2 * Copyright (c) 2013 Google, Inc
5 * Pavel Herrmann <morpheus.ibis@gmail.com>
6 * Marek Vasut <marex@denx.de>
8 * SPDX-License-Identifier: GPL-2.0+
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>
23 /* Driver is active (probed). Cleared when it is removed */
24 #define DM_FLAG_ACTIVATED (1 << 0)
26 /* DM is responsible for allocating and freeing platdata */
27 #define DM_FLAG_ALLOC_PDATA (1 << 1)
29 /* DM should init this device prior to relocation */
30 #define DM_FLAG_PRE_RELOC (1 << 2)
32 /* DM is responsible for allocating and freeing parent_platdata */
33 #define DM_FLAG_ALLOC_PARENT_PDATA (1 << 3)
35 /* DM is responsible for allocating and freeing uclass_platdata */
36 #define DM_FLAG_ALLOC_UCLASS_PDATA (1 << 4)
38 /* Allocate driver private data on a DMA boundary */
39 #define DM_FLAG_ALLOC_PRIV_DMA (1 << 5)
42 #define DM_FLAG_BOUND (1 << 6)
44 /* Device name is allocated and should be freed on unbind() */
45 #define DM_NAME_ALLOCED (1 << 7)
48 * struct udevice - An instance of a driver
50 * This holds information about a device, which is a driver bound to a
51 * particular port or peripheral (essentially a driver instance).
53 * A device will come into existence through a 'bind' call, either due to
54 * a U_BOOT_DEVICE() macro (in which case platdata is non-NULL) or a node
55 * in the device tree (in which case of_offset is >= 0). In the latter case
56 * we translate the device tree information into platdata in a function
57 * implemented by the driver ofdata_to_platdata method (called just before the
58 * probe method if the device has a device tree node.
60 * All three of platdata, priv and uclass_priv can be allocated by the
61 * driver, or you can use the auto_alloc_size members of struct driver and
62 * struct uclass_driver to have driver model do this automatically.
64 * @driver: The driver used by this device
65 * @name: Name of device, typically the FDT node name
66 * @platdata: Configuration data for this device
67 * @parent_platdata: The parent bus's configuration data for this device
68 * @uclass_platdata: The uclass's configuration data for this device
69 * @of_offset: Device tree node offset for this device (- for none)
70 * @driver_data: Driver data word for the entry that matched this device with
72 * @parent: Parent of this device, or NULL for the top level device
73 * @priv: Private data for this device
74 * @uclass: Pointer to uclass for this device
75 * @uclass_priv: The uclass's private data for this device
76 * @parent_priv: The parent's private data for this device
77 * @uclass_node: Used by uclass to link its devices
78 * @child_head: List of children of this device
79 * @sibling_node: Next device in list of all devices
80 * @flags: Flags for this device DM_FLAG_...
81 * @req_seq: Requested sequence number for this device (-1 = any)
82 * @seq: Allocated sequence number for this device (-1 = none). This is set up
83 * when the device is probed and will be unique within the device's uclass.
84 * @devres_head: List of memory allocations associated with this device.
85 * When CONFIG_DEVRES is enabled, devm_kmalloc() and friends will
86 * add to this list. Memory so-allocated will be freed
87 * automatically when the device is removed / unbound
90 const struct driver *driver;
93 void *parent_platdata;
94 void *uclass_platdata;
97 struct udevice *parent;
99 struct uclass *uclass;
102 struct list_head uclass_node;
103 struct list_head child_head;
104 struct list_head sibling_node;
109 struct list_head devres_head;
113 /* Maximum sequence number supported */
114 #define DM_MAX_SEQ 999
116 /* Returns the operations for a device */
117 #define device_get_ops(dev) (dev->driver->ops)
119 /* Returns non-zero if the device is active (probed and not removed) */
120 #define device_active(dev) ((dev)->flags & DM_FLAG_ACTIVATED)
123 * struct udevice_id - Lists the compatible strings supported by a driver
124 * @compatible: Compatible string
125 * @data: Data for this compatible string
128 const char *compatible;
132 #if CONFIG_IS_ENABLED(OF_CONTROL)
133 #define of_match_ptr(_ptr) (_ptr)
135 #define of_match_ptr(_ptr) NULL
136 #endif /* CONFIG_IS_ENABLED(OF_CONTROL) */
139 * struct driver - A driver for a feature or peripheral
141 * This holds methods for setting up a new device, and also removing it.
