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)
69 * One or multiple of these flags are passed to device_remove() so that
70 * a selective device removal as specified by the remove-stage and the
71 * driver flags can be done.
74 /* Normal remove, remove all devices */
75 DM_REMOVE_NORMAL = 1 << 0,
77 /* Remove devices with active DMA */
78 DM_REMOVE_ACTIVE_DMA = DM_FLAG_ACTIVE_DMA,
80 /* Remove devices which need some final OS preparation steps */
81 DM_REMOVE_OS_PREPARE = DM_FLAG_OS_PREPARE,
83 /* Add more use cases here */
85 /* Remove devices with any active flag */
86 DM_REMOVE_ACTIVE_ALL = DM_REMOVE_ACTIVE_DMA | DM_REMOVE_OS_PREPARE,
90 * struct udevice - An instance of a driver
92 * This holds information about a device, which is a driver bound to a
93 * particular port or peripheral (essentially a driver instance).
95 * A device will come into existence through a 'bind' call, either due to
96 * a U_BOOT_DEVICE() macro (in which case platdata is non-NULL) or a node
97 * in the device tree (in which case of_offset is >= 0). In the latter case
98 * we translate the device tree information into platdata in a function
99 * implemented by the driver ofdata_to_platdata method (called just before the
100 * probe method if the device has a device tree node.
102 * All three of platdata, priv and uclass_priv can be allocated by the
103 * driver, or you can use the auto_alloc_size members of struct driver and
104 * struct uclass_driver to have driver model do this automatically.
106 * @driver: The driver used by this device
107 * @name: Name of device, typically the FDT node name
108 * @platdata: Configuration data for this device
109 * @parent_platdata: The parent bus's configuration data for this device
110 * @uclass_platdata: The uclass's configuration data for this device
111 * @node: Reference to device tree node for this device
112 * @driver_data: Driver data word for the entry that matched this device with
114 * @parent: Parent of this device, or NULL for the top level device
115 * @priv: Private data for this device
116 * @uclass: Pointer to uclass for this device
117 * @uclass_priv: The uclass's private data for this device
118 * @parent_priv: The parent's private data for this device
119 * @uclass_node: Used by uclass to link its devices
120 * @child_head: List of children of this device
121 * @sibling_node: Next device in list of all devices
122 * @flags: Flags for this device DM_FLAG_...
123 * @req_seq: Requested sequence number for this device (-1 = any)
124 * @seq: Allocated sequence number for this device (-1 = none). This is set up
125 * when the device is probed and will be unique within the device's uclass.
126 * @devres_head: List of memory allocations associated with this device.
127 * When CONFIG_DEVRES is enabled, devm_kmalloc() and friends will
128 * add to this list. Memory so-allocated will be freed
129 * automatically when the device is removed / unbound
132 const struct driver *driver;
135 void *parent_platdata;
136 void *uclass_platdata;
139 struct udevice *parent;
141 struct uclass *uclass;
144 struct list_head uclass_node;
145 struct list_head child_head;
146 struct list_head sibling_node;
151 struct list_head devres_head;
155 /* Maximum sequence number supported */
156 #define DM_MAX_SEQ 999
158 /* Returns the operations for a device */
159 #define device_get_ops(dev) (dev->driver->ops)
161 /* Returns non-zero if the device is active (probed and not removed) */
162 #define device_active(dev) ((dev)->flags & DM_FLAG_ACTIVATED)
164 static inline int dev_of_offset(const struct udevice *dev)
166 return ofnode_to_offset(dev->node);
169 static inline void dev_set_of_offset(struct udevice *dev, int of_offset)
171 dev->node = offset_to_ofnode(of_offset);
174 static inline bool dev_has_of_node(struct udevice *dev)
176 return ofnode_valid(dev->node);
180 * struct udevice_id - Lists the compatible strings supported by a driver
181 * @compatible: Compatible string
182 * @data: Data for this compatible string
185 const char *compatible;
189 #if CONFIG_IS_ENABLED(OF_CONTROL)
190 #define of_match_ptr(_ptr) (_ptr)
192 #define of_match_ptr(_ptr) NULL
193 #endif /* CONFIG_IS_ENABLED(OF_CONTROL) */
196 * struct driver - A driver for a feature or peripheral
198 * This holds methods for setting up a new device, and also removing it.
