2 * platform_device.h - generic, centralized driver model
4 * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
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)
23 struct platform_device {
29 struct resource *resource;
31 const struct platform_device_id *id_entry;
32 char *driver_override; /* Driver name to force a match */
34 /* MFD cell pointer */
35 struct mfd_cell *mfd_cell;
37 /* arch specific additions */
38 struct pdev_archdata archdata;
41 #define platform_get_device_id(pdev) ((pdev)->id_entry)
43 #define to_platform_device(x) container_of((x), struct platform_device, dev)
45 extern int platform_device_register(struct platform_device *);
46 extern void platform_device_unregister(struct platform_device *);
48 extern struct bus_type platform_bus_type;
49 extern struct device platform_bus;
51 extern void arch_setup_pdev_archdata(struct platform_device *);
52 extern struct resource *platform_get_resource(struct platform_device *,
53 unsigned int, unsigned int);
54 extern int platform_get_irq(struct platform_device *, unsigned int);
55 extern struct resource *platform_get_resource_byname(struct platform_device *,
58 extern int platform_get_irq_byname(struct platform_device *, const char *);
59 extern int platform_add_devices(struct platform_device **, int);
61 struct platform_device_info {
62 struct device *parent;
63 struct fwnode_handle *fwnode;
68 const struct resource *res;
75 const struct property_set *pset;
77 extern struct platform_device *platform_device_register_full(
78 const struct platform_device_info *pdevinfo);
81 * platform_device_register_resndata - add a platform-level device with
82 * resources and platform-specific data
84 * @parent: parent device for the device we're adding
85 * @name: base name of the device we're adding
87 * @res: set of resources that needs to be allocated for the device
88 * @num: number of resources
89 * @data: platform specific data for this platform device
90 * @size: size of platform specific data
92 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
94 static inline struct platform_device *platform_device_register_resndata(
95 struct device *parent, const char *name, int id,
96 const struct resource *res, unsigned int num,
97 const void *data, size_t size) {
99 struct platform_device_info pdevinfo = {
110 return platform_device_register_full(&pdevinfo);
114 * platform_device_register_simple - add a platform-level device and its resources
115 * @name: base name of the device we're adding
117 * @res: set of resources that needs to be allocated for the device
118 * @num: number of resources
120 * This function creates a simple platform device that requires minimal
121 * resource and memory management. Canned release function freeing memory
122 * allocated for the device allows drivers using such devices to be
123 * unloaded without waiting for the last reference to the device to be
126 * This interface is primarily intended for use with legacy drivers which
127 * probe hardware directly. Because such drivers create sysfs device nodes
128 * themselves, rather than letting system infrastructure handle such device
129 * enumeration tasks, they don't fully conform to the Linux driver model.
130 * In particular, when such drivers are built as modules, they can't be
133 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
135 static inline struct platform_device *platform_device_register_simple(
136 const char *name, int id,
137 const struct resource *res, unsigned int num)
139 return platform_device_register_resndata(NULL, name, id,
144 * platform_device_register_data - add a platform-level device with platform-specific data
145 * @parent: parent device for the device we're adding
146 * @name: base name of the device we're adding
148 * @data: platform specific data for this platform device
149 * @size: size of platform specific data
151 * This function creates a simple platform device that requires minimal
152 * resource and memory management. Canned release function freeing memory
153 * allocated for the device allows drivers using such devices to be
154 * unloaded without waiting for the last reference to the device to be
157 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
159 static inline struct platform_device *platform_device_register_data(
160 struct device *parent, const char *name, int id,
161 const void *data, size_t size)
163 return platform_device_register_resndata(parent, name, id,
164 NULL, 0, data, size);
167 extern struct platform_device *platform_device_alloc(const char *name, int id);
168 extern int platform_device_add_resources(struct platform_device *pdev,
169 const struct resource *res,
171 extern int platform_device_add_data(struct platform_device *pdev,
172 const void *data, size_t size);
173 extern int platform_device_add_properties(struct platform_device *pdev,
174 const struct property_set *pset);
175 extern int platform_device_add(struct platform_device *pdev);
176 extern void platform_device_del(struct platform_device *pdev);
177 extern void platform_device_put(struct platform_device *pdev);
179 struct platform_driver {
180 int (*probe)(struct platform_device *);
181 int (*remove)(struct platform_device *);
182 void (*shutdown)(struct platform_device *);
183 int (*suspend)(struct platform_device *, pm_message_t state);
184 int (*resume)(struct platform_device *);
185 struct device_driver driver;
186 const struct platform_device_id *id_table;
187 bool prevent_deferred_probe;
190 #define to_platform_driver(drv) (container_of((drv), struct platform_driver, \
194 * use a macro to avoid include chaining to get THIS_MODULE
196 #define platform_driver_register(drv) \
197 __platform_driver_register(drv, THIS_MODULE)
198 extern int __platform_driver_register(struct platform_driver *,
200 extern void platform_driver_unregister(struct platform_driver *);
202 /* non-hotpluggable platform devices may use this so that probe() and
203 * its support may live in __init sections, conserving runtime memory.
