xref: /openbmc/u-boot/common/fdt_support.c (revision a2ac1b3a)
1 /*
2  * (C) Copyright 2007
3  * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
4  *
5  * Copyright 2010-2011 Freescale Semiconductor, Inc.
6  *
7  * See file CREDITS for list of people who contributed to this
8  * project.
9  *
10  * This program is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU General Public License as
12  * published by the Free Software Foundation; either version 2 of
13  * the License, or (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23  * MA 02111-1307 USA
24  */
25 
26 #include <common.h>
27 #include <stdio_dev.h>
28 #include <linux/ctype.h>
29 #include <linux/types.h>
30 #include <asm/global_data.h>
31 #include <fdt.h>
32 #include <libfdt.h>
33 #include <fdt_support.h>
34 #include <exports.h>
35 
36 /*
37  * Global data (for the gd->bd)
38  */
39 DECLARE_GLOBAL_DATA_PTR;
40 
41 /**
42  * fdt_getprop_u32_default - Find a node and return it's property or a default
43  *
44  * @fdt: ptr to device tree
45  * @path: path of node
46  * @prop: property name
47  * @dflt: default value if the property isn't found
48  *
49  * Convenience function to find a node and return it's property or a
50  * default value if it doesn't exist.
51  */
52 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
53 				const char *prop, const u32 dflt)
54 {
55 	const u32 *val;
56 	int off;
57 
58 	off = fdt_path_offset(fdt, path);
59 	if (off < 0)
60 		return dflt;
61 
62 	val = fdt_getprop(fdt, off, prop, NULL);
63 	if (val)
64 		return fdt32_to_cpu(*val);
65 	else
66 		return dflt;
67 }
68 
69 /**
70  * fdt_find_and_setprop: Find a node and set it's property
71  *
72  * @fdt: ptr to device tree
73  * @node: path of node
74  * @prop: property name
75  * @val: ptr to new value
76  * @len: length of new property value
77  * @create: flag to create the property if it doesn't exist
78  *
79  * Convenience function to directly set a property given the path to the node.
80  */
81 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
82 			 const void *val, int len, int create)
83 {
84 	int nodeoff = fdt_path_offset(fdt, node);
85 
86 	if (nodeoff < 0)
87 		return nodeoff;
88 
89 	if ((!create) && (fdt_get_property(fdt, nodeoff, prop, 0) == NULL))
90 		return 0; /* create flag not set; so exit quietly */
91 
92 	return fdt_setprop(fdt, nodeoff, prop, val, len);
93 }
94 
95 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
96 
97 #ifdef CONFIG_CONS_INDEX
98 static void fdt_fill_multisername(char *sername, size_t maxlen)
99 {
100 	const char *outname = stdio_devices[stdout]->name;
101 
102 	if (strcmp(outname, "serial") > 0)
103 		strncpy(sername, outname, maxlen);
104 
105 	/* eserial? */
106 	if (strcmp(outname + 1, "serial") > 0)
107 		strncpy(sername, outname + 1, maxlen);
108 }
109 #endif
110 
111 static int fdt_fixup_stdout(void *fdt, int chosenoff)
112 {
113 	int err = 0;
114 #ifdef CONFIG_CONS_INDEX
115 	int node;
116 	char sername[9] = { 0 };
117 	const char *path;
118 
119 	fdt_fill_multisername(sername, sizeof(sername) - 1);
120 	if (!sername[0])
121 		sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
122 
123 	err = node = fdt_path_offset(fdt, "/aliases");
124 	if (node >= 0) {
125 		int len;
126 		path = fdt_getprop(fdt, node, sername, &len);
127 		if (path) {
128 			char *p = malloc(len);
129 			err = -FDT_ERR_NOSPACE;
130 			if (p) {
131 				memcpy(p, path, len);
132 				err = fdt_setprop(fdt, chosenoff,
133 					"linux,stdout-path", p, len);
134 				free(p);
135 			}
136 		} else {
137 			err = len;
138 		}
139 	}
140 #endif
141 	if (err < 0)
142 		printf("WARNING: could not set linux,stdout-path %s.\n",
143 				fdt_strerror(err));
144 
145 	return err;
146 }
147 #endif
148 
149 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force)
150 {
151 	int   nodeoffset;
152 	int   err, j, total;
153 	u32   tmp;
154 	const char *path;
155 	uint64_t addr, size;
156 
157 	/* Find the "chosen" node.  */
158 	nodeoffset = fdt_path_offset (fdt, "/chosen");
159 
160 	/* If there is no "chosen" node in the blob return */
161 	if (nodeoffset < 0) {
162 		printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset));
163 		return nodeoffset;
164 	}
165 
166 	/* just return if initrd_start/end aren't valid */
167 	if ((initrd_start == 0) || (initrd_end == 0))
168 		return 0;
169 
170 	total = fdt_num_mem_rsv(fdt);
171 
172 	/*
173 	 * Look for an existing entry and update it.  If we don't find
174 	 * the entry, we will j be the next available slot.