199 * The device needs information to set itself up - this is provided either
200 * by platdata or a device tree node (which we find by looking up
201 * matching compatible strings with of_match).
203 * Drivers all belong to a uclass, representing a class of devices of the
204 * same type. Common elements of the drivers can be implemented in the uclass,
205 * or the uclass can provide a consistent interface to the drivers within
209 * @id: Identifies the uclass we belong to
210 * @of_match: List of compatible strings to match, and any identifying data
212 * @bind: Called to bind a device to its driver
213 * @probe: Called to probe a device, i.e. activate it
214 * @remove: Called to remove a device, i.e. de-activate it
215 * @unbind: Called to unbind a device from its driver
216 * @ofdata_to_platdata: Called before probe to decode device tree data
217 * @child_post_bind: Called after a new child has been bound
218 * @child_pre_probe: Called before a child device is probed. The device has
219 * memory allocated but it has not yet been probed.
220 * @child_post_remove: Called after a child device is removed. The device
221 * has memory allocated but its device_remove() method has been called.
222 * @priv_auto_alloc_size: If non-zero this is the size of the private data
223 * to be allocated in the device's ->priv pointer. If zero, then the driver
224 * is responsible for allocating any data required.
225 * @platdata_auto_alloc_size: If non-zero this is the size of the
226 * platform data to be allocated in the device's ->platdata pointer.
227 * This is typically only useful for device-tree-aware drivers (those with
228 * an of_match), since drivers which use platdata will have the data
229 * provided in the U_BOOT_DEVICE() instantiation.
230 * @per_child_auto_alloc_size: Each device can hold private data owned by
231 * its parent. If required this will be automatically allocated if this
233 * @per_child_platdata_auto_alloc_size: A bus likes to store information about
234 * its children. If non-zero this is the size of this data, to be allocated
235 * in the child's parent_platdata pointer.
236 * @ops: Driver-specific operations. This is typically a list of function
237 * pointers defined by the driver, to implement driver functions required by
239 * @flags: driver flags - see DM_FLAGS_...
244 const struct udevice_id *of_match;
245 int (*bind)(struct udevice *dev);
246 int (*probe)(struct udevice *dev);
247 int (*remove)(struct udevice *dev);
248 int (*unbind)(struct udevice *dev);
249 int (*ofdata_to_platdata)(struct udevice *dev);
250 int (*child_post_bind)(struct udevice *dev);
251 int (*child_pre_probe)(struct udevice *dev);
252 int (*child_post_remove)(struct udevice *dev);
253 int priv_auto_alloc_size;
254 int platdata_auto_alloc_size;
255 int per_child_auto_alloc_size;
256 int per_child_platdata_auto_alloc_size;
257 const void *ops; /* driver-specific operations */
261 /* Declare a new U-Boot driver */
262 #define U_BOOT_DRIVER(__name) \
263 ll_entry_declare(struct driver, __name, driver)
265 /* Get a pointer to a given driver */
266 #define DM_GET_DRIVER(__name) \
267 ll_entry_get(struct driver, __name, driver)
270 * dev_get_platdata() - Get the platform data for a device
272 * This checks that dev is not NULL, but no other checks for now
274 * @dev Device to check
275 * @return platform data, or NULL if none
277 void *dev_get_platdata(const struct udevice *dev);
280 * dev_get_parent_platdata() - Get the parent platform data for a device
282 * This checks that dev is not NULL, but no other checks for now
284 * @dev Device to check
285 * @return parent's platform data, or NULL if none
287 void *dev_get_parent_platdata(const struct udevice *dev);
290 * dev_get_uclass_platdata() - Get the uclass platform data for a device
292 * This checks that dev is not NULL, but no other checks for now
294 * @dev Device to check
295 * @return uclass's platform data, or NULL if none
297 void *dev_get_uclass_platdata(const struct udevice *dev);
300 * dev_get_priv() - Get the private data for a device
302 * This checks that dev is not NULL, but no other checks for now
304 * @dev Device to check
305 * @return private data, or NULL if none
307 void *dev_get_priv(const struct udevice *dev);
310 * dev_get_parent_priv() - Get the parent private data for a device
312 * The parent private data is data stored in the device but owned by the
313 * parent. For example, a USB device may have parent data which contains
314 * information about how to talk to the device over USB.
