1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Copyright (c) 2013 Google, Inc
6 * Pavel Herrmann <morpheus.ibis@gmail.com>
7 * Marek Vasut <marex@denx.de>
13 #include <dm/ofnode.h>
14 #include <dm/uclass-id.h>
16 #include <linker_lists.h>
17 #include <linux/compat.h>
18 #include <linux/kernel.h>
19 #include <linux/list.h>
20 #include <linux/printk.h>
24 /* Driver is active (probed). Cleared when it is removed */
25 #define DM_FLAG_ACTIVATED (1 << 0)
27 /* DM is responsible for allocating and freeing platdata */
28 #define DM_FLAG_ALLOC_PDATA (1 << 1)
30 /* DM should init this device prior to relocation */
31 #define DM_FLAG_PRE_RELOC (1 << 2)
33 /* DM is responsible for allocating and freeing parent_platdata */
34 #define DM_FLAG_ALLOC_PARENT_PDATA (1 << 3)
36 /* DM is responsible for allocating and freeing uclass_platdata */
37 #define DM_FLAG_ALLOC_UCLASS_PDATA (1 << 4)
39 /* Allocate driver private data on a DMA boundary */
40 #define DM_FLAG_ALLOC_PRIV_DMA (1 << 5)
43 #define DM_FLAG_BOUND (1 << 6)
45 /* Device name is allocated and should be freed on unbind() */
46 #define DM_FLAG_NAME_ALLOCED (1 << 7)
48 #define DM_FLAG_OF_PLATDATA (1 << 8)
51 * Call driver remove function to stop currently active DMA transfers or
52 * give DMA buffers back to the HW / controller. This may be needed for
53 * some drivers to do some final stage cleanup before the OS is called
56 #define DM_FLAG_ACTIVE_DMA (1 << 9)
59 * Call driver remove function to do some final configuration, before
60 * U-Boot exits and the OS is started
62 #define DM_FLAG_OS_PREPARE (1 << 10)
65 * One or multiple of these flags are passed to device_remove() so that
66 * a selective device removal as specified by the remove-stage and the
67 * driver flags can be done.
70 /* Normal remove, remove all devices */
71 DM_REMOVE_NORMAL = 1 << 0,
73 /* Remove devices with active DMA */
74 DM_REMOVE_ACTIVE_DMA = DM_FLAG_ACTIVE_DMA,
76 /* Remove devices which need some final OS preparation steps */
77 DM_REMOVE_OS_PREPARE = DM_FLAG_OS_PREPARE,
79 /* Add more use cases here */
81 /* Remove devices with any active flag */
82 DM_REMOVE_ACTIVE_ALL = DM_REMOVE_ACTIVE_DMA | DM_REMOVE_OS_PREPARE,
86 * struct udevice - An instance of a driver
88 * This holds information about a device, which is a driver bound to a
89 * particular port or peripheral (essentially a driver instance).
91 * A device will come into existence through a 'bind' call, either due to
92 * a U_BOOT_DEVICE() macro (in which case platdata is non-NULL) or a node
93 * in the device tree (in which case of_offset is >= 0). In the latter case
94 * we translate the device tree information into platdata in a function
95 * implemented by the driver ofdata_to_platdata method (called just before the
96 * probe method if the device has a device tree node.
98 * All three of platdata, priv and uclass_priv can be allocated by the
99 * driver, or you can use the auto_alloc_size members of struct driver and
100 * struct uclass_driver to have driver model do this automatically.
102 * @driver: The driver used by this device
103 * @name: Name of device, typically the FDT node name
104 * @platdata: Configuration data for this device
105 * @parent_platdata: The parent bus's configuration data for this device
106 * @uclass_platdata: The uclass's configuration data for this device
107 * @node: Reference to device tree node for this device
108 * @driver_data: Driver data word for the entry that matched this device with
110 * @parent: Parent of this device, or NULL for the top level device
111 * @priv: Private data for this device
112 * @uclass: Pointer to uclass for this device
113 * @uclass_priv: The uclass's private data for this device
114 * @parent_priv: The parent's private data for this device
115 * @uclass_node: Used by uclass to link its devices
116 * @child_head: List of children of this device
117 * @sibling_node: Next device in list of all devices
118 * @flags: Flags for this device DM_FLAG_...