175 	 */
176 	for (j = 0; j < total; j++) {
177 		err = fdt_get_mem_rsv(fdt, j, &addr, &size);
178 		if (addr == initrd_start) {
179 			fdt_del_mem_rsv(fdt, j);
180 			break;
181 		}
182 	}
183 
184 	err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
185 	if (err < 0) {
186 		printf("fdt_initrd: %s\n", fdt_strerror(err));
187 		return err;
188 	}
189 
190 	path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL);
191 	if ((path == NULL) || force) {
192 		tmp = __cpu_to_be32(initrd_start);
193 		err = fdt_setprop(fdt, nodeoffset,
194 			"linux,initrd-start", &tmp, sizeof(tmp));
195 		if (err < 0) {
196 			printf("WARNING: "
197 				"could not set linux,initrd-start %s.\n",
198 				fdt_strerror(err));
199 			return err;
200 		}
201 		tmp = __cpu_to_be32(initrd_end);
202 		err = fdt_setprop(fdt, nodeoffset,
203 			"linux,initrd-end", &tmp, sizeof(tmp));
204 		if (err < 0) {
205 			printf("WARNING: could not set linux,initrd-end %s.\n",
206 				fdt_strerror(err));
207 
208 			return err;
209 		}
210 	}
211 
212 	return 0;
213 }
214 
215 int fdt_chosen(void *fdt, int force)
216 {
217 	int   nodeoffset;
218 	int   err;
219 	char  *str;		/* used to set string properties */
220 	const char *path;
221 
222 	err = fdt_check_header(fdt);
223 	if (err < 0) {
224 		printf("fdt_chosen: %s\n", fdt_strerror(err));
225 		return err;
226 	}
227 
228 	/*
229 	 * Find the "chosen" node.
230 	 */
231 	nodeoffset = fdt_path_offset (fdt, "/chosen");
232 
233 	/*
234 	 * If there is no "chosen" node in the blob, create it.
235 	 */
236 	if (nodeoffset < 0) {
237 		/*
238 		 * Create a new node "/chosen" (offset 0 is root level)
239 		 */
240 		nodeoffset = fdt_add_subnode(fdt, 0, "chosen");
241 		if (nodeoffset < 0) {
242 			printf("WARNING: could not create /chosen %s.\n",
243 				fdt_strerror(nodeoffset));
244 			return nodeoffset;
245 		}
246 	}
247 
248 	/*
249 	 * Create /chosen properites that don't exist in the fdt.
250 	 * If the property exists, update it only if the "force" parameter
251 	 * is true.