316 * This checks that dev is not NULL, but no other checks for now
318 * @dev Device to check
319 * @return parent data, or NULL if none
321 void *dev_get_parent_priv(const struct udevice *dev);
324 * dev_get_uclass_priv() - Get the private uclass data for a device
326 * This checks that dev is not NULL, but no other checks for now
328 * @dev Device to check
329 * @return private uclass data for this device, or NULL if none
331 void *dev_get_uclass_priv(const struct udevice *dev);
334 * struct dev_get_parent() - Get the parent of a device
336 * @child: Child to check
337 * @return parent of child, or NULL if this is the root device
339 struct udevice *dev_get_parent(const struct udevice *child);
342 * dev_get_driver_data() - get the driver data used to bind a device
344 * When a device is bound using a device tree node, it matches a
345 * particular compatible string in struct udevice_id. This function
346 * returns the associated data value for that compatible string. This is
347 * the 'data' field in struct udevice_id.
349 * As an example, consider this structure:
350 * static const struct udevice_id tegra_i2c_ids[] = {
351 * { .compatible = "nvidia,tegra114-i2c", .data = TYPE_114 },
352 * { .compatible = "nvidia,tegra20-i2c", .data = TYPE_STD },
353 * { .compatible = "nvidia,tegra20-i2c-dvc", .data = TYPE_DVC },
357 * When driver model finds a driver for this it will store the 'data' value
358 * corresponding to the compatible string it matches. This function returns
359 * that value. This allows the driver to handle several variants of a device.
361 * For USB devices, this is the driver_info field in struct usb_device_id.
363 * @dev: Device to check
364 * @return driver data (0 if none is provided)
366 ulong dev_get_driver_data(const struct udevice *dev);
369 * dev_get_driver_ops() - get the device's driver's operations
371 * This checks that dev is not NULL, and returns the pointer to device's
372 * driver's operations.
374 * @dev: Device to check
375 * @return void pointer to driver's operations or NULL for NULL-dev or NULL-ops
377 const void *dev_get_driver_ops(const struct udevice *dev);
380 * device_get_uclass_id() - return the uclass ID of a device
382 * @dev: Device to check
383 * @return uclass ID for the device
385 enum uclass_id device_get_uclass_id(const struct udevice *dev);
388 * dev_get_uclass_name() - return the uclass name of a device
390 * This checks that dev is not NULL.
392 * @dev: Device to check
393 * @return pointer to the uclass name for the device
395 const char *dev_get_uclass_name(const struct udevice *dev);
398 * device_get_child() - Get the child of a device by index
400 * Returns the numbered child, 0 being the first. This does not use
401 * sequence numbers, only the natural order.
403 * @dev: Parent device to check
404 * @index: Child index
405 * @devp: Returns pointer to device
406 * @return 0 if OK, -ENODEV if no such device, other error if the device fails
409 int device_get_child(struct udevice *parent, int index, struct udevice **devp);
412 * device_get_child_count() - Get the available child count of a device
414 * Returns the number of children to a device.
416 * @parent: Parent device to check
418 int device_get_child_count(struct udevice *parent);
421 * device_find_child_by_seq() - Find a child device based on a sequence
423 * This searches for a device with the given seq or req_seq.
425 * For seq, if an active device has this sequence it will be returned.
426 * If there is no such device then this will return -ENODEV.
428 * For req_seq, if a device (whether activated or not) has this req_seq
429 * value, that device will be returned. This is a strong indication that
430 * the device will receive that sequence when activated.
432 * @parent: Parent device
433 * @seq_or_req_seq: Sequence number to find (0=first)
434 * @find_req_seq: true to find req_seq, false to find seq
435 * @devp: Returns pointer to device (there is only one per for each seq).
436 * Set to NULL if none is found
437 * @return 0 if OK, -ve on error
439 int device_find_child_by_seq(struct udevice *parent, int seq_or_req_seq,
440 bool find_req_seq, struct udevice **devp);
443 * device_get_child_by_seq() - Get a child device based on a sequence
445 * If an active device has this sequence it will be returned. If there is no
446 * such device then this will check for a device that is requesting this
449 * The device is probed to activate it ready for use.