142 * The device needs information to set itself up - this is provided either
143 * by platdata or a device tree node (which we find by looking up
144 * matching compatible strings with of_match).
146 * Drivers all belong to a uclass, representing a class of devices of the
147 * same type. Common elements of the drivers can be implemented in the uclass,
148 * or the uclass can provide a consistent interface to the drivers within
152 * @id: Identiies the uclass we belong to
153 * @of_match: List of compatible strings to match, and any identifying data
155 * @bind: Called to bind a device to its driver
156 * @probe: Called to probe a device, i.e. activate it
157 * @remove: Called to remove a device, i.e. de-activate it
158 * @unbind: Called to unbind a device from its driver
159 * @ofdata_to_platdata: Called before probe to decode device tree data
160 * @child_post_bind: Called after a new child has been bound
161 * @child_pre_probe: Called before a child device is probed. The device has
162 * memory allocated but it has not yet been probed.
163 * @child_post_remove: Called after a child device is removed. The device
164 * has memory allocated but its device_remove() method has been called.
165 * @priv_auto_alloc_size: If non-zero this is the size of the private data
166 * to be allocated in the device's ->priv pointer. If zero, then the driver
167 * is responsible for allocating any data required.
168 * @platdata_auto_alloc_size: If non-zero this is the size of the
169 * platform data to be allocated in the device's ->platdata pointer.
170 * This is typically only useful for device-tree-aware drivers (those with
171 * an of_match), since drivers which use platdata will have the data
172 * provided in the U_BOOT_DEVICE() instantiation.
173 * @per_child_auto_alloc_size: Each device can hold private data owned by
174 * its parent. If required this will be automatically allocated if this
176 * @per_child_platdata_auto_alloc_size: A bus likes to store information about
177 * its children. If non-zero this is the size of this data, to be allocated
178 * in the child's parent_platdata pointer.
179 * @ops: Driver-specific operations. This is typically a list of function
180 * pointers defined by the driver, to implement driver functions required by
182 * @flags: driver flags - see DM_FLAGS_...
187 const struct udevice_id *of_match;
188 int (*bind)(struct udevice *dev);
189 int (*probe)(struct udevice *dev);
190 int (*remove)(struct udevice *dev);
191 int (*unbind)(struct udevice *dev);
192 int (*ofdata_to_platdata)(struct udevice *dev);
193 int (*child_post_bind)(struct udevice *dev);
194 int (*child_pre_probe)(struct udevice *dev);
195 int (*child_post_remove)(struct udevice *dev);
196 int priv_auto_alloc_size;
197 int platdata_auto_alloc_size;
198 int per_child_auto_alloc_size;
199 int per_child_platdata_auto_alloc_size;
200 const void *ops; /* driver-specific operations */
204 /* Declare a new U-Boot driver */
205 #define U_BOOT_DRIVER(__name) \
206 ll_entry_declare(struct driver, __name, driver)
209 * dev_get_platdata() - Get the platform data for a device
211 * This checks that dev is not NULL, but no other checks for now
213 * @dev Device to check
214 * @return platform data, or NULL if none
216 void *dev_get_platdata(struct udevice *dev);
219 * dev_get_parent_platdata() - Get the parent platform data for a device
221 * This checks that dev is not NULL, but no other checks for now
223 * @dev Device to check
224 * @return parent's platform data, or NULL if none
226 void *dev_get_parent_platdata(struct udevice *dev);
229 * dev_get_uclass_platdata() - Get the uclass platform data for a device
231 * This checks that dev is not NULL, but no other checks for now
233 * @dev Device to check
234 * @return uclass's platform data, or NULL if none
236 void *dev_get_uclass_platdata(struct udevice *dev);
239 * dev_get_priv() - Get the private data for a device
241 * This checks that dev is not NULL, but no other checks for now
243 * @dev Device to check
244 * @return private data, or NULL if none
246 void *dev_get_priv(struct udevice *dev);
249 * dev_get_parent_priv() - Get the parent private data for a device
251 * The parent private data is data stored in the device but owned by the
252 * parent. For example, a USB device may have parent data which contains
253 * information about how to talk to the device over USB.
