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_FLAG_NAME_ALLOCED (1 << 7)
47 #define DM_FLAG_OF_PLATDATA (1 << 8)
50 * struct udevice - An instance of a driver
52 * This holds information about a device, which is a driver bound to a
53 * particular port or peripheral (essentially a driver instance).
55 * A device will come into existence through a 'bind' call, either due to
56 * a U_BOOT_DEVICE() macro (in which case platdata is non-NULL) or a node
57 * in the device tree (in which case of_offset is >= 0). In the latter case
58 * we translate the device tree information into platdata in a function
59 * implemented by the driver ofdata_to_platdata method (called just before the
60 * probe method if the device has a device tree node.
62 * All three of platdata, priv and uclass_priv can be allocated by the
63 * driver, or you can use the auto_alloc_size members of struct driver and
64 * struct uclass_driver to have driver model do this automatically.
66 * @driver: The driver used by this device
67 * @name: Name of device, typically the FDT node name
68 * @platdata: Configuration data for this device
69 * @parent_platdata: The parent bus's configuration data for this device
70 * @uclass_platdata: The uclass's configuration data for this device
71 * @of_offset: Device tree node offset for this device (- for none)
72 * @driver_data: Driver data word for the entry that matched this device with
74 * @parent: Parent of this device, or NULL for the top level device
75 * @priv: Private data for this device
76 * @uclass: Pointer to uclass for this device
77 * @uclass_priv: The uclass's private data for this device
78 * @parent_priv: The parent's private data for this device
79 * @uclass_node: Used by uclass to link its devices
80 * @child_head: List of children of this device
81 * @sibling_node: Next device in list of all devices
82 * @flags: Flags for this device DM_FLAG_...
83 * @req_seq: Requested sequence number for this device (-1 = any)
84 * @seq: Allocated sequence number for this device (-1 = none). This is set up
85 * when the device is probed and will be unique within the device's uclass.
86 * @devres_head: List of memory allocations associated with this device.
87 * When CONFIG_DEVRES is enabled, devm_kmalloc() and friends will
88 * add to this list. Memory so-allocated will be freed
89 * automatically when the device is removed / unbound
92 const struct driver *driver;
95 void *parent_platdata;
96 void *uclass_platdata;
99 struct udevice *parent;
101 struct uclass *uclass;
104 struct list_head uclass_node;
105 struct list_head child_head;
106 struct list_head sibling_node;
111 struct list_head devres_head;
115 /* Maximum sequence number supported */
116 #define DM_MAX_SEQ 999
118 /* Returns the operations for a device */
119 #define device_get_ops(dev) (dev->driver->ops)
121 /* Returns non-zero if the device is active (probed and not removed) */
122 #define device_active(dev) ((dev)->flags & DM_FLAG_ACTIVATED)
125 * struct udevice_id - Lists the compatible strings supported by a driver
126 * @compatible: Compatible string
127 * @data: Data for this compatible string
130 const char *compatible;
134 #if CONFIG_IS_ENABLED(OF_CONTROL)
135 #define of_match_ptr(_ptr) (_ptr)
137 #define of_match_ptr(_ptr) NULL
138 #endif /* CONFIG_IS_ENABLED(OF_CONTROL) */
141 * struct driver - A driver for a feature or peripheral
143 * This holds methods for setting up a new device, and also removing it.
144 * The device needs information to set itself up - this is provided either
145 * by platdata or a device tree node (which we find by looking up
146 * matching compatible strings with of_match).
148 * Drivers all belong to a uclass, representing a class of devices of the
149 * same type. Common elements of the drivers can be implemented in the uclass,
150 * or the uclass can provide a consistent interface to the drivers within
154 * @id: Identiies the uclass we belong to
155 * @of_match: List of compatible strings to match, and any identifying data
157 * @bind: Called to bind a device to its driver
158 * @probe: Called to probe a device, i.e. activate it
159 * @remove: Called to remove a device, i.e. de-activate it
160 * @unbind: Called to unbind a device from its driver
161 * @ofdata_to_platdata: Called before probe to decode device tree data
162 * @child_post_bind: Called after a new child has been bound
163 * @child_pre_probe: Called before a child device is probed. The device has
164 * memory allocated but it has not yet been probed.
