2 * device.h - generic, centralized driver model
4 * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
5 * Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de>
6 * Copyright (c) 2008-2009 Novell Inc.
8 * This file is released under the GPLv2
10 * See Documentation/driver-model/ for more information.
16 #include <linux/ioport.h>
17 #include <linux/kobject.h>
18 #include <linux/klist.h>
19 #include <linux/list.h>
20 #include <linux/lockdep.h>
21 #include <linux/compiler.h>
22 #include <linux/types.h>
23 #include <linux/mutex.h>
24 #include <linux/pinctrl/devinfo.h>
26 #include <linux/atomic.h>
27 #include <linux/ratelimit.h>
28 #include <linux/uidgid.h>
29 #include <linux/gfp.h>
30 #include <asm/device.h>
33 struct device_private
;
35 struct driver_private
;
38 struct subsys_private
;
46 struct bus_attribute
{
47 struct attribute attr
;
48 ssize_t (*show
)(struct bus_type
*bus
, char *buf
);
49 ssize_t (*store
)(struct bus_type
*bus
, const char *buf
, size_t count
);
52 #define BUS_ATTR(_name, _mode, _show, _store) \
53 struct bus_attribute bus_attr_##_name = __ATTR(_name, _mode, _show, _store)
54 #define BUS_ATTR_RW(_name) \
55 struct bus_attribute bus_attr_##_name = __ATTR_RW(_name)
56 #define BUS_ATTR_RO(_name) \
57 struct bus_attribute bus_attr_##_name = __ATTR_RO(_name)
59 extern int __must_check
bus_create_file(struct bus_type
*,
60 struct bus_attribute
*);
61 extern void bus_remove_file(struct bus_type
*, struct bus_attribute
*);
64 * struct bus_type - The bus type of the device
66 * @name: The name of the bus.
67 * @dev_name: Used for subsystems to enumerate devices like ("foo%u", dev->id).
68 * @dev_root: Default device to use as the parent.
69 * @dev_attrs: Default attributes of the devices on the bus.
70 * @bus_groups: Default attributes of the bus.
71 * @dev_groups: Default attributes of the devices on the bus.
72 * @drv_groups: Default attributes of the device drivers on the bus.
73 * @match: Called, perhaps multiple times, whenever a new device or driver
74 * is added for this bus. It should return a positive value if the
75 * given device can be handled by the given driver and zero
76 * otherwise. It may also return error code if determining that
77 * the driver supports the device is not possible. In case of
78 * -EPROBE_DEFER it will queue the device for deferred probing.
79 * @uevent: Called when a device is added, removed, or a few other things
80 * that generate uevents to add the environment variables.
81 * @probe: Called when a new device or driver add to this bus, and callback
82 * the specific driver's probe to initial the matched device.
83 * @remove: Called when a device removed from this bus.
84 * @shutdown: Called at shut-down time to quiesce the device.
86 * @online: Called to put the device back online (after offlining it).
87 * @offline: Called to put the device offline for hot-removal. May fail.
89 * @suspend: Called when a device on this bus wants to go to sleep mode.
90 * @resume: Called to bring a device on this bus out of sleep mode.
91 * @pm: Power management operations of this bus, callback the specific
92 * device driver's pm-ops.
93 * @iommu_ops: IOMMU specific operations for this bus, used to attach IOMMU
94 * driver implementations to a bus and allow the driver to do
96 * @p: The private data of the driver core, only the driver core can
98 * @lock_key: Lock class key for use by the lock validator
100 * A bus is a channel between the processor and one or more devices. For the
101 * purposes of the device model, all devices are connected via a bus, even if
102 * it is an internal, virtual, "platform" bus. Buses can plug into each other.
103 * A USB controller is usually a PCI device, for example. The device model
104 * represents the actual connections between buses and the devices they control.
105 * A bus is represented by the bus_type structure. It contains the name, the
106 * default attributes, the bus' methods, PM operations, and the driver core's
111 const char *dev_name
;
112 struct device
*dev_root
;
113 struct device_attribute
*dev_attrs
; /* use dev_groups instead */
114 const struct attribute_group
**bus_groups
;
115 const struct attribute_group
**dev_groups
;
116 const struct attribute_group
**drv_groups
;
118 int (*match
)(struct device
*dev
, struct device_driver
*drv
);
119 int (*uevent
)(struct device
*dev
, struct kobj_uevent_env
*env
);
120 int (*probe
)(struct device
*dev
);
121 int (*remove
)(struct device
*dev
);
122 void (*shutdown
)(struct device
*dev
);
124 int (*online
)(struct device
*dev
);
125 int (*offline
)(struct device
*dev
);
127 int (*suspend
)(struct device
*dev
, pm_message_t state
);
128 int (*resume
)(struct device
*dev
);
130 const struct dev_pm_ops
*pm
;
132 const struct iommu_ops
*iommu_ops
;
134 struct subsys_private
*p
;
135 struct lock_class_key lock_key
;
138 extern int __must_check
bus_register(struct bus_type
*bus
);
140 extern void bus_unregister(struct bus_type
*bus
);
142 extern int __must_check
bus_rescan_devices(struct bus_type
*bus
);
144 /* iterator helpers for buses */
145 struct subsys_dev_iter
{
146 struct klist_iter ki
;
147 const struct device_type
*type
;
149 void subsys_dev_iter_init(struct subsys_dev_iter
*iter
,
150 struct bus_type
*subsys
,
151 struct device
*start
,
152 const struct device_type
*type
);
153 struct device
*subsys_dev_iter_next(struct subsys_dev_iter
*iter
);
154 void subsys_dev_iter_exit(struct subsys_dev_iter
*iter
);
156 int bus_for_each_dev(struct bus_type
*bus
, struct device
*start
, void *data
,
157 int (*fn
)(struct device
*dev
, void *data
));
158 struct device
*bus_find_device(struct bus_type
*bus
, struct device
*start
,
160 int (*match
)(struct device
*dev
, void *data
));
161 struct device
*bus_find_device_by_name(struct bus_type
*bus
,
162 struct device
*start
,
164 struct device
*subsys_find_device_by_id(struct bus_type
*bus
, unsigned int id
,
165 struct device
*hint
);
166 int bus_for_each_drv(struct bus_type
*bus
, struct device_driver
*start
,
167 void *data
, int (*fn
)(struct device_driver
*, void *));
168 void bus_sort_breadthfirst(struct bus_type
*bus
,
169 int (*compare
)(const struct device
*a
,
170 const struct device
*b
));
172 * Bus notifiers: Get notified of addition/removal of devices
173 * and binding/unbinding of drivers to devices.