255 * This checks that dev is not NULL, but no other checks for now
257 * @dev Device to check
258 * @return parent data, or NULL if none
260 void *dev_get_parent_priv(struct udevice *dev);
263 * dev_get_uclass_priv() - Get the private uclass data for a device
265 * This checks that dev is not NULL, but no other checks for now
267 * @dev Device to check
268 * @return private uclass data for this device, or NULL if none
270 void *dev_get_uclass_priv(struct udevice *dev);
273 * struct dev_get_parent() - Get the parent of a device
275 * @child: Child to check
276 * @return parent of child, or NULL if this is the root device
278 struct udevice *dev_get_parent(struct udevice *child);
281 * dev_get_driver_data() - get the driver data used to bind a device
283 * When a device is bound using a device tree node, it matches a
284 * particular compatible string in struct udevice_id. This function
285 * returns the associated data value for that compatible string. This is
286 * the 'data' field in struct udevice_id.
288 * As an example, consider this structure:
289 * static const struct udevice_id tegra_i2c_ids[] = {
290 * { .compatible = "nvidia,tegra114-i2c", .data = TYPE_114 },
291 * { .compatible = "nvidia,tegra20-i2c", .data = TYPE_STD },
292 * { .compatible = "nvidia,tegra20-i2c-dvc", .data = TYPE_DVC },
296 * When driver model finds a driver for this it will store the 'data' value
297 * corresponding to the compatible string it matches. This function returns
298 * that value. This allows the driver to handle several variants of a device.
300 * For USB devices, this is the driver_info field in struct usb_device_id.
302 * @dev: Device to check
303 * @return driver data (0 if none is provided)
305 ulong dev_get_driver_data(struct udevice *dev);
308 * dev_get_driver_ops() - get the device's driver's operations
310 * This checks that dev is not NULL, and returns the pointer to device's
311 * driver's operations.
313 * @dev: Device to check
314 * @return void pointer to driver's operations or NULL for NULL-dev or NULL-ops
316 const void *dev_get_driver_ops(struct udevice *dev);
319 * device_get_uclass_id() - return the uclass ID of a device
321 * @dev: Device to check
322 * @return uclass ID for the device
324 enum uclass_id device_get_uclass_id(struct udevice *dev);
327 * dev_get_uclass_name() - return the uclass name of a device
329 * This checks that dev is not NULL.
331 * @dev: Device to check
332 * @return pointer to the uclass name for the device
334 const char *dev_get_uclass_name(struct udevice *dev);
337 * device_get_child() - Get the child of a device by index
339 * Returns the numbered child, 0 being the first. This does not use
340 * sequence numbers, only the natural order.
342 * @dev: Parent device to check
343 * @index: Child index
344 * @devp: Returns pointer to device
345 * @return 0 if OK, -ENODEV if no such device, other error if the device fails
348 int device_get_child(struct udevice *parent, int index, struct udevice **devp);
351 * device_find_child_by_seq() - Find a child device based on a sequence
353 * This searches for a device with the given seq or req_seq.
355 * For seq, if an active device has this sequence it will be returned.
356 * If there is no such device then this will return -ENODEV.
358 * For req_seq, if a device (whether activated or not) has this req_seq
359 * value, that device will be returned. This is a strong indication that
360 * the device will receive that sequence when activated.
362 * @parent: Parent device
363 * @seq_or_req_seq: Sequence number to find (0=first)
364 * @find_req_seq: true to find req_seq, false to find seq
365 * @devp: Returns pointer to device (there is only one per for each seq).
366 * Set to NULL if none is found
367 * @return 0 if OK, -ve on error
369 int device_find_child_by_seq(struct udevice *parent, int seq_or_req_seq,
370 bool find_req_seq, struct udevice **devp);
373 * device_get_child_by_seq() - Get a child device based on a sequence
375 * If an active device has this sequence it will be returned. If there is no
376 * such device then this will check for a device that is requesting this
379 * The device is probed to activate it ready for use.
381 * @parent: Parent device
382 * @seq: Sequence number to find (0=first)
383 * @devp: Returns pointer to device (there is only one per for each seq)
384 * Set to NULL if none is found
385 * @return 0 if OK, -ve on error
387 int device_get_child_by_seq(struct udevice *parent, int seq,
388 struct udevice **devp);
391 * device_find_child_by_of_offset() - Find a child device based on FDT offset
393 * Locates a child device by its device tree offset.
395 * @parent: Parent device
396 * @of_offset: Device tree offset to find
397 * @devp: Returns pointer to device if found, otherwise this is set to NULL
398 * @return 0 if OK, -ve on error
400 int device_find_child_by_of_offset(struct udevice *parent, int of_offset,
401 struct udevice **devp);
404 * device_get_child_by_of_offset() - Get a child device based on FDT offset
406 * Locates a child device by its device tree offset.