119 * @req_seq: Requested sequence number for this device (-1 = any)
120 * @seq: Allocated sequence number for this device (-1 = none). This is set up
121 * when the device is probed and will be unique within the device's uclass.
122 * @devres_head: List of memory allocations associated with this device.
123 * When CONFIG_DEVRES is enabled, devm_kmalloc() and friends will
124 * add to this list. Memory so-allocated will be freed
125 * automatically when the device is removed / unbound
128 const struct driver *driver;
131 void *parent_platdata;
132 void *uclass_platdata;
135 struct udevice *parent;
137 struct uclass *uclass;
140 struct list_head uclass_node;
141 struct list_head child_head;
142 struct list_head sibling_node;
147 struct list_head devres_head;
151 /* Maximum sequence number supported */
152 #define DM_MAX_SEQ 999
154 /* Returns the operations for a device */
155 #define device_get_ops(dev) (dev->driver->ops)
157 /* Returns non-zero if the device is active (probed and not removed) */
158 #define device_active(dev) ((dev)->flags & DM_FLAG_ACTIVATED)
160 static inline int dev_of_offset(const struct udevice *dev)
162 return ofnode_to_offset(dev->node);
165 static inline void dev_set_of_offset(struct udevice *dev, int of_offset)
167 dev->node = offset_to_ofnode(of_offset);
170 static inline bool dev_has_of_node(struct udevice *dev)
172 return ofnode_valid(dev->node);
176 * struct udevice_id - Lists the compatible strings supported by a driver
177 * @compatible: Compatible string
178 * @data: Data for this compatible string
181 const char *compatible;
185 #if CONFIG_IS_ENABLED(OF_CONTROL)
186 #define of_match_ptr(_ptr) (_ptr)
188 #define of_match_ptr(_ptr) NULL
189 #endif /* CONFIG_IS_ENABLED(OF_CONTROL) */
192 * struct driver - A driver for a feature or peripheral
194 * This holds methods for setting up a new device, and also removing it.
195 * The device needs information to set itself up - this is provided either
196 * by platdata or a device tree node (which we find by looking up
197 * matching compatible strings with of_match).
199 * Drivers all belong to a uclass, representing a class of devices of the
200 * same type. Common elements of the drivers can be implemented in the uclass,
201 * or the uclass can provide a consistent interface to the drivers within
205 * @id: Identifies the uclass we belong to
206 * @of_match: List of compatible strings to match, and any identifying data
208 * @bind: Called to bind a device to its driver
209 * @probe: Called to probe a device, i.e. activate it
210 * @remove: Called to remove a device, i.e. de-activate it
211 * @unbind: Called to unbind a device from its driver
212 * @ofdata_to_platdata: Called before probe to decode device tree data
213 * @child_post_bind: Called after a new child has been bound
214 * @child_pre_probe: Called before a child device is probed. The device has
215 * memory allocated but it has not yet been probed.
216 * @child_post_remove: Called after a child device is removed. The device
217 * has memory allocated but its device_remove() method has been called.
218 * @priv_auto_alloc_size: If non-zero this is the size of the private data
219 * to be allocated in the device's ->priv pointer. If zero, then the driver
220 * is responsible for allocating any data required.
221 * @platdata_auto_alloc_size: If non-zero this is the size of the
222 * platform data to be allocated in the device's ->platdata pointer.
223 * This is typically only useful for device-tree-aware drivers (those with
224 * an of_match), since drivers which use platdata will have the data
225 * provided in the U_BOOT_DEVICE() instantiation.
226 * @per_child_auto_alloc_size: Each device can hold private data owned by
227 * its parent. If required this will be automatically allocated if this
229 * @per_child_platdata_auto_alloc_size: A bus likes to store information about
230 * its children. If non-zero this is the size of this data, to be allocated
231 * in the child's parent_platdata pointer.
