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 /* Device has platform data provided by of-platdata */
49 #define DM_FLAG_OF_PLATDATA (1 << 8)
52 * Call driver remove function to stop currently active DMA transfers or
53 * give DMA buffers back to the HW / controller. This may be needed for
54 * some drivers to do some final stage cleanup before the OS is called
57 #define DM_FLAG_ACTIVE_DMA (1 << 9)
60 * Call driver remove function to do some final configuration, before
61 * U-Boot exits and the OS is started
63 #define DM_FLAG_OS_PREPARE (1 << 10)
65 /* DM does not enable/disable the power domains corresponding to this device */
66 #define DM_FLAG_DEFAULT_PD_CTRL_OFF (1 << 11)
68 /* Driver platdata has been read. Cleared when the device is removed */
69 #define DM_FLAG_PLATDATA_VALID (1 << 12)
72 * One or multiple of these flags are passed to device_remove() so that
73 * a selective device removal as specified by the remove-stage and the
74 * driver flags can be done.
77 /* Normal remove, remove all devices */
78 DM_REMOVE_NORMAL = 1 << 0,
80 /* Remove devices with active DMA */
81 DM_REMOVE_ACTIVE_DMA = DM_FLAG_ACTIVE_DMA,
83 /* Remove devices which need some final OS preparation steps */
84 DM_REMOVE_OS_PREPARE = DM_FLAG_OS_PREPARE,
86 /* Add more use cases here */
88 /* Remove devices with any active flag */
89 DM_REMOVE_ACTIVE_ALL = DM_REMOVE_ACTIVE_DMA | DM_REMOVE_OS_PREPARE,
93 * struct udevice - An instance of a driver
95 * This holds information about a device, which is a driver bound to a
96 * particular port or peripheral (essentially a driver instance).
98 * A device will come into existence through a 'bind' call, either due to
99 * a U_BOOT_DEVICE() macro (in which case platdata is non-NULL) or a node
100 * in the device tree (in which case of_offset is >= 0). In the latter case
101 * we translate the device tree information into platdata in a function
102 * implemented by the driver ofdata_to_platdata method (called just before the
103 * probe method if the device has a device tree node.
105 * All three of platdata, priv and uclass_priv can be allocated by the
106 * driver, or you can use the auto_alloc_size members of struct driver and
107 * struct uclass_driver to have driver model do this automatically.
109 * @driver: The driver used by this device
110 * @name: Name of device, typically the FDT node name
111 * @platdata: Configuration data for this device
112 * @parent_platdata: The parent bus's configuration data for this device
113 * @uclass_platdata: The uclass's configuration data for this device
114 * @node: Reference to device tree node for this device
115 * @driver_data: Driver data word for the entry that matched this device with
117 * @parent: Parent of this device, or NULL for the top level device
118 * @priv: Private data for this device
119 * @uclass: Pointer to uclass for this device
120 * @uclass_priv: The uclass's private data for this device
121 * @parent_priv: The parent's private data for this device
122 * @uclass_node: Used by uclass to link its devices
123 * @child_head: List of children of this device
124 * @sibling_node: Next device in list of all devices
125 * @flags: Flags for this device DM_FLAG_...
126 * @req_seq: Requested sequence number for this device (-1 = any)
127 * @seq: Allocated sequence number for this device (-1 = none). This is set up
128 * when the device is probed and will be unique within the device's uclass.
129 * @devres_head: List of memory allocations associated with this device.
