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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> | |
5c457083 | 15 | #include <linux/module.h> |
3f23de10 SR |
16 | #include <linux/device.h> |
17 | #include <linux/of_device.h> | |
18 | #include <linux/of_platform.h> | |
19 | ||
20 | static int of_platform_bus_match(struct device *dev, struct device_driver *drv) | |
21 | { | |
22 | struct of_device *of_dev = to_of_device(dev); | |
23 | struct of_platform_driver *of_drv = to_of_platform_driver(drv); | |
24 | const struct of_device_id *matches = of_drv->match_table; | |
25 | ||
26 | if (!matches) | |
27 | return 0; | |
28 | ||
29 | return of_match_device(matches, of_dev) != NULL; | |
30 | } | |
31 | ||
32 | static int of_platform_device_probe(struct device *dev) | |
33 | { | |
34 | int error = -ENODEV; | |
35 | struct of_platform_driver *drv; | |
36 | struct of_device *of_dev; | |
37 | const struct of_device_id *match; | |
38 | ||
39 | drv = to_of_platform_driver(dev->driver); | |
40 | of_dev = to_of_device(dev); | |
41 | ||
42 | if (!drv->probe) | |
43 | return error; | |
44 | ||
45 | of_dev_get(of_dev); | |
46 | ||
47 | match = of_match_device(drv->match_table, of_dev); | |
48 | if (match) | |
49 | error = drv->probe(of_dev, match); | |
50 | if (error) | |
51 | of_dev_put(of_dev); | |
52 | ||
53 | return error; | |
54 | } | |
55 | ||
56 | static int of_platform_device_remove(struct device *dev) | |
57 | { | |
58 | struct of_device *of_dev = to_of_device(dev); | |
59 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
60 | ||
61 | if (dev->driver && drv->remove) | |
62 | drv->remove(of_dev); | |
63 | return 0; | |
64 | } | |
65 | ||
66 | static int of_platform_device_suspend(struct device *dev, pm_message_t state) | |
67 | { | |
68 | struct of_device *of_dev = to_of_device(dev); | |
69 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
70 | int error = 0; | |
71 | ||
72 | if (dev->driver && drv->suspend) | |
73 | error = drv->suspend(of_dev, state); | |
74 | return error; | |
75 | } | |
76 | ||
77 | static int of_platform_device_resume(struct device * dev) | |
78 | { | |
79 | struct of_device *of_dev = to_of_device(dev); | |
80 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
81 | int error = 0; | |
82 | ||
83 | if (dev->driver && drv->resume) | |
84 | error = drv->resume(of_dev); | |
85 | return error; | |
86 | } | |
87 | ||
88 | int of_bus_type_init(struct bus_type *bus, const char *name) | |
89 | { | |
90 | bus->name = name; | |
91 | bus->match = of_platform_bus_match; | |
92 | bus->probe = of_platform_device_probe; | |
93 | bus->remove = of_platform_device_remove; | |
94 | bus->suspend = of_platform_device_suspend; | |
95 | bus->resume = of_platform_device_resume; | |
96 | return bus_register(bus); | |
97 | } | |
5c457083 SR |
98 | |
99 | int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus) | |
100 | { | |
101 | /* initialize common driver fields */ | |
102 | if (!drv->driver.name) | |
103 | drv->driver.name = drv->name; | |
104 | if (!drv->driver.owner) | |
105 | drv->driver.owner = drv->owner; | |
106 | drv->driver.bus = bus; | |
107 | ||
108 | /* register with core */ | |
109 | return driver_register(&drv->driver); | |
110 | } | |
111 | EXPORT_SYMBOL(of_register_driver); | |
112 | ||
113 | void of_unregister_driver(struct of_platform_driver *drv) | |
114 | { | |
115 | driver_unregister(&drv->driver); | |
116 | } | |
117 | EXPORT_SYMBOL(of_unregister_driver); |