xref: /openbmc/u-boot/common/fdt_support.c (revision f4d8de48f5a2aa1885daa0d425b8c0568a2ccb69)
1 /*
2  * (C) Copyright 2007
3  * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
4  *
5  * Copyright 2010-2011 Freescale Semiconductor, Inc.
6  *
7  * SPDX-License-Identifier:	GPL-2.0+
8  */
9 
10 #include <common.h>
11 #include <stdio_dev.h>
12 #include <linux/ctype.h>
13 #include <linux/types.h>
14 #include <asm/global_data.h>
15 #include <libfdt.h>
16 #include <fdt_support.h>
17 #include <exports.h>
18 
19 /*
20  * Global data (for the gd->bd)
21  */
22 DECLARE_GLOBAL_DATA_PTR;
23 
24 /**
25  * fdt_getprop_u32_default - Find a node and return it's property or a default
26  *
27  * @fdt: ptr to device tree
28  * @path: path of node
29  * @prop: property name
30  * @dflt: default value if the property isn't found
31  *
32  * Convenience function to find a node and return it's property or a
33  * default value if it doesn't exist.
34  */
35 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
36 				const char *prop, const u32 dflt)
37 {
38 	const fdt32_t *val;
39 	int off;
40 
41 	off = fdt_path_offset(fdt, path);
42 	if (off < 0)
43 		return dflt;
44 
45 	val = fdt_getprop(fdt, off, prop, NULL);
46 	if (val)
47 		return fdt32_to_cpu(*val);
48 	else
49 		return dflt;
50 }
51 
52 /**
53  * fdt_find_and_setprop: Find a node and set it's property
54  *
55  * @fdt: ptr to device tree
56  * @node: path of node
57  * @prop: property name
58  * @val: ptr to new value
59  * @len: length of new property value
60  * @create: flag to create the property if it doesn't exist
61  *
62  * Convenience function to directly set a property given the path to the node.
63  */
64 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
65 			 const void *val, int len, int create)
66 {
67 	int nodeoff = fdt_path_offset(fdt, node);
68 
69 	if (nodeoff < 0)
70 		return nodeoff;
71 
72 	if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
73 		return 0; /* create flag not set; so exit quietly */
74 
75 	return fdt_setprop(fdt, nodeoff, prop, val, len);
76 }
77 
78 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
79 
80 #ifdef CONFIG_CONS_INDEX
81 static void fdt_fill_multisername(char *sername, size_t maxlen)
82 {
83 	const char *outname = stdio_devices[stdout]->name;
84 
85 	if (strcmp(outname, "serial") > 0)
86 		strncpy(sername, outname, maxlen);
87 
88 	/* eserial? */
89 	if (strcmp(outname + 1, "serial") > 0)
90 		strncpy(sername, outname + 1, maxlen);
91 }
92 #endif
93 
94 static int fdt_fixup_stdout(void *fdt, int chosenoff)
95 {
96 	int err = 0;
97 #ifdef CONFIG_CONS_INDEX
98 	int node;
99 	char sername[9] = { 0 };
100 	const char *path;
101 
102 	fdt_fill_multisername(sername, sizeof(sername) - 1);
103 	if (!sername[0])
104 		sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
105 
106 	err = node = fdt_path_offset(fdt, "/aliases");
107 	if (node >= 0) {
108 		int len;
109 		path = fdt_getprop(fdt, node, sername, &len);
110 		if (path) {
111 			char *p = malloc(len);
112 			err = -FDT_ERR_NOSPACE;
113 			if (p) {
114 				memcpy(p, path, len);
115 				err = fdt_setprop(fdt, chosenoff,
116 					"linux,stdout-path", p, len);
117 				free(p);
118 			}
119 		} else {
120 			err = len;
121 		}
122 	}
123 #endif
124 	if (err < 0)
125 		printf("WARNING: could not set linux,stdout-path %s.\n",
126 				fdt_strerror(err));
127 
128 	return err;
129 }
130 #endif
131 
132 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force)
133 {
134 	int   nodeoffset;
135 	int   err, j, total;
136 	fdt32_t  tmp;
137 	const char *path;
138 	uint64_t addr, size;
139 
140 	/* Find the "chosen" node.  */
141 	nodeoffset = fdt_path_offset (fdt, "/chosen");
142 
143 	/* If there is no "chosen" node in the blob return */
144 	if (nodeoffset < 0) {
145 		printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset));
146 		return nodeoffset;
147 	}
148 
149 	/* just return if initrd_start/end aren't valid */
150 	if ((initrd_start == 0) || (initrd_end == 0))
151 		return 0;
152 
153 	total = fdt_num_mem_rsv(fdt);
154 
155 	/*
156 	 * Look for an existing entry and update it.  If we don't find
157 	 * the entry, we will j be the next available slot.