165 * @child_post_remove: Called after a child device is removed. The device
166 * has memory allocated but its device_remove() method has been called.
167 * @priv_auto_alloc_size: If non-zero this is the size of the private data
168 * to be allocated in the device's ->priv pointer. If zero, then the driver
169 * is responsible for allocating any data required.
170 * @platdata_auto_alloc_size: If non-zero this is the size of the
171 * platform data to be allocated in the device's ->platdata pointer.
172 * This is typically only useful for device-tree-aware drivers (those with
173 * an of_match), since drivers which use platdata will have the data
174 * provided in the U_BOOT_DEVICE() instantiation.
175 * @per_child_auto_alloc_size: Each device can hold private data owned by
176 * its parent. If required this will be automatically allocated if this
178 * @per_child_platdata_auto_alloc_size: A bus likes to store information about
179 * its children. If non-zero this is the size of this data, to be allocated
180 * in the child's parent_platdata pointer.
181 * @ops: Driver-specific operations. This is typically a list of function
182 * pointers defined by the driver, to implement driver functions required by
184 * @flags: driver flags - see DM_FLAGS_...
189 const struct udevice_id *of_match;
190 int (*bind)(struct udevice *dev);
191 int (*probe)(struct udevice *dev);
192 int (*remove)(struct udevice *dev);
193 int (*unbind)(struct udevice *dev);
194 int (*ofdata_to_platdata)(struct udevice *dev);
195 int (*child_post_bind)(struct udevice *dev);
196 int (*child_pre_probe)(struct udevice *dev);
197 int (*child_post_remove)(struct udevice *dev);
198 int priv_auto_alloc_size;
199 int platdata_auto_alloc_size;
200 int per_child_auto_alloc_size;
201 int per_child_platdata_auto_alloc_size;
202 const void *ops; /* driver-specific operations */
206 /* Declare a new U-Boot driver */
207 #define U_BOOT_DRIVER(__name) \
208 ll_entry_declare(struct driver, __name, driver)
210 /* Get a pointer to a given driver */
211 #define DM_GET_DRIVER(__name) \
212 ll_entry_get(struct driver, __name, driver)
215 * dev_get_platdata() - Get the platform data for a device
217 * This checks that dev is not NULL, but no other checks for now
219 * @dev Device to check
220 * @return platform data, or NULL if none
222 void *dev_get_platdata(struct udevice *dev);
225 * dev_get_parent_platdata() - Get the parent platform data for a device
227 * This checks that dev is not NULL, but no other checks for now
229 * @dev Device to check
230 * @return parent's platform data, or NULL if none
232 void *dev_get_parent_platdata(struct udevice *dev);
235 * dev_get_uclass_platdata() - Get the uclass platform data for a device
237 * This checks that dev is not NULL, but no other checks for now
239 * @dev Device to check
240 * @return uclass's platform data, or NULL if none
242 void *dev_get_uclass_platdata(struct udevice *dev);
245 * dev_get_priv() - Get the private data for a device
247 * This checks that dev is not NULL, but no other checks for now
249 * @dev Device to check
250 * @return private data, or NULL if none
252 void *dev_get_priv(struct udevice *dev);
255 * dev_get_parent_priv() - Get the parent private data for a device
257 * The parent private data is data stored in the device but owned by the
258 * parent. For example, a USB device may have parent data which contains
259 * information about how to talk to the device over USB.
