mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-14 08:57:58 +00:00
89876a55a6
In a very few cases we need to adjust the driver model root device, such as when setting it up at initialisation. Add a macro to make this easier. Signed-off-by: Simon Glass <sjg@chromium.org>
103 lines
1.7 KiB
C
103 lines
1.7 KiB
C
/*
|
|
* 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/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, &root_info, &DM_ROOT_NON_CONST);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int dm_scan_platdata(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = lists_bind_drivers(DM_ROOT_NON_CONST);
|
|
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)
|
|
{
|
|
int offset = 0;
|
|
int ret = 0, err;
|
|
int depth = 0;
|
|
|
|
do {
|
|
offset = fdt_next_node(blob, offset, &depth);
|
|
if (offset > 0 && depth == 1) {
|
|
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
|
|
|
|
/* 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,
|
|
};
|