158 	 */
159 	for (j = 0; j < total; j++) {
160 		err = fdt_get_mem_rsv(fdt, j, &addr, &size);
161 		if (addr == initrd_start) {
162 			fdt_del_mem_rsv(fdt, j);
163 			break;
164 		}
165 	}
166 
167 	err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
168 	if (err < 0) {
169 		printf("fdt_initrd: %s\n", fdt_strerror(err));
170 		return err;
171 	}
172 
173 	path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL);
174 	if ((path == NULL) || force) {
175 		tmp = cpu_to_fdt32(initrd_start);
176 		err = fdt_setprop(fdt, nodeoffset,
177 			"linux,initrd-start", &tmp, sizeof(tmp));
178 		if (err < 0) {
179 			printf("WARNING: "
180 				"could not set linux,initrd-start %s.\n",
181 				fdt_strerror(err));
182 			return err;
183 		}
184 		tmp = cpu_to_fdt32(initrd_end);
185 		err = fdt_setprop(fdt, nodeoffset,
186 			"linux,initrd-end", &tmp, sizeof(tmp));
187 		if (err < 0) {
188 			printf("WARNING: could not set linux,initrd-end %s.\n",
189 				fdt_strerror(err));
190 
191 			return err;
192 		}
193 	}
194 
195 	return 0;
196 }
197 
198 int fdt_chosen(void *fdt, int force)
199 {
200 	int   nodeoffset;
201 	int   err;
202 	char  *str;		/* used to set string properties */
203 	const char *path;
204 
205 	err = fdt_check_header(fdt);
206 	if (err < 0) {
207 		printf("fdt_chosen: %s\n", fdt_strerror(err));
208 		return err;
209 	}
210 
211 	/*
212 	 * Find the "chosen" node.
213 	 */
214 	nodeoffset = fdt_path_offset (fdt, "/chosen");
215 
216 	/*
217 	 * If there is no "chosen" node in the blob, create it.
218 	 */
219 	if (nodeoffset < 0) {
220 		/*
221 		 * Create a new node "/chosen" (offset 0 is root level)
222 		 */
223 		nodeoffset = fdt_add_subnode(fdt, 0, "chosen");
224 		if (nodeoffset < 0) {
225 			printf("WARNING: could not create /chosen %s.\n",
226 				fdt_strerror(nodeoffset));
227 			return nodeoffset;
228 		}
229 	}
230 
231 	/*
232 	 * Create /chosen properites that don't exist in the fdt.
233 	 * If the property exists, update it only if the "force" parameter
234 	 * is true.
235 	 */
236 	str = getenv("bootargs");
237 	if (str != NULL) {
238 		path = fdt_getprop(fdt, nodeoffset, "bootargs", NULL);
239 		if ((path == NULL) || force) {
240 			err = fdt_setprop(fdt, nodeoffset,
241 				"bootargs", str, strlen(str)+1);
242 			if (err < 0)
243 				printf("WARNING: could not set bootargs %s.\n",
244 					fdt_strerror(err));
245 		}
246 	}
247 
248 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
249 	path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
250 	if ((path == NULL) || force)
251 		err = fdt_fixup_stdout(fdt, nodeoffset);
252 #endif
253 
254 #ifdef OF_STDOUT_PATH
255 	path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
256 	if ((path == NULL) || force) {
257 		err = fdt_setprop(fdt, nodeoffset,
258 			"linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1);
259 		if (err < 0)
260 			printf("WARNING: could not set linux,stdout-path %s.\n",
261 				fdt_strerror(err));
262 	}
263 #endif
264 
265 	return err;
266 }
267 
268 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
269 		      const void *val, int len, int create)
270 {
271 #if defined(DEBUG)
272 	int i;
273 	debug("Updating property '%s/%s' = ", path, prop);
274 	for (i = 0; i < len; i++)
275 		debug(" %.2x", *(u8*)(val+i));
276 	debug("\n");
277 #endif
278 	int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
279 	if (rc)
280 		printf("Unable to update property %s:%s, err=%s\n",
281 			path, prop, fdt_strerror(rc));
282 }
283 
284 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
285 			  u32 val, int create)
286 {
287 	fdt32_t tmp = cpu_to_fdt32(val);
288 	do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
289 }
290 
291 void do_fixup_by_prop(void *fdt,
292 		      const char *pname, const void *pval, int plen,
293 		      const char *prop, const void *val, int len,
294 		      int create)
295 {
296 	int off;
297 #if defined(DEBUG)
298 	int i;
299 	debug("Updating property '%s' = ", prop);
300 	for (i = 0; i < len; i++)
301 		debug(" %.2x", *(u8*)(val+i));
302 	debug("\n");
303 #endif
304 	off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
305 	while (off != -FDT_ERR_NOTFOUND) {
306 		if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
307 			fdt_setprop(fdt, off, prop, val, len);
308 		off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
309 	}
310 }
311 
312 void do_fixup_by_prop_u32(void *fdt,
313 			  const char *pname, const void *pval, int plen,
314 			  const char *prop, u32 val, int create)
315 {
316 	fdt32_t tmp = cpu_to_fdt32(val);
317 	do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
318 }
319 
320 void do_fixup_by_compat(void *fdt, const char *compat,
321 			const char *prop, const void *val, int len, int create)
322 {
323 	int off = -1;
324 #if defined(DEBUG)
325 	int i;
326 	debug("Updating property '%s' = ", prop);
327 	for (i = 0; i < len; i++)
328 		debug(" %.2x", *(u8*)(val+i));
329 	debug("\n");
330 #endif
331 	off = fdt_node_offset_by_compatible(fdt, -1, compat);
332 	while (off != -FDT_ERR_NOTFOUND) {
333 		if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
334 			fdt_setprop(fdt, off, prop, val, len);
335 		off = fdt_node_offset_by_compatible(fdt, off, compat);
336 	}
337 }
338 
339 void do_fixup_by_compat_u32(void *fdt, const char *compat,
340 			    const char *prop, u32 val, int create)
341 {
342 	fdt32_t tmp = cpu_to_fdt32(val);
343 	do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
344 }
345 
346 /*
347  * Get cells len in bytes
348  *     if #NNNN-cells property is 2 then len is 8
349  *     otherwise len is 4
350  */
351 static int get_cells_len(void *blob, char *nr_cells_name)
352 {
353 	const fdt32_t *cell;
354 
355 	cell = fdt_getprop(blob, 0, nr_cells_name, NULL);
356 	if (cell && fdt32_to_cpu(*cell) == 2)
357 		return 8;
358 
359 	return 4;
360 }
361 
362 /*
363  * Write a 4 or 8 byte big endian cell
364  */
365 static void write_cell(u8 *addr, u64 val, int size)
366 {
367 	int shift = (size - 1) * 8;
368 	while (size-- > 0) {
369 		*addr++ = (val >> shift) & 0xff;
370 		shift -= 8;
371 	}
372 }
373 
374 #ifdef CONFIG_NR_DRAM_BANKS
375 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
376 #else
377 #define MEMORY_BANKS_MAX 4
378 #endif
379 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
380 {
381 	int err, nodeoffset;
382 	int addr_cell_len, size_cell_len, len;
383 	u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
384 	int bank;
385 
386 	if (banks > MEMORY_BANKS_MAX) {
387 		printf("%s: num banks %d exceeds hardcoded limit %d."
