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89876a55a6
In a very few cases we need to adjust the driver model root device, such as when setting it up at initialisation. Add a macro to make this easier. Signed-off-by: Simon Glass <sjg@chromium.org>
91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/*
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* Copyright (C) 2013 Google, Inc
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*
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* (C) Copyright 2012
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* Pavel Herrmann <morpheus.ibis@gmail.com>
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* Marek Vasut <marex@denx.de>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef _DM_DEVICE_INTERNAL_H
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#define _DM_DEVICE_INTERNAL_H
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struct udevice;
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/**
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* device_bind() - Create a device and bind it to a driver
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*
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* Called to set up a new device attached to a driver. The device will either
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* have platdata, or a device tree node which can be used to create the
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* platdata.
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*
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* Once bound a device exists but is not yet active until device_probe() is
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* called.
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*
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* @parent: Pointer to device's parent, under which this driver will exist
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* @drv: Device's driver
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* @name: Name of device (e.g. device tree node name)
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* @platdata: Pointer to data for this device - the structure is device-
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* specific but may include the device's I/O address, etc.. This is NULL for
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* devices which use device tree.
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* @of_offset: Offset of device tree node for this device. This is -1 for
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* devices which don't use device tree.
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* @devp: Returns a pointer to the bound device
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* @return 0 if OK, -ve on error
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*/
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int device_bind(struct udevice *parent, struct driver *drv,
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const char *name, void *platdata, int of_offset,
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struct udevice **devp);
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/**
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* device_bind_by_name: Create a device and bind it to a driver
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*
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* This is a helper function used to bind devices which do not use device
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* tree.
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*
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* @parent: Pointer to device's parent
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* @info: Name and platdata for this device
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* @devp: Returns a pointer to the bound device
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* @return 0 if OK, -ve on error
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*/
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int device_bind_by_name(struct udevice *parent, const struct driver_info *info,
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struct udevice **devp);
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/**
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* device_probe() - Probe a device, activating it
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*
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* Activate a device so that it is ready for use. All its parents are probed
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* first.
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*
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* @dev: Pointer to device to probe
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* @return 0 if OK, -ve on error
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*/
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int device_probe(struct udevice *dev);
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/**
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* device_remove() - Remove a device, de-activating it
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*
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* De-activate a device so that it is no longer ready for use. All its
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* children are deactivated first.
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*
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* @dev: Pointer to device to remove
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* @return 0 if OK, -ve on error (an error here is normally a very bad thing)
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*/
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int device_remove(struct udevice *dev);
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/**
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* device_unbind() - Unbind a device, destroying it
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*
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* Unbind a device and remove all memory used by it
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*
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* @dev: Pointer to device to unbind
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* @return 0 if OK, -ve on error
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*/
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int device_unbind(struct udevice *dev);
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/* Cast away any volatile pointer */
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#define DM_ROOT_NON_CONST (((gd_t *)gd)->dm_root)
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#define DM_UCLASS_ROOT_NON_CONST (((gd_t *)gd)->uclass_root)
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#endif
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