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);
56 devm_platform_ioremap_resource(struct platform_device *pdev,
58 extern int platform_get_irq(struct platform_device *, unsigned int);
59 extern int platform_irq_count(struct platform_device *);
60 extern struct resource *platform_get_resource_byname(struct platform_device *,
63 extern int platform_get_irq_byname(struct platform_device *, const char *);
64 extern int platform_add_devices(struct platform_device **, int);
66 struct platform_device_info {
67 struct device *parent;
68 struct fwnode_handle *fwnode;
74 const struct resource *res;
81 struct property_entry *properties;
83 extern struct platform_device *platform_device_register_full(
84 const struct platform_device_info *pdevinfo);
87 * platform_device_register_resndata - add a platform-level device with
88 * resources and platform-specific data
90 * @parent: parent device for the device we're adding
91 * @name: base name of the device we're adding
93 * @res: set of resources that needs to be allocated for the device
94 * @num: number of resources
95 * @data: platform specific data for this platform device
96 * @size: size of platform specific data
98 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
100 static inline struct platform_device *platform_device_register_resndata(
101 struct device *parent, const char *name, int id,
102 const struct resource *res, unsigned int num,
103 const void *data, size_t size) {
105 struct platform_device_info pdevinfo = {
116 return platform_device_register_full(&pdevinfo);
120 * platform_device_register_simple - add a platform-level device and its resources
121 * @name: base name of the device we're adding
123 * @res: set of resources that needs to be allocated for the device
124 * @num: number of resources
126 * This function creates a simple platform device that requires minimal
127 * resource and memory management. Canned release function freeing memory
128 * allocated for the device allows drivers using such devices to be
129 * unloaded without waiting for the last reference to the device to be
132 * This interface is primarily intended for use with legacy drivers which
133 * probe hardware directly. Because such drivers create sysfs device nodes
134 * themselves, rather than letting system infrastructure handle such device
135 * enumeration tasks, they don't fully conform to the Linux driver model.
136 * In particular, when such drivers are built as modules, they can't be
139 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
141 static inline struct platform_device *platform_device_register_simple(
142 const char *name, int id,
143 const struct resource *res, unsigned int num)
145 return platform_device_register_resndata(NULL, name, id,
150 * platform_device_register_data - add a platform-level device with platform-specific data
151 * @parent: parent device for the device we're adding
152 * @name: base name of the device we're adding
154 * @data: platform specific data for this platform device
155 * @size: size of platform specific data
157 * This function creates a simple platform device that requires minimal
158 * resource and memory management. Canned release function freeing memory
159 * allocated for the device allows drivers using such devices to be
160 * unloaded without waiting for the last reference to the device to be
163 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
165 static inline struct platform_device *platform_device_register_data(
166 struct device *parent, const char *name, int id,
167 const void *data, size_t size)
169 return platform_device_register_resndata(parent, name, id,
170 NULL, 0, data, size);
173 extern struct platform_device *platform_device_alloc(const char *name, int id);
174 extern int platform_device_add_resources(struct platform_device *pdev,
175 const struct resource *res,
177 extern int platform_device_add_data(struct platform_device *pdev,
178 const void *data, size_t size);
179 extern int platform_device_add_properties(struct platform_device *pdev,
180 const struct property_entry *properties);
181 extern int platform_device_add(struct platform_device *pdev);
182 extern void platform_device_del(struct platform_device *pdev);
183 extern void platform_device_put(struct platform_device *pdev);
185 struct platform_driver {
186 int (*probe)(struct platform_device *);
187 int (*remove)(struct platform_device *);
188 void (*shutdown)(struct platform_device *);
189 int (*suspend)(struct platform_device *, pm_message_t state);
190 int (*resume)(struct platform_device *);
191 struct device_driver driver;
192 const struct platform_device_id *id_table;
193 bool prevent_deferred_probe;
196 #define to_platform_driver(drv) (container_of((drv), struct platform_driver, \
200 * use a macro to avoid include chaining to get THIS_MODULE
202 #define platform_driver_register(drv) \
203 __platform_driver_register(drv, THIS_MODULE)
204 extern int __platform_driver_register(struct platform_driver *,
206 extern void platform_driver_unregister(struct platform_driver *);
208 /* non-hotpluggable platform devices may use this so that probe() and
209 * its support may live in __init sections, conserving runtime memory.
211 #define platform_driver_probe(drv, probe) \
212 __platform_driver_probe(drv, probe, THIS_MODULE)
213 extern int __platform_driver_probe(struct platform_driver *driver,
214 int (*probe)(struct platform_device *), struct module *module);
216 static inline void *platform_get_drvdata(const struct platform_device *pdev)
218 return dev_get_drvdata(&pdev->dev);
221 static inline void platform_set_drvdata(struct platform_device *pdev,
224 dev_set_drvdata(&pdev->dev, data);
227 /* module_platform_driver() - Helper macro for drivers that don't do
228 * anything special in module init/exit. This eliminates a lot of
229 * boilerplate. Each module may only use this macro once, and
230 * calling it replaces module_init() and module_exit()
232 #define module_platform_driver(__platform_driver) \
233 module_driver(__platform_driver, platform_driver_register, \
234 platform_driver_unregister)
236 /* builtin_platform_driver() - Helper macro for builtin drivers that
237 * don't do anything special in driver init. This eliminates some
238 * boilerplate. Each driver may only use this macro once, and
239 * calling it replaces device_initcall(). Note this is meant to be
240 * a parallel of module_platform_driver() above, but w/o _exit stuff.
