summaryrefslogtreecommitdiff
path: root/include/dm/root.h
blob: 02c7788da0508077b8c720d13836ea4c476cc54b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
/*
 * Copyright (c) 2013 Google, Inc
 *
 * (C) Copyright 2012
 * Pavel Herrmann <morpheus.ibis@gmail.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#ifndef _DM_ROOT_H_
#define _DM_ROOT_H_

struct udevice;

/**
 * dm_root() - Return pointer to the top of the driver tree
 *
 * This function returns pointer to the root node of the driver tree,
 *
 * @return pointer to root device, or NULL if not inited yet
 */
struct udevice *dm_root(void);

/**
 * dm_scan_platdata() - Scan all platform data and bind drivers
 *
 * This scans all available platdata and creates drivers for each
 *
 * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC
 * flag. If false bind all drivers.
 * @return 0 if OK, -ve on error
 */
int dm_scan_platdata(bool pre_reloc_only);

/**
 * dm_scan_fdt() - Scan the device tree and bind drivers
 *
 * This scans the device tree and creates a driver for each node. Only
 * the top-level subnodes are examined.
 *
 * @blob: Pointer to device tree blob
 * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC
 * flag. If false bind all drivers.
 * @return 0 if OK, -ve on error
 */
int dm_scan_fdt(const void *blob, bool pre_reloc_only);

/**
 * dm_init_and_scan() - Initialise Driver Model structures and scan for devices
 *
 * This function initialises the roots of the driver tree and uclass trees,
 * then scans and binds available devices from platform data and the FDT.
 * This calls dm_init() to set up Driver Model structures.
 *
 * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC
 * flag. If false bind all drivers.
 * @return 0 if OK, -ve on error
 */
int dm_init_and_scan(bool pre_reloc_only);

/**
 * dm_init() - Initialise Driver Model structures
 *
 * This function will initialize roots of driver tree and class tree.
 * This needs to be called before anything uses the DM
 *
 * @return 0 if OK, -ve on error
 */
int dm_init(void);

/**
 * dm_uninit - Uninitialise Driver Model structures
 *
 * All devices will be removed and unbound
 * @return 0 if OK, -ve on error
 */
int dm_uninit(void);

#endif