232 * @ops: Driver-specific operations. This is typically a list of function
233 * pointers defined by the driver, to implement driver functions required by
235 * @flags: driver flags - see DM_FLAGS_...
240 const struct udevice_id *of_match;
241 int (*bind)(struct udevice *dev);
242 int (*probe)(struct udevice *dev);
243 int (*remove)(struct udevice *dev);
244 int (*unbind)(struct udevice *dev);
245 int (*ofdata_to_platdata)(struct udevice *dev);
246 int (*child_post_bind)(struct udevice *dev);
247 int (*child_pre_probe)(struct udevice *dev);
248 int (*child_post_remove)(struct udevice *dev);
249 int priv_auto_alloc_size;
250 int platdata_auto_alloc_size;
251 int per_child_auto_alloc_size;
252 int per_child_platdata_auto_alloc_size;
253 const void *ops; /* driver-specific operations */
257 /* Declare a new U-Boot driver */
258 #define U_BOOT_DRIVER(__name) \
259 ll_entry_declare(struct driver, __name, driver)
261 /* Get a pointer to a given driver */
262 #define DM_GET_DRIVER(__name) \
263 ll_entry_get(struct driver, __name, driver)
266 * dev_get_platdata() - Get the platform data for a device
268 * This checks that dev is not NULL, but no other checks for now
270 * @dev Device to check
271 * @return platform data, or NULL if none
273 void *dev_get_platdata(const struct udevice *dev);
276 * dev_get_parent_platdata() - Get the parent platform data for a device
278 * This checks that dev is not NULL, but no other checks for now
280 * @dev Device to check
281 * @return parent's platform data, or NULL if none
283 void *dev_get_parent_platdata(const struct udevice *dev);
286 * dev_get_uclass_platdata() - Get the uclass platform data for a device
288 * This checks that dev is not NULL, but no other checks for now
290 * @dev Device to check
291 * @return uclass's platform data, or NULL if none
293 void *dev_get_uclass_platdata(const struct udevice *dev);
296 * dev_get_priv() - Get the private data for a device
298 * This checks that dev is not NULL, but no other checks for now
300 * @dev Device to check
301 * @return private data, or NULL if none
303 void *dev_get_priv(const struct udevice *dev);
306 * dev_get_parent_priv() - Get the parent private data for a device
308 * The parent private data is data stored in the device but owned by the
309 * parent. For example, a USB device may have parent data which contains
310 * information about how to talk to the device over USB.
312 * This checks that dev is not NULL, but no other checks for now
314 * @dev Device to check
315 * @return parent data, or NULL if none
317 void *dev_get_parent_priv(const struct udevice *dev);
320 * dev_get_uclass_priv() - Get the private uclass data for a device
322 * This checks that dev is not NULL, but no other checks for now
324 * @dev Device to check
325 * @return private uclass data for this device, or NULL if none
327 void *dev_get_uclass_priv(const struct udevice *dev);
330 * struct dev_get_parent() - Get the parent of a device
332 * @child: Child to check
333 * @return parent of child, or NULL if this is the root device
335 struct udevice *dev_get_parent(const struct udevice *child);
338 * dev_get_driver_data() - get the driver data used to bind a device
340 * When a device is bound using a device tree node, it matches a
341 * particular compatible string in struct udevice_id. This function
342 * returns the associated data value for that compatible string. This is
343 * the 'data' field in struct udevice_id.
345 * As an example, consider this structure:
346 * static const struct udevice_id tegra_i2c_ids[] = {
347 * { .compatible = "nvidia,tegra114-i2c", .data = TYPE_114 },
348 * { .compatible = "nvidia,tegra20-i2c", .data = TYPE_STD },
349 * { .compatible = "nvidia,tegra20-i2c-dvc", .data = TYPE_DVC },
353 * When driver model finds a driver for this it will store the 'data' value
354 * corresponding to the compatible string it matches. This function returns
355 * that value. This allows the driver to handle several variants of a device.