408 * The device is probed to activate it ready for use.
410 * @parent: Parent device
411 * @of_offset: Device tree offset to find
412 * @devp: Returns pointer to device if found, otherwise this is set to NULL
413 * @return 0 if OK, -ve on error
415 int device_get_child_by_of_offset(struct udevice *parent, int of_offset,
416 struct udevice **devp);
419 * device_get_global_by_of_offset() - Get a device based on FDT offset
421 * Locates a device by its device tree offset, searching globally throughout
422 * the all driver model devices.
424 * The device is probed to activate it ready for use.
426 * @of_offset: Device tree offset to find
427 * @devp: Returns pointer to device if found, otherwise this is set to NULL
428 * @return 0 if OK, -ve on error
430 int device_get_global_by_of_offset(int of_offset, struct udevice **devp);
433 * device_find_first_child() - Find the first child of a device
435 * @parent: Parent device to search
436 * @devp: Returns first child device, or NULL if none
439 int device_find_first_child(struct udevice *parent, struct udevice **devp);
442 * device_find_next_child() - Find the next child of a device
444 * @devp: Pointer to previous child device on entry. Returns pointer to next
445 * child device, or NULL if none
448 int device_find_next_child(struct udevice **devp);
451 * dev_get_addr() - Get the reg property of a device
453 * @dev: Pointer to a device
457 fdt_addr_t dev_get_addr(struct udevice *dev);
460 * dev_get_addr_ptr() - Return pointer to the address of the reg property
463 * @dev: Pointer to a device
465 * @return Pointer to addr, or NULL if there is no such property
467 void *dev_get_addr_ptr(struct udevice *dev);
470 * dev_get_addr_index() - Get the indexed reg property of a device
472 * @dev: Pointer to a device
473 * @index: the 'reg' property can hold a list of <addr, size> pairs
474 * and @index is used to select which one is required
478 fdt_addr_t dev_get_addr_index(struct udevice *dev, int index);
481 * dev_get_addr_name() - Get the reg property of a device, indexed by name
483 * @dev: Pointer to a device
484 * @name: the 'reg' property can hold a list of <addr, size> pairs, with the
485 * 'reg-names' property providing named-based identification. @index
486 * indicates the value to search for in 'reg-names'.
490 fdt_addr_t dev_get_addr_name(struct udevice *dev, const char *name);
493 * device_has_children() - check if a device has any children
495 * @dev: Device to check
496 * @return true if the device has one or more children
498 bool device_has_children(struct udevice *dev);
501 * device_has_active_children() - check if a device has any active children
503 * @dev: Device to check
504 * @return true if the device has one or more children and at least one of
505 * them is active (probed).
507 bool device_has_active_children(struct udevice *dev);
510 * device_is_last_sibling() - check if a device is the last sibling
512 * This function can be useful for display purposes, when special action needs
513 * to be taken when displaying the last sibling. This can happen when a tree
514 * view of devices is being displayed.
516 * @dev: Device to check
517 * @return true if there are no more siblings after this one - i.e. is it
520 bool device_is_last_sibling(struct udevice *dev);
523 * device_set_name() - set the name of a device
525 * This must be called in the device's bind() method and no later. Normally
526 * this is unnecessary but for probed devices which don't get a useful name
527 * this function can be helpful.
529 * The name is allocated and will be freed automatically when the device is
532 * @dev: Device to update
533 * @name: New name (this string is allocated new memory and attached to
535 * @return 0 if OK, -ENOMEM if there is not enough memory to allocate the
538 int device_set_name(struct udevice *dev, const char *name);
541 * device_set_name_alloced() - note that a device name is allocated
543 * This sets the DM_NAME_ALLOCED flag for the device, so that when it is
544 * unbound the name will be freed. This avoids memory leaks.
546 * @dev: Device to update
548 void device_set_name_alloced(struct udevice *dev);
551 * of_device_is_compatible() - check if the device is compatible with the compat
553 * This allows to check whether the device is comaptible with the compat.
555 * @dev: udevice pointer for which compatible needs to be verified.
556 * @compat: Compatible string which needs to verified in the given
558 * @return true if OK, false if the compatible is not found
560 bool of_device_is_compatible(struct udevice *dev, const char *compat);
563 * of_machine_is_compatible() - check if the machine is compatible with
566 * This allows to check whether the machine is comaptible with the compat.