252 	 */
253 	str = getenv("bootargs");
254 	if (str != NULL) {
255 		path = fdt_getprop(fdt, nodeoffset, "bootargs", NULL);
256 		if ((path == NULL) || force) {
257 			err = fdt_setprop(fdt, nodeoffset,
258 				"bootargs", str, strlen(str)+1);
259 			if (err < 0)
260 				printf("WARNING: could not set bootargs %s.\n",
261 					fdt_strerror(err));
262 		}
263 	}
264 
265 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
266 	path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
267 	if ((path == NULL) || force)
268 		err = fdt_fixup_stdout(fdt, nodeoffset);
269 #endif
270 
271 #ifdef OF_STDOUT_PATH
272 	path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
273 	if ((path == NULL) || force) {
274 		err = fdt_setprop(fdt, nodeoffset,
275 			"linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1);
276 		if (err < 0)
277 			printf("WARNING: could not set linux,stdout-path %s.\n",
278 				fdt_strerror(err));
279 	}
280 #endif
281 
282 	return err;
283 }
284 
285 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
286 		      const void *val, int len, int create)
287 {
288 #if defined(DEBUG)
289 	int i;
290 	debug("Updating property '%s/%s' = ", path, prop);
291 	for (i = 0; i < len; i++)
292 		debug(" %.2x", *(u8*)(val+i));
293 	debug("\n");
294 #endif
295 	int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
296 	if (rc)
297 		printf("Unable to update property %s:%s, err=%s\n",
298 			path, prop, fdt_strerror(rc));
299 }
300 
301 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
302 			  u32 val, int create)
303 {
304 	val = cpu_to_fdt32(val);
305 	do_fixup_by_path(fdt, path, prop, &val, sizeof(val), create);
306 }
307 
308 void do_fixup_by_prop(void *fdt,
309 		      const char *pname, const void *pval, int plen,
310 		      const char *prop, const void *val, int len,
311 		      int create)
312 {
313 	int off;
314 #if defined(DEBUG)
315 	int i;
316 	debug("Updating property '%s' = ", prop);
317 	for (i = 0; i < len; i++)
318 		debug(" %.2x", *(u8*)(val+i));
319 	debug("\n");
320 #endif
321 	off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
322 	while (off != -FDT_ERR_NOTFOUND) {
323 		if (create || (fdt_get_property(fdt, off, prop, 0) != NULL))
324 			fdt_setprop(fdt, off, prop, val, len);
325 		off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
326 	}
327 }
328 
329 void do_fixup_by_prop_u32(void *fdt,
330 			  const char *pname, const void *pval, int plen,
331 			  const char *prop, u32 val, int create)
332 {
333 	val = cpu_to_fdt32(val);
334 	do_fixup_by_prop(fdt, pname, pval, plen, prop, &val, 4, create);
335 }
336 
337 void do_fixup_by_compat(void *fdt, const char *compat,
338 			const char *prop, const void *val, int len, int create)
339 {
340 	int off = -1;
341 #if defined(DEBUG)
342 	int i;
343 	debug("Updating property '%s' = ", prop);
344 	for (i = 0; i < len; i++)
345 		debug(" %.2x", *(u8*)(val+i));
346 	debug("\n");
347 #endif
348 	off = fdt_node_offset_by_compatible(fdt, -1, compat);
349 	while (off != -FDT_ERR_NOTFOUND) {
350 		if (create || (fdt_get_property(fdt, off, prop, 0) != NULL))
351 			fdt_setprop(fdt, off, prop, val, len);
352 		off = fdt_node_offset_by_compatible(fdt, off, compat);
353 	}
354 }
355 
356 void do_fixup_by_compat_u32(void *fdt, const char *compat,
357 			    const char *prop, u32 val, int create)
358 {
359 	val = cpu_to_fdt32(val);
360 	do_fixup_by_compat(fdt, compat, prop, &val, 4, create);
361 }
362 
363 /*
364  * Get cells len in bytes
365  *     if #NNNN-cells property is 2 then len is 8
366  *     otherwise len is 4
367  */