261 * This checks that dev is not NULL, but no other checks for now
263 * @dev Device to check
264 * @return parent data, or NULL if none
266 void *dev_get_parent_priv(struct udevice *dev);
269 * dev_get_uclass_priv() - Get the private uclass data for a device
271 * This checks that dev is not NULL, but no other checks for now
273 * @dev Device to check
274 * @return private uclass data for this device, or NULL if none
276 void *dev_get_uclass_priv(struct udevice *dev);
279 * struct dev_get_parent() - Get the parent of a device
281 * @child: Child to check
282 * @return parent of child, or NULL if this is the root device
284 struct udevice *dev_get_parent(struct udevice *child);
287 * dev_get_driver_data() - get the driver data used to bind a device
289 * When a device is bound using a device tree node, it matches a
290 * particular compatible string in struct udevice_id. This function
291 * returns the associated data value for that compatible string. This is
292 * the 'data' field in struct udevice_id.
294 * As an example, consider this structure:
295 * static const struct udevice_id tegra_i2c_ids[] = {
296 * { .compatible = "nvidia,tegra114-i2c", .data = TYPE_114 },
297 * { .compatible = "nvidia,tegra20-i2c", .data = TYPE_STD },
298 * { .compatible = "nvidia,tegra20-i2c-dvc", .data = TYPE_DVC },
302 * When driver model finds a driver for this it will store the 'data' value
303 * corresponding to the compatible string it matches. This function returns
304 * that value. This allows the driver to handle several variants of a device.
306 * For USB devices, this is the driver_info field in struct usb_device_id.
308 * @dev: Device to check
309 * @return driver data (0 if none is provided)
311 ulong dev_get_driver_data(struct udevice *dev);
314 * dev_get_driver_ops() - get the device's driver's operations
316 * This checks that dev is not NULL, and returns the pointer to device's
317 * driver's operations.
319 * @dev: Device to check
320 * @return void pointer to driver's operations or NULL for NULL-dev or NULL-ops
322 const void *dev_get_driver_ops(struct udevice *dev);
325 * device_get_uclass_id() - return the uclass ID of a device
327 * @dev: Device to check
328 * @return uclass ID for the device
330 enum uclass_id device_get_uclass_id(struct udevice *dev);
333 * dev_get_uclass_name() - return the uclass name of a device
335 * This checks that dev is not NULL.
337 * @dev: Device to check
338 * @return pointer to the uclass name for the device
340 const char *dev_get_uclass_name(struct udevice *dev);
343 * device_get_child() - Get the child of a device by index
345 * Returns the numbered child, 0 being the first. This does not use
346 * sequence numbers, only the natural order.
348 * @dev: Parent device to check
349 * @index: Child index
350 * @devp: Returns pointer to device
351 * @return 0 if OK, -ENODEV if no such device, other error if the device fails
354 int device_get_child(struct udevice *parent, int index, struct udevice **devp);
357 * device_find_child_by_seq() - Find a child device based on a sequence
359 * This searches for a device with the given seq or req_seq.
361 * For seq, if an active device has this sequence it will be returned.
362 * If there is no such device then this will return -ENODEV.
364 * For req_seq, if a device (whether activated or not) has this req_seq
365 * value, that device will be returned. This is a strong indication that
366 * the device will receive that sequence when activated.
368 * @parent: Parent device
369 * @seq_or_req_seq: Sequence number to find (0=first)
370 * @find_req_seq: true to find req_seq, false to find seq
371 * @devp: Returns pointer to device (there is only one per for each seq).
372 * Set to NULL if none is found
373 * @return 0 if OK, -ve on error
375 int device_find_child_by_seq(struct udevice *parent, int seq_or_req_seq,
376 bool find_req_seq, struct udevice **devp);
379 * device_get_child_by_seq() - Get a child device based on a sequence
381 * If an active device has this sequence it will be returned. If there is no
382 * such device then this will check for a device that is requesting this
385 * The device is probed to activate it ready for use.
