1 /* 2 * Copyright (c) 2013 Google, Inc 3 * 4 * (C) Copyright 2012 5 * Pavel Herrmann <morpheus.ibis@gmail.com> 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #ifndef _DM_ROOT_H_ 11 #define _DM_ROOT_H_ 12 13 struct udevice; 14 15 /** 16 * dm_root() - Return pointer to the top of the driver tree 17 * 18 * This function returns pointer to the root node of the driver tree, 19 * 20 * @return pointer to root device, or NULL if not inited yet 21 */ 22 struct udevice *dm_root(void); 23 24 /** 25 * dm_scan_platdata() - Scan all platform data and bind drivers 26 * 27 * This scans all available platdata and creates drivers for each 28 * 29 * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC 30 * flag. If false bind all drivers. 31 * @return 0 if OK, -ve on error 32 */ 33 int dm_scan_platdata(bool pre_reloc_only); 34 35 /** 36 * dm_scan_fdt() - Scan the device tree and bind drivers 37 * 38 * This scans the device tree and creates a driver for each node. Only 39 * the top-level subnodes are examined. 40 * 41 * @blob: Pointer to device tree blob 42 * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC 43 * flag. If false bind all drivers. 44 * @return 0 if OK, -ve on error 45 */ 46 int dm_scan_fdt(const void *blob, bool pre_reloc_only); 47 48 /** 49 * dm_scan_fdt_node() - Scan the device tree and bind drivers for a node 50 * 51 * This scans the subnodes of a device tree node and and creates a driver 52 * for each one. 53 * 54 * @parent: Parent device for the devices that will be created 55 * @blob: Pointer to device tree blob 56 * @offset: Offset of node to scan 57 * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC 58 * flag. If false bind all drivers. 59 * @return 0 if OK, -ve on error 60 */ 61 int dm_scan_fdt_node(struct udevice *parent, const void *blob, int offset, 62 bool pre_reloc_only); 63 64 /** 65 * dm_scan_other() - Scan for other devices 66 * 67 * Some devices may not be visible to Driver Model. This weak function can 68 * be provided by boards which wish to create their own devices 69 * programmaticaly. They should do this by calling device_bind() on each 70 * device. 71 * 72 * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC 73 * flag. If false bind all drivers. 74 */ 75 int dm_scan_other(bool pre_reloc_only); 76 77 /** 78 * dm_init_and_scan() - Initialise Driver Model structures and scan for devices 79 * 80 * This function initialises the roots of the driver tree and uclass trees, 81 * then scans and binds available devices from platform data and the FDT. 82 * This calls dm_init() to set up Driver Model structures. 83 * 84 * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC 85 * flag. If false bind all drivers. 86 * @return 0 if OK, -ve on error 87 */ 88 int dm_init_and_scan(bool pre_reloc_only); 89 90 /** 91 * dm_init() - Initialise Driver Model structures 92 * 93 * This function will initialize roots of driver tree and class tree. 94 * This needs to be called before anything uses the DM 95 * 96 * @return 0 if OK, -ve on error 97 */ 98 int dm_init(void); 99 100 /** 101 * dm_uninit - Uninitialise Driver Model structures 102 * 103 * All devices will be removed and unbound 104 * @return 0 if OK, -ve on error 105 */ 106 int dm_uninit(void); 107 108 #endif 109