lists.c
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/*
* Copyright (c) 2013 Google, Inc
*
* (C) Copyright 2012
* Marek Vasut <marex@denx.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <errno.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;
int len;
if (!drv || !n_ents)
return NULL;
len = strlen(name);
for (entry = drv; entry != drv + n_ents; entry++) {
if (strncmp(name, entry->name, len))
continue;
/* Full match */
if (len == strlen(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;
if ((id == UCLASS_INVALID) || !uclass)
return NULL;
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;
}
#ifdef CONFIG_OF_CONTROL
/**
* driver_check_compatible() - Check if a driver is compatible with this node
*
* @param blob: Device tree pointer
* @param offset: Offset of node in device tree
* @param of_matchL List of compatible strings to match
* @return 0 if there is a match, -ENOENT if no match, -ENODEV if the node
* does not have a compatible string, other error <0 if there is a device
* tree error
*/
static int driver_check_compatible(const void *blob, int offset,
const struct udevice_id *of_match)
{
int ret;
if (!of_match)
return -ENOENT;
while (of_match->compatible) {
ret = fdt_node_check_compatible(blob, offset,
of_match->compatible);
if (!ret)
return 0;
else if (ret == -FDT_ERR_NOTFOUND)
return -ENODEV;
else if (ret < 0)
return -EINVAL;
of_match++;
}
return -ENOENT;
}
int lists_bind_fdt(struct udevice *parent, const void *blob, int offset,
struct udevice **devp)
{
struct driver *driver = ll_entry_start(struct driver, driver);
const int n_ents = ll_entry_count(struct driver, driver);
struct driver *entry;
struct udevice *dev;
bool found = false;
const char *name;
int result = 0;
int ret = 0;
dm_dbg("bind node %s\n", fdt_get_name(blob, offset, NULL));
if (devp)
*devp = NULL;
for (entry = driver; entry != driver + n_ents; entry++) {
ret = driver_check_compatible(blob, offset, entry->of_match);
name = fdt_get_name(blob, offset, NULL);
if (ret == -ENOENT) {
continue;
} else if (ret == -ENODEV) {
dm_dbg("Device '%s' has no compatible string\n", name);
break;
} else if (ret) {
dm_warn("Device tree error at offset %d\n", offset);
if (!result || ret != -ENOENT)
result = ret;
break;
}
dm_dbg(" - found match at '%s'\n", entry->name);
ret = device_bind(parent, entry, name, NULL, offset, &dev);
if (ret) {
dm_warn("Error binding driver '%s'\n", entry->name);
return ret;
} else {
found = true;
if (devp)
*devp = dev;
}
break;
}
if (!found && !result && ret != -ENODEV) {
dm_dbg("No match for node '%s'\n",
fdt_get_name(blob, offset, NULL));
}
return result;
}
#endif