387 * @parent: Parent device
388 * @seq: Sequence number to find (0=first)
389 * @devp: Returns pointer to device (there is only one per for each seq)
390 * Set to NULL if none is found
391 * @return 0 if OK, -ve on error
393 int device_get_child_by_seq(struct udevice *parent, int seq,
394 struct udevice **devp);
397 * device_find_child_by_of_offset() - Find a child device based on FDT offset
399 * Locates a child device by its device tree offset.
401 * @parent: Parent device
402 * @of_offset: Device tree offset to find
403 * @devp: Returns pointer to device if found, otherwise this is set to NULL
404 * @return 0 if OK, -ve on error
406 int device_find_child_by_of_offset(struct udevice *parent, int of_offset,
407 struct udevice **devp);
410 * device_get_child_by_of_offset() - Get a child device based on FDT offset
412 * Locates a child device by its device tree offset.
414 * The device is probed to activate it ready for use.
416 * @parent: Parent device
417 * @of_offset: Device tree offset to find
418 * @devp: Returns pointer to device if found, otherwise this is set to NULL
419 * @return 0 if OK, -ve on error
421 int device_get_child_by_of_offset(struct udevice *parent, int of_offset,
422 struct udevice **devp);
425 * device_get_global_by_of_offset() - Get a device based on FDT offset
427 * Locates a device by its device tree offset, searching globally throughout
428 * the all driver model devices.
430 * The device is probed to activate it ready for use.
432 * @of_offset: Device tree offset to find
433 * @devp: Returns pointer to device if found, otherwise this is set to NULL
434 * @return 0 if OK, -ve on error
436 int device_get_global_by_of_offset(int of_offset, struct udevice **devp);
439 * device_find_first_child() - Find the first child of a device
441 * @parent: Parent device to search
442 * @devp: Returns first child device, or NULL if none
445 int device_find_first_child(struct udevice *parent, struct udevice **devp);
448 * device_find_next_child() - Find the next child of a device
450 * @devp: Pointer to previous child device on entry. Returns pointer to next
451 * child device, or NULL if none
454 int device_find_next_child(struct udevice **devp);
457 * dev_get_addr() - Get the reg property of a device
459 * @dev: Pointer to a device
463 fdt_addr_t dev_get_addr(struct udevice *dev);
466 * dev_get_addr_ptr() - Return pointer to the address of the reg property
469 * @dev: Pointer to a device
471 * @return Pointer to addr, or NULL if there is no such property
473 void *dev_get_addr_ptr(struct udevice *dev);
476 * dev_map_physmem() - Read device address from reg property of the
477 * device node and map the address into CPU address
480 * @dev: Pointer to device
481 * @size: size of the memory to map
483 * @return mapped address, or NULL if the device does not have reg
486 void *dev_map_physmem(struct udevice *dev, unsigned long size);
489 * dev_get_addr_index() - Get the indexed reg property of a device
491 * @dev: Pointer to a device
492 * @index: the 'reg' property can hold a list of <addr, size> pairs
493 * and @index is used to select which one is required
497 fdt_addr_t dev_get_addr_index(struct udevice *dev, int index);
500 * dev_get_addr_size_index() - Get the indexed reg property of a device
502 * Returns the address and size specified in the 'reg' property of a device.
504 * @dev: Pointer to a device
505 * @index: the 'reg' property can hold a list of <addr, size> pairs
506 * and @index is used to select which one is required
507 * @size: Pointer to size varible - this function returns the size
508 * specified in the 'reg' property here
512 fdt_addr_t dev_get_addr_size_index(struct udevice *dev, int index,
516 * dev_get_addr_name() - Get the reg property of a device, indexed by name
518 * @dev: Pointer to a device
519 * @name: the 'reg' property can hold a list of <addr, size> pairs, with the
520 * 'reg-names' property providing named-based identification. @index
521 * indicates the value to search for in 'reg-names'.
