2 * platform_device.h - generic, centralized driver model
6 * This file is released under the GPLv2
8 * See Documentation/driver-model/ for more information.
11 #ifndef _PLATFORM_DEVICE_H_
12 #define _PLATFORM_DEVICE_H_
14 #include <linux/device.h>
15 #include <linux/mod_devicetable.h>
17 #define PLATFORM_DEVID_NONE (-1)
18 #define PLATFORM_DEVID_AUTO (-2)
22 struct platform_device {
28 struct resource * resource;
30 const struct platform_device_id *id_entry;
32 /* MFD cell pointer */
33 struct mfd_cell *mfd_cell;
35 /* arch specific additions */
36 struct pdev_archdata archdata;
39 #define platform_get_device_id(pdev) ((pdev)->id_entry)
41 #define to_platform_device(x) container_of((x), struct platform_device, dev)
43 extern int platform_device_register(struct platform_device *);
44 extern void platform_device_unregister(struct platform_device *);
46 extern struct bus_type platform_bus_type;
47 extern struct device platform_bus;
49 extern void arch_setup_pdev_archdata(struct platform_device *);
50 extern struct resource *platform_get_resource(struct platform_device *, unsigned int, unsigned int);
51 extern int platform_get_irq(struct platform_device *, unsigned int);
52 extern struct resource *platform_get_resource_byname(struct platform_device *, unsigned int, const char *);
53 extern int platform_get_irq_byname(struct platform_device *, const char *);
54 extern int platform_add_devices(struct platform_device **, int);
56 struct platform_device_info {
57 struct device *parent;
58 struct acpi_dev_node acpi_node;
63 const struct resource *res;
70 extern struct platform_device *platform_device_register_full(
71 const struct platform_device_info *pdevinfo);
74 * platform_device_register_resndata - add a platform-level device with
75 * resources and platform-specific data
77 * @parent: parent device for the device we're adding
78 * @name: base name of the device we're adding
80 * @res: set of resources that needs to be allocated for the device
81 * @num: number of resources
82 * @data: platform specific data for this platform device
83 * @size: size of platform specific data
85 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
87 static inline struct platform_device *platform_device_register_resndata(
88 struct device *parent, const char *name, int id,
89 const struct resource *res, unsigned int num,
90 const void *data, size_t size) {
92 struct platform_device_info pdevinfo = {
103 return platform_device_register_full(&pdevinfo);
107 * platform_device_register_simple - add a platform-level device and its resources
108 * @name: base name of the device we're adding
110 * @res: set of resources that needs to be allocated for the device
111 * @num: number of resources
113 * This function creates a simple platform device that requires minimal
114 * resource and memory management. Canned release function freeing memory
115 * allocated for the device allows drivers using such devices to be
116 * unloaded without waiting for the last reference to the device to be
119 * This interface is primarily intended for use with legacy drivers which
120 * probe hardware directly. Because such drivers create sysfs device nodes
121 * themselves, rather than letting system infrastructure handle such device
122 * enumeration tasks, they don't fully conform to the Linux driver model.
123 * In particular, when such drivers are built as modules, they can't be
126 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
128 static inline struct platform_device *platform_device_register_simple(
129 const char *name, int id,
130 const struct resource *res, unsigned int num)
132 return platform_device_register_resndata(NULL, name, id,
137 * platform_device_register_data - add a platform-level device with platform-specific data
138 * @parent: parent device for the device we're adding
139 * @name: base name of the device we're adding
141 * @data: platform specific data for this platform device
142 * @size: size of platform specific data
144 * This function creates a simple platform device that requires minimal
145 * resource and memory management. Canned release function freeing memory
146 * allocated for the device allows drivers using such devices to be
147 * unloaded without waiting for the last reference to the device to be
150 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
152 static inline struct platform_device *platform_device_register_data(
153 struct device *parent, const char *name, int id,
154 const void *data, size_t size)
156 return platform_device_register_resndata(parent, name, id,
157 NULL, 0, data, size);
160 extern struct platform_device *platform_device_alloc(const char *name, int id);
161 extern int platform_device_add_resources(struct platform_device *pdev,
162 const struct resource *res,
164 extern int platform_device_add_data(struct platform_device *pdev, const void *data, size_t size);
165 extern int platform_device_add(struct platform_device *pdev);
166 extern void platform_device_del(struct platform_device *pdev);
167 extern void platform_device_put(struct platform_device *pdev);
169 struct platform_driver {
170 int (*probe)(struct platform_device *);
171 int (*remove)(struct platform_device *);
172 void (*shutdown)(struct platform_device *);
173 int (*suspend)(struct platform_device *, pm_message_t state);
174 int (*resume)(struct platform_device *);
175 struct device_driver driver;
176 const struct platform_device_id *id_table;
179 extern int platform_driver_register(struct platform_driver *);
180 extern void platform_driver_unregister(struct platform_driver *);
182 /* non-hotpluggable platform devices may use this so that probe() and
183 * its support may live in __init sections, conserving runtime memory.
