1 // SPDX-License-Identifier: GPL-2.0+
5 * Copyright (c) 2014 Google, Inc
8 * Pavel Herrmann <morpheus.ibis@gmail.com>
14 #include <dm/device.h>
15 #include <dm/device-internal.h>
16 #include <dm/uclass.h>
17 #include <dm/uclass-internal.h>
20 int device_chld_unbind(struct udevice *dev, struct driver *drv)
22 struct udevice *pos, *n;
23 int ret, saved_ret = 0;
27 list_for_each_entry_safe(pos, n, &dev->child_head, sibling_node) {
28 if (drv && (pos->driver != drv))
31 ret = device_unbind(pos);
32 if (ret && !saved_ret)
39 int device_chld_remove(struct udevice *dev, struct driver *drv,
42 struct udevice *pos, *n;
47 list_for_each_entry_safe(pos, n, &dev->child_head, sibling_node) {
48 if (drv && (pos->driver != drv))
51 ret = device_remove(pos, flags);
59 int device_unbind(struct udevice *dev)
61 const struct driver *drv;
67 if (dev->flags & DM_FLAG_ACTIVATED)
70 if (!(dev->flags & DM_FLAG_BOUND))
77 ret = drv->unbind(dev);
82 ret = device_chld_unbind(dev, NULL);
86 if (dev->flags & DM_FLAG_ALLOC_PDATA) {
90 if (dev->flags & DM_FLAG_ALLOC_UCLASS_PDATA) {
91 free(dev->uclass_platdata);
92 dev->uclass_platdata = NULL;
94 if (dev->flags & DM_FLAG_ALLOC_PARENT_PDATA) {
95 free(dev->parent_platdata);
96 dev->parent_platdata = NULL;
98 ret = uclass_unbind_device(dev);
103 list_del(&dev->sibling_node);
105 devres_release_all(dev);
107 if (dev->flags & DM_FLAG_NAME_ALLOCED)
108 free((char *)dev->name);
115 * device_free() - Free memory buffers allocated by a device
116 * @dev: Device that is to be started
118 void device_free(struct udevice *dev)
122 if (dev->driver->priv_auto_alloc_size) {
126 size = dev->uclass->uc_drv->per_device_auto_alloc_size;
128 free(dev->uclass_priv);
129 dev->uclass_priv = NULL;
132 size = dev->parent->driver->per_child_auto_alloc_size;
134 size = dev->parent->uclass->uc_drv->
135 per_child_auto_alloc_size;
138 free(dev->parent_priv);
139 dev->parent_priv = NULL;
143 devres_release_probe(dev);
146 static bool flags_remove(uint flags, uint drv_flags)
148 if ((flags & DM_REMOVE_NORMAL) ||
149 (flags & (drv_flags & (DM_FLAG_ACTIVE_DMA | DM_FLAG_OS_PREPARE))))
155 int device_remove(struct udevice *dev, uint flags)
157 const struct driver *drv;
163 if (!(dev->flags & DM_FLAG_ACTIVATED))
169 ret = uclass_pre_remove_device(dev);
173 ret = device_chld_remove(dev, NULL, flags);
178 * Remove the device if called with the "normal" remove flag set,
179 * or if the remove flag matches any of the drivers remove flags
181 if (drv->remove && flags_remove(flags, drv->flags)) {
182 ret = drv->remove(dev);
187 if (dev->parent && dev->parent->driver->child_post_remove) {
188 ret = dev->parent->driver->child_post_remove(dev);
190 dm_warn("%s: Device '%s' failed child_post_remove()",
191 __func__, dev->name);
195 if (flags_remove(flags, drv->flags)) {
199 dev->flags &= ~DM_FLAG_ACTIVATED;
205 /* We can't put the children back */
206 dm_warn("%s: Device '%s' failed to remove, but children are gone\n",
207 __func__, dev->name);
209 ret = uclass_post_probe_device(dev);
211 dm_warn("%s: Device '%s' failed to post_probe on error path\n",
212 __func__, dev->name);