242 #define builtin_platform_driver(__platform_driver) \
243 builtin_driver(__platform_driver, platform_driver_register)
245 /* module_platform_driver_probe() - Helper macro for drivers that don't do
246 * anything special in module init/exit. This eliminates a lot of
247 * boilerplate. Each module may only use this macro once, and
248 * calling it replaces module_init() and module_exit()
250 #define module_platform_driver_probe(__platform_driver, __platform_probe) \
251 static int __init __platform_driver##_init(void) \
253 return platform_driver_probe(&(__platform_driver), \
256 module_init(__platform_driver##_init); \
257 static void __exit __platform_driver##_exit(void) \
259 platform_driver_unregister(&(__platform_driver)); \
261 module_exit(__platform_driver##_exit);
263 /* builtin_platform_driver_probe() - Helper macro for drivers that don't do
264 * anything special in device init. This eliminates some boilerplate. Each
265 * driver may only use this macro once, and using it replaces device_initcall.
266 * This is meant to be a parallel of module_platform_driver_probe above, but
267 * without the __exit parts.
269 #define builtin_platform_driver_probe(__platform_driver, __platform_probe) \
270 static int __init __platform_driver##_init(void) \
272 return platform_driver_probe(&(__platform_driver), \
275 device_initcall(__platform_driver##_init); \
277 #define platform_create_bundle(driver, probe, res, n_res, data, size) \
278 __platform_create_bundle(driver, probe, res, n_res, data, size, THIS_MODULE)
279 extern struct platform_device *__platform_create_bundle(
280 struct platform_driver *driver, int (*probe)(struct platform_device *),
281 struct resource *res, unsigned int n_res,
282 const void *data, size_t size, struct module *module);
284 int __platform_register_drivers(struct platform_driver * const *drivers,
285 unsigned int count, struct module *owner);
286 void platform_unregister_drivers(struct platform_driver * const *drivers,
289 #define platform_register_drivers(drivers, count) \
290 __platform_register_drivers(drivers, count, THIS_MODULE)
292 /* early platform driver interface */
293 struct early_platform_driver {
294 const char *class_str;
295 struct platform_driver *pdrv;
296 struct list_head list;
302 #define EARLY_PLATFORM_ID_UNSET -2
303 #define EARLY_PLATFORM_ID_ERROR -3
305 extern int early_platform_driver_register(struct early_platform_driver *epdrv,
307 extern void early_platform_add_devices(struct platform_device **devs, int num);
309 static inline int is_early_platform_device(struct platform_device *pdev)
311 return !pdev->dev.driver;
314 extern void early_platform_driver_register_all(char *class_str);
315 extern int early_platform_driver_probe(char *class_str,
316 int nr_probe, int user_only);
317 extern void early_platform_cleanup(void);
319 #define early_platform_init(class_string, platdrv) \
320 early_platform_init_buffer(class_string, platdrv, NULL, 0)
323 #define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
324 static __initdata struct early_platform_driver early_driver = { \
325 .class_str = class_string, \
329 .requested_id = EARLY_PLATFORM_ID_UNSET, \
331 static int __init early_platform_driver_setup_func(char *buffer) \
333 return early_platform_driver_register(&early_driver, buffer); \
335 early_param(class_string, early_platform_driver_setup_func)
337 #define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
338 static inline char *early_platform_driver_setup_func(void) \
340 return bufsiz ? buf : NULL; \
344 #ifdef CONFIG_SUSPEND
345 extern int platform_pm_suspend(struct device *dev);
346 extern int platform_pm_resume(struct device *dev);
348 #define platform_pm_suspend NULL
349 #define platform_pm_resume NULL
352 #ifdef CONFIG_HIBERNATE_CALLBACKS
353 extern int platform_pm_freeze(struct device *dev);
354 extern int platform_pm_thaw(struct device *dev);
355 extern int platform_pm_poweroff(struct device *dev);
356 extern int platform_pm_restore(struct device *dev);
358 #define platform_pm_freeze NULL
359 #define platform_pm_thaw NULL
360 #define platform_pm_poweroff NULL
361 #define platform_pm_restore NULL
364 extern int platform_dma_configure(struct device *dev);
366 #ifdef CONFIG_PM_SLEEP
367 #define USE_PLATFORM_PM_SLEEP_OPS \
368 .suspend = platform_pm_suspend, \
369 .resume = platform_pm_resume, \
370 .freeze = platform_pm_freeze, \
371 .thaw = platform_pm_thaw, \
372 .poweroff = platform_pm_poweroff, \
373 .restore = platform_pm_restore,
375 #define USE_PLATFORM_PM_SLEEP_OPS
378 #endif /* _PLATFORM_DEVICE_H_ */