130 * When CONFIG_DEVRES is enabled, devm_kmalloc() and friends will
131 * add to this list. Memory so-allocated will be freed
132 * automatically when the device is removed / unbound
135 const struct driver *driver;
138 void *parent_platdata;
139 void *uclass_platdata;
142 struct udevice *parent;
144 struct uclass *uclass;
147 struct list_head uclass_node;
148 struct list_head child_head;
149 struct list_head sibling_node;
154 struct list_head devres_head;
158 /* Maximum sequence number supported */
159 #define DM_MAX_SEQ 999
161 /* Returns the operations for a device */
162 #define device_get_ops(dev) (dev->driver->ops)
164 /* Returns non-zero if the device is active (probed and not removed) */
165 #define device_active(dev) ((dev)->flags & DM_FLAG_ACTIVATED)
167 static inline int dev_of_offset(const struct udevice *dev)
169 return ofnode_to_offset(dev->node);
172 static inline void dev_set_of_offset(struct udevice *dev, int of_offset)
174 dev->node = offset_to_ofnode(of_offset);
177 static inline bool dev_has_of_node(struct udevice *dev)
179 return ofnode_valid(dev->node);
183 * struct udevice_id - Lists the compatible strings supported by a driver
184 * @compatible: Compatible string
185 * @data: Data for this compatible string
188 const char *compatible;
192 #if CONFIG_IS_ENABLED(OF_CONTROL)
193 #define of_match_ptr(_ptr) (_ptr)
195 #define of_match_ptr(_ptr) NULL
196 #endif /* CONFIG_IS_ENABLED(OF_CONTROL) */
199 * struct driver - A driver for a feature or peripheral
201 * This holds methods for setting up a new device, and also removing it.
202 * The device needs information to set itself up - this is provided either
203 * by platdata or a device tree node (which we find by looking up
204 * matching compatible strings with of_match).
206 * Drivers all belong to a uclass, representing a class of devices of the
207 * same type. Common elements of the drivers can be implemented in the uclass,
208 * or the uclass can provide a consistent interface to the drivers within
212 * @id: Identifies the uclass we belong to
213 * @of_match: List of compatible strings to match, and any identifying data
215 * @bind: Called to bind a device to its driver
216 * @probe: Called to probe a device, i.e. activate it
217 * @remove: Called to remove a device, i.e. de-activate it
218 * @unbind: Called to unbind a device from its driver
219 * @ofdata_to_platdata: Called before probe to decode device tree data
220 * @child_post_bind: Called after a new child has been bound
221 * @child_pre_probe: Called before a child device is probed. The device has
222 * memory allocated but it has not yet been probed.
223 * @child_post_remove: Called after a child device is removed. The device
224 * has memory allocated but its device_remove() method has been called.
225 * @priv_auto_alloc_size: If non-zero this is the size of the private data
226 * to be allocated in the device's ->priv pointer. If zero, then the driver
227 * is responsible for allocating any data required.
228 * @platdata_auto_alloc_size: If non-zero this is the size of the
229 * platform data to be allocated in the device's ->platdata pointer.
230 * This is typically only useful for device-tree-aware drivers (those with
231 * an of_match), since drivers which use platdata will have the data
232 * provided in the U_BOOT_DEVICE() instantiation.
233 * @per_child_auto_alloc_size: Each device can hold private data owned by
234 * its parent. If required this will be automatically allocated if this
236 * @per_child_platdata_auto_alloc_size: A bus likes to store information about
237 * its children. If non-zero this is the size of this data, to be allocated
238 * in the child's parent_platdata pointer.
239 * @ops: Driver-specific operations. This is typically a list of function
240 * pointers defined by the driver, to implement driver functions required by
242 * @flags: driver flags - see DM_FLAGS_...