451 * @parent: Parent device
452 * @seq: Sequence number to find (0=first)
453 * @devp: Returns pointer to device (there is only one per for each seq)
454 * Set to NULL if none is found
455 * @return 0 if OK, -ve on error
457 int device_get_child_by_seq(struct udevice *parent, int seq,
458 struct udevice **devp);
461 * device_find_child_by_of_offset() - Find a child device based on FDT offset
463 * Locates a child device by its device tree offset.
465 * @parent: Parent device
466 * @of_offset: Device tree offset to find
467 * @devp: Returns pointer to device if found, otherwise this is set to NULL
468 * @return 0 if OK, -ve on error
470 int device_find_child_by_of_offset(struct udevice *parent, int of_offset,
471 struct udevice **devp);
474 * device_get_child_by_of_offset() - Get a child device based on FDT offset
476 * Locates a child device by its device tree offset.
478 * The device is probed to activate it ready for use.
480 * @parent: Parent device
481 * @of_offset: Device tree offset to find
482 * @devp: Returns pointer to device if found, otherwise this is set to NULL
483 * @return 0 if OK, -ve on error
485 int device_get_child_by_of_offset(struct udevice *parent, int of_offset,
486 struct udevice **devp);
489 * device_find_global_by_ofnode() - Get a device based on ofnode
491 * Locates a device by its device tree ofnode, searching globally throughout
492 * the all driver model devices.
494 * The device is NOT probed
496 * @node: Device tree ofnode to find
497 * @devp: Returns pointer to device if found, otherwise this is set to NULL
498 * @return 0 if OK, -ve on error
501 int device_find_global_by_ofnode(ofnode node, struct udevice **devp);
504 * device_get_global_by_ofnode() - Get a device based on ofnode
506 * Locates a device by its device tree ofnode, searching globally throughout
507 * the all driver model devices.
509 * The device is probed to activate it ready for use.
511 * @node: Device tree ofnode to find
512 * @devp: Returns pointer to device if found, otherwise this is set to NULL
513 * @return 0 if OK, -ve on error
515 int device_get_global_by_ofnode(ofnode node, struct udevice **devp);
518 * device_find_first_child() - Find the first child of a device
520 * @parent: Parent device to search
521 * @devp: Returns first child device, or NULL if none
524 int device_find_first_child(struct udevice *parent, struct udevice **devp);
527 * device_find_next_child() - Find the next child of a device
529 * @devp: Pointer to previous child device on entry. Returns pointer to next
530 * child device, or NULL if none
533 int device_find_next_child(struct udevice **devp);
536 * device_find_first_inactive_child() - Find the first inactive child
538 * This is used to locate an existing child of a device which is of a given
541 * The device is NOT probed
543 * @parent: Parent device to search
544 * @uclass_id: Uclass to look for
545 * @devp: Returns device found, if any
546 * @return 0 if found, else -ENODEV
548 int device_find_first_inactive_child(struct udevice *parent,
549 enum uclass_id uclass_id,
550 struct udevice **devp);
553 * device_find_first_child_by_uclass() - Find the first child of a device in uc
555 * @parent: Parent device to search
556 * @uclass_id: Uclass to look for
557 * @devp: Returns first child device in that uclass, if any
558 * @return 0 if found, else -ENODEV
560 int device_find_first_child_by_uclass(struct udevice *parent,
561 enum uclass_id uclass_id,
562 struct udevice **devp);
565 * device_find_child_by_name() - Find a child by device name
567 * @parent: Parent device to search
568 * @name: Name to look for
569 * @devp: Returns device found, if any
570 * @return 0 if found, else -ENODEV
572 int device_find_child_by_name(struct udevice *parent, const char *name,
573 struct udevice **devp);
576 * device_has_children() - check if a device has any children
578 * @dev: Device to check
579 * @return true if the device has one or more children
581 bool device_has_children(const struct udevice *dev);
584 * device_has_active_children() - check if a device has any active children
586 * @dev: Device to check
587 * @return true if the device has one or more children and at least one of
588 * them is active (probed).
590 bool device_has_active_children(struct udevice *dev);
593 * device_is_last_sibling() - check if a device is the last sibling
595 * This function can be useful for display purposes, when special action needs
596 * to be taken when displaying the last sibling. This can happen when a tree
597 * view of devices is being displayed.
