device-internal.h
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/*
* Copyright (C) 2013 Google, Inc
*
* (C) Copyright 2012
* Pavel Herrmann <morpheus.ibis@gmail.com>
* Marek Vasut <marex@denx.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _DM_DEVICE_INTERNAL_H
#define _DM_DEVICE_INTERNAL_H
struct udevice;
/**
* device_bind() - Create a device and bind it to a driver
*
* Called to set up a new device attached to a driver. The device will either
* have platdata, or a device tree node which can be used to create the
* platdata.
*
* Once bound a device exists but is not yet active until device_probe() is
* called.
*
* @parent: Pointer to device's parent, under which this driver will exist
* @drv: Device's driver
* @name: Name of device (e.g. device tree node name)
* @platdata: Pointer to data for this device - the structure is device-
* specific but may include the device's I/O address, etc.. This is NULL for
* devices which use device tree.
* @of_offset: Offset of device tree node for this device. This is -1 for
* devices which don't use device tree.
* @devp: Returns a pointer to the bound device
* @return 0 if OK, -ve on error
*/
int device_bind(struct udevice *parent, struct driver *drv,
const char *name, void *platdata, int of_offset,
struct udevice **devp);
/**
* device_bind_by_name: Create a device and bind it to a driver
*
* This is a helper function used to bind devices which do not use device
* tree.
*
* @parent: Pointer to device's parent
* @pre_reloc_only: If true, bind the driver only if its DM_INIT_F flag is set.
* If false bind the driver always.
* @info: Name and platdata for this device
* @devp: Returns a pointer to the bound device
* @return 0 if OK, -ve on error
*/
int device_bind_by_name(struct udevice *parent, bool pre_reloc_only,
const struct driver_info *info, struct udevice **devp);
/**
* device_probe() - Probe a device, activating it
*
* Activate a device so that it is ready for use. All its parents are probed
* first.
*
* @dev: Pointer to device to probe
* @return 0 if OK, -ve on error
*/
int device_probe(struct udevice *dev);
/**
* device_probe() - Probe a child device, activating it
*
* Activate a device so that it is ready for use. All its parents are probed
* first. The child is provided with parent data if parent_priv is not NULL.
*
* @dev: Pointer to device to probe
* @parent_priv: Pointer to parent data. If non-NULL then this is provided to
* the child.
* @return 0 if OK, -ve on error
*/
int device_probe_child(struct udevice *dev, void *parent_priv);
/**
* device_remove() - Remove a device, de-activating it
*
* De-activate a device so that it is no longer ready for use. All its
* children are deactivated first.
*
* @dev: Pointer to device to remove
* @return 0 if OK, -ve on error (an error here is normally a very bad thing)
*/
#ifdef CONFIG_DM_DEVICE_REMOVE
int device_remove(struct udevice *dev);
#else
static inline int device_remove(struct udevice *dev) { return 0; }
#endif
/**
* device_unbind() - Unbind a device, destroying it
*
* Unbind a device and remove all memory used by it
*
* @dev: Pointer to device to unbind
* @return 0 if OK, -ve on error
*/
#ifdef CONFIG_DM_DEVICE_REMOVE
int device_unbind(struct udevice *dev);
#else
static inline int device_unbind(struct udevice *dev) { return 0; }
#endif
#ifdef CONFIG_DM_DEVICE_REMOVE
void device_free(struct udevice *dev);
#else
static inline void device_free(struct udevice *dev) {}
#endif
/* Cast away any volatile pointer */
#define DM_ROOT_NON_CONST (((gd_t *)gd)->dm_root)
#define DM_UCLASS_ROOT_NON_CONST (((gd_t *)gd)->uclass_root)
#endif