247 const struct udevice_id *of_match;
248 int (*bind)(struct udevice *dev);
249 int (*probe)(struct udevice *dev);
250 int (*remove)(struct udevice *dev);
251 int (*unbind)(struct udevice *dev);
252 int (*ofdata_to_platdata)(struct udevice *dev);
253 int (*child_post_bind)(struct udevice *dev);
254 int (*child_pre_probe)(struct udevice *dev);
255 int (*child_post_remove)(struct udevice *dev);
256 int priv_auto_alloc_size;
257 int platdata_auto_alloc_size;
258 int per_child_auto_alloc_size;
259 int per_child_platdata_auto_alloc_size;
260 const void *ops; /* driver-specific operations */
264 /* Declare a new U-Boot driver */
265 #define U_BOOT_DRIVER(__name) \
266 ll_entry_declare(struct driver, __name, driver)
268 /* Get a pointer to a given driver */
269 #define DM_GET_DRIVER(__name) \
270 ll_entry_get(struct driver, __name, driver)
273 * dev_get_platdata() - Get the platform data for a device
275 * This checks that dev is not NULL, but no other checks for now
277 * @dev Device to check
278 * @return platform data, or NULL if none
280 void *dev_get_platdata(const struct udevice *dev);
283 * dev_get_parent_platdata() - Get the parent platform data for a device
285 * This checks that dev is not NULL, but no other checks for now
287 * @dev Device to check
288 * @return parent's platform data, or NULL if none
290 void *dev_get_parent_platdata(const struct udevice *dev);
293 * dev_get_uclass_platdata() - Get the uclass platform data for a device
295 * This checks that dev is not NULL, but no other checks for now
297 * @dev Device to check
298 * @return uclass's platform data, or NULL if none
300 void *dev_get_uclass_platdata(const struct udevice *dev);
303 * dev_get_priv() - Get the private data for a device
305 * This checks that dev is not NULL, but no other checks for now
307 * @dev Device to check
308 * @return private data, or NULL if none
310 void *dev_get_priv(const struct udevice *dev);
313 * dev_get_parent_priv() - Get the parent private data for a device
315 * The parent private data is data stored in the device but owned by the
316 * parent. For example, a USB device may have parent data which contains
317 * information about how to talk to the device over USB.
319 * This checks that dev is not NULL, but no other checks for now
321 * @dev Device to check
322 * @return parent data, or NULL if none
324 void *dev_get_parent_priv(const struct udevice *dev);
327 * dev_get_uclass_priv() - Get the private uclass data for a device
329 * This checks that dev is not NULL, but no other checks for now
331 * @dev Device to check
332 * @return private uclass data for this device, or NULL if none
334 void *dev_get_uclass_priv(const struct udevice *dev);
337 * struct dev_get_parent() - Get the parent of a device
339 * @child: Child to check
340 * @return parent of child, or NULL if this is the root device
342 struct udevice *dev_get_parent(const struct udevice *child);
345 * dev_get_driver_data() - get the driver data used to bind a device
347 * When a device is bound using a device tree node, it matches a
348 * particular compatible string in struct udevice_id. This function
349 * returns the associated data value for that compatible string. This is
350 * the 'data' field in struct udevice_id.
352 * As an example, consider this structure:
353 * static const struct udevice_id tegra_i2c_ids[] = {
354 * { .compatible = "nvidia,tegra114-i2c", .data = TYPE_114 },
355 * { .compatible = "nvidia,tegra20-i2c", .data = TYPE_STD },
356 * { .compatible = "nvidia,tegra20-i2c-dvc", .data = TYPE_DVC },
360 * When driver model finds a driver for this it will store the 'data' value
361 * corresponding to the compatible string it matches. This function returns
362 * that value. This allows the driver to handle several variants of a device.
364 * For USB devices, this is the driver_info field in struct usb_device_id.
366 * @dev: Device to check
367 * @return driver data (0 if none is provided)
369 ulong dev_get_driver_data(const struct udevice *dev);
372 * dev_get_driver_ops() - get the device's driver's operations
374 * This checks that dev is not NULL, and returns the pointer to device's
375 * driver's operations.
377 * @dev: Device to check
378 * @return void pointer to driver's operations or NULL for NULL-dev or NULL-ops
380 const void *dev_get_driver_ops(const struct udevice *dev);
383 * device_get_uclass_id() - return the uclass ID of a device
385 * @dev: Device to check
386 * @return uclass ID for the device
388 enum uclass_id device_get_uclass_id(const struct udevice *dev);
391 * dev_get_uclass_name() - return the uclass name of a device
393 * This checks that dev is not NULL.