174 * In the long run, it should be a replacement for the platform
177 struct notifier_block
;
179 extern int bus_register_notifier(struct bus_type
*bus
,
180 struct notifier_block
*nb
);
181 extern int bus_unregister_notifier(struct bus_type
*bus
,
182 struct notifier_block
*nb
);
184 /* All 4 notifers below get called with the target struct device *
185 * as an argument. Note that those functions are likely to be called
186 * with the device lock held in the core, so be careful.
188 #define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */
189 #define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device to be removed */
190 #define BUS_NOTIFY_REMOVED_DEVICE 0x00000003 /* device removed */
191 #define BUS_NOTIFY_BIND_DRIVER 0x00000004 /* driver about to be
193 #define BUS_NOTIFY_BOUND_DRIVER 0x00000005 /* driver bound to device */
194 #define BUS_NOTIFY_UNBIND_DRIVER 0x00000006 /* driver about to be
196 #define BUS_NOTIFY_UNBOUND_DRIVER 0x00000007 /* driver is unbound
198 #define BUS_NOTIFY_DRIVER_NOT_BOUND 0x00000008 /* driver fails to be bound */
200 extern struct kset
*bus_get_kset(struct bus_type
*bus
);
201 extern struct klist
*bus_get_device_klist(struct bus_type
*bus
);
204 * enum probe_type - device driver probe type to try
205 * Device drivers may opt in for special handling of their
206 * respective probe routines. This tells the core what to
209 * @PROBE_DEFAULT_STRATEGY: Used by drivers that work equally well
210 * whether probed synchronously or asynchronously.
211 * @PROBE_PREFER_ASYNCHRONOUS: Drivers for "slow" devices which
212 * probing order is not essential for booting the system may
213 * opt into executing their probes asynchronously.
214 * @PROBE_FORCE_SYNCHRONOUS: Use this to annotate drivers that need
215 * their probe routines to run synchronously with driver and
216 * device registration (with the exception of -EPROBE_DEFER
217 * handling - re-probing always ends up being done asynchronously).
219 * Note that the end goal is to switch the kernel to use asynchronous
220 * probing by default, so annotating drivers with
221 * %PROBE_PREFER_ASYNCHRONOUS is a temporary measure that allows us
222 * to speed up boot process while we are validating the rest of the
226 PROBE_DEFAULT_STRATEGY
,
227 PROBE_PREFER_ASYNCHRONOUS
,
228 PROBE_FORCE_SYNCHRONOUS
,
232 * struct device_driver - The basic device driver structure
233 * @name: Name of the device driver.
234 * @bus: The bus which the device of this driver belongs to.
235 * @owner: The module owner.
236 * @mod_name: Used for built-in modules.
237 * @suppress_bind_attrs: Disables bind/unbind via sysfs.
238 * @probe_type: Type of the probe (synchronous or asynchronous) to use.
239 * @of_match_table: The open firmware table.
240 * @acpi_match_table: The ACPI match table.
241 * @probe: Called to query the existence of a specific device,
242 * whether this driver can work with it, and bind the driver
243 * to a specific device.
244 * @remove: Called when the device is removed from the system to
245 * unbind a device from this driver.
246 * @shutdown: Called at shut-down time to quiesce the device.
247 * @suspend: Called to put the device to sleep mode. Usually to a
249 * @resume: Called to bring a device from sleep mode.
250 * @groups: Default attributes that get created by the driver core
252 * @pm: Power management operations of the device which matched
254 * @p: Driver core's private data, no one other than the driver
255 * core can touch this.
257 * The device driver-model tracks all of the drivers known to the system.
258 * The main reason for this tracking is to enable the driver core to match
259 * up drivers with new devices. Once drivers are known objects within the
260 * system, however, a number of other things become possible. Device drivers
261 * can export information and configuration variables that are independent
262 * of any specific device.
264 struct device_driver
{
266 struct bus_type
*bus
;
268 struct module
*owner
;
269 const char *mod_name
; /* used for built-in modules */
271 bool suppress_bind_attrs
; /* disables bind/unbind via sysfs */
272 enum probe_type probe_type
;
274 const struct of_device_id
*of_match_table
;
275 const struct acpi_device_id
*acpi_match_table
;
277 int (*probe
) (struct device
*dev
);
278 int (*remove
) (struct device
*dev
);
279 void (*shutdown
) (struct device
*dev
);
280 int (*suspend
) (struct device
*dev
, pm_message_t state
);
281 int (*resume
) (struct device
*dev
);
282 const struct attribute_group
**groups
;
284 const struct dev_pm_ops
*pm
;
286 struct driver_private
*p
;
290 extern int __must_check
driver_register(struct device_driver
*drv
);
291 extern void driver_unregister(struct device_driver
*drv
);
293 extern struct device_driver
*driver_find(const char *name
,
294 struct bus_type
*bus
);
295 extern int driver_probe_done(void);
296 extern void wait_for_device_probe(void);
299 /* sysfs interface for exporting driver attributes */
301 struct driver_attribute
{
302 struct attribute attr
;
303 ssize_t (*show
)(struct device_driver
*driver
, char *buf
);
304 ssize_t (*store
)(struct device_driver
*driver
, const char *buf
,
308 #define DRIVER_ATTR(_name, _mode, _show, _store) \
309 struct driver_attribute driver_attr_##_name = __ATTR(_name, _mode, _show, _store)
310 #define DRIVER_ATTR_RW(_name) \
311 struct driver_attribute driver_attr_##_name = __ATTR_RW(_name)
312 #define DRIVER_ATTR_RO(_name) \
313 struct driver_attribute driver_attr_##_name = __ATTR_RO(_name)
314 #define DRIVER_ATTR_WO(_name) \
315 struct driver_attribute driver_attr_##_name = __ATTR_WO(_name)
317 extern int __must_check
driver_create_file(struct device_driver
*driver
,
318 const struct driver_attribute
*attr
);
319 extern void driver_remove_file(struct device_driver
*driver
,
320 const struct driver_attribute
*attr
);
322 extern int __must_check
driver_for_each_device(struct device_driver
*drv
,
323 struct device
*start
,
325 int (*fn
)(struct device
*dev
,
327 struct device
*driver_find_device(struct device_driver
*drv
,
328 struct device
*start
, void *data
,
329 int (*match
)(struct device
*dev
, void *data
));
332 * struct subsys_interface - interfaces to device functions
333 * @name: name of the device function
334 * @subsys: subsytem of the devices to attach to
335 * @node: the list of functions registered at the subsystem
336 * @add_dev: device hookup to device function handler
337 * @remove_dev: device hookup to device function handler
339 * Simple interfaces attached to a subsystem. Multiple interfaces can
340 * attach to a subsystem and its devices. Unlike drivers, they do not
341 * exclusively claim or control devices. Interfaces usually represent
342 * a specific functionality of a subsystem/class of devices.