368 static int get_cells_len(void *blob, char *nr_cells_name)
369 {
370 	const u32 *cell;
371 
372 	cell = fdt_getprop(blob, 0, nr_cells_name, NULL);
373 	if (cell && fdt32_to_cpu(*cell) == 2)
374 		return 8;
375 
376 	return 4;
377 }
378 
379 /*
380  * Write a 4 or 8 byte big endian cell
381  */
382 static void write_cell(u8 *addr, u64 val, int size)
383 {
384 	int shift = (size - 1) * 8;
385 	while (size-- > 0) {
386 		*addr++ = (val >> shift) & 0xff;
387 		shift -= 8;
388 	}
389 }
390 
391 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
392 {
393 	int err, nodeoffset;
394 	int addr_cell_len, size_cell_len, len;
395 	u8 tmp[banks * 16]; /* Up to 64-bit address + 64-bit size */
396 	int bank;
397 
398 	err = fdt_check_header(blob);
399 	if (err < 0) {
400 		printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
401 		return err;
402 	}
403 
404 	/* update, or add and update /memory node */
405 	nodeoffset = fdt_path_offset(blob, "/memory");
406 	if (nodeoffset < 0) {
407 		nodeoffset = fdt_add_subnode(blob, 0, "memory");
408 		if (nodeoffset < 0)
409 			printf("WARNING: could not create /memory: %s.\n",
410 					fdt_strerror(nodeoffset));
411 		return nodeoffset;
412 	}
413 	err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
414 			sizeof("memory"));
415 	if (err < 0) {
416 		printf("WARNING: could not set %s %s.\n", "device_type",
417 				fdt_strerror(err));
418 		return err;
419 	}
420 
421 	addr_cell_len = get_cells_len(blob, "#address-cells");
422 	size_cell_len = get_cells_len(blob, "#size-cells");
423 
424 	for (bank = 0, len = 0; bank < banks; bank++) {
425 		write_cell(tmp + len, start[bank], addr_cell_len);
426 		len += addr_cell_len;
427 
428 		write_cell(tmp + len, size[bank], size_cell_len);
429 		len += size_cell_len;
430 	}
431 
432 	err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
433 	if (err < 0) {
434 		printf("WARNING: could not set %s %s.\n",
435 				"reg", fdt_strerror(err));
436 		return err;
437 	}
438 	return 0;
439 }
440 
441 int fdt_fixup_memory(void *blob, u64 start, u64 size)
442 {
443 	return fdt_fixup_memory_banks(blob, &start, &size, 1);
444 }
445 
446 void fdt_fixup_ethernet(void *fdt)
447 {
448 	int node, i, j;
449 	char enet[16], *tmp, *end;
450 	char mac[16] = "ethaddr";
451 	const char *path;
452 	unsigned char mac_addr[6];
453 
454 	node = fdt_path_offset(fdt, "/aliases");
455 	if (node < 0)
456 		return;
457 
458 	i = 0;
459 	while ((tmp = getenv(mac)) != NULL) {
460 		sprintf(enet, "ethernet%d", i);
461 		path = fdt_getprop(fdt, node, enet, NULL);
462 		if (!path) {
463 			debug("No alias for %s\n", enet);
464 			sprintf(mac, "eth%daddr", ++i);
465 			continue;
466 		}
467 
468 		for (j = 0; j < 6; j++) {
469 			mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
470 			if (tmp)
471 				tmp = (*end) ? end+1 : end;
472 		}
473 
474 		do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
475 		do_fixup_by_path(fdt, path, "local-mac-address",
476 				&mac_addr, 6, 1);
477 
478 		sprintf(mac, "eth%daddr", ++i);
479 	}
480 }
481 
482 /* Resize the fdt to its actual size + a bit of padding */
483 int fdt_resize(void *blob)
484 {
485 	int i;
486 	uint64_t addr, size;
487 	int total, ret;
488 	uint actualsize;
489 
490 	if (!blob)
491 		return 0;
492 
493 	total = fdt_num_mem_rsv(blob);
494 	for (i = 0; i < total; i++) {
495 		fdt_get_mem_rsv(blob, i, &addr, &size);
496 		if (addr == (uintptr_t)blob) {
497 			fdt_del_mem_rsv(blob, i);
498 			break;
499 		}
500 	}
501 
502 	/*
503 	 * Calculate the actual size of the fdt
504 	 * plus the size needed for 5 fdt_add_mem_rsv, one
