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>
16 #define PLATFORM_DEVID_NONE (-1)
17 #define PLATFORM_DEVID_AUTO (-2)
20 struct property_entry;
21 struct platform_device_id;
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 dev_is_platform(dev) ((dev)->bus == &platform_bus_type)
44 #define to_platform_device(x) container_of((x), struct platform_device, dev)
46 extern int platform_device_register(struct platform_device *);
47 extern void platform_device_unregister(struct platform_device *);
49 extern struct bus_type platform_bus_type;
50 extern struct device platform_bus;
52 extern void arch_setup_pdev_archdata(struct platform_device *);
53 extern struct resource *platform_get_resource(struct platform_device *,
54 unsigned int, unsigned int);
55 extern int platform_get_irq(struct platform_device *, unsigned int);
56 extern int platform_irq_count(struct platform_device *);
57 extern struct resource *platform_get_resource_byname(struct platform_device *,
60 extern int platform_get_irq_byname(struct platform_device *, const char *);
61 extern int platform_add_devices(struct platform_device **, int);
63 struct platform_device_info {
64 struct device *parent;
65 struct fwnode_handle *fwnode;
70 const struct resource *res;
77 struct property_entry *properties;
79 extern struct platform_device *platform_device_register_full(
80 const struct platform_device_info *pdevinfo);
83 * platform_device_register_resndata - add a platform-level device with
84 * resources and platform-specific data
86 * @parent: parent device for the device we're adding
87 * @name: base name of the device we're adding
89 * @res: set of resources that needs to be allocated for the device
90 * @num: number of resources
91 * @data: platform specific data for this platform device
92 * @size: size of platform specific data
94 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
96 static inline struct platform_device *platform_device_register_resndata(
97 struct device *parent, const char *name, int id,
98 const struct resource *res, unsigned int num,
99 const void *data, size_t size) {
101 struct platform_device_info pdevinfo = {
112 return platform_device_register_full(&pdevinfo);
116 * platform_device_register_simple - add a platform-level device and its resources
117 * @name: base name of the device we're adding
119 * @res: set of resources that needs to be allocated for the device
120 * @num: number of resources
122 * This function creates a simple platform device that requires minimal
123 * resource and memory management. Canned release function freeing memory
124 * allocated for the device allows drivers using such devices to be
125 * unloaded without waiting for the last reference to the device to be
128 * This interface is primarily intended for use with legacy drivers which
129 * probe hardware directly. Because such drivers create sysfs device nodes
130 * themselves, rather than letting system infrastructure handle such device
131 * enumeration tasks, they don't fully conform to the Linux driver model.
132 * In particular, when such drivers are built as modules, they can't be
135 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
137 static inline struct platform_device *platform_device_register_simple(
138 const char *name, int id,
139 const struct resource *res, unsigned int num)
141 return platform_device_register_resndata(NULL, name, id,
146 * platform_device_register_data - add a platform-level device with platform-specific data
147 * @parent: parent device for the device we're adding
148 * @name: base name of the device we're adding
150 * @data: platform specific data for this platform device
151 * @size: size of platform specific data
153 * This function creates a simple platform device that requires minimal
154 * resource and memory management. Canned release function freeing memory
155 * allocated for the device allows drivers using such devices to be
156 * unloaded without waiting for the last reference to the device to be
159 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
161 static inline struct platform_device *platform_device_register_data(
162 struct device *parent, const char *name, int id,
163 const void *data, size_t size)
165 return platform_device_register_resndata(parent, name, id,
166 NULL, 0, data, size);
169 extern struct platform_device *platform_device_alloc(const char *name, int id);
170 extern int platform_device_add_resources(struct platform_device *pdev,
171 const struct resource *res,
173 extern int platform_device_add_data(struct platform_device *pdev,
174 const void *data, size_t size);
175 extern int platform_device_add_properties(struct platform_device *pdev,
176 const struct property_entry *properties);
177 extern int platform_device_add(struct platform_device *pdev);
178 extern void platform_device_del(struct platform_device *pdev);
179 extern void platform_device_put(struct platform_device *pdev);
181 struct platform_driver {
182 int (*probe)(struct platform_device *);
183 int (*remove)(struct platform_device *);
184 void (*shutdown)(struct platform_device *);
185 int (*suspend)(struct platform_device *, pm_message_t state);
186 int (*resume)(struct platform_device *);
187 struct device_driver driver;
188 const struct platform_device_id *id_table;
189 bool prevent_deferred_probe;
192 #define to_platform_driver(drv) (container_of((drv), struct platform_driver, \
196 * use a macro to avoid include chaining to get THIS_MODULE
198 #define platform_driver_register(drv) \
199 __platform_driver_register(drv, THIS_MODULE)
200 extern int __platform_driver_register(struct platform_driver *,
202 extern void platform_driver_unregister(struct platform_driver *);
204 /* non-hotpluggable platform devices may use this so that probe() and
205 * its support may live in __init sections, conserving runtime memory.