344 struct subsys_interface
{
346 struct bus_type
*subsys
;
347 struct list_head node
;
348 int (*add_dev
)(struct device
*dev
, struct subsys_interface
*sif
);
349 void (*remove_dev
)(struct device
*dev
, struct subsys_interface
*sif
);
352 int subsys_interface_register(struct subsys_interface
*sif
);
353 void subsys_interface_unregister(struct subsys_interface
*sif
);
355 int subsys_system_register(struct bus_type
*subsys
,
356 const struct attribute_group
**groups
);
357 int subsys_virtual_register(struct bus_type
*subsys
,
358 const struct attribute_group
**groups
);
361 * struct class - device classes
362 * @name: Name of the class.
363 * @owner: The module owner.
364 * @class_attrs: Default attributes of this class.
365 * @dev_groups: Default attributes of the devices that belong to the class.
366 * @dev_kobj: The kobject that represents this class and links it into the hierarchy.
367 * @dev_uevent: Called when a device is added, removed from this class, or a
368 * few other things that generate uevents to add the environment
370 * @devnode: Callback to provide the devtmpfs.
371 * @class_release: Called to release this class.
372 * @dev_release: Called to release the device.
373 * @suspend: Used to put the device to sleep mode, usually to a low power
375 * @resume: Used to bring the device from the sleep mode.
376 * @ns_type: Callbacks so sysfs can detemine namespaces.
377 * @namespace: Namespace of the device belongs to this class.
378 * @pm: The default device power management operations of this class.
379 * @p: The private data of the driver core, no one other than the
380 * driver core can touch this.
382 * A class is a higher-level view of a device that abstracts out low-level
383 * implementation details. Drivers may see a SCSI disk or an ATA disk, but,
384 * at the class level, they are all simply disks. Classes allow user space
385 * to work with devices based on what they do, rather than how they are
386 * connected or how they work.
390 struct module
*owner
;
392 struct class_attribute
*class_attrs
;
393 const struct attribute_group
**dev_groups
;
394 struct kobject
*dev_kobj
;
396 int (*dev_uevent
)(struct device
*dev
, struct kobj_uevent_env
*env
);
397 char *(*devnode
)(struct device
*dev
, umode_t
*mode
);
399 void (*class_release
)(struct class *class);
400 void (*dev_release
)(struct device
*dev
);
402 int (*suspend
)(struct device
*dev
, pm_message_t state
);
403 int (*resume
)(struct device
*dev
);
405 const struct kobj_ns_type_operations
*ns_type
;
406 const void *(*namespace)(struct device
*dev
);
408 const struct dev_pm_ops
*pm
;
410 struct subsys_private
*p
;
413 struct class_dev_iter
{
414 struct klist_iter ki
;
415 const struct device_type
*type
;
418 extern struct kobject
*sysfs_dev_block_kobj
;
419 extern struct kobject
*sysfs_dev_char_kobj
;
420 extern int __must_check
__class_register(struct class *class,
421 struct lock_class_key
*key
);
422 extern void class_unregister(struct class *class);
424 /* This is a #define to keep the compiler from merging different
425 * instances of the __key variable */
426 #define class_register(class) \
428 static struct lock_class_key __key; \
429 __class_register(class, &__key); \
433 struct class_compat
*class_compat_register(const char *name
);
434 void class_compat_unregister(struct class_compat
*cls
);
435 int class_compat_create_link(struct class_compat
*cls
, struct device
*dev
,
436 struct device
*device_link
);
437 void class_compat_remove_link(struct class_compat
*cls
, struct device
*dev
,
438 struct device
*device_link
);
440 extern void class_dev_iter_init(struct class_dev_iter
*iter
,
442 struct device
*start
,
443 const struct device_type
*type
);
444 extern struct device
*class_dev_iter_next(struct class_dev_iter
*iter
);
445 extern void class_dev_iter_exit(struct class_dev_iter
*iter
);
447 extern int class_for_each_device(struct class *class, struct device
*start
,
449 int (*fn
)(struct device
*dev
, void *data
));
450 extern struct device
*class_find_device(struct class *class,
451 struct device
*start
, const void *data
,
452 int (*match
)(struct device
*, const void *));
454 struct class_attribute
{
455 struct attribute attr
;
456 ssize_t (*show
)(struct class *class, struct class_attribute
*attr
,
458 ssize_t (*store
)(struct class *class, struct class_attribute
*attr
,
459 const char *buf
, size_t count
);
462 #define CLASS_ATTR(_name, _mode, _show, _store) \
463 struct class_attribute class_attr_##_name = __ATTR(_name, _mode, _show, _store)
464 #define CLASS_ATTR_RW(_name) \
465 struct class_attribute class_attr_##_name = __ATTR_RW(_name)
466 #define CLASS_ATTR_RO(_name) \
467 struct class_attribute class_attr_##_name = __ATTR_RO(_name)
469 extern int __must_check
class_create_file_ns(struct class *class,
470 const struct class_attribute
*attr
,
472 extern void class_remove_file_ns(struct class *class,
473 const struct class_attribute
*attr
,
476 static inline int __must_check
class_create_file(struct class *class,
477 const struct class_attribute
*attr
)
479 return class_create_file_ns(class, attr
, NULL
);
482 static inline void class_remove_file(struct class *class,
483 const struct class_attribute
*attr
)
485 return class_remove_file_ns(class, attr
, NULL
);
488 /* Simple class attribute that is just a static string */
489 struct class_attribute_string
{
490 struct class_attribute attr
;
494 /* Currently read-only only */
495 #define _CLASS_ATTR_STRING(_name, _mode, _str) \
496 { __ATTR(_name, _mode, show_class_attr_string, NULL), _str }
497 #define CLASS_ATTR_STRING(_name, _mode, _str) \
498 struct class_attribute_string class_attr_##_name = \
499 _CLASS_ATTR_STRING(_name, _mode, _str)
501 extern ssize_t
show_class_attr_string(struct class *class, struct class_attribute
*attr
,
504 struct class_interface
{
505 struct list_head node
;
508 int (*add_dev
) (struct device
*, struct class_interface
*);
509 void (*remove_dev
) (struct device
*, struct class_interface
*);
512 extern int __must_check
class_interface_register(struct class_interface
*);
513 extern void class_interface_unregister(struct class_interface
*);
515 extern struct class * __must_check
__class_create(struct module
*owner
,
517 struct lock_class_key
*key
);
518 extern void class_destroy(struct class *cls
);
520 /* This is a #define to keep the compiler from merging different
521 * instances of the __key variable */
522 #define class_create(owner, name) \
524 static struct lock_class_key __key; \
525 __class_create(owner, name, &__key); \
529 * The type of device, "struct device" is embedded in. A class
530 * or bus can contain devices of different types
531 * like "partitions" and "disks", "mouse" and "event".