185 extern int platform_driver_probe(struct platform_driver *driver,
186 int (*probe)(struct platform_device *));
188 static inline void *platform_get_drvdata(const struct platform_device *pdev)
190 return dev_get_drvdata(&pdev->dev);
193 static inline void platform_set_drvdata(struct platform_device *pdev, void *data)
195 dev_set_drvdata(&pdev->dev, data);
198 /* module_platform_driver() - Helper macro for drivers that don't do
199 * anything special in module init/exit. This eliminates a lot of
200 * boilerplate. Each module may only use this macro once, and
201 * calling it replaces module_init() and module_exit()
203 #define module_platform_driver(__platform_driver) \
204 module_driver(__platform_driver, platform_driver_register, \
205 platform_driver_unregister)
207 /* module_platform_driver_probe() - Helper macro for drivers that don't do
208 * anything special in module init/exit. This eliminates a lot of
209 * boilerplate. Each module may only use this macro once, and
210 * calling it replaces module_init() and module_exit()
212 #define module_platform_driver_probe(__platform_driver, __platform_probe) \
213 static int __init __platform_driver##_init(void) \
215 return platform_driver_probe(&(__platform_driver), \
218 module_init(__platform_driver##_init); \
219 static void __exit __platform_driver##_exit(void) \
221 platform_driver_unregister(&(__platform_driver)); \
223 module_exit(__platform_driver##_exit);
225 extern struct platform_device *platform_create_bundle(struct platform_driver *driver,
226 int (*probe)(struct platform_device *),
227 struct resource *res, unsigned int n_res,
228 const void *data, size_t size);
230 /* early platform driver interface */
231 struct early_platform_driver {
232 const char *class_str;
233 struct platform_driver *pdrv;
234 struct list_head list;
240 #define EARLY_PLATFORM_ID_UNSET -2
241 #define EARLY_PLATFORM_ID_ERROR -3
243 extern int early_platform_driver_register(struct early_platform_driver *epdrv,
245 extern void early_platform_add_devices(struct platform_device **devs, int num);
247 static inline int is_early_platform_device(struct platform_device *pdev)
249 return !pdev->dev.driver;
252 extern void early_platform_driver_register_all(char *class_str);
253 extern int early_platform_driver_probe(char *class_str,
254 int nr_probe, int user_only);
255 extern void early_platform_cleanup(void);
257 #define early_platform_init(class_string, platdrv) \
258 early_platform_init_buffer(class_string, platdrv, NULL, 0)
261 #define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
262 static __initdata struct early_platform_driver early_driver = { \
263 .class_str = class_string, \
267 .requested_id = EARLY_PLATFORM_ID_UNSET, \
269 static int __init early_platform_driver_setup_func(char *buffer) \
271 return early_platform_driver_register(&early_driver, buffer); \
273 early_param(class_string, early_platform_driver_setup_func)
275 #define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
276 static inline char *early_platform_driver_setup_func(void) \
278 return bufsiz ? buf : NULL; \
282 #ifdef CONFIG_SUSPEND
283 extern int platform_pm_suspend(struct device *dev);
284 extern int platform_pm_resume(struct device *dev);
286 #define platform_pm_suspend NULL
287 #define platform_pm_resume NULL
290 #ifdef CONFIG_HIBERNATE_CALLBACKS
291 extern int platform_pm_freeze(struct device *dev);
292 extern int platform_pm_thaw(struct device *dev);
293 extern int platform_pm_poweroff(struct device *dev);
294 extern int platform_pm_restore(struct device *dev);
296 #define platform_pm_freeze NULL
297 #define platform_pm_thaw NULL
298 #define platform_pm_poweroff NULL
299 #define platform_pm_restore NULL
302 #ifdef CONFIG_PM_SLEEP
303 #define USE_PLATFORM_PM_SLEEP_OPS \
304 .suspend = platform_pm_suspend, \
305 .resume = platform_pm_resume, \
306 .freeze = platform_pm_freeze, \
307 .thaw = platform_pm_thaw, \
308 .poweroff = platform_pm_poweroff, \
309 .restore = platform_pm_restore,
311 #define USE_PLATFORM_PM_SLEEP_OPS
314 #endif /* _PLATFORM_DEVICE_H_ */