357 * For USB devices, this is the driver_info field in struct usb_device_id.
359 * @dev: Device to check
360 * @return driver data (0 if none is provided)
362 ulong dev_get_driver_data(const struct udevice *dev);
365 * dev_get_driver_ops() - get the device's driver's operations
367 * This checks that dev is not NULL, and returns the pointer to device's
368 * driver's operations.
370 * @dev: Device to check
371 * @return void pointer to driver's operations or NULL for NULL-dev or NULL-ops
373 const void *dev_get_driver_ops(const struct udevice *dev);
376 * device_get_uclass_id() - return the uclass ID of a device
378 * @dev: Device to check
379 * @return uclass ID for the device
381 enum uclass_id device_get_uclass_id(const struct udevice *dev);
384 * dev_get_uclass_name() - return the uclass name of a device
386 * This checks that dev is not NULL.
388 * @dev: Device to check
389 * @return pointer to the uclass name for the device
391 const char *dev_get_uclass_name(const struct udevice *dev);
394 * device_get_child() - Get the child of a device by index
396 * Returns the numbered child, 0 being the first. This does not use
397 * sequence numbers, only the natural order.
399 * @dev: Parent device to check
400 * @index: Child index
401 * @devp: Returns pointer to device
402 * @return 0 if OK, -ENODEV if no such device, other error if the device fails
405 int device_get_child(struct udevice *parent, int index, struct udevice **devp);
408 * device_find_child_by_seq() - Find a child device based on a sequence
410 * This searches for a device with the given seq or req_seq.
412 * For seq, if an active device has this sequence it will be returned.
413 * If there is no such device then this will return -ENODEV.
415 * For req_seq, if a device (whether activated or not) has this req_seq
416 * value, that device will be returned. This is a strong indication that
417 * the device will receive that sequence when activated.
419 * @parent: Parent device
420 * @seq_or_req_seq: Sequence number to find (0=first)
421 * @find_req_seq: true to find req_seq, false to find seq
422 * @devp: Returns pointer to device (there is only one per for each seq).
423 * Set to NULL if none is found
424 * @return 0 if OK, -ve on error
426 int device_find_child_by_seq(struct udevice *parent, int seq_or_req_seq,
427 bool find_req_seq, struct udevice **devp);
430 * device_get_child_by_seq() - Get a child device based on a sequence
432 * If an active device has this sequence it will be returned. If there is no
433 * such device then this will check for a device that is requesting this
436 * The device is probed to activate it ready for use.
438 * @parent: Parent device
439 * @seq: Sequence number to find (0=first)
440 * @devp: Returns pointer to device (there is only one per for each seq)
441 * Set to NULL if none is found
442 * @return 0 if OK, -ve on error
444 int device_get_child_by_seq(struct udevice *parent, int seq,
445 struct udevice **devp);
448 * device_find_child_by_of_offset() - Find a child device based on FDT offset
450 * Locates a child device by its device tree offset.
452 * @parent: Parent device
453 * @of_offset: Device tree offset to find
454 * @devp: Returns pointer to device if found, otherwise this is set to NULL
455 * @return 0 if OK, -ve on error
457 int device_find_child_by_of_offset(struct udevice *parent, int of_offset,
458 struct udevice **devp);
461 * device_get_child_by_of_offset() - Get a child device based on FDT offset
463 * Locates a child device by its device tree offset.
465 * The device is probed to activate it ready for use.
467 * @parent: Parent device
468 * @of_offset: Device tree offset to find
469 * @devp: Returns pointer to device if found, otherwise this is set to NULL
470 * @return 0 if OK, -ve on error
472 int device_get_child_by_of_offset(struct udevice *parent, int of_offset,
473 struct udevice **devp);
476 * device_find_global_by_ofnode() - Get a device based on ofnode
478 * Locates a device by its device tree ofnode, searching globally throughout
479 * the all driver model devices.