532 * This identifies the device type and carries type-specific
533 * information, equivalent to the kobj_type of a kobject.
534 * If "name" is specified, the uevent will contain it in
535 * the DEVTYPE variable.
539 const struct attribute_group
**groups
;
540 int (*uevent
)(struct device
*dev
, struct kobj_uevent_env
*env
);
541 char *(*devnode
)(struct device
*dev
, umode_t
*mode
,
542 kuid_t
*uid
, kgid_t
*gid
);
543 void (*release
)(struct device
*dev
);
545 const struct dev_pm_ops
*pm
;
548 /* interface for exporting device attributes */
549 struct device_attribute
{
550 struct attribute attr
;
551 ssize_t (*show
)(struct device
*dev
, struct device_attribute
*attr
,
553 ssize_t (*store
)(struct device
*dev
, struct device_attribute
*attr
,
554 const char *buf
, size_t count
);
557 struct dev_ext_attribute
{
558 struct device_attribute attr
;
562 ssize_t
device_show_ulong(struct device
*dev
, struct device_attribute
*attr
,
564 ssize_t
device_store_ulong(struct device
*dev
, struct device_attribute
*attr
,
565 const char *buf
, size_t count
);
566 ssize_t
device_show_int(struct device
*dev
, struct device_attribute
*attr
,
568 ssize_t
device_store_int(struct device
*dev
, struct device_attribute
*attr
,
569 const char *buf
, size_t count
);
570 ssize_t
device_show_bool(struct device
*dev
, struct device_attribute
*attr
,
572 ssize_t
device_store_bool(struct device
*dev
, struct device_attribute
*attr
,
573 const char *buf
, size_t count
);
575 #define DEVICE_ATTR(_name, _mode, _show, _store) \
576 struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store)
577 #define DEVICE_ATTR_RW(_name) \
578 struct device_attribute dev_attr_##_name = __ATTR_RW(_name)
579 #define DEVICE_ATTR_RO(_name) \
580 struct device_attribute dev_attr_##_name = __ATTR_RO(_name)
581 #define DEVICE_ATTR_WO(_name) \
582 struct device_attribute dev_attr_##_name = __ATTR_WO(_name)
583 #define DEVICE_ULONG_ATTR(_name, _mode, _var) \
584 struct dev_ext_attribute dev_attr_##_name = \
585 { __ATTR(_name, _mode, device_show_ulong, device_store_ulong), &(_var) }
586 #define DEVICE_INT_ATTR(_name, _mode, _var) \
587 struct dev_ext_attribute dev_attr_##_name = \
588 { __ATTR(_name, _mode, device_show_int, device_store_int), &(_var) }
589 #define DEVICE_BOOL_ATTR(_name, _mode, _var) \
590 struct dev_ext_attribute dev_attr_##_name = \
591 { __ATTR(_name, _mode, device_show_bool, device_store_bool), &(_var) }
592 #define DEVICE_ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store) \
593 struct device_attribute dev_attr_##_name = \
594 __ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store)
596 extern int device_create_file(struct device
*device
,
597 const struct device_attribute
*entry
);
598 extern void device_remove_file(struct device
*dev
,
599 const struct device_attribute
*attr
);
600 extern bool device_remove_file_self(struct device
*dev
,
601 const struct device_attribute
*attr
);
602 extern int __must_check
device_create_bin_file(struct device
*dev
,
603 const struct bin_attribute
*attr
);
604 extern void device_remove_bin_file(struct device
*dev
,
605 const struct bin_attribute
*attr
);
607 /* device resource management */
608 typedef void (*dr_release_t
)(struct device
*dev
, void *res
);
609 typedef int (*dr_match_t
)(struct device
*dev
, void *res
, void *match_data
);
611 #ifdef CONFIG_DEBUG_DEVRES
612 extern void *__devres_alloc_node(dr_release_t release
, size_t size
, gfp_t gfp
,
613 int nid
, const char *name
) __malloc
;
614 #define devres_alloc(release, size, gfp) \
615 __devres_alloc_node(release, size, gfp, NUMA_NO_NODE, #release)
616 #define devres_alloc_node(release, size, gfp, nid) \
617 __devres_alloc_node(release, size, gfp, nid, #release)
619 extern void *devres_alloc_node(dr_release_t release
, size_t size
, gfp_t gfp
,
621 static inline void *devres_alloc(dr_release_t release
, size_t size
, gfp_t gfp
)
623 return devres_alloc_node(release
, size
, gfp
, NUMA_NO_NODE
);
627 extern void devres_for_each_res(struct device
*dev
, dr_release_t release
,
628 dr_match_t match
, void *match_data
,
629 void (*fn
)(struct device
*, void *, void *),
631 extern void devres_free(void *res
);
632 extern void devres_add(struct device
*dev
, void *res
);
633 extern void *devres_find(struct device
*dev
, dr_release_t release
,
634 dr_match_t match
, void *match_data
);
635 extern void *devres_get(struct device
*dev
, void *new_res
,
636 dr_match_t match
, void *match_data
);
637 extern void *devres_remove(struct device
*dev
, dr_release_t release
,
638 dr_match_t match
, void *match_data
);
639 extern int devres_destroy(struct device
*dev
, dr_release_t release
,
640 dr_match_t match
, void *match_data
);
641 extern int devres_release(struct device
*dev
, dr_release_t release
,
642 dr_match_t match
, void *match_data
);
645 extern void * __must_check
devres_open_group(struct device
*dev
, void *id
,
647 extern void devres_close_group(struct device
*dev
, void *id
);
648 extern void devres_remove_group(struct device
*dev
, void *id
);
649 extern int devres_release_group(struct device
*dev
, void *id
);
651 /* managed devm_k.alloc/kfree for device drivers */
652 extern void *devm_kmalloc(struct device
*dev
, size_t size
, gfp_t gfp
) __malloc
;
653 extern __printf(3, 0)
654 char *devm_kvasprintf(struct device
*dev
, gfp_t gfp
, const char *fmt
,
655 va_list ap
) __malloc
;
656 extern __printf(3, 4)
657 char *devm_kasprintf(struct device
*dev
, gfp_t gfp
, const char *fmt
, ...) __malloc
;
658 static inline void *devm_kzalloc(struct device
*dev
, size_t size
, gfp_t gfp
)
660 return devm_kmalloc(dev
, size
, gfp
| __GFP_ZERO
);
662 static inline void *devm_kmalloc_array(struct device
*dev
,
663 size_t n
, size_t size
, gfp_t flags
)
665 if (size
!= 0 && n
> SIZE_MAX
/ size
)
667 return devm_kmalloc(dev
, n
* size
, flags
);
669 static inline void *devm_kcalloc(struct device
*dev
,
670 size_t n
, size_t size
, gfp_t flags
)
672 return devm_kmalloc_array(dev
, n
, size
, flags
| __GFP_ZERO
);
674 extern void devm_kfree(struct device
*dev
, void *p
);
675 extern char *devm_kstrdup(struct device
*dev
, const char *s
, gfp_t gfp
) __malloc
;
676 extern void *devm_kmemdup(struct device
*dev
, const void *src
, size_t len
,
679 extern unsigned long devm_get_free_pages(struct device
*dev
,
680 gfp_t gfp_mask
, unsigned int order
);
681 extern void devm_free_pages(struct device
*dev
, unsigned long addr
);
683 void __iomem
*devm_ioremap_resource(struct device
*dev
, struct resource
*res
);
685 /* allows to add/remove a custom action to devres stack */
686 int devm_add_action(struct device
*dev
, void (*action
)(void *), void *data
);
687 void devm_remove_action(struct device
*dev
, void (*action
)(void *), void *data
);
689 static inline int devm_add_action_or_reset(struct device
*dev
,
690 void (*action
)(void *), void *data
)
694 ret
= devm_add_action(dev
, action
, data
);
701 struct device_dma_parameters
{
703 * a low level driver may set these to teach IOMMU code about
706 unsigned int max_segment_size
;
707 unsigned long segment_boundary_mask
;
711 * struct device - The basic device structure
712 * @parent: The device's "parent" device, the device to which it is attached.