568 * @compat: Compatible string which needs to verified
569 * @return true if OK, false if the compatible is not found
571 bool of_machine_is_compatible(const char *compat);
574 * device_is_on_pci_bus - Test if a device is on a PCI bus
576 * @dev: device to test
577 * @return: true if it is on a PCI bus, false otherwise
579 static inline bool device_is_on_pci_bus(struct udevice *dev)
581 return device_get_uclass_id(dev->parent) == UCLASS_PCI;
585 * device_foreach_child_safe() - iterate through child devices safely
587 * This allows the @pos child to be removed in the loop if required.
589 * @pos: struct udevice * for the current device
590 * @next: struct udevice * for the next device
591 * @parent: parent device to scan
593 #define device_foreach_child_safe(pos, next, parent) \
594 list_for_each_entry_safe(pos, next, &parent->child_head, sibling_node)
596 /* device resource management */
597 typedef void (*dr_release_t)(struct udevice *dev, void *res);
598 typedef int (*dr_match_t)(struct udevice *dev, void *res, void *match_data);
602 #ifdef CONFIG_DEBUG_DEVRES
603 void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp,
605 #define _devres_alloc(release, size, gfp) \
606 __devres_alloc(release, size, gfp, #release)
608 void *_devres_alloc(dr_release_t release, size_t size, gfp_t gfp);
612 * devres_alloc() - Allocate device resource data
613 * @release: Release function devres will be associated with
614 * @size: Allocation size
615 * @gfp: Allocation flags
617 * Allocate devres of @size bytes. The allocated area is associated
618 * with @release. The returned pointer can be passed to
619 * other devres_*() functions.
622 * Pointer to allocated devres on success, NULL on failure.
624 #define devres_alloc(release, size, gfp) \
625 _devres_alloc(release, size, gfp | __GFP_ZERO)
628 * devres_free() - Free device resource data
629 * @res: Pointer to devres data to free
631 * Free devres created with devres_alloc().
633 void devres_free(void *res);
636 * devres_add() - Register device resource
637 * @dev: Device to add resource to
638 * @res: Resource to register
640 * Register devres @res to @dev. @res should have been allocated
641 * using devres_alloc(). On driver detach, the associated release
642 * function will be invoked and devres will be freed automatically.
644 void devres_add(struct udevice *dev, void *res);
647 * devres_find() - Find device resource
648 * @dev: Device to lookup resource from
649 * @release: Look for resources associated with this release function
650 * @match: Match function (optional)
651 * @match_data: Data for the match function
653 * Find the latest devres of @dev which is associated with @release
654 * and for which @match returns 1. If @match is NULL, it's considered
657 * @return pointer to found devres, NULL if not found.
659 void *devres_find(struct udevice *dev, dr_release_t release,
660 dr_match_t match, void *match_data);
663 * devres_get() - Find devres, if non-existent, add one atomically
664 * @dev: Device to lookup or add devres for
665 * @new_res: Pointer to new initialized devres to add if not found
666 * @match: Match function (optional)
667 * @match_data: Data for the match function
669 * Find the latest devres of @dev which has the same release function
670 * as @new_res and for which @match return 1. If found, @new_res is
671 * freed; otherwise, @new_res is added atomically.
673 * @return ointer to found or added devres.
675 void *devres_get(struct udevice *dev, void *new_res,
676 dr_match_t match, void *match_data);
679 * devres_remove() - Find a device resource and remove it
680 * @dev: Device to find resource from
681 * @release: Look for resources associated with this release function
682 * @match: Match function (optional)
683 * @match_data: Data for the match function
685 * Find the latest devres of @dev associated with @release and for
686 * which @match returns 1. If @match is NULL, it's considered to
687 * match all. If found, the resource is removed atomically and
690 * @return ointer to removed devres on success, NULL if not found.
692 void *devres_remove(struct udevice *dev, dr_release_t release,
693 dr_match_t match, void *match_data);
696 * devres_destroy() - Find a device resource and destroy it
697 * @dev: Device to find resource from
698 * @release: Look for resources associated with this release function
699 * @match: Match function (optional)
700 * @match_data: Data for the match function
702 * Find the latest devres of @dev associated with @release and for
703 * which @match returns 1. If @match is NULL, it's considered to
704 * match all. If found, the resource is removed atomically and freed.
706 * Note that the release function for the resource will not be called,
707 * only the devres-allocated data will be freed. The caller becomes
708 * responsible for freeing any other data.
710 * @return 0 if devres is found and freed, -ENOENT if not found.