388 		       " Recompile with higher MEMORY_BANKS_MAX?\n",
389 		       __FUNCTION__, banks, MEMORY_BANKS_MAX);
390 		return -1;
391 	}
392 
393 	err = fdt_check_header(blob);
394 	if (err < 0) {
395 		printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
396 		return err;
397 	}
398 
399 	/* update, or add and update /memory node */
400 	nodeoffset = fdt_path_offset(blob, "/memory");
401 	if (nodeoffset < 0) {
402 		nodeoffset = fdt_add_subnode(blob, 0, "memory");
403 		if (nodeoffset < 0) {
404 			printf("WARNING: could not create /memory: %s.\n",
405 					fdt_strerror(nodeoffset));
406 			return nodeoffset;
407 		}
408 	}
409 	err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
410 			sizeof("memory"));
411 	if (err < 0) {
412 		printf("WARNING: could not set %s %s.\n", "device_type",
413 				fdt_strerror(err));
414 		return err;
415 	}
416 
417 	addr_cell_len = get_cells_len(blob, "#address-cells");
418 	size_cell_len = get_cells_len(blob, "#size-cells");
419 
420 	for (bank = 0, len = 0; bank < banks; bank++) {
421 		write_cell(tmp + len, start[bank], addr_cell_len);
422 		len += addr_cell_len;
423 
424 		write_cell(tmp + len, size[bank], size_cell_len);
425 		len += size_cell_len;
426 	}
427 
428 	err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
429 	if (err < 0) {
430 		printf("WARNING: could not set %s %s.\n",
431 				"reg", fdt_strerror(err));
432 		return err;
433 	}
434 	return 0;
435 }
436 
437 int fdt_fixup_memory(void *blob, u64 start, u64 size)
438 {
439 	return fdt_fixup_memory_banks(blob, &start, &size, 1);
440 }
441 
442 void fdt_fixup_ethernet(void *fdt)
443 {
444 	int node, i, j;
445 	char enet[16], *tmp, *end;
446 	char mac[16];
447 	const char *path;
448 	unsigned char mac_addr[6];
449 
450 	node = fdt_path_offset(fdt, "/aliases");
451 	if (node < 0)
452 		return;
453 
454 	i = 0;
455 	strcpy(mac, "ethaddr");
456 	while ((tmp = getenv(mac)) != NULL) {
457 		sprintf(enet, "ethernet%d", i);
458 		path = fdt_getprop(fdt, node, enet, NULL);
459 		if (!path) {
460 			debug("No alias for %s\n", enet);
461 			sprintf(mac, "eth%daddr", ++i);
462 			continue;
463 		}
464 
465 		for (j = 0; j < 6; j++) {
466 			mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
467 			if (tmp)
468 				tmp = (*end) ? end+1 : end;
469 		}
470 
471 		do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
472 		do_fixup_by_path(fdt, path, "local-mac-address",
473 				&mac_addr, 6, 1);
474 
475 		sprintf(mac, "eth%daddr", ++i);
476 	}
477 }
478 
479 /* Resize the fdt to its actual size + a bit of padding */
480 int fdt_resize(void *blob)
481 {
482 	int i;
483 	uint64_t addr, size;
484 	int total, ret;
485 	uint actualsize;
486 
487 	if (!blob)
488 		return 0;
489 
490 	total = fdt_num_mem_rsv(blob);
491 	for (i = 0; i < total; i++) {
492 		fdt_get_mem_rsv(blob, i, &addr, &size);
493 		if (addr == (uintptr_t)blob) {
494 			fdt_del_mem_rsv(blob, i);
495 			break;
496 		}
497 	}
498 
499 	/*
500 	 * Calculate the actual size of the fdt
501 	 * plus the size needed for 5 fdt_add_mem_rsv, one
502 	 * for the fdt itself and 4 for a possible initrd
503 	 * ((initrd-start + initrd-end) * 2 (name & value))
504 	 */
505 	actualsize = fdt_off_dt_strings(blob) +
506 		fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
507 
508 	/* Make it so the fdt ends on a page boundary */
509 	actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
510 	actualsize = actualsize - ((uintptr_t)blob & 0xfff);
511 
512 	/* Change the fdt header to reflect the correct size */
513 	fdt_set_totalsize(blob, actualsize);
514 
515 	/* Add the new reservation */
516 	ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
517 	if (ret < 0)
518 		return ret;
519 
520 	return actualsize;
521 }
522 
523 #ifdef CONFIG_PCI
524 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
525 
526 #define FDT_PCI_PREFETCH	(0x40000000)
527 #define FDT_PCI_MEM32		(0x02000000)
528 #define FDT_PCI_IO		(0x01000000)
529 #define FDT_PCI_MEM64		(0x03000000)
530 
531 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
532 
533 	int addrcell, sizecell, len, r;
534 	u32 *dma_range;
535 	/* sized based on pci addr cells, size-cells, & address-cells */
536 	u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
537 
538 	addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
539 	sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
540 
541 	dma_range = &dma_ranges[0];
542 	for (r = 0; r < hose->region_count; r++) {
543 		u64 bus_start, phys_start, size;
544 
545 		/* skip if !PCI_REGION_SYS_MEMORY */
546 		if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
547 			continue;
548 
549 		bus_start = (u64)hose->regions[r].bus_start;