505 	 * for the fdt itself and 4 for a possible initrd
506 	 * ((initrd-start + initrd-end) * 2 (name & value))
507 	 */
508 	actualsize = fdt_off_dt_strings(blob) +
509 		fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
510 
511 	/* Make it so the fdt ends on a page boundary */
512 	actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
513 	actualsize = actualsize - ((uintptr_t)blob & 0xfff);
514 
515 	/* Change the fdt header to reflect the correct size */
516 	fdt_set_totalsize(blob, actualsize);
517 
518 	/* Add the new reservation */
519 	ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
520 	if (ret < 0)
521 		return ret;
522 
523 	return actualsize;
524 }
525 
526 #ifdef CONFIG_PCI
527 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
528 
529 #define FDT_PCI_PREFETCH	(0x40000000)
530 #define FDT_PCI_MEM32		(0x02000000)
531 #define FDT_PCI_IO		(0x01000000)
532 #define FDT_PCI_MEM64		(0x03000000)
533 
534 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
535 
536 	int addrcell, sizecell, len, r;
537 	u32 *dma_range;
538 	/* sized based on pci addr cells, size-cells, & address-cells */
539 	u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
540 
541 	addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
542 	sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
543 
544 	dma_range = &dma_ranges[0];
545 	for (r = 0; r < hose->region_count; r++) {
546 		u64 bus_start, phys_start, size;
547 
548 		/* skip if !PCI_REGION_SYS_MEMORY */
549 		if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
550 			continue;
551 
552 		bus_start = (u64)hose->regions[r].bus_start;
553 		phys_start = (u64)hose->regions[r].phys_start;
554 		size = (u64)hose->regions[r].size;
555 
556 		dma_range[0] = 0;
557 		if (size >= 0x100000000ull)
558 			dma_range[0] |= FDT_PCI_MEM64;
559 		else
560 			dma_range[0] |= FDT_PCI_MEM32;
561 		if (hose->regions[r].flags & PCI_REGION_PREFETCH)
562 			dma_range[0] |= FDT_PCI_PREFETCH;
563 #ifdef CONFIG_SYS_PCI_64BIT
564 		dma_range[1] = bus_start >> 32;
565 #else
566 		dma_range[1] = 0;
567 #endif
568 		dma_range[2] = bus_start & 0xffffffff;
569 
570 		if (addrcell == 2) {
571 			dma_range[3] = phys_start >> 32;
572 			dma_range[4] = phys_start & 0xffffffff;
573 		} else {
574 			dma_range[3] = phys_start & 0xffffffff;
575 		}
576 
577 		if (sizecell == 2) {
578 			dma_range[3 + addrcell + 0] = size >> 32;
579 			dma_range[3 + addrcell + 1] = size & 0xffffffff;
580 		} else {
581 			dma_range[3 + addrcell + 0] = size & 0xffffffff;
582 		}
583 
584 		dma_range += (3 + addrcell + sizecell);
585 	}
586 
587 	len = dma_range - &dma_ranges[0];
588 	if (len)
589 		fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
590 
591 	return 0;
592 }
593 #endif
594 
595 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
596 /*
597  * Provide a weak default function to return the flash bank size.
598  * There might be multiple non-identical flash chips connected to one
599  * chip-select, so we need to pass an index as well.
600  */
601 u32 __flash_get_bank_size(int cs, int idx)
602 {
603 	extern flash_info_t flash_info[];
604 
605 	/*
606 	 * As default, a simple 1:1 mapping is provided. Boards with
607 	 * a different mapping need to supply a board specific mapping
608 	 * routine.
609 	 */
610 	return flash_info[cs].size;
611 }
612 u32 flash_get_bank_size(int cs, int idx)
613 	__attribute__((weak, alias("__flash_get_bank_size")));
614 
615 /*
616  * This function can be used to update the size in the "reg" property
617  * of all NOR FLASH device nodes. This is necessary for boards with
618  * non-fixed NOR FLASH sizes.
