2 * Copyright (c) 2013 Google, Inc
5 * Marek Vasut <marex@denx.de>
7 * SPDX-License-Identifier: GPL-2.0+
12 #include <dm/device.h>
13 #include <dm/device-internal.h>
15 #include <dm/platdata.h>
16 #include <dm/uclass.h>
19 #include <linux/compiler.h>
21 struct driver *lists_driver_lookup_name(const char *name)
24 ll_entry_start(struct driver, driver);
25 const int n_ents = ll_entry_count(struct driver, driver);
28 for (entry = drv; entry != drv + n_ents; entry++) {
29 if (!strcmp(name, entry->name))
37 struct uclass_driver *lists_uclass_lookup(enum uclass_id id)
39 struct uclass_driver *uclass =
40 ll_entry_start(struct uclass_driver, uclass);
41 const int n_ents = ll_entry_count(struct uclass_driver, uclass);
42 struct uclass_driver *entry;
44 for (entry = uclass; entry != uclass + n_ents; entry++) {
52 int lists_bind_drivers(struct udevice *parent, bool pre_reloc_only)
54 struct driver_info *info =
55 ll_entry_start(struct driver_info, driver_info);
56 const int n_ents = ll_entry_count(struct driver_info, driver_info);
57 struct driver_info *entry;
62 for (entry = info; entry != info + n_ents; entry++) {
63 ret = device_bind_by_name(parent, pre_reloc_only, entry, &dev);
64 if (ret && ret != -EPERM) {
65 dm_warn("No match for driver '%s'\n", entry->name);
66 if (!result || ret != -ENOENT)
74 int device_bind_driver(struct udevice *parent, const char *drv_name,
75 const char *dev_name, struct udevice **devp)
77 return device_bind_driver_to_node(parent, drv_name, dev_name, -1, devp);
80 int device_bind_driver_to_node(struct udevice *parent, const char *drv_name,
81 const char *dev_name, int node,
82 struct udevice **devp)
87 drv = lists_driver_lookup_name(drv_name);
89 debug("Cannot find driver '%s'\n", drv_name);
92 ret = device_bind(parent, drv, dev_name, NULL, node, devp);
94 debug("Cannot create device named '%s' (err=%d)\n",
102 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
104 * driver_check_compatible() - Check if a driver matches a compatible string
106 * @param of_match: List of compatible strings to match
107 * @param of_idp: Returns the match that was found
108 * @param compat: The compatible string to search for
109 * @return 0 if there is a match, -ENOENT if no match
111 static int driver_check_compatible(const struct udevice_id *of_match,
112 const struct udevice_id **of_idp,
118 while (of_match->compatible) {
119 if (!strcmp(of_match->compatible, compat)) {
129 int lists_bind_fdt(struct udevice *parent, const void *blob, int offset,
130 struct udevice **devp)
132 struct driver *driver = ll_entry_start(struct driver, driver);
133 const int n_ents = ll_entry_count(struct driver, driver);
134 const struct udevice_id *id;
135 struct driver *entry;
138 const char *name, *compat_list, *compat;
139 int compat_length, i;
143 name = fdt_get_name(blob, offset, NULL);
144 dm_dbg("bind node %s\n", name);
148 compat_list = fdt_getprop(blob, offset, "compatible", &compat_length);
150 if (compat_length == -FDT_ERR_NOTFOUND) {
151 dm_dbg("Device '%s' has no compatible string\n", name);
155 dm_warn("Device tree error at offset %d\n", offset);
156 return compat_length;
160 * Walk through the compatible string list, attempting to match each
161 * compatible string in order such that we match in order of priority
162 * from the first string to the last.
164 for (i = 0; i < compat_length; i += strlen(compat) + 1) {
165 compat = compat_list + i;
166 dm_dbg(" - attempt to match compatible string '%s'\n",
169 for (entry = driver; entry != driver + n_ents; entry++) {
170 ret = driver_check_compatible(entry->of_match, &id,
175 if (entry == driver + n_ents)
178 dm_dbg(" - found match at '%s'\n", entry->name);
179 ret = device_bind_with_driver_data(parent, entry, name,
180 id->data, offset, &dev);
181 if (ret == -ENODEV) {
182 dm_dbg("Driver '%s' refuses to bind\n", entry->name);
186 dm_warn("Error binding driver '%s': %d\n", entry->name,
197 if (!found && !result && ret != -ENODEV)
198 dm_dbg("No match for node '%s'\n", name);