550 		phys_start = (u64)hose->regions[r].phys_start;
551 		size = (u64)hose->regions[r].size;
552 
553 		dma_range[0] = 0;
554 		if (size >= 0x100000000ull)
555 			dma_range[0] |= FDT_PCI_MEM64;
556 		else
557 			dma_range[0] |= FDT_PCI_MEM32;
558 		if (hose->regions[r].flags & PCI_REGION_PREFETCH)
559 			dma_range[0] |= FDT_PCI_PREFETCH;
560 #ifdef CONFIG_SYS_PCI_64BIT
561 		dma_range[1] = bus_start >> 32;
562 #else
563 		dma_range[1] = 0;
564 #endif
565 		dma_range[2] = bus_start & 0xffffffff;
566 
567 		if (addrcell == 2) {
568 			dma_range[3] = phys_start >> 32;
569 			dma_range[4] = phys_start & 0xffffffff;
570 		} else {
571 			dma_range[3] = phys_start & 0xffffffff;
572 		}
573 
574 		if (sizecell == 2) {
575 			dma_range[3 + addrcell + 0] = size >> 32;
576 			dma_range[3 + addrcell + 1] = size & 0xffffffff;
577 		} else {
578 			dma_range[3 + addrcell + 0] = size & 0xffffffff;
579 		}
580 
581 		dma_range += (3 + addrcell + sizecell);
582 	}
583 
584 	len = dma_range - &dma_ranges[0];
585 	if (len)
586 		fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
587 
588 	return 0;
589 }
590 #endif
591 
592 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
593 /*
594  * Provide a weak default function to return the flash bank size.
595  * There might be multiple non-identical flash chips connected to one
596  * chip-select, so we need to pass an index as well.
597  */
598 u32 __flash_get_bank_size(int cs, int idx)
599 {
600 	extern flash_info_t flash_info[];
601 
602 	/*
603 	 * As default, a simple 1:1 mapping is provided. Boards with
604 	 * a different mapping need to supply a board specific mapping
605 	 * routine.
606 	 */
607 	return flash_info[cs].size;
608 }
609 u32 flash_get_bank_size(int cs, int idx)
610 	__attribute__((weak, alias("__flash_get_bank_size")));
611 
612 /*
613  * This function can be used to update the size in the "reg" property
614  * of all NOR FLASH device nodes. This is necessary for boards with
615  * non-fixed NOR FLASH sizes.
616  */
617 int fdt_fixup_nor_flash_size(void *blob)
618 {
619 	char compat[][16] = { "cfi-flash", "jedec-flash" };
620 	int off;
621 	int len;
622 	struct fdt_property *prop;
623 	u32 *reg, *reg2;
624 	int i;
625 
626 	for (i = 0; i < 2; i++) {
627 		off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
628 		while (off != -FDT_ERR_NOTFOUND) {
629 			int idx;
630 
631 			/*
632 			 * Found one compatible node, so fixup the size
633 			 * int its reg properties
634 			 */
635 			prop = fdt_get_property_w(blob, off, "reg", &len);
636 			if (prop) {
637 				int tuple_size = 3 * sizeof(reg);
638 
639 				/*
640 				 * There might be multiple reg-tuples,
641 				 * so loop through them all
642 				 */
643 				reg = reg2 = (u32 *)&prop->data[0];
644 				for (idx = 0; idx < (len / tuple_size); idx++) {
645 					/*
646 					 * Update size in reg property
647 					 */
648 					reg[2] = flash_get_bank_size(reg[0],
649 								     idx);
650 
651 					/*
652 					 * Point to next reg tuple
653 					 */
654 					reg += 3;
655 				}
656 
657 				fdt_setprop(blob, off, "reg", reg2, len);
658 			}
659 
660 			/* Move to next compatible node */
661 			off = fdt_node_offset_by_compatible(blob, off,
662 							    compat[i]);
663 		}
664 	}
665 
666 	return 0;
667 }
668 #endif
669 
670 int fdt_increase_size(void *fdt, int add_len)
671 {
672 	int newlen;
673 
674 	newlen = fdt_totalsize(fdt) + add_len;
675 
676 	/* Open in place with a new len */
677 	return fdt_open_into(fdt, fdt, newlen);
678 }
679 
680 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
681 #include <jffs2/load_kernel.h>
682 #include <mtd_node.h>
683 
684 struct reg_cell {
685 	unsigned int r0;
686 	unsigned int r1;
687 };
688 
689 int fdt_del_subnodes(const void *blob, int parent_offset)
690 {
691 	int off, ndepth;
692 	int ret;
693 
694 	for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
695 	     (off >= 0) && (ndepth > 0);
696 	     off = fdt_next_node(blob, off, &ndepth)) {
697 		if (ndepth == 1) {
698 			debug("delete %s: offset: %x\n",
699 				fdt_get_name(blob, off, 0), off);
700 			ret = fdt_del_node((void *)blob, off);
701 			if (ret < 0) {
702 				printf("Can't delete node: %s\n",
703 					fdt_strerror(ret));
704 				return ret;
705 			} else {
706 				ndepth = 0;
707 				off = parent_offset;
708 			}
709 		}
710 	}
711 	return 0;
712 }
713 
714 int fdt_del_partitions(void *blob, int parent_offset)
715 {
716 	const void *prop;
717 	int ndepth = 0;
718 	int off;
719 	int ret;
720 
721 	off = fdt_next_node(blob, parent_offset, &ndepth);
722 	if (off > 0 && ndepth == 1) {
723 		prop = fdt_getprop(blob, off, "label", NULL);
724 		if (prop == NULL) {
725 			/*
726 			 * Could not find label property, nand {}; node?
