2 * Copyright (c) 2013 Google, Inc
7 * SPDX-License-Identifier: GPL-2.0+
15 #include <dm/device.h>
16 #include <dm/device-internal.h>
18 #include <dm/platdata.h>
20 #include <dm/uclass.h>
22 #include <linux/list.h>
24 DECLARE_GLOBAL_DATA_PTR;
26 static const struct driver_info root_info = {
27 .name = "root_driver",
30 struct udevice *dm_root(void)
33 dm_warn("Virtual root driver does not exist!\n");
40 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
41 void fix_drivers(void)
44 ll_entry_start(struct driver, driver);
45 const int n_ents = ll_entry_count(struct driver, driver);
48 for (entry = drv; entry != drv + n_ents; entry++) {
50 entry->of_match = (const struct udevice_id *)
51 ((u32)entry->of_match + gd->reloc_off);
53 entry->bind += gd->reloc_off;
55 entry->probe += gd->reloc_off;
57 entry->remove += gd->reloc_off;
59 entry->unbind += gd->reloc_off;
60 if (entry->ofdata_to_platdata)
61 entry->ofdata_to_platdata += gd->reloc_off;
62 if (entry->child_pre_probe)
63 entry->child_pre_probe += gd->reloc_off;
64 if (entry->child_post_remove)
65 entry->child_post_remove += gd->reloc_off;
66 /* OPS are fixed in every uclass post_probe function */
68 entry->ops += gd->reloc_off;
74 struct uclass_driver *uclass =
75 ll_entry_start(struct uclass_driver, uclass);
76 const int n_ents = ll_entry_count(struct uclass_driver, uclass);
77 struct uclass_driver *entry;
79 for (entry = uclass; entry != uclass + n_ents; entry++) {
81 entry->post_bind += gd->reloc_off;
82 if (entry->pre_unbind)
83 entry->pre_unbind += gd->reloc_off;
84 if (entry->post_probe)
85 entry->post_probe += gd->reloc_off;
86 if (entry->pre_remove)
87 entry->pre_remove += gd->reloc_off;
89 entry->init += gd->reloc_off;
91 entry->destroy += gd->reloc_off;
92 /* FIXME maybe also need to fix these ops */
94 entry->ops += gd->reloc_off;
104 dm_warn("Virtual root driver already exists!\n");
107 INIT_LIST_HEAD(&DM_UCLASS_ROOT_NON_CONST);
109 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
114 ret = device_bind_by_name(NULL, false, &root_info, &DM_ROOT_NON_CONST);
117 #if CONFIG_IS_ENABLED(OF_CONTROL)
118 DM_ROOT_NON_CONST->of_offset = 0;
120 ret = device_probe(DM_ROOT_NON_CONST);
129 device_remove(dm_root());
130 device_unbind(dm_root());
135 int dm_scan_platdata(bool pre_reloc_only)
139 ret = lists_bind_drivers(DM_ROOT_NON_CONST, pre_reloc_only);
140 if (ret == -ENOENT) {
141 dm_warn("Some drivers were not found\n");
148 #if CONFIG_IS_ENABLED(OF_CONTROL)
149 int dm_scan_fdt_node(struct udevice *parent, const void *blob, int offset,
154 for (offset = fdt_first_subnode(blob, offset);
156 offset = fdt_next_subnode(blob, offset)) {
157 if (pre_reloc_only &&
158 !fdt_getprop(blob, offset, "u-boot,dm-pre-reloc", NULL))
160 if (!fdtdec_get_is_enabled(blob, offset)) {
161 dm_dbg(" - ignoring disabled device\n");
164 err = lists_bind_fdt(parent, blob, offset, NULL);
170 dm_warn("Some drivers failed to bind\n");
175 int dm_scan_fdt(const void *blob, bool pre_reloc_only)
177 return dm_scan_fdt_node(gd->dm_root, blob, 0, pre_reloc_only);
181 __weak int dm_scan_other(bool pre_reloc_only)
186 int dm_init_and_scan(bool pre_reloc_only)
192 debug("dm_init() failed: %d\n", ret);
195 ret = dm_scan_platdata(pre_reloc_only);
197 debug("dm_scan_platdata() failed: %d\n", ret);
201 if (CONFIG_IS_ENABLED(OF_CONTROL)) {
202 ret = dm_scan_fdt(gd->fdt_blob, pre_reloc_only);
204 debug("dm_scan_fdt() failed: %d\n", ret);
209 ret = dm_scan_other(pre_reloc_only);
216 /* This is the root driver - all drivers are children of this */
217 U_BOOT_DRIVER(root_driver) = {
218 .name = "root_driver",
222 /* This is the root uclass */
223 UCLASS_DRIVER(root) = {