713 * In most cases, a parent device is some sort of bus or host
714 * controller. If parent is NULL, the device, is a top-level device,
715 * which is not usually what you want.
716 * @p: Holds the private data of the driver core portions of the device.
717 * See the comment of the struct device_private for detail.
718 * @kobj: A top-level, abstract class from which other classes are derived.
719 * @init_name: Initial name of the device.
720 * @type: The type of device.
721 * This identifies the device type and carries type-specific
723 * @mutex: Mutex to synchronize calls to its driver.
724 * @bus: Type of bus device is on.
725 * @driver: Which driver has allocated this
726 * @platform_data: Platform data specific to the device.
727 * Example: For devices on custom boards, as typical of embedded
728 * and SOC based hardware, Linux often uses platform_data to point
729 * to board-specific structures describing devices and how they
730 * are wired. That can include what ports are available, chip
731 * variants, which GPIO pins act in what additional roles, and so
732 * on. This shrinks the "Board Support Packages" (BSPs) and
733 * minimizes board-specific #ifdefs in drivers.
734 * @driver_data: Private pointer for driver specific info.
735 * @power: For device power management.
736 * See Documentation/power/devices.txt for details.
737 * @pm_domain: Provide callbacks that are executed during system suspend,
738 * hibernation, system resume and during runtime PM transitions
739 * along with subsystem-level and driver-level callbacks.
740 * @pins: For device pin management.
741 * See Documentation/pinctrl.txt for details.
742 * @msi_list: Hosts MSI descriptors
743 * @msi_domain: The generic MSI domain this device is using.
744 * @numa_node: NUMA node this device is close to.
745 * @dma_mask: Dma mask (if dma'ble device).
746 * @coherent_dma_mask: Like dma_mask, but for alloc_coherent mapping as not all
747 * hardware supports 64-bit addresses for consistent allocations
749 * @dma_pfn_offset: offset of DMA memory range relatively of RAM
750 * @dma_parms: A low level driver may set these to teach IOMMU code about
751 * segment limitations.
752 * @dma_pools: Dma pools (if dma'ble device).
753 * @dma_mem: Internal for coherent mem override.
754 * @cma_area: Contiguous memory area for dma allocations
755 * @archdata: For arch-specific additions.
756 * @of_node: Associated device tree node.
757 * @fwnode: Associated device node supplied by platform firmware.
758 * @devt: For creating the sysfs "dev".
759 * @id: device instance
760 * @devres_lock: Spinlock to protect the resource of the device.
761 * @devres_head: The resources list of the device.
762 * @knode_class: The node used to add the device to the class list.
763 * @class: The class of the device.
764 * @groups: Optional attribute groups.
765 * @release: Callback to free the device after all references have
766 * gone away. This should be set by the allocator of the
767 * device (i.e. the bus driver that discovered the device).
768 * @iommu_group: IOMMU group the device belongs to.
769 * @iommu_fwspec: IOMMU-specific properties supplied by firmware.
771 * @offline_disabled: If set, the device is permanently online.
772 * @offline: Set after successful invocation of bus type's .offline().
774 * At the lowest level, every device in a Linux system is represented by an
775 * instance of struct device. The device structure contains the information
776 * that the device model core needs to model the system. Most subsystems,
777 * however, track additional information about the devices they host. As a
778 * result, it is rare for devices to be represented by bare device structures;
779 * instead, that structure, like kobject structures, is usually embedded within
780 * a higher-level representation of the device.