481 * The device is NOT probed
483 * @node: Device tree ofnode to find
484 * @devp: Returns pointer to device if found, otherwise this is set to NULL
485 * @return 0 if OK, -ve on error
488 int device_find_global_by_ofnode(ofnode node, struct udevice **devp);
491 * device_get_global_by_ofnode() - Get a device based on ofnode
493 * Locates a device by its device tree ofnode, searching globally throughout
494 * the all driver model devices.
496 * The device is probed to activate it ready for use.
498 * @node: Device tree ofnode to find
499 * @devp: Returns pointer to device if found, otherwise this is set to NULL
500 * @return 0 if OK, -ve on error
502 int device_get_global_by_ofnode(ofnode node, struct udevice **devp);
505 * device_find_first_child() - Find the first child of a device
507 * @parent: Parent device to search
508 * @devp: Returns first child device, or NULL if none
511 int device_find_first_child(struct udevice *parent, struct udevice **devp);
514 * device_find_next_child() - Find the next child of a device
516 * @devp: Pointer to previous child device on entry. Returns pointer to next
517 * child device, or NULL if none
520 int device_find_next_child(struct udevice **devp);
523 * device_find_first_inactive_child() - Find the first inactive child
525 * This is used to locate an existing child of a device which is of a given
528 * The device is NOT probed
530 * @parent: Parent device to search
531 * @uclass_id: Uclass to look for
532 * @devp: Returns device found, if any
533 * @return 0 if found, else -ENODEV
535 int device_find_first_inactive_child(struct udevice *parent,
536 enum uclass_id uclass_id,
537 struct udevice **devp);
540 * device_find_first_child_by_uclass() - Find the first child of a device in uc
542 * @parent: Parent device to search
543 * @uclass_id: Uclass to look for
544 * @devp: Returns first child device in that uclass, if any
545 * @return 0 if found, else -ENODEV
547 int device_find_first_child_by_uclass(struct udevice *parent,
548 enum uclass_id uclass_id,
549 struct udevice **devp);
552 * device_find_child_by_name() - Find a child by device name
554 * @parent: Parent device to search
555 * @name: Name to look for
556 * @devp: Returns device found, if any
557 * @return 0 if found, else -ENODEV
559 int device_find_child_by_name(struct udevice *parent, const char *name,
560 struct udevice **devp);
563 * device_has_children() - check if a device has any children
565 * @dev: Device to check
566 * @return true if the device has one or more children
568 bool device_has_children(const struct udevice *dev);
571 * device_has_active_children() - check if a device has any active children
573 * @dev: Device to check
574 * @return true if the device has one or more children and at least one of
575 * them is active (probed).
577 bool device_has_active_children(struct udevice *dev);
580 * device_is_last_sibling() - check if a device is the last sibling
582 * This function can be useful for display purposes, when special action needs
583 * to be taken when displaying the last sibling. This can happen when a tree
584 * view of devices is being displayed.
586 * @dev: Device to check
587 * @return true if there are no more siblings after this one - i.e. is it
590 bool device_is_last_sibling(struct udevice *dev);
593 * device_set_name() - set the name of a device
595 * This must be called in the device's bind() method and no later. Normally
596 * this is unnecessary but for probed devices which don't get a useful name
597 * this function can be helpful.
599 * The name is allocated and will be freed automatically when the device is
602 * @dev: Device to update
603 * @name: New name (this string is allocated new memory and attached to
605 * @return 0 if OK, -ENOMEM if there is not enough memory to allocate the
608 int device_set_name(struct udevice *dev, const char *name);
611 * device_set_name_alloced() - note that a device name is allocated
613 * This sets the DM_FLAG_NAME_ALLOCED flag for the device, so that when it is
614 * unbound the name will be freed. This avoids memory leaks.
616 * @dev: Device to update
618 void device_set_name_alloced(struct udevice *dev);
621 * device_is_compatible() - check if the device is compatible with the compat
623 * This allows to check whether the device is comaptible with the compat.
625 * @dev: udevice pointer for which compatible needs to be verified.