727 			 * Check subnode, delete partitions there if any.
728 			 */
729 			return fdt_del_partitions(blob, off);
730 		} else {
731 			ret = fdt_del_subnodes(blob, parent_offset);
732 			if (ret < 0) {
733 				printf("Can't remove subnodes: %s\n",
734 					fdt_strerror(ret));
735 				return ret;
736 			}
737 		}
738 	}
739 	return 0;
740 }
741 
742 int fdt_node_set_part_info(void *blob, int parent_offset,
743 			   struct mtd_device *dev)
744 {
745 	struct list_head *pentry;
746 	struct part_info *part;
747 	struct reg_cell cell;
748 	int off, ndepth = 0;
749 	int part_num, ret;
750 	char buf[64];
751 
752 	ret = fdt_del_partitions(blob, parent_offset);
753 	if (ret < 0)
754 		return ret;
755 
756 	/*
757 	 * Check if it is nand {}; subnode, adjust
758 	 * the offset in this case
759 	 */
760 	off = fdt_next_node(blob, parent_offset, &ndepth);
761 	if (off > 0 && ndepth == 1)
762 		parent_offset = off;
763 
764 	part_num = 0;
765 	list_for_each_prev(pentry, &dev->parts) {
766 		int newoff;
767 
768 		part = list_entry(pentry, struct part_info, link);
769 
770 		debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
771 			part_num, part->name, part->size,
772 			part->offset, part->mask_flags);
773 
774 		sprintf(buf, "partition@%llx", part->offset);
775 add_sub:
776 		ret = fdt_add_subnode(blob, parent_offset, buf);
777 		if (ret == -FDT_ERR_NOSPACE) {
778 			ret = fdt_increase_size(blob, 512);
779 			if (!ret)
780 				goto add_sub;
781 			else
782 				goto err_size;
783 		} else if (ret < 0) {
784 			printf("Can't add partition node: %s\n",
785 				fdt_strerror(ret));
786 			return ret;
787 		}
788 		newoff = ret;
789 
790 		/* Check MTD_WRITEABLE_CMD flag */
791 		if (part->mask_flags & 1) {
792 add_ro:
793 			ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
794 			if (ret == -FDT_ERR_NOSPACE) {
795 				ret = fdt_increase_size(blob, 512);
796 				if (!ret)
797 					goto add_ro;
798 				else
799 					goto err_size;
800 			} else if (ret < 0)
801 				goto err_prop;
802 		}
803 
804 		cell.r0 = cpu_to_fdt32(part->offset);
805 		cell.r1 = cpu_to_fdt32(part->size);
806 add_reg:
807 		ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
808 		if (ret == -FDT_ERR_NOSPACE) {
809 			ret = fdt_increase_size(blob, 512);
810 			if (!ret)
811 				goto add_reg;
812 			else
813 				goto err_size;
814 		} else if (ret < 0)
815 			goto err_prop;
816 
817 add_label:
818 		ret = fdt_setprop_string(blob, newoff, "label", part->name);
819 		if (ret == -FDT_ERR_NOSPACE) {
820 			ret = fdt_increase_size(blob, 512);
821 			if (!ret)
822 				goto add_label;
823 			else
824 				goto err_size;
825 		} else if (ret < 0)
826 			goto err_prop;
827 
828 		part_num++;
829 	}
830 	return 0;
831 err_size:
832 	printf("Can't increase blob size: %s\n", fdt_strerror(ret));
833 	return ret;
834 err_prop:
835 	printf("Can't add property: %s\n", fdt_strerror(ret));
836 	return ret;
837 }
838 
839 /*
840  * Update partitions in nor/nand nodes using info from
841  * mtdparts environment variable. The nodes to update are
842  * specified by node_info structure which contains mtd device
843  * type and compatible string: E. g. the board code in
844  * ft_board_setup() could use:
845  *
846  *	struct node_info nodes[] = {
847  *		{ "fsl,mpc5121-nfc",    MTD_DEV_TYPE_NAND, },
848  *		{ "cfi-flash",          MTD_DEV_TYPE_NOR,  },
849  *	};
850  *
851  *	fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
852  */
853 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
854 {
855 	struct node_info *ni = node_info;
856 	struct mtd_device *dev;
857 	char *parts;
858 	int i, idx;
859 	int noff;
860 
861 	parts = getenv("mtdparts");
862 	if (!parts)
863 		return;
864 
865 	if (mtdparts_init() != 0)
866 		return;
867 
868 	for (i = 0; i < node_info_size; i++) {
869 		idx = 0;
870 		noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
871 		while (noff != -FDT_ERR_NOTFOUND) {
872 			debug("%s: %s, mtd dev type %d\n",
873 				fdt_get_name(blob, noff, 0),
874 				ni[i].compat, ni[i].type);
875 			dev = device_find(ni[i].type, idx++);
876 			if (dev) {
877 				if (fdt_node_set_part_info(blob, noff, dev))
878 					return; /* return on error */
879 			}
880 
881 			/* Jump to next flash node */
882 			noff = fdt_node_offset_by_compatible(blob, noff,
883 							     ni[i].compat);
884 		}
885 	}
886 }
887 #endif
888 
889 void fdt_del_node_and_alias(void *blob, const char *alias)
890 {
891 	int off = fdt_path_offset(blob, alias);
892 
893 	if (off < 0)
894 		return;
895 
896 	fdt_del_node(blob, off);
897 
898 	off = fdt_path_offset(blob, "/aliases");
899 	fdt_delprop(blob, off, alias);
900 }
901 
902 /* Helper to read a big number; size is in cells (not bytes) */
903 static inline u64 of_read_number(const fdt32_t *cell, int size)
904 {