783 struct device
*parent
;
785 struct device_private
*p
;
788 const char *init_name
; /* initial name of the device */
789 const struct device_type
*type
;
791 struct mutex mutex
; /* mutex to synchronize calls to
795 struct bus_type
*bus
; /* type of bus device is on */
796 struct device_driver
*driver
; /* which driver has allocated this
798 void *platform_data
; /* Platform specific data, device
799 core doesn't touch it */
800 void *driver_data
; /* Driver data, set and get with
801 dev_set/get_drvdata */
802 struct dev_pm_info power
;
803 struct dev_pm_domain
*pm_domain
;
805 #ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
806 struct irq_domain
*msi_domain
;
808 #ifdef CONFIG_PINCTRL
809 struct dev_pin_info
*pins
;
811 #ifdef CONFIG_GENERIC_MSI_IRQ
812 struct list_head msi_list
;
816 int numa_node
; /* NUMA node this device is close to */
818 u64
*dma_mask
; /* dma mask (if dma'able device) */
819 u64 coherent_dma_mask
;/* Like dma_mask, but for
820 alloc_coherent mappings as
821 not all hardware supports
822 64 bit addresses for consistent
823 allocations such descriptors. */
824 unsigned long dma_pfn_offset
;
826 struct device_dma_parameters
*dma_parms
;
828 struct list_head dma_pools
; /* dma pools (if dma'ble) */
830 struct dma_coherent_mem
*dma_mem
; /* internal for coherent mem
832 #ifdef CONFIG_DMA_CMA
833 struct cma
*cma_area
; /* contiguous memory area for dma
836 /* arch specific additions */
837 struct dev_archdata archdata
;
839 struct device_node
*of_node
; /* associated device tree node */
840 struct fwnode_handle
*fwnode
; /* firmware device node */
842 dev_t devt
; /* dev_t, creates the sysfs "dev" */
843 u32 id
; /* device instance */
845 spinlock_t devres_lock
;
846 struct list_head devres_head
;
848 struct klist_node knode_class
;
850 const struct attribute_group
**groups
; /* optional groups */
852 void (*release
)(struct device
*dev
);
853 struct iommu_group
*iommu_group
;
854 struct iommu_fwspec
*iommu_fwspec
;
856 bool offline_disabled
:1;
860 static inline struct device
*kobj_to_dev(struct kobject
*kobj
)
862 return container_of(kobj
, struct device
, kobj
);
865 /* Get the wakeup routines, which depend on struct device */
866 #include <linux/pm_wakeup.h>
868 static inline const char *dev_name(const struct device
*dev
)
870 /* Use the init name until the kobject becomes available */
872 return dev
->init_name
;
874 return kobject_name(&dev
->kobj
);
877 extern __printf(2, 3)
878 int dev_set_name(struct device
*dev
, const char *name
, ...);
881 static inline int dev_to_node(struct device
*dev
)
883 return dev
->numa_node
;
885 static inline void set_dev_node(struct device
*dev
, int node
)
887 dev
->numa_node
= node
;
890 static inline int dev_to_node(struct device
*dev
)
894 static inline void set_dev_node(struct device
*dev
, int node
)
899 static inline struct irq_domain
*dev_get_msi_domain(const struct device
*dev
)
901 #ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
902 return dev
->msi_domain
;
908 static inline void dev_set_msi_domain(struct device
*dev
, struct irq_domain
*d
)
910 #ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
915 static inline void *dev_get_drvdata(const struct device
*dev
)
917 return dev
->driver_data
;
920 static inline void dev_set_drvdata(struct device
*dev
, void *data
)
922 dev
->driver_data
= data
;
925 static inline struct pm_subsys_data
*dev_to_psd(struct device
*dev
)
927 return dev
? dev
->power
.subsys_data
: NULL
;
930 static inline unsigned int dev_get_uevent_suppress(const struct device
*dev
)
932 return dev
->kobj
.uevent_suppress
;
935 static inline void dev_set_uevent_suppress(struct device
*dev
, int val
)
937 dev
->kobj
.uevent_suppress
= val
;
940 static inline int device_is_registered(struct device
*dev
)
942 return dev
->kobj
.state_in_sysfs
;
945 static inline void device_enable_async_suspend(struct device
*dev
)
947 if (!dev
->power
.is_prepared
)
948 dev
->power
.async_suspend
= true;
951 static inline void device_disable_async_suspend(struct device
*dev
)
953 if (!dev
->power
.is_prepared
)
954 dev
->power
.async_suspend
= false;
957 static inline bool device_async_suspend_enabled(struct device
*dev
)
959 return !!dev
->power
.async_suspend
;
962 static inline void dev_pm_syscore_device(struct device
*dev
, bool val
)
964 #ifdef CONFIG_PM_SLEEP
965 dev
->power
.syscore
= val
;
969 static inline void device_lock(struct device
*dev
)
971 mutex_lock(&dev
->mutex
);
974 static inline int device_lock_interruptible(struct device
*dev
)
976 return mutex_lock_interruptible(&dev
->mutex
);
979 static inline int device_trylock(struct device
*dev
)
981 return mutex_trylock(&dev
->mutex
);
984 static inline void device_unlock(struct device
*dev
)
986 mutex_unlock(&dev
->mutex
);
989 static inline void device_lock_assert(struct device
*dev
)
991 lockdep_assert_held(&dev
->mutex
);
994 static inline struct device_node
*dev_of_node(struct device
*dev
)
996 if (!IS_ENABLED(CONFIG_OF
))
1001 void driver_init(void);
1004 * High level routines for use by the bus drivers
1006 extern int __must_check
device_register(struct device
*dev
);
1007 extern void device_unregister(struct device
*dev
);
1008 extern void device_initialize(struct device
*dev
);
1009 extern int __must_check
device_add(struct device
*dev
);
1010 extern void device_del(struct device
*dev
);
1011 extern int device_for_each_child(struct device
*dev
, void *data
,
1012 int (*fn
)(struct device
*dev
, void *data
));
1013 extern int device_for_each_child_reverse(struct device
*dev
, void *data
,
1014 int (*fn
)(struct device
*dev
, void *data
));
1015 extern struct device
*device_find_child(struct device
*dev
, void *data
,
1016 int (*match
)(struct device
*dev
, void *data
));
1017 extern int device_rename(struct device
*dev
, const char *new_name
);
1018 extern int device_move(struct device
*dev
, struct device
*new_parent
,
1019 enum dpm_order dpm_order
);
1020 extern const char *device_get_devnode(struct device
*dev
,
1021 umode_t
*mode
, kuid_t
*uid
, kgid_t
*gid
,
1024 static inline bool device_supports_offline(struct device
*dev
)
1026 return dev
->bus
&& dev
->bus
->offline
&& dev
->bus
->online
;
1029 extern void lock_device_hotplug(void);
1030 extern void unlock_device_hotplug(void);
1031 extern int lock_device_hotplug_sysfs(void);
1032 extern int device_offline(struct device
*dev
);
1033 extern int device_online(struct device
*dev
);
1034 extern void set_primary_fwnode(struct device
*dev
, struct fwnode_handle
*fwnode
);
1035 extern void set_secondary_fwnode(struct device
*dev
, struct fwnode_handle
*fwnode
);
1038 * Root device objects for grouping under /sys/devices
1040 extern struct device
*__root_device_register(const char *name
,
1041 struct module
*owner
);
1043 /* This is a macro to avoid include problems with THIS_MODULE */
1044 #define root_device_register(name) \
1045 __root_device_register(name, THIS_MODULE)
1047 extern void root_device_unregister(struct device
*root
);
1049 static inline void *dev_get_platdata(const struct device
*dev
)
1051 return dev
->platform_data
;
1055 * Manual binding of a device to driver. See drivers/base/bus.c
1056 * for information on use.
