mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-06 19:26:16 +09:00
1ca7e2062b
At present only root nodes in the device tree are scanned for devices. But some devices can have children. For example a SPI bus may have several children for each of its chip selects. Add a function which scans subnodes and binds devices for each one. This can be used for the root node scan also, so change it. A device can call this function in its bind() or probe() methods to bind its children. Signed-off-by: Simon Glass <sjg@chromium.org>
96 lines
2.6 KiB
C
96 lines
2.6 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_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
|