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 ret
= acpi_check_resource_conflict(res
);
73 platform_device_add_resources(pdev
, res
, cell
->num_resources
);
75 ret
= platform_device_add(pdev
);
83 /* platform_device_del(pdev); */
87 platform_device_put(pdev
);
92 int mfd_add_devices(struct device
*parent
, int id
,
93 const struct mfd_cell
*cells
, int n_devs
,
94 struct resource
*mem_base
,
100 for (i
= 0; i
< n_devs
; i
++) {
101 ret
= mfd_add_device(parent
, id
, cells
+ i
, mem_base
, irq_base
);
107 mfd_remove_devices(parent
);
111 EXPORT_SYMBOL(mfd_add_devices
);
113 static int mfd_remove_devices_fn(struct device
*dev
, void *unused
)
115 platform_device_unregister(to_platform_device(dev
));
119 void mfd_remove_devices(struct device
*parent
)
121 device_for_each_child(parent
, NULL
, mfd_remove_devices_fn
);
123 EXPORT_SYMBOL(mfd_remove_devices
);
125 MODULE_LICENSE("GPL");
126 MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov");