mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-16 16:23:14 +00:00
bb58503d80
Some boards will have devices which are not in the device tree and do not have platform data. They may be programnatically created, for example. Add a hook which boards can use to bind those devices early in boot. Signed-off-by: Simon Glass <sjg@chromium.org>
108 lines
3 KiB
C
108 lines
3 KiB
C
/*
|
|
* Copyright (c) 2013 Google, Inc
|
|
*
|
|
* (C) Copyright 2012
|
|
* Pavel Herrmann <morpheus.ibis@gmail.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#ifndef _DM_ROOT_H_
|
|
#define _DM_ROOT_H_
|
|
|
|
struct udevice;
|
|
|
|
/**
|
|
* dm_root() - Return pointer to the top of the driver tree
|
|
*
|
|
* This function returns pointer to the root node of the driver tree,
|
|
*
|
|
* @return pointer to root device, or NULL if not inited yet
|
|
*/
|
|
struct udevice *dm_root(void);
|
|
|
|
/**
|
|
* dm_scan_platdata() - Scan all platform data and bind drivers
|
|
*
|
|
* This scans all available platdata and creates drivers for each
|
|
*
|
|
* @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC
|
|
* flag. If false bind all drivers.
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int dm_scan_platdata(bool pre_reloc_only);
|
|
|
|
/**
|
|
* dm_scan_fdt() - Scan the device tree and bind drivers
|
|
*
|
|
* This scans the device tree and creates a driver for each node. Only
|
|
* the top-level subnodes are examined.
|
|
*
|
|
* @blob: Pointer to device tree blob
|
|
* @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC
|
|
* flag. If false bind all drivers.
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int dm_scan_fdt(const void *blob, bool pre_reloc_only);
|
|
|
|
/**
|
|
* dm_scan_fdt_node() - Scan the device tree and bind drivers for a node
|
|
*
|
|
* This scans the subnodes of a device tree node and and creates a driver
|
|
* for each one.
|
|
*
|
|
* @parent: Parent device for the devices that will be created
|
|
* @blob: Pointer to device tree blob
|
|
* @offset: Offset of node to scan
|
|
* @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC
|
|
* flag. If false bind all drivers.
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int dm_scan_fdt_node(struct udevice *parent, const void *blob, int offset,
|
|
bool pre_reloc_only);
|
|
|
|
/**
|
|
* dm_scan_other() - Scan for other devices
|
|
*
|
|
* Some devices may not be visible to Driver Model. This weak function can
|
|
* be provided by boards which wish to create their own devices
|
|
* programmaticaly. They should do this by calling device_bind() on each
|
|
* device.
|
|
*
|
|
* @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC
|
|
* flag. If false bind all drivers.
|
|
*/
|
|
int dm_scan_other(bool pre_reloc_only);
|
|
|
|
/**
|
|
* dm_init_and_scan() - Initialise Driver Model structures and scan for devices
|
|
*
|
|
* This function initialises the roots of the driver tree and uclass trees,
|
|
* then scans and binds available devices from platform data and the FDT.
|
|
* This calls dm_init() to set up Driver Model structures.
|
|
*
|
|
* @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC
|
|
* flag. If false bind all drivers.
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int dm_init_and_scan(bool pre_reloc_only);
|
|
|
|
/**
|
|
* dm_init() - Initialise Driver Model structures
|
|
*
|
|
* This function will initialize roots of driver tree and class tree.
|
|
* This needs to be called before anything uses the DM
|
|
*
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int dm_init(void);
|
|
|
|
/**
|
|
* dm_uninit - Uninitialise Driver Model structures
|
|
*
|
|
* All devices will be removed and unbound
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int dm_uninit(void);
|
|
|
|
#endif
|