626 * @compat: Compatible string which needs to verified in the given
628 * @return true if OK, false if the compatible is not found
630 bool device_is_compatible(struct udevice *dev, const char *compat);
633 * of_machine_is_compatible() - check if the machine is compatible with
636 * This allows to check whether the machine is comaptible with the compat.
638 * @compat: Compatible string which needs to verified
639 * @return true if OK, false if the compatible is not found
641 bool of_machine_is_compatible(const char *compat);
644 * dev_disable_by_path() - Disable a device given its device tree path
646 * @path: The device tree path identifying the device to be disabled
647 * @return 0 on success, -ve on error
649 int dev_disable_by_path(const char *path);
652 * dev_enable_by_path() - Enable a device given its device tree path
654 * @path: The device tree path identifying the device to be enabled
655 * @return 0 on success, -ve on error
657 int dev_enable_by_path(const char *path);
660 * device_is_on_pci_bus - Test if a device is on a PCI bus
662 * @dev: device to test
663 * @return: true if it is on a PCI bus, false otherwise
665 static inline bool device_is_on_pci_bus(struct udevice *dev)
667 return device_get_uclass_id(dev->parent) == UCLASS_PCI;
671 * device_foreach_child_safe() - iterate through child devices safely
673 * This allows the @pos child to be removed in the loop if required.
675 * @pos: struct udevice * for the current device
676 * @next: struct udevice * for the next device
677 * @parent: parent device to scan
679 #define device_foreach_child_safe(pos, next, parent) \
680 list_for_each_entry_safe(pos, next, &parent->child_head, sibling_node)
683 * device_foreach_child() - iterate through child devices
685 * @pos: struct udevice * for the current device
686 * @parent: parent device to scan
688 #define device_foreach_child(pos, parent) \
689 list_for_each_entry(pos, &parent->child_head, sibling_node)
692 * dm_scan_fdt_dev() - Bind child device in a the device tree
694 * This handles device which have sub-nodes in the device tree. It scans all
695 * sub-nodes and binds drivers for each node where a driver can be found.
697 * If this is called prior to relocation, only pre-relocation devices will be
698 * bound (those marked with u-boot,dm-pre-reloc in the device tree, or where
699 * the driver has the DM_FLAG_PRE_RELOC flag set). Otherwise, all devices will
702 * @dev: Device to scan
703 * @return 0 if OK, -ve on error
705 int dm_scan_fdt_dev(struct udevice *dev);
707 /* device resource management */
708 typedef void (*dr_release_t)(struct udevice *dev, void *res);
709 typedef int (*dr_match_t)(struct udevice *dev, void *res, void *match_data);
713 #ifdef CONFIG_DEBUG_DEVRES
714 void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp,
716 #define _devres_alloc(release, size, gfp) \
717 __devres_alloc(release, size, gfp, #release)
719 void *_devres_alloc(dr_release_t release, size_t size, gfp_t gfp);
723 * devres_alloc() - Allocate device resource data
724 * @release: Release function devres will be associated with
725 * @size: Allocation size
726 * @gfp: Allocation flags
728 * Allocate devres of @size bytes. The allocated area is associated
729 * with @release. The returned pointer can be passed to
730 * other devres_*() functions.
733 * Pointer to allocated devres on success, NULL on failure.
735 #define devres_alloc(release, size, gfp) \
736 _devres_alloc(release, size, gfp | __GFP_ZERO)
739 * devres_free() - Free device resource data
740 * @res: Pointer to devres data to free
742 * Free devres created with devres_alloc().
744 void devres_free(void *res);
747 * devres_add() - Register device resource
748 * @dev: Device to add resource to
749 * @res: Resource to register
751 * Register devres @res to @dev. @res should have been allocated
752 * using devres_alloc(). On driver detach, the associated release
753 * function will be invoked and devres will be freed automatically.