619  */
620 int fdt_fixup_nor_flash_size(void *blob)
621 {
622 	char compat[][16] = { "cfi-flash", "jedec-flash" };
623 	int off;
624 	int len;
625 	struct fdt_property *prop;
626 	u32 *reg, *reg2;
627 	int i;
628 
629 	for (i = 0; i < 2; i++) {
630 		off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
631 		while (off != -FDT_ERR_NOTFOUND) {
632 			int idx;
633 
634 			/*
635 			 * Found one compatible node, so fixup the size
636 			 * int its reg properties
637 			 */
638 			prop = fdt_get_property_w(blob, off, "reg", &len);
639 			if (prop) {
640 				int tuple_size = 3 * sizeof(reg);
641 
642 				/*
643 				 * There might be multiple reg-tuples,
644 				 * so loop through them all
645 				 */
646 				reg = reg2 = (u32 *)&prop->data[0];
647 				for (idx = 0; idx < (len / tuple_size); idx++) {
648 					/*
649 					 * Update size in reg property
650 					 */
651 					reg[2] = flash_get_bank_size(reg[0],
652 								     idx);
653 
654 					/*
655 					 * Point to next reg tuple
656 					 */
657 					reg += 3;
658 				}
659 
660 				fdt_setprop(blob, off, "reg", reg2, len);
661 			}
662 
663 			/* Move to next compatible node */
664 			off = fdt_node_offset_by_compatible(blob, off,
665 							    compat[i]);
666 		}
667 	}
668 
669 	return 0;
670 }
671 #endif
672 
673 int fdt_increase_size(void *fdt, int add_len)
674 {
675 	int newlen;
676 
677 	newlen = fdt_totalsize(fdt) + add_len;
678 
679 	/* Open in place with a new len */
680 	return fdt_open_into(fdt, fdt, newlen);
681 }
682 
683 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
684 #include <jffs2/load_kernel.h>
685 #include <mtd_node.h>
686 
687 struct reg_cell {
688 	unsigned int r0;
689 	unsigned int r1;
690 };
691 
692 int fdt_del_subnodes(const void *blob, int parent_offset)
693 {
694 	int off, ndepth;
695 	int ret;
696 
697 	for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
698 	     (off >= 0) && (ndepth > 0);
699 	     off = fdt_next_node(blob, off, &ndepth)) {
700 		if (ndepth == 1) {
701 			debug("delete %s: offset: %x\n",
702 				fdt_get_name(blob, off, 0), off);
703 			ret = fdt_del_node((void *)blob, off);
704 			if (ret < 0) {
705 				printf("Can't delete node: %s\n",
706 					fdt_strerror(ret));
707 				return ret;
708 			} else {
709 				ndepth = 0;
710 				off = parent_offset;
711 			}
712 		}
713 	}
714 	return 0;
715 }
716 
717 int fdt_del_partitions(void *blob, int parent_offset)
718 {
719 	const void *prop;
720 	int ndepth = 0;
721 	int off;
722 	int ret;
723 
724 	off = fdt_next_node(blob, parent_offset, &ndepth);
725 	if (off > 0 && ndepth == 1) {
726 		prop = fdt_getprop(blob, off, "label", NULL);
727 		if (prop == NULL) {
728 			/*
729 			 * Could not find label property, nand {}; node?
730 			 * Check subnode, delete partitions there if any.
731 			 */
732 			return fdt_del_partitions(blob, off);
733 		} else {
734 			ret = fdt_del_subnodes(blob, parent_offset);
735 			if (ret < 0) {
736 				printf("Can't remove subnodes: %s\n",
737 					fdt_strerror(ret));
738 				return ret;
739 			}
740 		}
741 	}
742 	return 0;
743 }
744 
745 int fdt_node_set_part_info(void *blob, int parent_offset,
746 			   struct mtd_device *dev)
747 {
748 	struct list_head *pentry;
749 	struct part_info *part;
750 	struct reg_cell cell;
751 	int off, ndepth = 0;
752 	int part_num, ret;
753 	char buf[64];
754 
755 	ret = fdt_del_partitions(blob, parent_offset);
756 	if (ret < 0)
757 		return ret;
758 
759 	/*
760 	 * Check if it is nand {}; subnode, adjust
761 	 * the offset in this case
762 	 */
763 	off = fdt_next_node(blob, parent_offset, &ndepth);
764 	if (off > 0 && ndepth == 1)
765 		parent_offset = off;
766 
767 	part_num = 0;
768 	list_for_each_prev(pentry, &dev->parts) {
769 		int newoff;
770 
771 		part = list_entry(pentry, struct part_info, link);
772 