599 * @dev: Device to check
600 * @return true if there are no more siblings after this one - i.e. is it
603 bool device_is_last_sibling(struct udevice *dev);
606 * device_set_name() - set the name of a device
608 * This must be called in the device's bind() method and no later. Normally
609 * this is unnecessary but for probed devices which don't get a useful name
610 * this function can be helpful.
612 * The name is allocated and will be freed automatically when the device is
615 * @dev: Device to update
616 * @name: New name (this string is allocated new memory and attached to
618 * @return 0 if OK, -ENOMEM if there is not enough memory to allocate the
621 int device_set_name(struct udevice *dev, const char *name);
624 * device_set_name_alloced() - note that a device name is allocated
626 * This sets the DM_FLAG_NAME_ALLOCED flag for the device, so that when it is
627 * unbound the name will be freed. This avoids memory leaks.
629 * @dev: Device to update
631 void device_set_name_alloced(struct udevice *dev);
634 * device_is_compatible() - check if the device is compatible with the compat
636 * This allows to check whether the device is comaptible with the compat.
638 * @dev: udevice pointer for which compatible needs to be verified.
639 * @compat: Compatible string which needs to verified in the given
641 * @return true if OK, false if the compatible is not found
643 bool device_is_compatible(struct udevice *dev, const char *compat);
646 * of_machine_is_compatible() - check if the machine is compatible with
649 * This allows to check whether the machine is comaptible with the compat.
651 * @compat: Compatible string which needs to verified
652 * @return true if OK, false if the compatible is not found
654 bool of_machine_is_compatible(const char *compat);
657 * dev_disable_by_path() - Disable a device given its device tree path
659 * @path: The device tree path identifying the device to be disabled
660 * @return 0 on success, -ve on error
662 int dev_disable_by_path(const char *path);
665 * dev_enable_by_path() - Enable a device given its device tree path
667 * @path: The device tree path identifying the device to be enabled
668 * @return 0 on success, -ve on error
670 int dev_enable_by_path(const char *path);
673 * device_is_on_pci_bus - Test if a device is on a PCI bus
675 * @dev: device to test
676 * @return: true if it is on a PCI bus, false otherwise
678 static inline bool device_is_on_pci_bus(struct udevice *dev)
680 return device_get_uclass_id(dev->parent) == UCLASS_PCI;
684 * device_foreach_child_safe() - iterate through child devices safely
686 * This allows the @pos child to be removed in the loop if required.
688 * @pos: struct udevice * for the current device
689 * @next: struct udevice * for the next device
690 * @parent: parent device to scan
692 #define device_foreach_child_safe(pos, next, parent) \
693 list_for_each_entry_safe(pos, next, &parent->child_head, sibling_node)
696 * device_foreach_child() - iterate through child devices
698 * @pos: struct udevice * for the current device
699 * @parent: parent device to scan
701 #define device_foreach_child(pos, parent) \
702 list_for_each_entry(pos, &parent->child_head, sibling_node)
705 * dm_scan_fdt_dev() - Bind child device in a the device tree
707 * This handles device which have sub-nodes in the device tree. It scans all
708 * sub-nodes and binds drivers for each node where a driver can be found.
710 * If this is called prior to relocation, only pre-relocation devices will be
711 * bound (those marked with u-boot,dm-pre-reloc in the device tree, or where
712 * the driver has the DM_FLAG_PRE_RELOC flag set). Otherwise, all devices will
715 * @dev: Device to scan
716 * @return 0 if OK, -ve on error
718 int dm_scan_fdt_dev(struct udevice *dev);
720 /* device resource management */
721 typedef void (*dr_release_t)(struct udevice *dev, void *res);
722 typedef int (*dr_match_t)(struct udevice *dev, void *res, void *match_data);
726 #ifdef CONFIG_DEBUG_DEVRES
727 void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp,
729 #define _devres_alloc(release, size, gfp) \
730 __devres_alloc(release, size, gfp, #release)
732 void *_devres_alloc(dr_release_t release, size_t size, gfp_t gfp);
736 * devres_alloc() - Allocate device resource data
737 * @release: Release function devres will be associated with
738 * @size: Allocation size
739 * @gfp: Allocation flags
741 * Allocate devres of @size bytes. The allocated area is associated
742 * with @release. The returned pointer can be passed to
743 * other devres_*() functions.
746 * Pointer to allocated devres on success, NULL on failure.