755 void devres_add(struct udevice *dev, void *res);
758 * devres_find() - Find device resource
759 * @dev: Device to lookup resource from
760 * @release: Look for resources associated with this release function
761 * @match: Match function (optional)
762 * @match_data: Data for the match function
764 * Find the latest devres of @dev which is associated with @release
765 * and for which @match returns 1. If @match is NULL, it's considered
768 * @return pointer to found devres, NULL if not found.
770 void *devres_find(struct udevice *dev, dr_release_t release,
771 dr_match_t match, void *match_data);
774 * devres_get() - Find devres, if non-existent, add one atomically
775 * @dev: Device to lookup or add devres for
776 * @new_res: Pointer to new initialized devres to add if not found
777 * @match: Match function (optional)
778 * @match_data: Data for the match function
780 * Find the latest devres of @dev which has the same release function
781 * as @new_res and for which @match return 1. If found, @new_res is
782 * freed; otherwise, @new_res is added atomically.
784 * @return ointer to found or added devres.
786 void *devres_get(struct udevice *dev, void *new_res,
787 dr_match_t match, void *match_data);
790 * devres_remove() - Find a device resource and remove it
791 * @dev: Device to find resource from
792 * @release: Look for resources associated with this release function
793 * @match: Match function (optional)
794 * @match_data: Data for the match function
796 * Find the latest devres of @dev associated with @release and for
797 * which @match returns 1. If @match is NULL, it's considered to
798 * match all. If found, the resource is removed atomically and
801 * @return ointer to removed devres on success, NULL if not found.
803 void *devres_remove(struct udevice *dev, dr_release_t release,
804 dr_match_t match, void *match_data);
807 * devres_destroy() - Find a device resource and destroy it
808 * @dev: Device to find resource from
809 * @release: Look for resources associated with this release function
810 * @match: Match function (optional)
811 * @match_data: Data for the match function
813 * Find the latest devres of @dev associated with @release and for
814 * which @match returns 1. If @match is NULL, it's considered to
815 * match all. If found, the resource is removed atomically and freed.
817 * Note that the release function for the resource will not be called,
818 * only the devres-allocated data will be freed. The caller becomes
819 * responsible for freeing any other data.
821 * @return 0 if devres is found and freed, -ENOENT if not found.
823 int devres_destroy(struct udevice *dev, dr_release_t release,
824 dr_match_t match, void *match_data);
827 * devres_release() - Find a device resource and destroy it, calling release
828 * @dev: Device to find resource from
829 * @release: Look for resources associated with this release function
830 * @match: Match function (optional)
831 * @match_data: Data for the match function
833 * Find the latest devres of @dev associated with @release and for
834 * which @match returns 1. If @match is NULL, it's considered to
835 * match all. If found, the resource is removed atomically, the
836 * release function called and the resource freed.
838 * @return 0 if devres is found and freed, -ENOENT if not found.
840 int devres_release(struct udevice *dev, dr_release_t release,
841 dr_match_t match, void *match_data);
843 /* managed devm_k.alloc/kfree for device drivers */
845 * devm_kmalloc() - Resource-managed kmalloc
846 * @dev: Device to allocate memory for
847 * @size: Allocation size
848 * @gfp: Allocation gfp flags
850 * Managed kmalloc. Memory allocated with this function is
851 * automatically freed on driver detach. Like all other devres
852 * resources, guaranteed alignment is unsigned long long.
854 * @return pointer to allocated memory on success, NULL on failure.
856 void *devm_kmalloc(struct udevice *dev, size_t size, gfp_t gfp);
857 static inline void *devm_kzalloc(struct udevice *dev, size_t size, gfp_t gfp)
859 return devm_kmalloc(dev, size, gfp | __GFP_ZERO);
861 static inline void *devm_kmalloc_array(struct udevice *dev,
862 size_t n, size_t size, gfp_t flags)
864 if (size != 0 && n > SIZE_MAX / size)
866 return devm_kmalloc(dev, n * size, flags);
868 static inline void *devm_kcalloc(struct udevice *dev,
869 size_t n, size_t size, gfp_t flags)
871 return devm_kmalloc_array(dev, n, size, flags | __GFP_ZERO);
875 * devm_kfree() - Resource-managed kfree
876 * @dev: Device this memory belongs to
877 * @ptr: Memory to free
879 * Free memory allocated with devm_kmalloc().
