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/*
* Copyright (c) 2013 Google, Inc
*
* (C) Copyright 2012
* Pavel Herrmann <morpheus.ibis@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <errno.h>
#include <malloc.h>
#include <libfdt.h>
#include <dm/device.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dm/platdata.h>
#include <dm/root.h>
#include <dm/uclass.h>
#include <dm/util.h>
#include <linux/list.h>
DECLARE_GLOBAL_DATA_PTR;
static const struct driver_info root_info = {
.name = "root_driver",
};
struct udevice *dm_root(void)
{
if (!gd->dm_root) {
dm_warn("Virtual root driver does not exist!\n");
return NULL;
}
return gd->dm_root;
}
int dm_init(void)
{
int ret;
if (gd->dm_root) {
dm_warn("Virtual root driver already exists!\n");
return -EINVAL;
}
INIT_LIST_HEAD(&DM_UCLASS_ROOT_NON_CONST);
ret = device_bind_by_name(NULL, false, &root_info, &DM_ROOT_NON_CONST);
if (ret)
return ret;
ret = device_probe(DM_ROOT_NON_CONST);
if (ret)
return ret;
return 0;
}
int dm_uninit(void)
{
device_remove(dm_root());
device_unbind(dm_root());
return 0;
}
int dm_scan_platdata(bool pre_reloc_only)
{
int ret;
ret = lists_bind_drivers(DM_ROOT_NON_CONST, pre_reloc_only);
if (ret == -ENOENT) {
dm_warn("Some drivers were not found\n");
ret = 0;
}
if (ret)
return ret;
return 0;
}
#ifdef CONFIG_OF_CONTROL
int dm_scan_fdt(const void *blob, bool pre_reloc_only)
{
int offset = 0;
int ret = 0, err;
int depth = 0;
do {
offset = fdt_next_node(blob, offset, &depth);
if (offset > 0 && depth == 1) {
if (pre_reloc_only &&
!fdt_getprop(blob, offset, "u-boot,dm-pre-reloc", NULL))
continue;
err = lists_bind_fdt(gd->dm_root, blob, offset);
if (err && !ret)
ret = err;
}
} while (offset > 0);
if (ret)
dm_warn("Some drivers failed to bind\n");
return ret;
}
#endif
int dm_init_and_scan(bool pre_reloc_only)
{
int ret;
ret = dm_init();
if (ret) {
debug("dm_init() failed: %d\n", ret);
return ret;
}
ret = dm_scan_platdata(pre_reloc_only);
if (ret) {
debug("dm_scan_platdata() failed: %d\n", ret);
return ret;
}
#ifdef CONFIG_OF_CONTROL
ret = dm_scan_fdt(gd->fdt_blob, pre_reloc_only);
if (ret) {
debug("dm_scan_fdt() failed: %d\n", ret);
return ret;
}
#endif
return 0;
}
/* This is the root driver - all drivers are children of this */
U_BOOT_DRIVER(root_driver) = {
.name = "root_driver",
.id = UCLASS_ROOT,
};
/* This is the root uclass */
UCLASS_DRIVER(root) = {
.name = "root",
.id = UCLASS_ROOT,
};
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