1058 extern int __must_check
device_bind_driver(struct device
*dev
);
1059 extern void device_release_driver(struct device
*dev
);
1060 extern int __must_check
device_attach(struct device
*dev
);
1061 extern int __must_check
driver_attach(struct device_driver
*drv
);
1062 extern void device_initial_probe(struct device
*dev
);
1063 extern int __must_check
device_reprobe(struct device
*dev
);
1065 extern bool device_is_bound(struct device
*dev
);
1068 * Easy functions for dynamically creating devices on the fly
1070 extern __printf(5, 0)
1071 struct device
*device_create_vargs(struct class *cls
, struct device
*parent
,
1072 dev_t devt
, void *drvdata
,
1073 const char *fmt
, va_list vargs
);
1074 extern __printf(5, 6)
1075 struct device
*device_create(struct class *cls
, struct device
*parent
,
1076 dev_t devt
, void *drvdata
,
1077 const char *fmt
, ...);
1078 extern __printf(6, 7)
1079 struct device
*device_create_with_groups(struct class *cls
,
1080 struct device
*parent
, dev_t devt
, void *drvdata
,
1081 const struct attribute_group
**groups
,
1082 const char *fmt
, ...);
1083 extern void device_destroy(struct class *cls
, dev_t devt
);
1086 * Platform "fixup" functions - allow the platform to have their say
1087 * about devices and actions that the general device layer doesn't
1090 /* Notify platform of device discovery */
1091 extern int (*platform_notify
)(struct device
*dev
);
1093 extern int (*platform_notify_remove
)(struct device
*dev
);
1097 * get_device - atomically increment the reference count for the device.
1100 extern struct device
*get_device(struct device
*dev
);
1101 extern void put_device(struct device
*dev
);
1103 #ifdef CONFIG_DEVTMPFS
1104 extern int devtmpfs_create_node(struct device
*dev
);
1105 extern int devtmpfs_delete_node(struct device
*dev
);
1106 extern int devtmpfs_mount(const char *mntdir
);
1108 static inline int devtmpfs_create_node(struct device
*dev
) { return 0; }
1109 static inline int devtmpfs_delete_node(struct device
*dev
) { return 0; }
1110 static inline int devtmpfs_mount(const char *mountpoint
) { return 0; }
1113 /* drivers/base/power/shutdown.c */
1114 extern void device_shutdown(void);
1116 /* debugging and troubleshooting/diagnostic helpers. */
1117 extern const char *dev_driver_string(const struct device
*dev
);
1120 #ifdef CONFIG_PRINTK
1122 extern __printf(3, 0)
1123 int dev_vprintk_emit(int level
, const struct device
*dev
,
1124 const char *fmt
, va_list args
);
1125 extern __printf(3, 4)
1126 int dev_printk_emit(int level
, const struct device
*dev
, const char *fmt
, ...);
1128 extern __printf(3, 4)
1129 void dev_printk(const char *level
, const struct device
*dev
,
1130 const char *fmt
, ...);
1131 extern __printf(2, 3)
1132 void dev_emerg(const struct device
*dev
, const char *fmt
, ...);
1133 extern __printf(2, 3)
1134 void dev_alert(const struct device
*dev
, const char *fmt
, ...);
1135 extern __printf(2, 3)
1136 void dev_crit(const struct device
*dev
, const char *fmt
, ...);
1137 extern __printf(2, 3)
1138 void dev_err(const struct device
*dev
, const char *fmt
, ...);
1139 extern __printf(2, 3)
1140 void dev_warn(const struct device
*dev
, const char *fmt
, ...);
1141 extern __printf(2, 3)
1142 void dev_notice(const struct device
*dev
, const char *fmt
, ...);
1143 extern __printf(2, 3)
1144 void _dev_info(const struct device
*dev
, const char *fmt
, ...);
1148 static inline __printf(3, 0)
1149 int dev_vprintk_emit(int level
, const struct device
*dev
,
1150 const char *fmt
, va_list args
)
1152 static inline __printf(3, 4)
1153 int dev_printk_emit(int level
, const struct device
*dev
, const char *fmt
, ...)
1156 static inline void __dev_printk(const char *level
, const struct device
*dev
,
1157 struct va_format
*vaf
)
1159 static inline __printf(3, 4)
1160 void dev_printk(const char *level
, const struct device
*dev
,
1161 const char *fmt
, ...)
1164 static inline __printf(2, 3)
1165 void dev_emerg(const struct device
*dev
, const char *fmt
, ...)
1167 static inline __printf(2, 3)
1168 void dev_crit(const struct device
*dev
, const char *fmt
, ...)
1170 static inline __printf(2, 3)
1171 void dev_alert(const struct device
*dev
, const char *fmt
, ...)
1173 static inline __printf(2, 3)
1174 void dev_err(const struct device
*dev
, const char *fmt
, ...)
1176 static inline __printf(2, 3)
1177 void dev_warn(const struct device
*dev
, const char *fmt
, ...)
1179 static inline __printf(2, 3)
1180 void dev_notice(const struct device
*dev
, const char *fmt
, ...)
1182 static inline __printf(2, 3)
1183 void _dev_info(const struct device
*dev
, const char *fmt
, ...)
