2 * Copyright (C) 2013 Google, Inc
5 * Pavel Herrmann <morpheus.ibis@gmail.com>
6 * Marek Vasut <marex@denx.de>
8 * SPDX-License-Identifier: GPL-2.0+
11 #ifndef _DM_DEVICE_INTERNAL_H
12 #define _DM_DEVICE_INTERNAL_H
17 * device_bind() - Create a device and bind it to a driver
19 * Called to set up a new device attached to a driver. The device will either
20 * have platdata, or a device tree node which can be used to create the
23 * Once bound a device exists but is not yet active until device_probe() is
26 * @parent: Pointer to device's parent, under which this driver will exist
27 * @drv: Device's driver
28 * @name: Name of device (e.g. device tree node name)
29 * @platdata: Pointer to data for this device - the structure is device-
30 * specific but may include the device's I/O address, etc.. This is NULL for
31 * devices which use device tree.
32 * @of_offset: Offset of device tree node for this device. This is -1 for
33 * devices which don't use device tree.
34 * @devp: Returns a pointer to the bound device
35 * @return 0 if OK, -ve on error
37 int device_bind(struct udevice *parent, struct driver *drv,
38 const char *name, void *platdata, int of_offset,
39 struct udevice **devp);
42 * device_bind_by_name: Create a device and bind it to a driver
44 * This is a helper function used to bind devices which do not use device
47 * @parent: Pointer to device's parent
48 * @info: Name and platdata for this device
49 * @devp: Returns a pointer to the bound device
50 * @return 0 if OK, -ve on error
52 int device_bind_by_name(struct udevice *parent, const struct driver_info *info,
53 struct udevice **devp);
56 * device_probe() - Probe a device, activating it
58 * Activate a device so that it is ready for use. All its parents are probed
61 * @dev: Pointer to device to probe
62 * @return 0 if OK, -ve on error
64 int device_probe(struct udevice *dev);
67 * device_remove() - Remove a device, de-activating it
69 * De-activate a device so that it is no longer ready for use. All its
70 * children are deactivated first.
72 * @dev: Pointer to device to remove
73 * @return 0 if OK, -ve on error (an error here is normally a very bad thing)
75 int device_remove(struct udevice *dev);
78 * device_unbind() - Unbind a device, destroying it
80 * Unbind a device and remove all memory used by it
82 * @dev: Pointer to device to unbind
83 * @return 0 if OK, -ve on error
85 int device_unbind(struct udevice *dev);
87 /* Cast away any volatile pointer */
88 #define DM_ROOT_NON_CONST (((gd_t *)gd)->dm_root)
89 #define DM_UCLASS_ROOT_NON_CONST (((gd_t *)gd)->uclass_root)