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3f23de10 SR |
1 | /* |
2 | * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp. | |
3 | * <benh@kernel.crashing.org> | |
4 | * and Arnd Bergmann, IBM Corp. | |
5 | * Merged from powerpc/kernel/of_platform.c and | |
6 | * sparc{,64}/kernel/of_device.c by Stephen Rothwell | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | * | |
13 | */ | |
14 | #include <linux/errno.h> | |
15 | #include <linux/device.h> | |
16 | #include <linux/of_device.h> | |
17 | #include <linux/of_platform.h> | |
18 | ||
19 | static int of_platform_bus_match(struct device *dev, struct device_driver *drv) | |
20 | { | |
21 | struct of_device *of_dev = to_of_device(dev); | |
22 | struct of_platform_driver *of_drv = to_of_platform_driver(drv); | |
23 | const struct of_device_id *matches = of_drv->match_table; | |
24 | ||
25 | if (!matches) | |
26 | return 0; | |
27 | ||
28 | return of_match_device(matches, of_dev) != NULL; | |
29 | } | |
30 | ||
31 | static int of_platform_device_probe(struct device *dev) | |
32 | { | |
33 | int error = -ENODEV; | |
34 | struct of_platform_driver *drv; | |
35 | struct of_device *of_dev; | |
36 | const struct of_device_id *match; | |
37 | ||
38 | drv = to_of_platform_driver(dev->driver); | |
39 | of_dev = to_of_device(dev); | |
40 | ||
41 | if (!drv->probe) | |
42 | return error; | |
43 | ||
44 | of_dev_get(of_dev); | |
45 | ||
46 | match = of_match_device(drv->match_table, of_dev); | |
47 | if (match) | |
48 | error = drv->probe(of_dev, match); | |
49 | if (error) | |
50 | of_dev_put(of_dev); | |
51 | ||
52 | return error; | |
53 | } | |
54 | ||
55 | static int of_platform_device_remove(struct device *dev) | |
56 | { | |
57 | struct of_device *of_dev = to_of_device(dev); | |
58 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
59 | ||
60 | if (dev->driver && drv->remove) | |
61 | drv->remove(of_dev); | |
62 | return 0; | |
63 | } | |
64 | ||
65 | static int of_platform_device_suspend(struct device *dev, pm_message_t state) | |
66 | { | |
67 | struct of_device *of_dev = to_of_device(dev); | |
68 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
69 | int error = 0; | |
70 | ||
71 | if (dev->driver && drv->suspend) | |
72 | error = drv->suspend(of_dev, state); | |
73 | return error; | |
74 | } | |
75 | ||
76 | static int of_platform_device_resume(struct device * dev) | |
77 | { | |
78 | struct of_device *of_dev = to_of_device(dev); | |
79 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
80 | int error = 0; | |
81 | ||
82 | if (dev->driver && drv->resume) | |
83 | error = drv->resume(of_dev); | |
84 | return error; | |
85 | } | |
86 | ||
87 | int of_bus_type_init(struct bus_type *bus, const char *name) | |
88 | { | |
89 | bus->name = name; | |
90 | bus->match = of_platform_bus_match; | |
91 | bus->probe = of_platform_device_probe; | |
92 | bus->remove = of_platform_device_remove; | |
93 | bus->suspend = of_platform_device_suspend; | |
94 | bus->resume = of_platform_device_resume; | |
95 | return bus_register(bus); | |
96 | } |