395 * @dev: Device to check
396 * @return pointer to the uclass name for the device
398 const char *dev_get_uclass_name(const struct udevice *dev);
401 * device_get_child() - Get the child of a device by index
403 * Returns the numbered child, 0 being the first. This does not use
404 * sequence numbers, only the natural order.
406 * @dev: Parent device to check
407 * @index: Child index
408 * @devp: Returns pointer to device
409 * @return 0 if OK, -ENODEV if no such device, other error if the device fails
412 int device_get_child(struct udevice *parent, int index, struct udevice **devp);
415 * device_get_child_count() - Get the available child count of a device
417 * Returns the number of children to a device.
419 * @parent: Parent device to check
421 int device_get_child_count(struct udevice *parent);
424 * device_find_child_by_seq() - Find a child device based on a sequence
426 * This searches for a device with the given seq or req_seq.
428 * For seq, if an active device has this sequence it will be returned.
429 * If there is no such device then this will return -ENODEV.
431 * For req_seq, if a device (whether activated or not) has this req_seq
432 * value, that device will be returned. This is a strong indication that
433 * the device will receive that sequence when activated.
435 * @parent: Parent device
436 * @seq_or_req_seq: Sequence number to find (0=first)
437 * @find_req_seq: true to find req_seq, false to find seq
438 * @devp: Returns pointer to device (there is only one per for each seq).
439 * Set to NULL if none is found
440 * @return 0 if OK, -ve on error
442 int device_find_child_by_seq(struct udevice *parent, int seq_or_req_seq,
443 bool find_req_seq, struct udevice **devp);
446 * device_get_child_by_seq() - Get a child device based on a sequence
448 * If an active device has this sequence it will be returned. If there is no
449 * such device then this will check for a device that is requesting this
452 * The device is probed to activate it ready for use.
454 * @parent: Parent device
455 * @seq: Sequence number to find (0=first)
456 * @devp: Returns pointer to device (there is only one per for each seq)
457 * Set to NULL if none is found
458 * @return 0 if OK, -ve on error
460 int device_get_child_by_seq(struct udevice *parent, int seq,
461 struct udevice **devp);
464 * device_find_child_by_of_offset() - Find a child device based on FDT offset
466 * Locates a child device by its device tree offset.
468 * @parent: Parent device
469 * @of_offset: Device tree offset to find
470 * @devp: Returns pointer to device if found, otherwise this is set to NULL
471 * @return 0 if OK, -ve on error
473 int device_find_child_by_of_offset(struct udevice *parent, int of_offset,
474 struct udevice **devp);
477 * device_get_child_by_of_offset() - Get a child device based on FDT offset
479 * Locates a child device by its device tree offset.
481 * The device is probed to activate it ready for use.
483 * @parent: Parent device
484 * @of_offset: Device tree offset to find
485 * @devp: Returns pointer to device if found, otherwise this is set to NULL
486 * @return 0 if OK, -ve on error
488 int device_get_child_by_of_offset(struct udevice *parent, int of_offset,
489 struct udevice **devp);
492 * device_find_global_by_ofnode() - Get a device based on ofnode
494 * Locates a device by its device tree ofnode, searching globally throughout
495 * the all driver model devices.
497 * The device is NOT probed
499 * @node: Device tree ofnode to find
500 * @devp: Returns pointer to device if found, otherwise this is set to NULL
501 * @return 0 if OK, -ve on error
504 int device_find_global_by_ofnode(ofnode node, struct udevice **devp);
507 * device_get_global_by_ofnode() - Get a device based on ofnode
509 * Locates a device by its device tree ofnode, searching globally throughout
510 * the all driver model devices.
512 * The device is probed to activate it ready for use.
