LXR uboot/include/dm/root.h

   1/* SPDX-License-Identifier: GPL-2.0+ */
   2/*
   3 * Copyright (c) 2013 Google, Inc
   4 *
   5 * (C) Copyright 2012
   6 * Pavel Herrmann <morpheus.ibis@gmail.com>
   7 */
   8
   9#ifndef _DM_ROOT_H_
  10#define _DM_ROOT_H_
  11
  12struct udevice;
  13
  14/**
  15 * dm_root() - Return pointer to the top of the driver tree
  16 *
  17 * This function returns pointer to the root node of the driver tree,
  18 *
  19 * @return pointer to root device, or NULL if not inited yet
  20 */
  21struct udevice *dm_root(void);
  22
  23struct global_data;
  24/**
  25 * dm_fixup_for_gd_move() - Handle global_data moving to a new place
  26 *
  27 * The uclass list is part of global_data. Due to the way lists work, moving
  28 * the list will cause it to become invalid. This function fixes that up so
  29 * that the uclass list will work correctly.
  30 */
  31void dm_fixup_for_gd_move(struct global_data *new_gd);
  32
  33/**
  34 * dm_scan_platdata() - Scan all platform data and bind drivers
  35 *
  36 * This scans all available platdata and creates drivers for each
  37 *
  38 * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC
  39 * flag. If false bind all drivers.
  40 * @return 0 if OK, -ve on error
  41 */
  42int dm_scan_platdata(bool pre_reloc_only);
  43
  44/**
  45 * dm_scan_fdt() - Scan the device tree and bind drivers
  46 *
  47 * This scans the device tree and creates a driver for each node. Only
  48 * the top-level subnodes are examined.
  49 *
  50 * @blob: Pointer to device tree blob
  51 * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC
  52 * flag. If false bind all drivers.
  53 * @return 0 if OK, -ve on error
  54 */
  55int dm_scan_fdt(const void *blob, bool pre_reloc_only);
  56
  57/**
  58 * dm_extended_scan_fdt() - Scan the device tree and bind drivers
  59 *
  60 * This calls dm_scna_dft() which scans the device tree and creates a driver
  61 * for each node. the top-level subnodes are examined and also all sub-nodes
  62 * of "clocks" node.
  63 *
  64 * @blob: Pointer to device tree blob
  65 * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC
  66 * flag. If false bind all drivers.
  67 * @return 0 if OK, -ve on error
  68 */
  69int dm_extended_scan_fdt(const void *blob, bool pre_reloc_only);
  70
  71/**
  72 * dm_scan_other() - Scan for other devices
  73 *
  74 * Some devices may not be visible to Driver Model. This weak function can
  75 * be provided by boards which wish to create their own devices
  76 * programmaticaly. They should do this by calling device_bind() on each
  77 * device.
  78 *
  79 * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC
  80 * flag. If false bind all drivers.
  81 */
  82int dm_scan_other(bool pre_reloc_only);
  83
  84/**
  85 * dm_init_and_scan() - Initialise Driver Model structures and scan for devices
  86 *
  87 * This function initialises the roots of the driver tree and uclass trees,
  88 * then scans and binds available devices from platform data and the FDT.
  89 * This calls dm_init() to set up Driver Model structures.
  90 *
  91 * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC
  92 * flag. If false bind all drivers.
  93 * @return 0 if OK, -ve on error
  94 */
  95int dm_init_and_scan(bool pre_reloc_only);
  96
  97/**
  98 * dm_init() - Initialise Driver Model structures
  99 *
 100 * This function will initialize roots of driver tree and class tree.
 101 * This needs to be called before anything uses the DM
 102 *
 103 * @of_live:    Enable live device tree
 104 * @return 0 if OK, -ve on error
 105 */
 106int dm_init(bool of_live);
 107
 108/**
 109 * dm_uninit - Uninitialise Driver Model structures
 110 *
 111 * All devices will be removed and unbound
 112 * @return 0 if OK, -ve on error
 113 */
 114int dm_uninit(void);
 115
 116#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
 117/**
 118 * dm_remove_devices_flags - Call remove function of all drivers with
 119 *                           specific removal flags set to selectively
 120 *                           remove drivers
 121 *
 122 * All devices with the matching flags set will be removed
 123 *
 124 * @flags: Flags for selective device removal
 125 * @return 0 if OK, -ve on error
 126 */
 127int dm_remove_devices_flags(uint flags);
 128#else
 129static inline int dm_remove_devices_flags(uint flags) { return 0; }
 130#endif
 131
 132#endif
 133