ret)
Ian Moltona87903f2008-07-25 22:59:29 +010041 goto fail_res;
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +010042
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +010043 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)
Ian Moltona87903f2008-07-25 22:59:29 +010070 goto fail_res;
71
72 kfree(res);
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +010073
74 return 0;
75
76/* platform_device_del(pdev); */
Ian Moltona87903f2008-07-25 22:59:29 +010077fail_res:
78 kfree(res);
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +010079fail_device:
80 platform_device_put(pdev);
81fail_alloc:
82 return ret;
83}
84
Dmitry Baryshkov424f5252008-07-29 01:30:26 +020085int mfd_add_devices(struct device *parent, int id,
Ben Dooks7f71ac92008-07-28 18:29:09 +020086 const struct mfd_cell *cells, int n_devs,
87 struct resource *mem_base,
88 int irq_base)
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +010089{
90 int i;
91 int ret = 0;
92
93 for (i = 0; i < n_devs; i++) {
Dmitry Baryshkov424f5252008-07-29 01:30:26 +020094 ret = mfd_add_device(parent, id, cells + i, mem_base, irq_base);
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +010095 if (ret)
96 break;
97 }
98
99 if (ret)
100 mfd_remove_devices(parent);
101
102 return ret;
103}
104EXPORT_SYMBOL(mfd_add_devices);
105
106static int mfd_remove_devices_fn(struct device *dev, void *unused)
107{
Ben Dooks96ee4192008-07-28 18:26:42 +0200108 platform_device_unregister(to_platform_device(dev));
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +0100109 return 0;
110}
111
Dmitry Baryshkov424f5252008-07-29 01:30:26 +0200112void mfd_remove_devices(struct device *parent)
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +0100113{
Dmitry Baryshkov424f5252008-07-29 01:30:26 +0200114 device_for_each_child(parent, NULL, mfd_remove_devices_fn);
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +0100115}
116EXPORT_SYMBOL(mfd_remove_devices);
117
118MODULE_LICENSE("GPL");
119MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov");