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: if non-NULL, returns a pointer to the bound device
35 * @return 0 if OK, -ve on error
37 int device_bind(struct udevice *parent, const 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 * @pre_reloc_only: If true, bind the driver only if its DM_INIT_F flag is set.
49 * If false bind the driver always.
50 * @info: Name and platdata for this device
51 * @devp: if non-NULL, returns a pointer to the bound device
52 * @return 0 if OK, -ve on error
54 int device_bind_by_name(struct udevice *parent, bool pre_reloc_only,
55 const struct driver_info *info, struct udevice **devp);
58 * device_probe() - Probe a device, activating it
60 * Activate a device so that it is ready for use. All its parents are probed
63 * @dev: Pointer to device to probe
64 * @return 0 if OK, -ve on error
66 int device_probe(struct udevice *dev);
69 * device_probe() - Probe a child device, activating it
71 * Activate a device so that it is ready for use. All its parents are probed
72 * first. The child is provided with parent data if parent_priv is not NULL.
74 * @dev: Pointer to device to probe
75 * @parent_priv: Pointer to parent data. If non-NULL then this is provided to
77 * @return 0 if OK, -ve on error
79 int device_probe_child(struct udevice *dev, void *parent_priv);
82 * device_remove() - Remove a device, de-activating it
84 * De-activate a device so that it is no longer ready for use. All its
85 * children are deactivated first.
87 * @dev: Pointer to device to remove
88 * @return 0 if OK, -ve on error (an error here is normally a very bad thing)
90 #if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
91 int device_remove(struct udevice *dev);
93 static inline int device_remove(struct udevice *dev) { return 0; }
97 * device_unbind() - Unbind a device, destroying it
99 * Unbind a device and remove all memory used by it
101 * @dev: Pointer to device to unbind
102 * @return 0 if OK, -ve on error
104 #if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
105 int device_unbind(struct udevice *dev);
107 static inline int device_unbind(struct udevice *dev) { return 0; }
111 * device_remove_children() - Stop all device's children
112 * @dev: The device whose children are to be removed
113 * @return 0 on success, -ve on error
115 #if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
116 int device_remove_children(struct udevice *dev);
118 static inline int device_remove_children(struct udevice *dev) { return 0; }
122 * device_unbind_children() - Unbind all device's children from the device
124 * On error, the function continues to unbind all children, and reports the
127 * @dev: The device that is to be stripped of its children
128 * @return 0 on success, -ve on error
130 #if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
131 int device_unbind_children(struct udevice *dev);
133 static inline int device_unbind_children(struct udevice *dev) { return 0; }
136 #if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
137 void device_free(struct udevice *dev);
139 static inline void device_free(struct udevice *dev) {}
143 * simple_bus_translate() - translate a bus address to a system address
145 * This handles the 'ranges' property in a simple bus. It translates the
146 * device address @addr to a system address using this property.
148 * @dev: Simple bus device (parent of target device)
149 * @addr: Address to translate
150 * @return new address
152 fdt_addr_t simple_bus_translate(struct udevice *dev, fdt_addr_t addr);
154 /* Cast away any volatile pointer */
155 #define DM_ROOT_NON_CONST (((gd_t *)gd)->dm_root)
156 #define DM_UCLASS_ROOT_NON_CONST (((gd_t *)gd)->uclass_root)
158 /* device resource management */
162 * devres_release_probe - Release managed resources allocated after probing
163 * @dev: Device to release resources for
165 * Release all resources allocated for @dev when it was probed or later.
166 * This function is called on driver removal.
168 void devres_release_probe(struct udevice *dev);
171 * devres_release_all - Release all managed resources
172 * @dev: Device to release resources for
174 * Release all resources associated with @dev. This function is
175 * called on driver unbinding.
177 void devres_release_all(struct udevice *dev);
179 #else /* ! CONFIG_DEVRES */
181 static inline void devres_release_probe(struct udevice *dev)
185 static inline void devres_release_all(struct udevice *dev)
189 #endif /* ! CONFIG_DEVRES */