525 fdt_addr_t dev_get_addr_name(struct udevice *dev, const char *name);
528 * device_has_children() - check if a device has any children
530 * @dev: Device to check
531 * @return true if the device has one or more children
533 bool device_has_children(struct udevice *dev);
536 * device_has_active_children() - check if a device has any active children
538 * @dev: Device to check
539 * @return true if the device has one or more children and at least one of
540 * them is active (probed).
542 bool device_has_active_children(struct udevice *dev);
545 * device_is_last_sibling() - check if a device is the last sibling
547 * This function can be useful for display purposes, when special action needs
548 * to be taken when displaying the last sibling. This can happen when a tree
549 * view of devices is being displayed.
551 * @dev: Device to check
552 * @return true if there are no more siblings after this one - i.e. is it
555 bool device_is_last_sibling(struct udevice *dev);
558 * device_set_name() - set the name of a device
560 * This must be called in the device's bind() method and no later. Normally
561 * this is unnecessary but for probed devices which don't get a useful name
562 * this function can be helpful.
564 * The name is allocated and will be freed automatically when the device is
567 * @dev: Device to update
568 * @name: New name (this string is allocated new memory and attached to
570 * @return 0 if OK, -ENOMEM if there is not enough memory to allocate the
573 int device_set_name(struct udevice *dev, const char *name);
576 * device_set_name_alloced() - note that a device name is allocated
578 * This sets the DM_FLAG_NAME_ALLOCED flag for the device, so that when it is
579 * unbound the name will be freed. This avoids memory leaks.
581 * @dev: Device to update
583 void device_set_name_alloced(struct udevice *dev);
586 * of_device_is_compatible() - check if the device is compatible with the compat
588 * This allows to check whether the device is comaptible with the compat.
590 * @dev: udevice pointer for which compatible needs to be verified.
591 * @compat: Compatible string which needs to verified in the given
593 * @return true if OK, false if the compatible is not found
595 bool of_device_is_compatible(struct udevice *dev, const char *compat);
598 * of_machine_is_compatible() - check if the machine is compatible with
601 * This allows to check whether the machine is comaptible with the compat.
603 * @compat: Compatible string which needs to verified
604 * @return true if OK, false if the compatible is not found
606 bool of_machine_is_compatible(const char *compat);
609 * device_is_on_pci_bus - Test if a device is on a PCI bus
611 * @dev: device to test
612 * @return: true if it is on a PCI bus, false otherwise
614 static inline bool device_is_on_pci_bus(struct udevice *dev)
616 return device_get_uclass_id(dev->parent) == UCLASS_PCI;
620 * device_foreach_child_safe() - iterate through child devices safely
622 * This allows the @pos child to be removed in the loop if required.
624 * @pos: struct udevice * for the current device
625 * @next: struct udevice * for the next device
626 * @parent: parent device to scan
628 #define device_foreach_child_safe(pos, next, parent) \
629 list_for_each_entry_safe(pos, next, &parent->child_head, sibling_node)
632 * dm_scan_fdt_dev() - Bind child device in a the device tree
634 * This handles device which have sub-nodes in the device tree. It scans all
635 * sub-nodes and binds drivers for each node where a driver can be found.
637 * If this is called prior to relocation, only pre-relocation devices will be
638 * bound (those marked with u-boot,dm-pre-reloc in the device tree, or where
639 * the driver has the DM_FLAG_PRE_RELOC flag set). Otherwise, all devices will
642 * @dev: Device to scan
643 * @return 0 if OK, -ve on error
645 int dm_scan_fdt_dev(struct udevice *dev);
647 /* device resource management */
648 typedef void (*dr_release_t)(struct udevice *dev, void *res);
649 typedef int (*dr_match_t)(struct udevice *dev, void *res, void *match_data);
653 #ifdef CONFIG_DEBUG_DEVRES
654 void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp,
656 #define _devres_alloc(release, size, gfp) \
657 __devres_alloc(release, size, gfp, #release)
659 void *_devres_alloc(dr_release_t release, size_t size, gfp_t gfp);
663 * devres_alloc() - Allocate device resource data
664 * @release: Release function devres will be associated with
665 * @size: Allocation size
666 * @gfp: Allocation flags
668 * Allocate devres of @size bytes. The allocated area is associated
669 * with @release. The returned pointer can be passed to
670 * other devres_*() functions.