881 void devm_kfree(struct udevice *dev, void *ptr);
883 #else /* ! CONFIG_DEVRES */
885 static inline void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp)
887 return kzalloc(size, gfp);
890 static inline void devres_free(void *res)
895 static inline void devres_add(struct udevice *dev, void *res)
899 static inline void *devres_find(struct udevice *dev, dr_release_t release,
900 dr_match_t match, void *match_data)
905 static inline void *devres_get(struct udevice *dev, void *new_res,
906 dr_match_t match, void *match_data)
911 static inline void *devres_remove(struct udevice *dev, dr_release_t release,
912 dr_match_t match, void *match_data)
917 static inline int devres_destroy(struct udevice *dev, dr_release_t release,
918 dr_match_t match, void *match_data)
923 static inline int devres_release(struct udevice *dev, dr_release_t release,
924 dr_match_t match, void *match_data)
929 static inline void *devm_kmalloc(struct udevice *dev, size_t size, gfp_t gfp)
931 return kmalloc(size, gfp);
934 static inline void *devm_kzalloc(struct udevice *dev, size_t size, gfp_t gfp)
936 return kzalloc(size, gfp);
939 static inline void *devm_kmaloc_array(struct udevice *dev,
940 size_t n, size_t size, gfp_t flags)
942 /* TODO: add kmalloc_array() to linux/compat.h */
943 if (size != 0 && n > SIZE_MAX / size)
945 return kmalloc(n * size, flags);
948 static inline void *devm_kcalloc(struct udevice *dev,
949 size_t n, size_t size, gfp_t flags)
951 /* TODO: add kcalloc() to linux/compat.h */
952 return kmalloc(n * size, flags | __GFP_ZERO);
955 static inline void devm_kfree(struct udevice *dev, void *ptr)
960 #endif /* ! CONFIG_DEVRES */
964 * remove the following after resolving conflicts with <linux/compat.h>
984 * print device name like Linux
986 #define dev_printk(dev, fmt, ...) \
988 printk(fmt, ##__VA_ARGS__); \
991 #define __dev_printk(level, dev, fmt, ...) \
993 if (level < CONFIG_VAL(LOGLEVEL)) \
994 dev_printk(dev, fmt, ##__VA_ARGS__); \
997 #define dev_emerg(dev, fmt, ...) \
998 __dev_printk(0, dev, fmt, ##__VA_ARGS__)
999 #define dev_alert(dev, fmt, ...) \
1000 __dev_printk(1, dev, fmt, ##__VA_ARGS__)
1001 #define dev_crit(dev, fmt, ...) \
1002 __dev_printk(2, dev, fmt, ##__VA_ARGS__)
1003 #define dev_err(dev, fmt, ...) \
1004 __dev_printk(3, dev, fmt, ##__VA_ARGS__)
1005 #define dev_warn(dev, fmt, ...) \
1006 __dev_printk(4, dev, fmt, ##__VA_ARGS__)
1007 #define dev_notice(dev, fmt, ...) \
1008 __dev_printk(5, dev, fmt, ##__VA_ARGS__)
1009 #define dev_info(dev, fmt, ...) \
1010 __dev_printk(6, dev, fmt, ##__VA_ARGS__)
1013 #define dev_dbg(dev, fmt, ...) \
1014 __dev_printk(7, dev, fmt, ##__VA_ARGS__)
1016 #define dev_dbg(dev, fmt, ...) \
1019 __dev_printk(7, dev, fmt, ##__VA_ARGS__); \
1023 #ifdef VERBOSE_DEBUG
1024 #define dev_vdbg dev_dbg
1026 #define dev_vdbg(dev, fmt, ...) \
1029 __dev_printk(7, dev, fmt, ##__VA_ARGS__); \