514 * @node: Device tree ofnode to find
515 * @devp: Returns pointer to device if found, otherwise this is set to NULL
516 * @return 0 if OK, -ve on error
518 int device_get_global_by_ofnode(ofnode node, struct udevice **devp);
521 * device_find_first_child() - Find the first child of a device
523 * @parent: Parent device to search
524 * @devp: Returns first child device, or NULL if none
527 int device_find_first_child(struct udevice *parent, struct udevice **devp);
530 * device_find_next_child() - Find the next child of a device
532 * @devp: Pointer to previous child device on entry. Returns pointer to next
533 * child device, or NULL if none
536 int device_find_next_child(struct udevice **devp);
539 * device_find_first_inactive_child() - Find the first inactive child
541 * This is used to locate an existing child of a device which is of a given
544 * The device is NOT probed
546 * @parent: Parent device to search
547 * @uclass_id: Uclass to look for
548 * @devp: Returns device found, if any
549 * @return 0 if found, else -ENODEV
551 int device_find_first_inactive_child(struct udevice *parent,
552 enum uclass_id uclass_id,
553 struct udevice **devp);
556 * device_find_first_child_by_uclass() - Find the first child of a device in uc
558 * @parent: Parent device to search
559 * @uclass_id: Uclass to look for
560 * @devp: Returns first child device in that uclass, if any
561 * @return 0 if found, else -ENODEV
563 int device_find_first_child_by_uclass(struct udevice *parent,
564 enum uclass_id uclass_id,
565 struct udevice **devp);
568 * device_find_child_by_name() - Find a child by device name
570 * @parent: Parent device to search
571 * @name: Name to look for
572 * @devp: Returns device found, if any
573 * @return 0 if found, else -ENODEV
575 int device_find_child_by_name(struct udevice *parent, const char *name,
576 struct udevice **devp);
579 * device_has_children() - check if a device has any children
581 * @dev: Device to check
582 * @return true if the device has one or more children
584 bool device_has_children(const struct udevice *dev);
587 * device_has_active_children() - check if a device has any active children
589 * @dev: Device to check
590 * @return true if the device has one or more children and at least one of
591 * them is active (probed).
593 bool device_has_active_children(struct udevice *dev);
596 * device_is_last_sibling() - check if a device is the last sibling
598 * This function can be useful for display purposes, when special action needs
599 * to be taken when displaying the last sibling. This can happen when a tree
600 * view of devices is being displayed.
602 * @dev: Device to check
603 * @return true if there are no more siblings after this one - i.e. is it
606 bool device_is_last_sibling(struct udevice *dev);
609 * device_set_name() - set the name of a device
611 * This must be called in the device's bind() method and no later. Normally
612 * this is unnecessary but for probed devices which don't get a useful name
613 * this function can be helpful.
615 * The name is allocated and will be freed automatically when the device is
618 * @dev: Device to update
619 * @name: New name (this string is allocated new memory and attached to
621 * @return 0 if OK, -ENOMEM if there is not enough memory to allocate the
624 int device_set_name(struct udevice *dev, const char *name);
627 * device_set_name_alloced() - note that a device name is allocated
629 * This sets the DM_FLAG_NAME_ALLOCED flag for the device, so that when it is
630 * unbound the name will be freed. This avoids memory leaks.
632 * @dev: Device to update
634 void device_set_name_alloced(struct udevice *dev);
637 * device_is_compatible() - check if the device is compatible with the compat
639 * This allows to check whether the device is comaptible with the compat.
641 * @dev: udevice pointer for which compatible needs to be verified.
642 * @compat: Compatible string which needs to verified in the given
644 * @return true if OK, false if the compatible is not found
646 bool device_is_compatible(struct udevice *dev, const char *compat);
649 * of_machine_is_compatible() - check if the machine is compatible with
652 * This allows to check whether the machine is comaptible with the compat.
