2 * drivers/mfd/mfd-core.c
5 * Copyright (c) 2006 Ian Molton
6 * Copyright (c) 2007,2008 Dmitry Baryshkov
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.
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>
20 static int mfd_add_device(struct device *parent, int id,
21 const struct mfd_cell *cell,
22 struct resource *mem_base,
26 struct platform_device *pdev;
30 pdev = platform_device_alloc(cell->name, id + cell->id);
34 res = kzalloc(sizeof(*res) * cell->num_resources, GFP_KERNEL);
38 pdev->dev.parent = parent;
39 platform_set_drvdata(pdev, cell->driver_data);
41 ret = platform_device_add_data(pdev,
42 cell->platform_data, cell->data_size);
46 for (r = 0; r < cell->num_resources; r++) {
47 res[r].name = cell->resources[r].name;
48 res[r].flags = cell->resources[r].flags;
50 /* Find out base to use */
51 if ((cell->resources[r].flags & IORESOURCE_MEM) && mem_base) {
52 res[r].parent = mem_base;
53 res[r].start = mem_base->start +
54 cell->resources[r].start;
55 res[r].end = mem_base->start +
56 cell->resources[r].end;
57 } else if (cell->resources[r].flags & IORESOURCE_IRQ) {
58 res[r].start = irq_base +
59 cell->resources[r].start;
60 res[r].end = irq_base +
61 cell->resources[r].end;
63 res[r].parent = cell->resources[r].parent;
64 res[r].start = cell->resources[r].start;
65 res[r].end = cell->resources[r].end;
68 if (!cell->ignore_resource_conflicts) {
69 ret = acpi_check_resource_conflict(res);
75 ret = platform_device_add_resources(pdev, res, cell->num_resources);
79 ret = platform_device_add(pdev);
87 /* platform_device_del(pdev); */
91 platform_device_put(pdev);
96 int mfd_add_devices(struct device *parent, int id,
97 const struct mfd_cell *cells, int n_devs,
98 struct resource *mem_base,
104 for (i = 0; i < n_devs; i++) {
105 ret = mfd_add_device(parent, id, cells + i, mem_base, irq_base);
111 mfd_remove_devices(parent);
115 EXPORT_SYMBOL(mfd_add_devices);
117 static int mfd_remove_devices_fn(struct device *dev, void *unused)
119 platform_device_unregister(to_platform_device(dev));
123 void mfd_remove_devices(struct device *parent)
125 device_for_each_child(parent, NULL, mfd_remove_devices_fn);
127 EXPORT_SYMBOL(mfd_remove_devices);
129 MODULE_LICENSE("GPL");
130 MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov");