blob: ae15e495e20ea86591b7a5bf03d261ecd504d6d7 [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
Mark Brown3bed6e42009-07-27 14:45:51 +010028 pdev = platform_device_alloc(cell->name, id + cell->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;
Mark Brown44faac32008-12-18 10:54:12 +010037 platform_set_drvdata(pdev, cell->driver_data);
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +010038
39 ret = platform_device_add_data(pdev,
Mike Rapoport56edb582008-07-29 01:23:32 +020040 cell->platform_data, cell->data_size);
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +010041 if (ret)
Ian Moltona87903f2008-07-25 22:59:29 +010042 goto fail_res;
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +010043
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +010044 for (r = 0; r < cell->num_resources; r++) {
45 res[r].name = cell->resources[r].name;
46 res[r].flags = cell->resources[r].flags;
47
48 /* Find out base to use */
49 if (cell->resources[r].flags & IORESOURCE_MEM) {
50 res[r].parent = mem_base;
51 res[r].start = mem_base->start +
52 cell->resources[r].start;
53 res[r].end = mem_base->start +
54 cell->resources[r].end;
55 } else if (cell->resources[r].flags & IORESOURCE_IRQ) {
56 res[r].start = irq_base +
57 cell->resources[r].start;
58 res[r].end = irq_base +
59 cell->resources[r].end;
60 } else {
61 res[r].parent = cell->resources[r].parent;
62 res[r].start = cell->resources[r].start;
63 res[r].end = cell->resources[r].end;
64 }
65 }
66
67 platform_device_add_resources(pdev, res, cell->num_resources);
68
69 ret = platform_device_add(pdev);
70 if (ret)
Ian Moltona87903f2008-07-25 22:59:29 +010071 goto fail_res;
72
73 kfree(res);
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +010074
75 return 0;
76
77/* platform_device_del(pdev); */
Ian Moltona87903f2008-07-25 22:59:29 +010078fail_res:
79 kfree(res);
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +010080fail_device:
81 platform_device_put(pdev);
82fail_alloc:
83 return ret;
84}
85
Dmitry Baryshkov424f5252008-07-29 01:30:26 +020086int mfd_add_devices(struct device *parent, int id,
Ben Dooks7f71ac92008-07-28 18:29:09 +020087 const struct mfd_cell *cells, int n_devs,
88 struct resource *mem_base,
89 int irq_base)
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +010090{
91 int i;
92 int ret = 0;
93
94 for (i = 0; i < n_devs; i++) {
Dmitry Baryshkov424f5252008-07-29 01:30:26 +020095 ret = mfd_add_device(parent, id, cells + i, mem_base, irq_base);
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +010096 if (ret)
97 break;
98 }
99
100 if (ret)
101 mfd_remove_devices(parent);
102
103 return ret;
104}
105EXPORT_SYMBOL(mfd_add_devices);
106
107static int mfd_remove_devices_fn(struct device *dev, void *unused)
108{
Ben Dooks96ee4192008-07-28 18:26:42 +0200109 platform_device_unregister(to_platform_device(dev));
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +0100110 return 0;
111}
112
Dmitry Baryshkov424f5252008-07-29 01:30:26 +0200113void mfd_remove_devices(struct device *parent)
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +0100114{
Dmitry Baryshkov424f5252008-07-29 01:30:26 +0200115 device_for_each_child(parent, NULL, mfd_remove_devices_fn);
Dmitry Baryshkovaa613de2008-06-27 10:37:19 +0100116}
117EXPORT_SYMBOL(mfd_remove_devices);
118
119MODULE_LICENSE("GPL");
120MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov");