16494d708SSimon Glass /* 26494d708SSimon Glass * Copyright (c) 2013 Google, Inc 36494d708SSimon Glass * 46494d708SSimon Glass * (C) Copyright 2012 56494d708SSimon Glass * Pavel Herrmann <morpheus.ibis@gmail.com> 66494d708SSimon Glass * 76494d708SSimon Glass * SPDX-License-Identifier: GPL-2.0+ 86494d708SSimon Glass */ 96494d708SSimon Glass 106494d708SSimon Glass #include <common.h> 116494d708SSimon Glass #include <errno.h> 126494d708SSimon Glass #include <malloc.h> 13*6a6d8fbeSSimon Glass #include <libfdt.h> 146494d708SSimon Glass #include <dm/device.h> 156494d708SSimon Glass #include <dm/device-internal.h> 166494d708SSimon Glass #include <dm/lists.h> 176494d708SSimon Glass #include <dm/platdata.h> 186494d708SSimon Glass #include <dm/uclass.h> 196494d708SSimon Glass #include <dm/util.h> 206494d708SSimon Glass #include <linux/list.h> 216494d708SSimon Glass 226494d708SSimon Glass DECLARE_GLOBAL_DATA_PTR; 236494d708SSimon Glass 246494d708SSimon Glass static const struct driver_info root_info = { 256494d708SSimon Glass .name = "root_driver", 266494d708SSimon Glass }; 276494d708SSimon Glass 2854c5d08aSHeiko Schocher struct udevice *dm_root(void) 296494d708SSimon Glass { 306494d708SSimon Glass if (!gd->dm_root) { 316494d708SSimon Glass dm_warn("Virtual root driver does not exist!\n"); 326494d708SSimon Glass return NULL; 336494d708SSimon Glass } 346494d708SSimon Glass 356494d708SSimon Glass return gd->dm_root; 366494d708SSimon Glass } 376494d708SSimon Glass 386494d708SSimon Glass int dm_init(void) 396494d708SSimon Glass { 406494d708SSimon Glass int ret; 416494d708SSimon Glass 426494d708SSimon Glass if (gd->dm_root) { 436494d708SSimon Glass dm_warn("Virtual root driver already exists!\n"); 446494d708SSimon Glass return -EINVAL; 456494d708SSimon Glass } 466494d708SSimon Glass INIT_LIST_HEAD(&gd->uclass_root); 476494d708SSimon Glass 486494d708SSimon Glass ret = device_bind_by_name(NULL, &root_info, &gd->dm_root); 496494d708SSimon Glass if (ret) 506494d708SSimon Glass return ret; 516494d708SSimon Glass 526494d708SSimon Glass return 0; 536494d708SSimon Glass } 546494d708SSimon Glass 556494d708SSimon Glass int dm_scan_platdata(void) 566494d708SSimon Glass { 576494d708SSimon Glass int ret; 586494d708SSimon Glass 596494d708SSimon Glass ret = lists_bind_drivers(gd->dm_root); 606494d708SSimon Glass if (ret == -ENOENT) { 616494d708SSimon Glass dm_warn("Some drivers were not found\n"); 626494d708SSimon Glass ret = 0; 636494d708SSimon Glass } 646494d708SSimon Glass if (ret) 656494d708SSimon Glass return ret; 666494d708SSimon Glass 676494d708SSimon Glass return 0; 686494d708SSimon Glass } 696494d708SSimon Glass 706494d708SSimon Glass #ifdef CONFIG_OF_CONTROL 716494d708SSimon Glass int dm_scan_fdt(const void *blob) 726494d708SSimon Glass { 736494d708SSimon Glass int offset = 0; 746494d708SSimon Glass int ret = 0, err; 756494d708SSimon Glass int depth = 0; 766494d708SSimon Glass 776494d708SSimon Glass do { 786494d708SSimon Glass offset = fdt_next_node(blob, offset, &depth); 796494d708SSimon Glass if (offset > 0 && depth == 1) { 806494d708SSimon Glass err = lists_bind_fdt(gd->dm_root, blob, offset); 816494d708SSimon Glass if (err && !ret) 826494d708SSimon Glass ret = err; 836494d708SSimon Glass } 846494d708SSimon Glass } while (offset > 0); 856494d708SSimon Glass 866494d708SSimon Glass if (ret) 876494d708SSimon Glass dm_warn("Some drivers failed to bind\n"); 886494d708SSimon Glass 896494d708SSimon Glass return ret; 906494d708SSimon Glass } 916494d708SSimon Glass #endif 926494d708SSimon Glass 936494d708SSimon Glass /* This is the root driver - all drivers are children of this */ 946494d708SSimon Glass U_BOOT_DRIVER(root_driver) = { 956494d708SSimon Glass .name = "root_driver", 966494d708SSimon Glass .id = UCLASS_ROOT, 976494d708SSimon Glass }; 986494d708SSimon Glass 996494d708SSimon Glass /* This is the root uclass */ 1006494d708SSimon Glass UCLASS_DRIVER(root) = { 1016494d708SSimon Glass .name = "root", 1026494d708SSimon Glass .id = UCLASS_ROOT, 1036494d708SSimon Glass }; 104