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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2013 Google, Inc
*
* (C) Copyright 2012
* Marek Vasut <marex@denx.de>
*/
#define LOG_CATEGORY LOGC_DM
#include <common.h>
#include <errno.h>
#include <log.h>
#include <dm/device.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dm/platdata.h>
#include <dm/uclass.h>
#include <dm/util.h>
#include <fdtdec.h>
#include <linux/compiler.h>
struct driver *lists_driver_lookup_name(const char *name)
{
struct driver *drv =
ll_entry_start(struct driver, driver);
const int n_ents = ll_entry_count(struct driver, driver);
struct driver *entry;
for (entry = drv; entry != drv + n_ents; entry++) {
if (!strcmp(name, entry->name))
return entry;
}
/* Not found */
return NULL;
}
struct uclass_driver *lists_uclass_lookup(enum uclass_id id)
{
struct uclass_driver *uclass =
ll_entry_start(struct uclass_driver, uclass);
const int n_ents = ll_entry_count(struct uclass_driver, uclass);
struct uclass_driver *entry;
for (entry = uclass; entry != uclass + n_ents; entry++) {
if (entry->id == id)
return entry;
}
return NULL;
}
int lists_bind_drivers(struct udevice *parent, bool pre_reloc_only)
{
struct driver_info *info =
ll_entry_start(struct driver_info, driver_info);
const int n_ents = ll_entry_count(struct driver_info, driver_info);
struct driver_info *entry;
struct udevice *dev;
int result = 0;
int ret;
for (entry = info; entry != info + n_ents; entry++) {
ret = device_bind_by_name(parent, pre_reloc_only, entry, &dev);
if (ret && ret != -EPERM) {
dm_warn("No match for driver '%s'\n", entry->name);
if (!result || ret != -ENOENT)
result = ret;
}
}
return result;
}
int device_bind_driver(struct udevice *parent, const char *drv_name,
const char *dev_name, struct udevice **devp)
{
return device_bind_driver_to_node(parent, drv_name, dev_name,
ofnode_null(), devp);
}
int device_bind_driver_to_node(struct udevice *parent, const char *drv_name,
const char *dev_name, ofnode node,
struct udevice **devp)
{
struct driver *drv;
int ret;
drv = lists_driver_lookup_name(drv_name);
if (!drv) {
debug("Cannot find driver '%s'\n", drv_name);
return -ENOENT;
}
ret = device_bind_with_driver_data(parent, drv, dev_name, 0 /* data */,
node, devp);
return ret;
}
#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
/**
* driver_check_compatible() - Check if a driver matches a compatible string
*
* @param of_match: List of compatible strings to match
* @param of_idp: Returns the match that was found
* @param compat: The compatible string to search for
* @return 0 if there is a match, -ENOENT if no match
*/
static int driver_check_compatible(const struct udevice_id *of_match,
const struct udevice_id **of_idp,
const char *compat)
{
if (!of_match)
return -ENOENT;
while (of_match->compatible) {
if (!strcmp(of_match->compatible, compat)) {
*of_idp = of_match;
return 0;
}
of_match++;
}
return -ENOENT;
}
int lists_bind_fdt(struct udevice *parent, ofnode node, struct udevice **devp,
bool pre_reloc_only)
{
struct driver *driver = ll_entry_start(struct driver, driver);
const int n_ents = ll_entry_count(struct driver, driver);
const struct udevice_id *id;
struct driver *entry;
struct udevice *dev;
bool found = false;
const char *name, *compat_list, *compat;
int compat_length, i;
int result = 0;
int ret = 0;
if (devp)
*devp = NULL;
name = ofnode_get_name(node);
log_debug("bind node %s\n", name);
compat_list = ofnode_get_property(node, "compatible", &compat_length);
if (!compat_list) {
if (compat_length == -FDT_ERR_NOTFOUND) {
log_debug("Device '%s' has no compatible string\n",
name);
return 0;
}
dm_warn("Device tree error at node '%s'\n", name);
return compat_length;
}
/*
* Walk through the compatible string list, attempting to match each
* compatible string in order such that we match in order of priority
* from the first string to the last.
*/
for (i = 0; i < compat_length; i += strlen(compat) + 1) {
compat = compat_list + i;
log_debug(" - attempt to match compatible string '%s'\n",
compat);
for (entry = driver; entry != driver + n_ents; entry++) {
ret = driver_check_compatible(entry->of_match, &id,
compat);
if (!ret)
break;
}
if (entry == driver + n_ents)
continue;
if (pre_reloc_only) {
if (!ofnode_pre_reloc(node) &&
!(entry->flags & DM_FLAG_PRE_RELOC)) {
log_debug("Skipping device pre-relocation\n");
return 0;
}
}
log_debug(" - found match at '%s': '%s' matches '%s'\n",
entry->name, entry->of_match->compatible,
id->compatible);
ret = device_bind_with_driver_data(parent, entry, name,
id->data, node, &dev);
if (ret == -ENODEV) {
log_debug("Driver '%s' refuses to bind\n", entry->name);
continue;
}
if (ret) {
dm_warn("Error binding driver '%s': %d\n", entry->name,
ret);
return ret;
} else {
found = true;
if (devp)
*devp = dev;
}
break;
}
if (!found && !result && ret != -ENODEV)
log_debug("No match for node '%s'\n", name);
return result;
}
#endif
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