905 	u64 r = 0;
906 	while (size--)
907 		r = (r << 32) | fdt32_to_cpu(*(cell++));
908 	return r;
909 }
910 
911 #define PRu64	"%llx"
912 
913 /* Max address size we deal with */
914 #define OF_MAX_ADDR_CELLS	4
915 #define OF_BAD_ADDR	((u64)-1)
916 #define OF_CHECK_COUNTS(na, ns)	((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
917 			(ns) > 0)
918 
919 /* Debug utility */
920 #ifdef DEBUG
921 static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
922 {
923 	printf("%s", s);
924 	while(na--)
925 		printf(" %08x", *(addr++));
926 	printf("\n");
927 }
928 #else
929 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
930 #endif
931 
932 /* Callbacks for bus specific translators */
933 struct of_bus {
934 	const char	*name;
935 	const char	*addresses;
936 	void		(*count_cells)(void *blob, int parentoffset,
937 				int *addrc, int *sizec);
938 	u64		(*map)(fdt32_t *addr, const fdt32_t *range,
939 				int na, int ns, int pna);
940 	int		(*translate)(fdt32_t *addr, u64 offset, int na);
941 };
942 
943 /* Default translator (generic bus) */
944 static void of_bus_default_count_cells(void *blob, int parentoffset,
945 					int *addrc, int *sizec)
946 {
947 	const fdt32_t *prop;
948 
949 	if (addrc) {
950 		prop = fdt_getprop(blob, parentoffset, "#address-cells", NULL);
951 		if (prop)
952 			*addrc = be32_to_cpup(prop);
953 		else
954 			*addrc = 2;
955 	}
956 
957 	if (sizec) {
958 		prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
959 		if (prop)
960 			*sizec = be32_to_cpup(prop);
961 		else
962 			*sizec = 1;
963 	}
964 }
965 
966 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
967 		int na, int ns, int pna)
968 {
969 	u64 cp, s, da;
970 
971 	cp = of_read_number(range, na);
972 	s  = of_read_number(range + na + pna, ns);
973 	da = of_read_number(addr, na);
974 
975 	debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
976 	    cp, s, da);
977 
978 	if (da < cp || da >= (cp + s))
979 		return OF_BAD_ADDR;
980 	return da - cp;
981 }
982 
983 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
984 {
985 	u64 a = of_read_number(addr, na);
986 	memset(addr, 0, na * 4);
987 	a += offset;
988 	if (na > 1)
989 		addr[na - 2] = cpu_to_fdt32(a >> 32);
990 	addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
991 
992 	return 0;
993 }
994 
995 /* Array of bus specific translators */
996 static struct of_bus of_busses[] = {
997 	/* Default */
998 	{
999 		.name = "default",
1000 		.addresses = "reg",
1001 		.count_cells = of_bus_default_count_cells,
1002 		.map = of_bus_default_map,
1003 		.translate = of_bus_default_translate,
1004 	},
1005 };
1006 
1007 static int of_translate_one(void * blob, int parent, struct of_bus *bus,
1008 			    struct of_bus *pbus, fdt32_t *addr,
1009 			    int na, int ns, int pna, const char *rprop)
1010 {
1011 	const fdt32_t *ranges;
1012 	int rlen;
1013 	int rone;
1014 	u64 offset = OF_BAD_ADDR;
1015 
1016 	/* Normally, an absence of a "ranges" property means we are
1017 	 * crossing a non-translatable boundary, and thus the addresses
1018 	 * below the current not cannot be converted to CPU physical ones.
1019 	 * Unfortunately, while this is very clear in the spec, it's not
1020 	 * what Apple understood, and they do have things like /uni-n or
1021 	 * /ht nodes with no "ranges" property and a lot of perfectly
1022 	 * useable mapped devices below them. Thus we treat the absence of
1023 	 * "ranges" as equivalent to an empty "ranges" property which means
1024 	 * a 1:1 translation at that level. It's up to the caller not to try
1025 	 * to translate addresses that aren't supposed to be translated in
1026 	 * the first place. --BenH.
1027 	 */
1028 	ranges = fdt_getprop(blob, parent, rprop, &rlen);
1029 	if (ranges == NULL || rlen == 0) {
1030 		offset = of_read_number(addr, na);
1031 		memset(addr, 0, pna * 4);
1032 		debug("OF: no ranges, 1:1 translation\n");
1033 		goto finish;
1034 	}
1035 
1036 	debug("OF: walking ranges...\n");
1037 
1038 	/* Now walk through the ranges */
1039 	rlen /= 4;
1040 	rone = na + pna + ns;
1041 	for (; rlen >= rone; rlen -= rone, ranges += rone) {
1042 		offset = bus->map(addr, ranges, na, ns, pna);
1043 		if (offset != OF_BAD_ADDR)
1044 			break;
1045 	}
1046 	if (offset == OF_BAD_ADDR) {
1047 		debug("OF: not found !\n");
1048 		return 1;
1049 	}
1050 	memcpy(addr, ranges + na, 4 * pna);
1051 
1052  finish:
1053 	of_dump_addr("OF: parent translation for:", addr, pna);
1054 	debug("OF: with offset: "PRu64"\n", offset);
1055 
1056 	/* Translate it into parent bus space */
1057 	return pbus->translate(addr, offset, pna);
1058 }
1059 
1060 /*
1061  * Translate an address from the device-tree into a CPU physical address,
1062  * this walks up the tree and applies the various bus mappings on the
1063  * way.
