1 // SPDX-License-Identifier: GPL-2.0+
5 * Copyright (c) 2014 Google, Inc
8 * Pavel Herrmann <morpheus.ibis@gmail.com>
15 #include <dm/device.h>
16 #include <dm/device-internal.h>
17 #include <dm/uclass.h>
18 #include <dm/uclass-internal.h>
20 #include <power-domain.h>
22 int device_chld_unbind(struct udevice
*dev
, struct driver
*drv
)
24 struct udevice
*pos
, *n
;
25 int ret
, saved_ret
= 0;
29 list_for_each_entry_safe(pos
, n
, &dev
->child_head
, sibling_node
) {
30 if (drv
&& (pos
->driver
!= drv
))
33 ret
= device_unbind(pos
);
34 if (ret
&& !saved_ret
) {
35 log_warning("device '%s' failed to unbind\n",
41 return log_ret(saved_ret
);
44 int device_chld_remove(struct udevice
*dev
, struct driver
*drv
,
47 struct udevice
*pos
, *n
;
52 list_for_each_entry_safe(pos
, n
, &dev
->child_head
, sibling_node
) {
53 if (drv
&& (pos
->driver
!= drv
))
56 ret
= device_remove(pos
, flags
);
64 int device_unbind(struct udevice
*dev
)
66 const struct driver
*drv
;
70 return log_msg_ret("dev", -EINVAL
);
72 if (dev_get_flags(dev
) & DM_FLAG_ACTIVATED
)
73 return log_msg_ret("active", -EINVAL
);
75 if (!(dev_get_flags(dev
) & DM_FLAG_BOUND
))
76 return log_msg_ret("not-bound", -EINVAL
);
82 ret
= drv
->unbind(dev
);
84 return log_msg_ret("unbind", ret
);
87 ret
= device_chld_unbind(dev
, NULL
);
89 return log_msg_ret("child unbind", ret
);
91 if (dev_get_flags(dev
) & DM_FLAG_ALLOC_PDATA
) {
92 free(dev_get_plat(dev
));
93 dev_set_plat(dev
, NULL
);
95 if (dev_get_flags(dev
) & DM_FLAG_ALLOC_UCLASS_PDATA
) {
96 free(dev_get_uclass_plat(dev
));
97 dev_set_uclass_plat(dev
, NULL
);
99 if (dev_get_flags(dev
) & DM_FLAG_ALLOC_PARENT_PDATA
) {
100 free(dev_get_parent_plat(dev
));
101 dev_set_parent_plat(dev
, NULL
);
103 ret
= uclass_unbind_device(dev
);
105 return log_msg_ret("uc", ret
);
108 list_del(&dev
->sibling_node
);
110 devres_release_all(dev
);
112 if (dev_get_flags(dev
) & DM_FLAG_NAME_ALLOCED
)
113 free((char *)dev
->name
);
120 * device_free() - Free memory buffers allocated by a device
121 * @dev: Device that is to be started
123 void device_free(struct udevice
*dev
)
127 if (dev
->driver
->priv_auto
) {
128 free(dev_get_priv(dev
));
129 dev_set_priv(dev
, NULL
);
131 size
= dev
->uclass
->uc_drv
->per_device_auto
;
133 free(dev_get_uclass_priv(dev
));
134 dev_set_uclass_priv(dev
, NULL
);
137 size
= dev
->parent
->driver
->per_child_auto
;
139 size
= dev
->parent
->uclass
->uc_drv
->
143 free(dev_get_parent_priv(dev
));
144 dev_set_parent_priv(dev
, NULL
);
147 dev_bic_flags(dev
, DM_FLAG_PLATDATA_VALID
);
149 devres_release_probe(dev
);
152 static bool flags_remove(uint flags
, uint drv_flags
)
154 if ((flags
& DM_REMOVE_NORMAL
) ||
155 (flags
&& (drv_flags
& (DM_FLAG_ACTIVE_DMA
| DM_FLAG_OS_PREPARE
))))
161 int device_remove(struct udevice
*dev
, uint flags
)
163 const struct driver
*drv
;
169 if (!(dev_get_flags(dev
) & DM_FLAG_ACTIVATED
))
175 ret
= uclass_pre_remove_device(dev
);
179 ret
= device_chld_remove(dev
, NULL
, flags
);
184 * Remove the device if called with the "normal" remove flag set,
185 * or if the remove flag matches any of the drivers remove flags
187 if (drv
->remove
&& flags_remove(flags
, drv
->flags
)) {
188 ret
= drv
->remove(dev
);
193 if (dev
->parent
&& dev
->parent
->driver
->child_post_remove
) {
194 ret
= dev
->parent
->driver
->child_post_remove(dev
);
196 dm_warn("%s: Device '%s' failed child_post_remove()",
197 __func__
, dev
->name
);
201 if (!(flags
& DM_REMOVE_NO_PD
) &&
203 (DM_FLAG_DEFAULT_PD_CTRL_OFF
| DM_FLAG_REMOVE_WITH_PD_ON
)) &&
204 dev
!= gd
->cur_serial_dev
)
205 dev_power_domain_off(dev
);
207 if (flags_remove(flags
, drv
->flags
)) {
210 dev_bic_flags(dev
, DM_FLAG_ACTIVATED
);
216 /* We can't put the children back */
217 dm_warn("%s: Device '%s' failed to remove, but children are gone\n",
218 __func__
, dev
->name
);
220 ret
= uclass_post_probe_device(dev
);
222 dm_warn("%s: Device '%s' failed to post_probe on error path\n",
223 __func__
, dev
->name
);