773 		debug("%2d: %-20s0x%08x\t0x%08x\t%d\n",
774 			part_num, part->name, part->size,
775 			part->offset, part->mask_flags);
776 
777 		sprintf(buf, "partition@%x", part->offset);
778 add_sub:
779 		ret = fdt_add_subnode(blob, parent_offset, buf);
780 		if (ret == -FDT_ERR_NOSPACE) {
781 			ret = fdt_increase_size(blob, 512);
782 			if (!ret)
783 				goto add_sub;
784 			else
785 				goto err_size;
786 		} else if (ret < 0) {
787 			printf("Can't add partition node: %s\n",
788 				fdt_strerror(ret));
789 			return ret;
790 		}
791 		newoff = ret;
792 
793 		/* Check MTD_WRITEABLE_CMD flag */
794 		if (part->mask_flags & 1) {
795 add_ro:
796 			ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
797 			if (ret == -FDT_ERR_NOSPACE) {
798 				ret = fdt_increase_size(blob, 512);
799 				if (!ret)
800 					goto add_ro;
801 				else
802 					goto err_size;
803 			} else if (ret < 0)
804 				goto err_prop;
805 		}
806 
807 		cell.r0 = cpu_to_fdt32(part->offset);
808 		cell.r1 = cpu_to_fdt32(part->size);
809 add_reg:
810 		ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
811 		if (ret == -FDT_ERR_NOSPACE) {
812 			ret = fdt_increase_size(blob, 512);
813 			if (!ret)
814 				goto add_reg;
815 			else
816 				goto err_size;
817 		} else if (ret < 0)
818 			goto err_prop;
819 
820 add_label:
821 		ret = fdt_setprop_string(blob, newoff, "label", part->name);
822 		if (ret == -FDT_ERR_NOSPACE) {
823 			ret = fdt_increase_size(blob, 512);
824 			if (!ret)
825 				goto add_label;
826 			else
827 				goto err_size;
828 		} else if (ret < 0)
829 			goto err_prop;
830 
831 		part_num++;
832 	}
833 	return 0;
834 err_size:
835 	printf("Can't increase blob size: %s\n", fdt_strerror(ret));
836 	return ret;
837 err_prop:
838 	printf("Can't add property: %s\n", fdt_strerror(ret));
839 	return ret;
840 }
841 
842 /*
843  * Update partitions in nor/nand nodes using info from
844  * mtdparts environment variable. The nodes to update are
845  * specified by node_info structure which contains mtd device
846  * type and compatible string: E. g. the board code in
847  * ft_board_setup() could use:
848  *
849  *	struct node_info nodes[] = {
850  *		{ "fsl,mpc5121-nfc",    MTD_DEV_TYPE_NAND, },
851  *		{ "cfi-flash",          MTD_DEV_TYPE_NOR,  },
852  *	};
853  *
854  *	fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
855  */
856 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
857 {
858 	struct node_info *ni = node_info;
859 	struct mtd_device *dev;
860 	char *parts;
861 	int i, idx;
862 	int noff;
863 
864 	parts = getenv("mtdparts");
865 	if (!parts)
866 		return;
867 
868 	if (mtdparts_init() != 0)
869 		return;
870 
871 	for (i = 0; i < node_info_size; i++) {
872 		idx = 0;
873 		noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
874 		while (noff != -FDT_ERR_NOTFOUND) {
875 			debug("%s: %s, mtd dev type %d\n",
876 				fdt_get_name(blob, noff, 0),
877 				ni[i].compat, ni[i].type);
878 			dev = device_find(ni[i].type, idx++);
879 			if (dev) {
880 				if (fdt_node_set_part_info(blob, noff, dev))
881 					return; /* return on error */
882 			}
883 
884 			/* Jump to next flash node */
885 			noff = fdt_node_offset_by_compatible(blob, noff,
886 							     ni[i].compat);
887 		}
888 	}
889 }
890 #endif
891 
892 void fdt_del_node_and_alias(void *blob, const char *alias)
893 {
894 	int off = fdt_path_offset(blob, alias);
895 
896 	if (off < 0)
897 		return;
898 
899 	fdt_del_node(blob, off);
900 
901 	off = fdt_path_offset(blob, "/aliases");
902 	fdt_delprop(blob, off, alias);
903 }
904 
905 /* Helper to read a big number; size is in cells (not bytes) */
906 static inline u64 of_read_number(const __be32 *cell, int size)
907 {
908 	u64 r = 0;
909 	while (size--)
910 		r = (r << 32) | be32_to_cpu(*(cell++));
911 	return r;
912 }
913 