748 #define devres_alloc(release, size, gfp) \
749 _devres_alloc(release, size, gfp | __GFP_ZERO)
752 * devres_free() - Free device resource data
753 * @res: Pointer to devres data to free
755 * Free devres created with devres_alloc().
757 void devres_free(void *res);
760 * devres_add() - Register device resource
761 * @dev: Device to add resource to
762 * @res: Resource to register
764 * Register devres @res to @dev. @res should have been allocated
765 * using devres_alloc(). On driver detach, the associated release
766 * function will be invoked and devres will be freed automatically.
768 void devres_add(struct udevice *dev, void *res);
771 * devres_find() - Find device resource
772 * @dev: Device to lookup resource from
773 * @release: Look for resources associated with this release function
774 * @match: Match function (optional)
775 * @match_data: Data for the match function
777 * Find the latest devres of @dev which is associated with @release
778 * and for which @match returns 1. If @match is NULL, it's considered
781 * @return pointer to found devres, NULL if not found.
783 void *devres_find(struct udevice *dev, dr_release_t release,
784 dr_match_t match, void *match_data);
787 * devres_get() - Find devres, if non-existent, add one atomically
788 * @dev: Device to lookup or add devres for
789 * @new_res: Pointer to new initialized devres to add if not found
790 * @match: Match function (optional)
791 * @match_data: Data for the match function
793 * Find the latest devres of @dev which has the same release function
794 * as @new_res and for which @match return 1. If found, @new_res is
795 * freed; otherwise, @new_res is added atomically.
797 * @return ointer to found or added devres.
799 void *devres_get(struct udevice *dev, void *new_res,
800 dr_match_t match, void *match_data);
803 * devres_remove() - Find a device resource and remove it
804 * @dev: Device to find resource from
805 * @release: Look for resources associated with this release function
806 * @match: Match function (optional)
807 * @match_data: Data for the match function
809 * Find the latest devres of @dev associated with @release and for
810 * which @match returns 1. If @match is NULL, it's considered to
811 * match all. If found, the resource is removed atomically and
814 * @return ointer to removed devres on success, NULL if not found.
816 void *devres_remove(struct udevice *dev, dr_release_t release,
817 dr_match_t match, void *match_data);
820 * devres_destroy() - Find a device resource and destroy it
821 * @dev: Device to find resource from
822 * @release: Look for resources associated with this release function
823 * @match: Match function (optional)
824 * @match_data: Data for the match function
826 * Find the latest devres of @dev associated with @release and for
827 * which @match returns 1. If @match is NULL, it's considered to
828 * match all. If found, the resource is removed atomically and freed.
830 * Note that the release function for the resource will not be called,
831 * only the devres-allocated data will be freed. The caller becomes
832 * responsible for freeing any other data.
834 * @return 0 if devres is found and freed, -ENOENT if not found.
836 int devres_destroy(struct udevice *dev, dr_release_t release,
837 dr_match_t match, void *match_data);
840 * devres_release() - Find a device resource and destroy it, calling release
841 * @dev: Device to find resource from
842 * @release: Look for resources associated with this release function
843 * @match: Match function (optional)
844 * @match_data: Data for the match function
846 * Find the latest devres of @dev associated with @release and for
847 * which @match returns 1. If @match is NULL, it's considered to
848 * match all. If found, the resource is removed atomically, the
849 * release function called and the resource freed.
851 * @return 0 if devres is found and freed, -ENOENT if not found.
853 int devres_release(struct udevice *dev, dr_release_t release,
854 dr_match_t match, void *match_data);
856 /* managed devm_k.alloc/kfree for device drivers */
858 * devm_kmalloc() - Resource-managed kmalloc
859 * @dev: Device to allocate memory for
860 * @size: Allocation size
861 * @gfp: Allocation gfp flags
863 * Managed kmalloc. Memory allocated with this function is
864 * automatically freed on driver detach. Like all other devres
865 * resources, guaranteed alignment is unsigned long long.
867 * @return pointer to allocated memory on success, NULL on failure.
