1 /* 2 * libfdt - Flat Device Tree manipulation 3 * Tests that fdt_next_subnode() works as expected 4 * 5 * Copyright (C) 2013 Google, Inc 6 * 7 * Copyright (C) 2007 David Gibson, IBM Corporation. 8 * 9 * This library is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU Lesser General Public License 11 * as published by the Free Software Foundation; either version 2.1 of 12 * the License, or (at your option) any later version. 13 * 14 * This library is distributed in the hope that it will be useful, but 15 * WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * Lesser General Public License for more details. 18 * 19 * You should have received a copy of the GNU Lesser General Public 20 * License along with this library; if not, write to the Free Software 21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 22 */ 23 24 #include <stdlib.h> 25 #include <stdio.h> 26 #include <string.h> 27 #include <stdint.h> 28 29 #include <libfdt.h> 30 31 #include "tests.h" 32 #include "testdata.h" 33 34 static void test_node(void *fdt, int parent_offset) 35 { 36 fdt32_t subnodes; 37 const fdt32_t *prop; 38 int offset; 39 int count; 40 int len; 41 42 /* This property indicates the number of subnodes to expect */ 43 prop = fdt_getprop(fdt, parent_offset, "subnodes", &len); 44 if (!prop || len != sizeof(fdt32_t)) { 45 FAIL("Missing/invalid subnodes property at '%s'", 46 fdt_get_name(fdt, parent_offset, NULL)); 47 } 48 subnodes = cpu_to_fdt32(*prop); 49 50 count = 0; 51 fdt_for_each_subnode(offset, fdt, parent_offset) 52 count++; 53 54 if (count != subnodes) { 55 FAIL("Node '%s': Expected %d subnodes, got %d\n", 56 fdt_get_name(fdt, parent_offset, NULL), subnodes, 57 count); 58 } 59 } 60 61 static void check_fdt_next_subnode(void *fdt) 62 { 63 int offset; 64 int count = 0; 65 66 fdt_for_each_subnode(offset, fdt, 0) { 67 test_node(fdt, offset); 68 count++; 69 } 70 71 if (count != 2) 72 FAIL("Expected %d tests, got %d\n", 2, count); 73 } 74 75 int main(int argc, char *argv[]) 76 { 77 void *fdt; 78 79 test_init(argc, argv); 80 if (argc != 2) 81 CONFIG("Usage: %s <dtb file>", argv[0]); 82 83 fdt = load_blob(argv[1]); 84 if (!fdt) 85 FAIL("No device tree available"); 86 87 check_fdt_next_subnode(fdt); 88 89 PASS(); 90 } 91
