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 39 * 40 * @blob: Pointer to device tree blob 41 * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC 42 * flag. If false bind all drivers. 43 * @return 0 if OK, -ve on error 44 */ 45 int dm_scan_fdt(const void *blob, bool pre_reloc_only); 46 47 /** 48 * dm_init_and_scan() - Initialise Driver Model structures and scan for devices 49 * 50 * This function initialises the roots of the driver tree and uclass trees, 51 * then scans and binds available devices from platform data and the FDT. 52 * This calls dm_init() to set up Driver Model structures. 53 * 54 * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC 55 * flag. If false bind all drivers. 56 * @return 0 if OK, -ve on error 57 */ 58 int dm_init_and_scan(bool pre_reloc_only); 59 60 /** 61 * dm_init() - Initialise Driver Model structures 62 * 63 * This function will initialize roots of driver tree and class tree. 64 * This needs to be called before anything uses the DM 65 * 66 * @return 0 if OK, -ve on error 67 */ 68 int dm_init(void); 69 70 /** 71 * dm_uninit - Uninitialise Driver Model structures 72 * 73 * All devices will be removed and unbound 74 * @return 0 if OK, -ve on error 75 */ 76 int dm_uninit(void); 77 78 #endif 79