1189 * Stupid hackaround for existing uses of non-printk uses dev_info
1191 * Note that the definition of dev_info below is actually _dev_info
1192 * and a macro is used to avoid redefining dev_info
1195 #define dev_info(dev, fmt, arg...) _dev_info(dev, fmt, ##arg)
1197 #if defined(CONFIG_DYNAMIC_DEBUG)
1198 #define dev_dbg(dev, format, ...) \
1200 dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \
1202 #elif defined(DEBUG)
1203 #define dev_dbg(dev, format, arg...) \
1204 dev_printk(KERN_DEBUG, dev, format, ##arg)
1206 #define dev_dbg(dev, format, arg...) \
1209 dev_printk(KERN_DEBUG, dev, format, ##arg); \
1213 #ifdef CONFIG_PRINTK
1214 #define dev_level_once(dev_level, dev, fmt, ...) \
1216 static bool __print_once __read_mostly; \
1218 if (!__print_once) { \
1219 __print_once = true; \
1220 dev_level(dev, fmt, ##__VA_ARGS__); \
1224 #define dev_level_once(dev_level, dev, fmt, ...) \
1227 dev_level(dev, fmt, ##__VA_ARGS__); \
1231 #define dev_emerg_once(dev, fmt, ...) \
1232 dev_level_once(dev_emerg, dev, fmt, ##__VA_ARGS__)
1233 #define dev_alert_once(dev, fmt, ...) \
1234 dev_level_once(dev_alert, dev, fmt, ##__VA_ARGS__)
1235 #define dev_crit_once(dev, fmt, ...) \
1236 dev_level_once(dev_crit, dev, fmt, ##__VA_ARGS__)
1237 #define dev_err_once(dev, fmt, ...) \
1238 dev_level_once(dev_err, dev, fmt, ##__VA_ARGS__)
1239 #define dev_warn_once(dev, fmt, ...) \
1240 dev_level_once(dev_warn, dev, fmt, ##__VA_ARGS__)
1241 #define dev_notice_once(dev, fmt, ...) \
1242 dev_level_once(dev_notice, dev, fmt, ##__VA_ARGS__)
1243 #define dev_info_once(dev, fmt, ...) \
1244 dev_level_once(dev_info, dev, fmt, ##__VA_ARGS__)
1245 #define dev_dbg_once(dev, fmt, ...) \
1246 dev_level_once(dev_dbg, dev, fmt, ##__VA_ARGS__)
1248 #define dev_level_ratelimited(dev_level, dev, fmt, ...) \
1250 static DEFINE_RATELIMIT_STATE(_rs, \
1251 DEFAULT_RATELIMIT_INTERVAL, \
1252 DEFAULT_RATELIMIT_BURST); \
1253 if (__ratelimit(&_rs)) \
1254 dev_level(dev, fmt, ##__VA_ARGS__); \
1257 #define dev_emerg_ratelimited(dev, fmt, ...) \
1258 dev_level_ratelimited(dev_emerg, dev, fmt, ##__VA_ARGS__)
1259 #define dev_alert_ratelimited(dev, fmt, ...) \
1260 dev_level_ratelimited(dev_alert, dev, fmt, ##__VA_ARGS__)
1261 #define dev_crit_ratelimited(dev, fmt, ...) \
1262 dev_level_ratelimited(dev_crit, dev, fmt, ##__VA_ARGS__)
1263 #define dev_err_ratelimited(dev, fmt, ...) \
1264 dev_level_ratelimited(dev_err, dev, fmt, ##__VA_ARGS__)
1265 #define dev_warn_ratelimited(dev, fmt, ...) \
1266 dev_level_ratelimited(dev_warn, dev, fmt, ##__VA_ARGS__)
1267 #define dev_notice_ratelimited(dev, fmt, ...) \
1268 dev_level_ratelimited(dev_notice, dev, fmt, ##__VA_ARGS__)
1269 #define dev_info_ratelimited(dev, fmt, ...) \
1270 dev_level_ratelimited(dev_info, dev, fmt, ##__VA_ARGS__)
1271 #if defined(CONFIG_DYNAMIC_DEBUG)
1272 /* descriptor check is first to prevent flooding with "callbacks suppressed" */
1273 #define dev_dbg_ratelimited(dev, fmt, ...) \
1275 static DEFINE_RATELIMIT_STATE(_rs, \
1276 DEFAULT_RATELIMIT_INTERVAL, \
1277 DEFAULT_RATELIMIT_BURST); \
1278 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
1279 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT) && \
1280 __ratelimit(&_rs)) \
1281 __dynamic_dev_dbg(&descriptor, dev, fmt, \
1284 #elif defined(DEBUG)
1285 #define dev_dbg_ratelimited(dev, fmt, ...) \
1287 static DEFINE_RATELIMIT_STATE(_rs, \
1288 DEFAULT_RATELIMIT_INTERVAL, \
1289 DEFAULT_RATELIMIT_BURST); \
1290 if (__ratelimit(&_rs)) \
1291 dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); \
1294 #define dev_dbg_ratelimited(dev, fmt, ...) \
1297 dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); \
1301 #ifdef VERBOSE_DEBUG
1302 #define dev_vdbg dev_dbg
1304 #define dev_vdbg(dev, format, arg...) \
1307 dev_printk(KERN_DEBUG, dev, format, ##arg); \
1312 * dev_WARN*() acts like dev_printk(), but with the key difference of
1313 * using WARN/WARN_ONCE to include file/line information and a backtrace.
1315 #define dev_WARN(dev, format, arg...) \
1316 WARN(1, "%s %s: " format, dev_driver_string(dev), dev_name(dev), ## arg);
1318 #define dev_WARN_ONCE(dev, condition, format, arg...) \
1319 WARN_ONCE(condition, "%s %s: " format, \
1320 dev_driver_string(dev), dev_name(dev), ## arg)
1322 /* Create alias, so I can be autoloaded. */
1323 #define MODULE_ALIAS_CHARDEV(major,minor) \
1324 MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor))
1325 #define MODULE_ALIAS_CHARDEV_MAJOR(major) \
1326 MODULE_ALIAS("char-major-" __stringify(major) "-*")
1328 #ifdef CONFIG_SYSFS_DEPRECATED
1329 extern long sysfs_deprecated
;
1331 #define sysfs_deprecated 0
1335 * module_driver() - Helper macro for drivers that don't do anything
1336 * special in module init/exit. This eliminates a lot of boilerplate.
1337 * Each module may only use this macro once, and calling it replaces
1338 * module_init() and module_exit().
1340 * @__driver: driver name
1341 * @__register: register function for this driver type
1342 * @__unregister: unregister function for this driver type
1343 * @...: Additional arguments to be passed to __register and __unregister.
1345 * Use this macro to construct bus specific macros for registering
1346 * drivers, and do not use it on its own.
1348 #define module_driver(__driver, __register, __unregister, ...) \
1349 static int __init __driver##_init(void) \
1351 return __register(&(__driver) , ##__VA_ARGS__); \
1353 module_init(__driver##_init); \
1354 static void __exit __driver##_exit(void) \
1356 __unregister(&(__driver) , ##__VA_ARGS__); \
1358 module_exit(__driver##_exit);
1361 * builtin_driver() - Helper macro for drivers that don't do anything
1362 * special in init and have no exit. This eliminates some boilerplate.
1363 * Each driver may only use this macro once, and calling it replaces
1364 * device_initcall (or in some cases, the legacy __initcall). This is
1365 * meant to be a direct parallel of module_driver() above but without
1366 * the __exit stuff that is not used for builtin cases.
1368 * @__driver: driver name
1369 * @__register: register function for this driver type
1370 * @...: Additional arguments to be passed to __register
1372 * Use this macro to construct bus specific macros for registering
1373 * drivers, and do not use it on its own.
1375 #define builtin_driver(__driver, __register, ...) \
1376 static int __init __driver##_init(void) \
1378 return __register(&(__driver) , ##__VA_ARGS__); \
1380 device_initcall(__driver##_init);
1382 #endif /* _DEVICE_H_ */