673 * Pointer to allocated devres on success, NULL on failure.
675 #define devres_alloc(release, size, gfp) \
676 _devres_alloc(release, size, gfp | __GFP_ZERO)
679 * devres_free() - Free device resource data
680 * @res: Pointer to devres data to free
682 * Free devres created with devres_alloc().
684 void devres_free(void *res);
687 * devres_add() - Register device resource
688 * @dev: Device to add resource to
689 * @res: Resource to register
691 * Register devres @res to @dev. @res should have been allocated
692 * using devres_alloc(). On driver detach, the associated release
693 * function will be invoked and devres will be freed automatically.
695 void devres_add(struct udevice *dev, void *res);
698 * devres_find() - Find device resource
699 * @dev: Device to lookup resource from
700 * @release: Look for resources associated with this release function
701 * @match: Match function (optional)
702 * @match_data: Data for the match function
704 * Find the latest devres of @dev which is associated with @release
705 * and for which @match returns 1. If @match is NULL, it's considered
708 * @return pointer to found devres, NULL if not found.
710 void *devres_find(struct udevice *dev, dr_release_t release,
711 dr_match_t match, void *match_data);
714 * devres_get() - Find devres, if non-existent, add one atomically
715 * @dev: Device to lookup or add devres for
716 * @new_res: Pointer to new initialized devres to add if not found
717 * @match: Match function (optional)
718 * @match_data: Data for the match function
720 * Find the latest devres of @dev which has the same release function
721 * as @new_res and for which @match return 1. If found, @new_res is
722 * freed; otherwise, @new_res is added atomically.
724 * @return ointer to found or added devres.
726 void *devres_get(struct udevice *dev, void *new_res,
727 dr_match_t match, void *match_data);
730 * devres_remove() - Find a device resource and remove it
731 * @dev: Device to find resource from
732 * @release: Look for resources associated with this release function
733 * @match: Match function (optional)
734 * @match_data: Data for the match function
736 * Find the latest devres of @dev associated with @release and for
737 * which @match returns 1. If @match is NULL, it's considered to
738 * match all. If found, the resource is removed atomically and
741 * @return ointer to removed devres on success, NULL if not found.
743 void *devres_remove(struct udevice *dev, dr_release_t release,
744 dr_match_t match, void *match_data);
747 * devres_destroy() - Find a device resource and destroy it
748 * @dev: Device to find resource from
749 * @release: Look for resources associated with this release function
750 * @match: Match function (optional)
751 * @match_data: Data for the match function
753 * Find the latest devres of @dev associated with @release and for
754 * which @match returns 1. If @match is NULL, it's considered to
755 * match all. If found, the resource is removed atomically and freed.
757 * Note that the release function for the resource will not be called,
758 * only the devres-allocated data will be freed. The caller becomes
759 * responsible for freeing any other data.
761 * @return 0 if devres is found and freed, -ENOENT if not found.
763 int devres_destroy(struct udevice *dev, dr_release_t release,
764 dr_match_t match, void *match_data);
767 * devres_release() - Find a device resource and destroy it, calling release
768 * @dev: Device to find resource from
769 * @release: Look for resources associated with this release function
770 * @match: Match function (optional)
771 * @match_data: Data for the match function
773 * Find the latest devres of @dev associated with @release and for
774 * which @match returns 1. If @match is NULL, it's considered to
775 * match all. If found, the resource is removed atomically, the
776 * release function called and the resource freed.
778 * @return 0 if devres is found and freed, -ENOENT if not found.