1064  *
1065  * Note: We consider that crossing any level with #size-cells == 0 to mean
1066  * that translation is impossible (that is we are not dealing with a value
1067  * that can be mapped to a cpu physical address). This is not really specified
1068  * that way, but this is traditionally the way IBM at least do things
1069  */
1070 static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr,
1071 				  const char *rprop)
1072 {
1073 	int parent;
1074 	struct of_bus *bus, *pbus;
1075 	fdt32_t addr[OF_MAX_ADDR_CELLS];
1076 	int na, ns, pna, pns;
1077 	u64 result = OF_BAD_ADDR;
1078 
1079 	debug("OF: ** translation for device %s **\n",
1080 		fdt_get_name(blob, node_offset, NULL));
1081 
1082 	/* Get parent & match bus type */
1083 	parent = fdt_parent_offset(blob, node_offset);
1084 	if (parent < 0)
1085 		goto bail;
1086 	bus = &of_busses[0];
1087 
1088 	/* Cound address cells & copy address locally */
1089 	bus->count_cells(blob, parent, &na, &ns);
1090 	if (!OF_CHECK_COUNTS(na, ns)) {
1091 		printf("%s: Bad cell count for %s\n", __FUNCTION__,
1092 		       fdt_get_name(blob, node_offset, NULL));
1093 		goto bail;
1094 	}
1095 	memcpy(addr, in_addr, na * 4);
1096 
1097 	debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1098 	    bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1099 	of_dump_addr("OF: translating address:", addr, na);
1100 
1101 	/* Translate */
1102 	for (;;) {
1103 		/* Switch to parent bus */
1104 		node_offset = parent;
1105 		parent = fdt_parent_offset(blob, node_offset);
1106 
1107 		/* If root, we have finished */
1108 		if (parent < 0) {
1109 			debug("OF: reached root node\n");
1110 			result = of_read_number(addr, na);
1111 			break;
1112 		}
1113 
1114 		/* Get new parent bus and counts */
1115 		pbus = &of_busses[0];
1116 		pbus->count_cells(blob, parent, &pna, &pns);
1117 		if (!OF_CHECK_COUNTS(pna, pns)) {
1118 			printf("%s: Bad cell count for %s\n", __FUNCTION__,
1119 				fdt_get_name(blob, node_offset, NULL));
1120 			break;
1121 		}
1122 
1123 		debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1124 		    pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1125 
1126 		/* Apply bus translation */
1127 		if (of_translate_one(blob, node_offset, bus, pbus,
1128 					addr, na, ns, pna, rprop))
1129 			break;
1130 
1131 		/* Complete the move up one level */
1132 		na = pna;
1133 		ns = pns;
1134 		bus = pbus;
1135 
1136 		of_dump_addr("OF: one level translation:", addr, na);
1137 	}
1138  bail:
1139 
1140 	return result;
1141 }
1142 
1143 u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr)
1144 {
1145 	return __of_translate_address(blob, node_offset, in_addr, "ranges");
1146 }
1147 
1148 /**
1149  * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1150  * who's reg property matches a physical cpu address
1151  *
1152  * @blob: ptr to device tree
1153  * @compat: compatiable string to match
1154  * @compat_off: property name
1155  *
1156  */
1157 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1158 					phys_addr_t compat_off)
1159 {
1160 	int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1161 	while (off != -FDT_ERR_NOTFOUND) {
1162 		const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
1163 		if (reg) {
1164 			if (compat_off == fdt_translate_address(blob, off, reg))
1165 				return off;
1166 		}
1167 		off = fdt_node_offset_by_compatible(blob, off, compat);
1168 	}
1169 
1170 	return -FDT_ERR_NOTFOUND;
1171 }
1172 
1173 /**
1174  * fdt_alloc_phandle: Return next free phandle value
1175  *
1176  * @blob: ptr to device tree
1177  */
1178 int fdt_alloc_phandle(void *blob)
1179 {
1180 	int offset, phandle = 0;
1181 
1182 	for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1183 	     offset = fdt_next_node(blob, offset, NULL)) {
1184 		phandle = max(phandle, fdt_get_phandle(blob, offset));
1185 	}
1186 
1187 	return phandle + 1;
1188 }
1189 
1190 /*
1191  * fdt_set_phandle: Create a phandle property for the given node
1192  *
1193  * @fdt: ptr to device tree
1194  * @nodeoffset: node to update
1195  * @phandle: phandle value to set (must be unique)
1196  */
1197 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
1198 {
1199 	int ret;
1200 
1201 #ifdef DEBUG
1202 	int off = fdt_node_offset_by_phandle(fdt, phandle);
1203 
1204 	if ((off >= 0) && (off != nodeoffset)) {
1205 		char buf[64];
1206 
1207 		fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1208 		printf("Trying to update node %s with phandle %u ",
1209 		       buf, phandle);
1210 
1211 		fdt_get_path(fdt, off, buf, sizeof(buf));
1212 		printf("that already exists in node %s.\n", buf);
1213 		return -FDT_ERR_BADPHANDLE;
1214 	}
1215 #endif
1216 
1217 	ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1218 	if (ret < 0)
1219 		return ret;
1220 
1221 	/*
1222 	 * For now, also set the deprecated "linux,phandle" property, so that we
1223 	 * don't break older kernels.