205 #define platform_driver_probe(drv, probe) \
206 __platform_driver_probe(drv, probe, THIS_MODULE)
207 extern int __platform_driver_probe(struct platform_driver *driver,
208 int (*probe)(struct platform_device *), struct module *module);
210 static inline void *platform_get_drvdata(const struct platform_device *pdev)
212 return dev_get_drvdata(&pdev->dev);
215 static inline void platform_set_drvdata(struct platform_device *pdev,
218 dev_set_drvdata(&pdev->dev, data);
221 /* module_platform_driver() - Helper macro for drivers that don't do
222 * anything special in module init/exit. This eliminates a lot of
223 * boilerplate. Each module may only use this macro once, and
224 * calling it replaces module_init() and module_exit()
226 #define module_platform_driver(__platform_driver) \
227 module_driver(__platform_driver, platform_driver_register, \
228 platform_driver_unregister)
230 /* builtin_platform_driver() - Helper macro for builtin drivers that
231 * don't do anything special in driver init. This eliminates some
232 * boilerplate. Each driver may only use this macro once, and
233 * calling it replaces device_initcall(). Note this is meant to be
234 * a parallel of module_platform_driver() above, but w/o _exit stuff.
236 #define builtin_platform_driver(__platform_driver) \
237 builtin_driver(__platform_driver, platform_driver_register)
239 /* module_platform_driver_probe() - Helper macro for drivers that don't do
240 * anything special in module init/exit. This eliminates a lot of
241 * boilerplate. Each module may only use this macro once, and
242 * calling it replaces module_init() and module_exit()
244 #define module_platform_driver_probe(__platform_driver, __platform_probe) \
245 static int __init __platform_driver##_init(void) \
247 return platform_driver_probe(&(__platform_driver), \
250 module_init(__platform_driver##_init); \
251 static void __exit __platform_driver##_exit(void) \
253 platform_driver_unregister(&(__platform_driver)); \
255 module_exit(__platform_driver##_exit);
257 /* builtin_platform_driver_probe() - Helper macro for drivers that don't do
258 * anything special in device init. This eliminates some boilerplate. Each
259 * driver may only use this macro once, and using it replaces device_initcall.
260 * This is meant to be a parallel of module_platform_driver_probe above, but
261 * without the __exit parts.
263 #define builtin_platform_driver_probe(__platform_driver, __platform_probe) \
264 static int __init __platform_driver##_init(void) \
266 return platform_driver_probe(&(__platform_driver), \
269 device_initcall(__platform_driver##_init); \
271 #define platform_create_bundle(driver, probe, res, n_res, data, size) \
272 __platform_create_bundle(driver, probe, res, n_res, data, size, THIS_MODULE)
273 extern struct platform_device *__platform_create_bundle(
274 struct platform_driver *driver, int (*probe)(struct platform_device *),
275 struct resource *res, unsigned int n_res,
276 const void *data, size_t size, struct module *module);
278 int __platform_register_drivers(struct platform_driver * const *drivers,
279 unsigned int count, struct module *owner);
280 void platform_unregister_drivers(struct platform_driver * const *drivers,
283 #define platform_register_drivers(drivers, count) \
284 __platform_register_drivers(drivers, count, THIS_MODULE)
286 /* early platform driver interface */
287 struct early_platform_driver {
288 const char *class_str;
289 struct platform_driver *pdrv;
290 struct list_head list;
296 #define EARLY_PLATFORM_ID_UNSET -2
297 #define EARLY_PLATFORM_ID_ERROR -3
299 extern int early_platform_driver_register(struct early_platform_driver *epdrv,
301 extern void early_platform_add_devices(struct platform_device **devs, int num);
303 static inline int is_early_platform_device(struct platform_device *pdev)
305 return !pdev->dev.driver;
308 extern void early_platform_driver_register_all(char *class_str);
309 extern int early_platform_driver_probe(char *class_str,
310 int nr_probe, int user_only);
311 extern void early_platform_cleanup(void);
313 #define early_platform_init(class_string, platdrv) \
314 early_platform_init_buffer(class_string, platdrv, NULL, 0)
317 #define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
318 static __initdata struct early_platform_driver early_driver = { \
319 .class_str = class_string, \
323 .requested_id = EARLY_PLATFORM_ID_UNSET, \
325 static int __init early_platform_driver_setup_func(char *buffer) \
327 return early_platform_driver_register(&early_driver, buffer); \
329 early_param(class_string, early_platform_driver_setup_func)
331 #define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
332 static inline char *early_platform_driver_setup_func(void) \
334 return bufsiz ? buf : NULL; \
338 #ifdef CONFIG_SUSPEND
339 extern int platform_pm_suspend(struct device *dev);
340 extern int platform_pm_resume(struct device *dev);
342 #define platform_pm_suspend NULL
343 #define platform_pm_resume NULL
346 #ifdef CONFIG_HIBERNATE_CALLBACKS
347 extern int platform_pm_freeze(struct device *dev);
348 extern int platform_pm_thaw(struct device *dev);
349 extern int platform_pm_poweroff(struct device *dev);
350 extern int platform_pm_restore(struct device *dev);
352 #define platform_pm_freeze NULL
353 #define platform_pm_thaw NULL
354 #define platform_pm_poweroff NULL
355 #define platform_pm_restore NULL
358 #ifdef CONFIG_PM_SLEEP
359 #define USE_PLATFORM_PM_SLEEP_OPS \
360 .suspend = platform_pm_suspend, \
361 .resume = platform_pm_resume, \
362 .freeze = platform_pm_freeze, \
363 .thaw = platform_pm_thaw, \
364 .poweroff = platform_pm_poweroff, \
365 .restore = platform_pm_restore,
367 #define USE_PLATFORM_PM_SLEEP_OPS
370 #endif /* _PLATFORM_DEVICE_H_ */