780 int devres_release(struct udevice *dev, dr_release_t release,
781 dr_match_t match, void *match_data);
783 /* managed devm_k.alloc/kfree for device drivers */
785 * devm_kmalloc() - Resource-managed kmalloc
786 * @dev: Device to allocate memory for
787 * @size: Allocation size
788 * @gfp: Allocation gfp flags
790 * Managed kmalloc. Memory allocated with this function is
791 * automatically freed on driver detach. Like all other devres
792 * resources, guaranteed alignment is unsigned long long.
794 * @return pointer to allocated memory on success, NULL on failure.
796 void *devm_kmalloc(struct udevice *dev, size_t size, gfp_t gfp);
797 static inline void *devm_kzalloc(struct udevice *dev, size_t size, gfp_t gfp)
799 return devm_kmalloc(dev, size, gfp | __GFP_ZERO);
801 static inline void *devm_kmalloc_array(struct udevice *dev,
802 size_t n, size_t size, gfp_t flags)
804 if (size != 0 && n > SIZE_MAX / size)
806 return devm_kmalloc(dev, n * size, flags);
808 static inline void *devm_kcalloc(struct udevice *dev,
809 size_t n, size_t size, gfp_t flags)
811 return devm_kmalloc_array(dev, n, size, flags | __GFP_ZERO);
815 * devm_kfree() - Resource-managed kfree
816 * @dev: Device this memory belongs to
817 * @ptr: Memory to free
819 * Free memory allocated with devm_kmalloc().
821 void devm_kfree(struct udevice *dev, void *ptr);
823 #else /* ! CONFIG_DEVRES */
825 static inline void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp)
827 return kzalloc(size, gfp);
830 static inline void devres_free(void *res)
835 static inline void devres_add(struct udevice *dev, void *res)
839 static inline void *devres_find(struct udevice *dev, dr_release_t release,
840 dr_match_t match, void *match_data)
845 static inline void *devres_get(struct udevice *dev, void *new_res,
846 dr_match_t match, void *match_data)
851 static inline void *devres_remove(struct udevice *dev, dr_release_t release,
852 dr_match_t match, void *match_data)
857 static inline int devres_destroy(struct udevice *dev, dr_release_t release,
858 dr_match_t match, void *match_data)
863 static inline int devres_release(struct udevice *dev, dr_release_t release,
864 dr_match_t match, void *match_data)
869 static inline void *devm_kmalloc(struct udevice *dev, size_t size, gfp_t gfp)
871 return kmalloc(size, gfp);
874 static inline void *devm_kzalloc(struct udevice *dev, size_t size, gfp_t gfp)
876 return kzalloc(size, gfp);
879 static inline void *devm_kmaloc_array(struct udevice *dev,
880 size_t n, size_t size, gfp_t flags)
882 /* TODO: add kmalloc_array() to linux/compat.h */
883 if (size != 0 && n > SIZE_MAX / size)
885 return kmalloc(n * size, flags);
888 static inline void *devm_kcalloc(struct udevice *dev,
889 size_t n, size_t size, gfp_t flags)
891 /* TODO: add kcalloc() to linux/compat.h */
892 return kmalloc(n * size, flags | __GFP_ZERO);
895 static inline void devm_kfree(struct udevice *dev, void *ptr)
900 #endif /* ! CONFIG_DEVRES */
903 * dm_set_translation_offset() - Set translation offset
904 * @offs: Translation offset
906 * Some platforms need a special address translation. Those
907 * platforms (e.g. mvebu in SPL) can configure a translation
908 * offset in the DM by calling this function. It will be
909 * added to all addresses returned in dev_get_addr().
911 void dm_set_translation_offset(fdt_addr_t offs);
914 * dm_get_translation_offset() - Get translation offset
916 * This function returns the translation offset that can
917 * be configured by calling dm_set_translation_offset().
919 * @return translation offset for the device address (0 as default).
921 fdt_addr_t dm_get_translation_offset(void);