654 * @compat: Compatible string which needs to verified
655 * @return true if OK, false if the compatible is not found
657 bool of_machine_is_compatible(const char *compat);
660 * dev_disable_by_path() - Disable a device given its device tree path
662 * @path: The device tree path identifying the device to be disabled
663 * @return 0 on success, -ve on error
665 int dev_disable_by_path(const char *path);
668 * dev_enable_by_path() - Enable a device given its device tree path
670 * @path: The device tree path identifying the device to be enabled
671 * @return 0 on success, -ve on error
673 int dev_enable_by_path(const char *path);
676 * device_is_on_pci_bus - Test if a device is on a PCI bus
678 * @dev: device to test
679 * @return: true if it is on a PCI bus, false otherwise
681 static inline bool device_is_on_pci_bus(struct udevice *dev)
683 return device_get_uclass_id(dev->parent) == UCLASS_PCI;
687 * device_foreach_child_safe() - iterate through child devices safely
689 * This allows the @pos child to be removed in the loop if required.
691 * @pos: struct udevice * for the current device
692 * @next: struct udevice * for the next device
693 * @parent: parent device to scan
695 #define device_foreach_child_safe(pos, next, parent) \
696 list_for_each_entry_safe(pos, next, &parent->child_head, sibling_node)
699 * device_foreach_child() - iterate through child devices
701 * @pos: struct udevice * for the current device
702 * @parent: parent device to scan
704 #define device_foreach_child(pos, parent) \
705 list_for_each_entry(pos, &parent->child_head, sibling_node)
708 * dm_scan_fdt_dev() - Bind child device in a the device tree
710 * This handles device which have sub-nodes in the device tree. It scans all
711 * sub-nodes and binds drivers for each node where a driver can be found.
713 * If this is called prior to relocation, only pre-relocation devices will be
714 * bound (those marked with u-boot,dm-pre-reloc in the device tree, or where
715 * the driver has the DM_FLAG_PRE_RELOC flag set). Otherwise, all devices will
718 * @dev: Device to scan
719 * @return 0 if OK, -ve on error
721 int dm_scan_fdt_dev(struct udevice *dev);
723 /* device resource management */
724 typedef void (*dr_release_t)(struct udevice *dev, void *res);
725 typedef int (*dr_match_t)(struct udevice *dev, void *res, void *match_data);
729 #ifdef CONFIG_DEBUG_DEVRES
730 void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp,
732 #define _devres_alloc(release, size, gfp) \
733 __devres_alloc(release, size, gfp, #release)
735 void *_devres_alloc(dr_release_t release, size_t size, gfp_t gfp);
739 * devres_alloc() - Allocate device resource data
740 * @release: Release function devres will be associated with
741 * @size: Allocation size
742 * @gfp: Allocation flags
744 * Allocate devres of @size bytes. The allocated area is associated
745 * with @release. The returned pointer can be passed to
746 * other devres_*() functions.
749 * Pointer to allocated devres on success, NULL on failure.
751 #define devres_alloc(release, size, gfp) \
752 _devres_alloc(release, size, gfp | __GFP_ZERO)
755 * devres_free() - Free device resource data
756 * @res: Pointer to devres data to free
758 * Free devres created with devres_alloc().
760 void devres_free(void *res);
763 * devres_add() - Register device resource
764 * @dev: Device to add resource to
765 * @res: Resource to register
767 * Register devres @res to @dev. @res should have been allocated
768 * using devres_alloc(). On driver detach, the associated release
769 * function will be invoked and devres will be freed automatically.
771 void devres_add(struct udevice *dev, void *res);
774 * devres_find() - Find device resource
775 * @dev: Device to lookup resource from
776 * @release: Look for resources associated with this release function
777 * @match: Match function (optional)
778 * @match_data: Data for the match function
780 * Find the latest devres of @dev which is associated with @release
781 * and for which @match returns 1. If @match is NULL, it's considered
784 * @return pointer to found devres, NULL if not found.
