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_with_driver_data() - Create a device and bind it to a driver
44 * Called to set up a new device attached to a driver, in the case where the
45 * driver was matched to the device by means of a match table that provides
48 * Once bound a device exists but is not yet active until device_probe() is
51 * @parent: Pointer to device's parent, under which this driver will exist
52 * @drv: Device's driver
53 * @name: Name of device (e.g. device tree node name)
54 * @driver_data: The driver_data field from the driver's match table.
55 * @of_offset: Offset of device tree node for this device. This is -1 for
56 * devices which don't use device tree.
57 * @devp: if non-NULL, returns a pointer to the bound device
58 * @return 0 if OK, -ve on error
60 int device_bind_with_driver_data(struct udevice *parent,
61 const struct driver *drv, const char *name,
62 ulong driver_data, int of_offset,
63 struct udevice **devp);
66 * device_bind_by_name: Create a device and bind it to a driver
68 * This is a helper function used to bind devices which do not use device
71 * @parent: Pointer to device's parent
72 * @pre_reloc_only: If true, bind the driver only if its DM_INIT_F flag is set.
73 * If false bind the driver always.
74 * @info: Name and platdata for this device
75 * @devp: if non-NULL, returns a pointer to the bound device
76 * @return 0 if OK, -ve on error
78 int device_bind_by_name(struct udevice *parent, bool pre_reloc_only,
79 const struct driver_info *info, struct udevice **devp);
82 * device_probe() - Probe a device, activating it
84 * Activate a device so that it is ready for use. All its parents are probed
87 * @dev: Pointer to device to probe
88 * @return 0 if OK, -ve on error
90 int device_probe(struct udevice *dev);
93 * device_remove() - Remove a device, de-activating it
95 * De-activate a device so that it is no longer ready for use. All its
96 * children are deactivated first.
98 * @dev: Pointer to device to remove
99 * @return 0 if OK, -ve on error (an error here is normally a very bad thing)
101 #if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
102 int device_remove(struct udevice *dev);
104 static inline int device_remove(struct udevice *dev) { return 0; }
108 * device_unbind() - Unbind a device, destroying it
110 * Unbind a device and remove all memory used by it
112 * @dev: Pointer to device to unbind
113 * @return 0 if OK, -ve on error
115 #if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
116 int device_unbind(struct udevice *dev);
118 static inline int device_unbind(struct udevice *dev) { return 0; }
121 #if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
122 void device_free(struct udevice *dev);
124 static inline void device_free(struct udevice *dev) {}
128 * simple_bus_translate() - translate a bus address to a system address
130 * This handles the 'ranges' property in a simple bus. It translates the
131 * device address @addr to a system address using this property.
133 * @dev: Simple bus device (parent of target device)
134 * @addr: Address to translate
135 * @return new address
137 fdt_addr_t simple_bus_translate(struct udevice *dev, fdt_addr_t addr);
139 /* Cast away any volatile pointer */
140 #define DM_ROOT_NON_CONST (((gd_t *)gd)->dm_root)
141 #define DM_UCLASS_ROOT_NON_CONST (((gd_t *)gd)->uclass_root)
143 /* device resource management */
147 * devres_release_probe - Release managed resources allocated after probing
148 * @dev: Device to release resources for
150 * Release all resources allocated for @dev when it was probed or later.
151 * This function is called on driver removal.
153 void devres_release_probe(struct udevice *dev);
156 * devres_release_all - Release all managed resources
157 * @dev: Device to release resources for
159 * Release all resources associated with @dev. This function is
160 * called on driver unbinding.
162 void devres_release_all(struct udevice *dev);
164 #else /* ! CONFIG_DEVRES */
166 static inline void devres_release_probe(struct udevice *dev)
170 static inline void devres_release_all(struct udevice *dev)
174 #endif /* ! CONFIG_DEVRES */