869 void *devm_kmalloc(struct udevice *dev, size_t size, gfp_t gfp);
870 static inline void *devm_kzalloc(struct udevice *dev, size_t size, gfp_t gfp)
872 return devm_kmalloc(dev, size, gfp | __GFP_ZERO);
874 static inline void *devm_kmalloc_array(struct udevice *dev,
875 size_t n, size_t size, gfp_t flags)
877 if (size != 0 && n > SIZE_MAX / size)
879 return devm_kmalloc(dev, n * size, flags);
881 static inline void *devm_kcalloc(struct udevice *dev,
882 size_t n, size_t size, gfp_t flags)
884 return devm_kmalloc_array(dev, n, size, flags | __GFP_ZERO);
888 * devm_kfree() - Resource-managed kfree
889 * @dev: Device this memory belongs to
890 * @ptr: Memory to free
892 * Free memory allocated with devm_kmalloc().
894 void devm_kfree(struct udevice *dev, void *ptr);
896 #else /* ! CONFIG_DEVRES */
898 static inline void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp)
900 return kzalloc(size, gfp);
903 static inline void devres_free(void *res)
908 static inline void devres_add(struct udevice *dev, void *res)
912 static inline void *devres_find(struct udevice *dev, dr_release_t release,
913 dr_match_t match, void *match_data)
918 static inline void *devres_get(struct udevice *dev, void *new_res,
919 dr_match_t match, void *match_data)
924 static inline void *devres_remove(struct udevice *dev, dr_release_t release,
925 dr_match_t match, void *match_data)
930 static inline int devres_destroy(struct udevice *dev, dr_release_t release,
931 dr_match_t match, void *match_data)
936 static inline int devres_release(struct udevice *dev, dr_release_t release,
937 dr_match_t match, void *match_data)
942 static inline void *devm_kmalloc(struct udevice *dev, size_t size, gfp_t gfp)
944 return kmalloc(size, gfp);
947 static inline void *devm_kzalloc(struct udevice *dev, size_t size, gfp_t gfp)
949 return kzalloc(size, gfp);
952 static inline void *devm_kmalloc_array(struct udevice *dev,
953 size_t n, size_t size, gfp_t flags)
955 /* TODO: add kmalloc_array() to linux/compat.h */
956 if (size != 0 && n > SIZE_MAX / size)
958 return kmalloc(n * size, flags);
961 static inline void *devm_kcalloc(struct udevice *dev,
962 size_t n, size_t size, gfp_t flags)
964 /* TODO: add kcalloc() to linux/compat.h */
965 return kmalloc(n * size, flags | __GFP_ZERO);
968 static inline void devm_kfree(struct udevice *dev, void *ptr)
973 #endif /* ! CONFIG_DEVRES */
977 * remove the following after resolving conflicts with <linux/compat.h>
997 * print device name like Linux
999 #define dev_printk(dev, fmt, ...) \
1001 printk(fmt, ##__VA_ARGS__); \
1004 #define __dev_printk(level, dev, fmt, ...) \
1006 if (level < CONFIG_VAL(LOGLEVEL)) \
1007 dev_printk(dev, fmt, ##__VA_ARGS__); \
1010 #define dev_emerg(dev, fmt, ...) \
1011 __dev_printk(0, dev, fmt, ##__VA_ARGS__)
1012 #define dev_alert(dev, fmt, ...) \
1013 __dev_printk(1, dev, fmt, ##__VA_ARGS__)
1014 #define dev_crit(dev, fmt, ...) \
1015 __dev_printk(2, dev, fmt, ##__VA_ARGS__)
1016 #define dev_err(dev, fmt, ...) \
1017 __dev_printk(3, dev, fmt, ##__VA_ARGS__)
1018 #define dev_warn(dev, fmt, ...) \
1019 __dev_printk(4, dev, fmt, ##__VA_ARGS__)
1020 #define dev_notice(dev, fmt, ...) \
1021 __dev_printk(5, dev, fmt, ##__VA_ARGS__)
1022 #define dev_info(dev, fmt, ...) \
1023 __dev_printk(6, dev, fmt, ##__VA_ARGS__)
1026 #define dev_dbg(dev, fmt, ...) \
1027 __dev_printk(7, dev, fmt, ##__VA_ARGS__)
1029 #define dev_dbg(dev, fmt, ...) \
1032 __dev_printk(7, dev, fmt, ##__VA_ARGS__); \
1036 #ifdef VERBOSE_DEBUG
1037 #define dev_vdbg dev_dbg
1039 #define dev_vdbg(dev, fmt, ...) \
1042 __dev_printk(7, dev, fmt, ##__VA_ARGS__); \