786 void *devres_find(struct udevice *dev, dr_release_t release,
787 dr_match_t match, void *match_data);
790 * devres_get() - Find devres, if non-existent, add one atomically
791 * @dev: Device to lookup or add devres for
792 * @new_res: Pointer to new initialized devres to add if not found
793 * @match: Match function (optional)
794 * @match_data: Data for the match function
796 * Find the latest devres of @dev which has the same release function
797 * as @new_res and for which @match return 1. If found, @new_res is
798 * freed; otherwise, @new_res is added atomically.
800 * @return ointer to found or added devres.
802 void *devres_get(struct udevice *dev, void *new_res,
803 dr_match_t match, void *match_data);
806 * devres_remove() - Find a device resource and remove it
807 * @dev: Device to find resource from
808 * @release: Look for resources associated with this release function
809 * @match: Match function (optional)
810 * @match_data: Data for the match function
812 * Find the latest devres of @dev associated with @release and for
813 * which @match returns 1. If @match is NULL, it's considered to
814 * match all. If found, the resource is removed atomically and
817 * @return ointer to removed devres on success, NULL if not found.
819 void *devres_remove(struct udevice *dev, dr_release_t release,
820 dr_match_t match, void *match_data);
823 * devres_destroy() - Find a device resource and destroy it
824 * @dev: Device to find resource from
825 * @release: Look for resources associated with this release function
826 * @match: Match function (optional)
827 * @match_data: Data for the match function
829 * Find the latest devres of @dev associated with @release and for
830 * which @match returns 1. If @match is NULL, it's considered to
831 * match all. If found, the resource is removed atomically and freed.
833 * Note that the release function for the resource will not be called,
834 * only the devres-allocated data will be freed. The caller becomes
835 * responsible for freeing any other data.
837 * @return 0 if devres is found and freed, -ENOENT if not found.
839 int devres_destroy(struct udevice *dev, dr_release_t release,
840 dr_match_t match, void *match_data);
843 * devres_release() - Find a device resource and destroy it, calling release
844 * @dev: Device to find resource from
845 * @release: Look for resources associated with this release function
846 * @match: Match function (optional)
847 * @match_data: Data for the match function
849 * Find the latest devres of @dev associated with @release and for
850 * which @match returns 1. If @match is NULL, it's considered to
851 * match all. If found, the resource is removed atomically, the
852 * release function called and the resource freed.
854 * @return 0 if devres is found and freed, -ENOENT if not found.
856 int devres_release(struct udevice *dev, dr_release_t release,
857 dr_match_t match, void *match_data);
859 /* managed devm_k.alloc/kfree for device drivers */
861 * devm_kmalloc() - Resource-managed kmalloc
862 * @dev: Device to allocate memory for
863 * @size: Allocation size
864 * @gfp: Allocation gfp flags
866 * Managed kmalloc. Memory allocated with this function is
867 * automatically freed on driver detach. Like all other devres
868 * resources, guaranteed alignment is unsigned long long.
870 * @return pointer to allocated memory on success, NULL on failure.
872 void *devm_kmalloc(struct udevice *dev, size_t size, gfp_t gfp);
873 static inline void *devm_kzalloc(struct udevice *dev, size_t size, gfp_t gfp)
875 return devm_kmalloc(dev, size, gfp | __GFP_ZERO);
877 static inline void *devm_kmalloc_array(struct udevice *dev,
878 size_t n, size_t size, gfp_t flags)
880 if (size != 0 && n > SIZE_MAX / size)
882 return devm_kmalloc(dev, n * size, flags);
884 static inline void *devm_kcalloc(struct udevice *dev,
885 size_t n, size_t size, gfp_t flags)
887 return devm_kmalloc_array(dev, n, size, flags | __GFP_ZERO);
891 * devm_kfree() - Resource-managed kfree
892 * @dev: Device this memory belongs to
893 * @ptr: Memory to free
895 * Free memory allocated with devm_kmalloc().