1224 	 */
1225 	ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1226 
1227 	return ret;
1228 }
1229 
1230 /*
1231  * fdt_create_phandle: Create a phandle property for the given node
1232  *
1233  * @fdt: ptr to device tree
1234  * @nodeoffset: node to update
1235  */
1236 unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
1237 {
1238 	/* see if there is a phandle already */
1239 	int phandle = fdt_get_phandle(fdt, nodeoffset);
1240 
1241 	/* if we got 0, means no phandle so create one */
1242 	if (phandle == 0) {
1243 		int ret;
1244 
1245 		phandle = fdt_alloc_phandle(fdt);
1246 		ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1247 		if (ret < 0) {
1248 			printf("Can't set phandle %u: %s\n", phandle,
1249 			       fdt_strerror(ret));
1250 			return 0;
1251 		}
1252 	}
1253 
1254 	return phandle;
1255 }
1256 
1257 /*
1258  * fdt_set_node_status: Set status for the given node
1259  *
1260  * @fdt: ptr to device tree
1261  * @nodeoffset: node to update
1262  * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1263  *	    FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1264  * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1265  */
1266 int fdt_set_node_status(void *fdt, int nodeoffset,
1267 			enum fdt_status status, unsigned int error_code)
1268 {
1269 	char buf[16];
1270 	int ret = 0;
1271 
1272 	if (nodeoffset < 0)
1273 		return nodeoffset;
1274 
1275 	switch (status) {
1276 	case FDT_STATUS_OKAY:
1277 		ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1278 		break;
1279 	case FDT_STATUS_DISABLED:
1280 		ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1281 		break;
1282 	case FDT_STATUS_FAIL:
1283 		ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1284 		break;
1285 	case FDT_STATUS_FAIL_ERROR_CODE:
1286 		sprintf(buf, "fail-%d", error_code);
1287 		ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1288 		break;
1289 	default:
1290 		printf("Invalid fdt status: %x\n", status);
1291 		ret = -1;
1292 		break;
1293 	}
1294 
1295 	return ret;
1296 }
1297 
1298 /*
1299  * fdt_set_status_by_alias: Set status for the given node given an alias
1300  *
1301  * @fdt: ptr to device tree
1302  * @alias: alias of node to update
1303  * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1304  *	    FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1305  * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1306  */
1307 int fdt_set_status_by_alias(void *fdt, const char* alias,
1308 			    enum fdt_status status, unsigned int error_code)
1309 {
1310 	int offset = fdt_path_offset(fdt, alias);
1311 
1312 	return fdt_set_node_status(fdt, offset, status, error_code);
1313 }
1314 
1315 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1316 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1317 {
1318 	int noff;
1319 	int ret;
1320 
1321 	noff = fdt_node_offset_by_compatible(blob, -1, compat);
1322 	if (noff != -FDT_ERR_NOTFOUND) {
1323 		debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1324 add_edid:
1325 		ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1326 		if (ret == -FDT_ERR_NOSPACE) {
1327 			ret = fdt_increase_size(blob, 512);
1328 			if (!ret)
1329 				goto add_edid;
1330 			else
1331 				goto err_size;
1332 		} else if (ret < 0) {
1333 			printf("Can't add property: %s\n", fdt_strerror(ret));
1334 			return ret;
1335 		}
1336 	}
1337 	return 0;
1338 err_size:
1339 	printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1340 	return ret;
1341 }
1342 #endif
1343 
1344 /*
1345  * Verify the physical address of device tree node for a given alias
1346  *
1347  * This function locates the device tree node of a given alias, and then
1348  * verifies that the physical address of that device matches the given
1349  * parameter.  It displays a message if there is a mismatch.
1350  *
1351  * Returns 1 on success, 0 on failure
1352  */
1353 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1354 {
1355 	const char *path;
1356 	const fdt32_t *reg;
1357 	int node, len;
1358 	u64 dt_addr;
1359 
1360 	path = fdt_getprop(fdt, anode, alias, NULL);
1361 	if (!path) {
1362 		/* If there's no such alias, then it's not a failure */
1363 		return 1;
1364 	}
1365 
1366 	node = fdt_path_offset(fdt, path);
1367 	if (node < 0) {
1368 		printf("Warning: device tree alias '%s' points to invalid "
1369 		       "node %s.\n", alias, path);
1370 		return 0;
1371 	}
1372 
1373 	reg = fdt_getprop(fdt, node, "reg", &len);
1374 	if (!reg) {
1375 		printf("Warning: device tree node '%s' has no address.\n",
1376 		       path);
1377 		return 0;
1378 	}
1379 
1380 	dt_addr = fdt_translate_address(fdt, node, reg);
1381 	if (addr != dt_addr) {
1382 		printf("Warning: U-Boot configured device %s at address %llx,\n"
1383 		       " but the device tree has it address %llx.\n",
1384 		       alias, addr, dt_addr);
1385 		return 0;
1386 	}
1387 
1388 	return 1;
1389 }
1390 
1391 /*
1392  * Returns the base address of an SOC or PCI node
1393  */
1394 u64 fdt_get_base_address(void *fdt, int node)
1395 {
1396 	int size;
1397 	u32 naddr;
1398 	const fdt32_t *prop;
1399 
1400 	prop = fdt_getprop(fdt, node, "#address-cells", &size);
1401 	if (prop && size == 4)
1402 		naddr = be32_to_cpup(prop);
1403 	else
1404 		naddr = 2;
1405 
1406 	prop = fdt_getprop(fdt, node, "ranges", &size);
1407 
1408 	return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
1409 }
1410