207 #define platform_driver_probe(drv, probe) \
208 __platform_driver_probe(drv, probe, THIS_MODULE)
209 extern int __platform_driver_probe(struct platform_driver *driver,
210 int (*probe)(struct platform_device *), struct module *module);
212 static inline void *platform_get_drvdata(const struct platform_device *pdev)
214 return dev_get_drvdata(&pdev->dev);
217 static inline void platform_set_drvdata(struct platform_device *pdev,
220 dev_set_drvdata(&pdev->dev, data);
223 /* module_platform_driver() - Helper macro for drivers that don't do
224 * anything special in module init/exit. This eliminates a lot of
225 * boilerplate. Each module may only use this macro once, and
226 * calling it replaces module_init() and module_exit()
228 #define module_platform_driver(__platform_driver) \
229 module_driver(__platform_driver, platform_driver_register, \
230 platform_driver_unregister)
232 /* builtin_platform_driver() - Helper macro for builtin drivers that
233 * don't do anything special in driver init. This eliminates some
234 * boilerplate. Each driver may only use this macro once, and
235 * calling it replaces device_initcall(). Note this is meant to be
236 * a parallel of module_platform_driver() above, but w/o _exit stuff.
238 #define builtin_platform_driver(__platform_driver) \
239 builtin_driver(__platform_driver, platform_driver_register)
241 /* module_platform_driver_probe() - Helper macro for drivers that don't do
242 * anything special in module init/exit. This eliminates a lot of
243 * boilerplate. Each module may only use this macro once, and
244 * calling it replaces module_init() and module_exit()
246 #define module_platform_driver_probe(__platform_driver, __platform_probe) \
247 static int __init __platform_driver##_init(void) \
249 return platform_driver_probe(&(__platform_driver), \
252 module_init(__platform_driver##_init); \
253 static void __exit __platform_driver##_exit(void) \
255 platform_driver_unregister(&(__platform_driver)); \
257 module_exit(__platform_driver##_exit);
259 /* builtin_platform_driver_probe() - Helper macro for drivers that don't do
260 * anything special in device init. This eliminates some boilerplate. Each
261 * driver may only use this macro once, and using it replaces device_initcall.
262 * This is meant to be a parallel of module_platform_driver_probe above, but
263 * without the __exit parts.
265 #define builtin_platform_driver_probe(__platform_driver, __platform_probe) \
266 static int __init __platform_driver##_init(void) \
268 return platform_driver_probe(&(__platform_driver), \
271 device_initcall(__platform_driver##_init); \
273 #define platform_create_bundle(driver, probe, res, n_res, data, size) \
274 __platform_create_bundle(driver, probe, res, n_res, data, size, THIS_MODULE)
275 extern struct platform_device *__platform_create_bundle(
276 struct platform_driver *driver, int (*probe)(struct platform_device *),
277 struct resource *res, unsigned int n_res,
278 const void *data, size_t size, struct module *module);
280 int __platform_register_drivers(struct platform_driver * const *drivers,
281 unsigned int count, struct module *owner);
282 void platform_unregister_drivers(struct platform_driver * const *drivers,
285 #define platform_register_drivers(drivers, count) \
286 __platform_register_drivers(drivers, count, THIS_MODULE)
288 /* early platform driver interface */
289 struct early_platform_driver {
290 const char *class_str;
291 struct platform_driver *pdrv;
292 struct list_head list;
298 #define EARLY_PLATFORM_ID_UNSET -2
299 #define EARLY_PLATFORM_ID_ERROR -3
301 extern int early_platform_driver_register(struct early_platform_driver *epdrv,
303 extern void early_platform_add_devices(struct platform_device **devs, int num);
305 static inline int is_early_platform_device(struct platform_device *pdev)
307 return !pdev->dev.driver;
310 extern void early_platform_driver_register_all(char *class_str);
311 extern int early_platform_driver_probe(char *class_str,
312 int nr_probe, int user_only);
313 extern void early_platform_cleanup(void);
315 #define early_platform_init(class_string, platdrv) \
316 early_platform_init_buffer(class_string, platdrv, NULL, 0)
319 #define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
320 static __initdata struct early_platform_driver early_driver = { \
321 .class_str = class_string, \
325 .requested_id = EARLY_PLATFORM_ID_UNSET, \
327 static int __init early_platform_driver_setup_func(char *buffer) \
329 return early_platform_driver_register(&early_driver, buffer); \
331 early_param(class_string, early_platform_driver_setup_func)
333 #define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
334 static inline char *early_platform_driver_setup_func(void) \
336 return bufsiz ? buf : NULL; \
340 #ifdef CONFIG_SUSPEND
341 extern int platform_pm_suspend(struct device *dev);
342 extern int platform_pm_resume(struct device *dev);
344 #define platform_pm_suspend NULL
345 #define platform_pm_resume NULL
348 #ifdef CONFIG_HIBERNATE_CALLBACKS
349 extern int platform_pm_freeze(struct device *dev);
350 extern int platform_pm_thaw(struct device *dev);
351 extern int platform_pm_poweroff(struct device *dev);
352 extern int platform_pm_restore(struct device *dev);
354 #define platform_pm_freeze NULL
355 #define platform_pm_thaw NULL
356 #define platform_pm_poweroff NULL
357 #define platform_pm_restore NULL
360 extern int platform_dma_configure(struct device *dev);
362 #ifdef CONFIG_PM_SLEEP
363 #define USE_PLATFORM_PM_SLEEP_OPS \
364 .suspend = platform_pm_suspend, \
365 .resume = platform_pm_resume, \
366 .freeze = platform_pm_freeze, \
367 .thaw = platform_pm_thaw, \
368 .poweroff = platform_pm_poweroff, \
369 .restore = platform_pm_restore,
371 #define USE_PLATFORM_PM_SLEEP_OPS
374 #endif /* _PLATFORM_DEVICE_H_ */