897 void devm_kfree(struct udevice *dev, void *ptr);
899 #else /* ! CONFIG_DEVRES */
901 static inline void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp)
903 return kzalloc(size, gfp);
906 static inline void devres_free(void *res)
911 static inline void devres_add(struct udevice *dev, void *res)
915 static inline void *devres_find(struct udevice *dev, dr_release_t release,
916 dr_match_t match, void *match_data)
921 static inline void *devres_get(struct udevice *dev, void *new_res,
922 dr_match_t match, void *match_data)
927 static inline void *devres_remove(struct udevice *dev, dr_release_t release,
928 dr_match_t match, void *match_data)
933 static inline int devres_destroy(struct udevice *dev, dr_release_t release,
934 dr_match_t match, void *match_data)
939 static inline int devres_release(struct udevice *dev, dr_release_t release,
940 dr_match_t match, void *match_data)
945 static inline void *devm_kmalloc(struct udevice *dev, size_t size, gfp_t gfp)
947 return kmalloc(size, gfp);
950 static inline void *devm_kzalloc(struct udevice *dev, size_t size, gfp_t gfp)
952 return kzalloc(size, gfp);
955 static inline void *devm_kmalloc_array(struct udevice *dev,
956 size_t n, size_t size, gfp_t flags)
958 /* TODO: add kmalloc_array() to linux/compat.h */
959 if (size != 0 && n > SIZE_MAX / size)
961 return kmalloc(n * size, flags);
964 static inline void *devm_kcalloc(struct udevice *dev,
965 size_t n, size_t size, gfp_t flags)
967 /* TODO: add kcalloc() to linux/compat.h */
968 return kmalloc(n * size, flags | __GFP_ZERO);
971 static inline void devm_kfree(struct udevice *dev, void *ptr)
976 #endif /* ! CONFIG_DEVRES */
980 * remove the following after resolving conflicts with <linux/compat.h>
1000 * print device name like Linux
1002 #define dev_printk(dev, fmt, ...) \
1004 printk(fmt, ##__VA_ARGS__); \
1007 #define __dev_printk(level, dev, fmt, ...) \
1009 if (level < CONFIG_VAL(LOGLEVEL)) \
1010 dev_printk(dev, fmt, ##__VA_ARGS__); \
1013 #define dev_emerg(dev, fmt, ...) \
1014 __dev_printk(0, dev, fmt, ##__VA_ARGS__)
1015 #define dev_alert(dev, fmt, ...) \
1016 __dev_printk(1, dev, fmt, ##__VA_ARGS__)
1017 #define dev_crit(dev, fmt, ...) \
1018 __dev_printk(2, dev, fmt, ##__VA_ARGS__)
1019 #define dev_err(dev, fmt, ...) \
1020 __dev_printk(3, dev, fmt, ##__VA_ARGS__)
1021 #define dev_warn(dev, fmt, ...) \
1022 __dev_printk(4, dev, fmt, ##__VA_ARGS__)
1023 #define dev_notice(dev, fmt, ...) \
1024 __dev_printk(5, dev, fmt, ##__VA_ARGS__)
1025 #define dev_info(dev, fmt, ...) \
1026 __dev_printk(6, dev, fmt, ##__VA_ARGS__)
1029 #define dev_dbg(dev, fmt, ...) \
1030 __dev_printk(7, dev, fmt, ##__VA_ARGS__)
1032 #define dev_dbg(dev, fmt, ...) \
1035 __dev_printk(7, dev, fmt, ##__VA_ARGS__); \
1039 #ifdef VERBOSE_DEBUG
1040 #define dev_vdbg dev_dbg
1042 #define dev_vdbg(dev, fmt, ...) \
1045 __dev_printk(7, dev, fmt, ##__VA_ARGS__); \