712 int devres_destroy(struct udevice *dev, dr_release_t release,
713 dr_match_t match, void *match_data);
716 * devres_release() - Find a device resource and destroy it, calling release
717 * @dev: Device to find resource from
718 * @release: Look for resources associated with this release function
719 * @match: Match function (optional)
720 * @match_data: Data for the match function
722 * Find the latest devres of @dev associated with @release and for
723 * which @match returns 1. If @match is NULL, it's considered to
724 * match all. If found, the resource is removed atomically, the
725 * release function called and the resource freed.
727 * @return 0 if devres is found and freed, -ENOENT if not found.
729 int devres_release(struct udevice *dev, dr_release_t release,
730 dr_match_t match, void *match_data);
732 /* managed devm_k.alloc/kfree for device drivers */
734 * devm_kmalloc() - Resource-managed kmalloc
735 * @dev: Device to allocate memory for
736 * @size: Allocation size
737 * @gfp: Allocation gfp flags
739 * Managed kmalloc. Memory allocated with this function is
740 * automatically freed on driver detach. Like all other devres
741 * resources, guaranteed alignment is unsigned long long.
743 * @return pointer to allocated memory on success, NULL on failure.
745 void *devm_kmalloc(struct udevice *dev, size_t size, gfp_t gfp);
746 static inline void *devm_kzalloc(struct udevice *dev, size_t size, gfp_t gfp)
748 return devm_kmalloc(dev, size, gfp | __GFP_ZERO);
750 static inline void *devm_kmalloc_array(struct udevice *dev,
751 size_t n, size_t size, gfp_t flags)
753 if (size != 0 && n > SIZE_MAX / size)
755 return devm_kmalloc(dev, n * size, flags);
757 static inline void *devm_kcalloc(struct udevice *dev,
758 size_t n, size_t size, gfp_t flags)
760 return devm_kmalloc_array(dev, n, size, flags | __GFP_ZERO);
764 * devm_kfree() - Resource-managed kfree
765 * @dev: Device this memory belongs to
766 * @ptr: Memory to free
768 * Free memory allocated with devm_kmalloc().
770 void devm_kfree(struct udevice *dev, void *ptr);
772 #else /* ! CONFIG_DEVRES */
774 static inline void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp)
776 return kzalloc(size, gfp);
779 static inline void devres_free(void *res)
784 static inline void devres_add(struct udevice *dev, void *res)
788 static inline void *devres_find(struct udevice *dev, dr_release_t release,
789 dr_match_t match, void *match_data)
794 static inline void *devres_get(struct udevice *dev, void *new_res,
795 dr_match_t match, void *match_data)
800 static inline void *devres_remove(struct udevice *dev, dr_release_t release,
801 dr_match_t match, void *match_data)
806 static inline int devres_destroy(struct udevice *dev, dr_release_t release,
807 dr_match_t match, void *match_data)
812 static inline int devres_release(struct udevice *dev, dr_release_t release,
813 dr_match_t match, void *match_data)
818 static inline void *devm_kmalloc(struct udevice *dev, size_t size, gfp_t gfp)
820 return kmalloc(size, gfp);
823 static inline void *devm_kzalloc(struct udevice *dev, size_t size, gfp_t gfp)
825 return kzalloc(size, gfp);
828 static inline void *devm_kmaloc_array(struct udevice *dev,
829 size_t n, size_t size, gfp_t flags)
831 /* TODO: add kmalloc_array() to linux/compat.h */
832 if (size != 0 && n > SIZE_MAX / size)
834 return kmalloc(n * size, flags);
837 static inline void *devm_kcalloc(struct udevice *dev,
838 size_t n, size_t size, gfp_t flags)
840 /* TODO: add kcalloc() to linux/compat.h */
841 return kmalloc(n * size, flags | __GFP_ZERO);
844 static inline void devm_kfree(struct udevice *dev, void *ptr)
849 #endif /* ! CONFIG_DEVRES */
852 * dm_set_translation_offset() - Set translation offset
853 * @offs: Translation offset
855 * Some platforms need a special address translation. Those
856 * platforms (e.g. mvebu in SPL) can configure a translation
857 * offset in the DM by calling this function. It will be
858 * added to all addresses returned in dev_get_addr().
860 void dm_set_translation_offset(fdt_addr_t offs);
863 * dm_get_translation_offset() - Get translation offset
865 * This function returns the translation offset that can
866 * be configured by calling dm_set_translation_offset().
868 * @return translation offset for the device address (0 as default).
870 fdt_addr_t dm_get_translation_offset(void);