914 #define PRu64	"%llx"
915 
916 /* Max address size we deal with */
917 #define OF_MAX_ADDR_CELLS	4
918 #define OF_BAD_ADDR	((u64)-1)
919 #define OF_CHECK_COUNTS(na, ns)	((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
920 			(ns) > 0)
921 
922 /* Debug utility */
923 #ifdef DEBUG
924 static void of_dump_addr(const char *s, const u32 *addr, int na)
925 {
926 	printf("%s", s);
927 	while(na--)
928 		printf(" %08x", *(addr++));
929 	printf("\n");
930 }
931 #else
932 static void of_dump_addr(const char *s, const u32 *addr, int na) { }
933 #endif
934 
935 /* Callbacks for bus specific translators */
936 struct of_bus {
937 	const char	*name;
938 	const char	*addresses;
939 	void		(*count_cells)(void *blob, int parentoffset,
940 				int *addrc, int *sizec);
941 	u64		(*map)(u32 *addr, const u32 *range,
942 				int na, int ns, int pna);
943 	int		(*translate)(u32 *addr, u64 offset, int na);
944 };
945 
946 /* Default translator (generic bus) */
947 static void of_bus_default_count_cells(void *blob, int parentoffset,
948 					int *addrc, int *sizec)
949 {
950 	const u32 *prop;
951 
952 	if (addrc) {
953 		prop = fdt_getprop(blob, parentoffset, "#address-cells", NULL);
954 		if (prop)
955 			*addrc = be32_to_cpup((u32 *)prop);
956 		else
957 			*addrc = 2;
958 	}
959 
960 	if (sizec) {
961 		prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
962 		if (prop)
963 			*sizec = be32_to_cpup((u32 *)prop);
964 		else
965 			*sizec = 1;
966 	}
967 }
968 
969 static u64 of_bus_default_map(u32 *addr, const u32 *range,
970 		int na, int ns, int pna)
971 {
972 	u64 cp, s, da;
973 
974 	cp = of_read_number(range, na);
975 	s  = of_read_number(range + na + pna, ns);
976 	da = of_read_number(addr, na);
977 
978 	debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
979 	    cp, s, da);
980 
981 	if (da < cp || da >= (cp + s))
982 		return OF_BAD_ADDR;
983 	return da - cp;
984 }
985 
986 static int of_bus_default_translate(u32 *addr, u64 offset, int na)
987 {
988 	u64 a = of_read_number(addr, na);
989 	memset(addr, 0, na * 4);
990 	a += offset;
991 	if (na > 1)
992 		addr[na - 2] = a >> 32;
993 	addr[na - 1] = a & 0xffffffffu;
994 
995 	return 0;
996 }
997 
998 /* Array of bus specific translators */
999 static struct of_bus of_busses[] = {
1000 	/* Default */
1001 	{
1002 		.name = "default",
1003 		.addresses = "reg",
1004 		.count_cells = of_bus_default_count_cells,
1005 		.map = of_bus_default_map,
1006 		.translate = of_bus_default_translate,
1007 	},
1008 };
1009 
1010 static int of_translate_one(void * blob, int parent, struct of_bus *bus,
1011 			    struct of_bus *pbus, u32 *addr,
1012 			    int na, int ns, int pna, const char *rprop)
1013 {
1014 	const u32 *ranges;
1015 	int rlen;
1016 	int rone;
1017 	u64 offset = OF_BAD_ADDR;
1018 
1019 	/* Normally, an absence of a "ranges" property means we are
1020 	 * crossing a non-translatable boundary, and thus the addresses
1021 	 * below the current not cannot be converted to CPU physical ones.
1022 	 * Unfortunately, while this is very clear in the spec, it's not
1023 	 * what Apple understood, and they do have things like /uni-n or
1024 	 * /ht nodes with no "ranges" property and a lot of perfectly
1025 	 * useable mapped devices below them. Thus we treat the absence of
1026 	 * "ranges" as equivalent to an empty "ranges" property which means
1027 	 * a 1:1 translation at that level. It's up to the caller not to try
1028 	 * to translate addresses that aren't supposed to be translated in
1029 	 * the first place. --BenH.
1030 	 */
1031 	ranges = (u32 *)fdt_getprop(blob, parent, rprop, &rlen);
1032 	if (ranges == NULL || rlen == 0) {
1033 		offset = of_read_number(addr, na);
1034 		memset(addr, 0, pna * 4);
1035 		debug("OF: no ranges, 1:1 translation\n");
1036 		goto finish;
1037 	}
1038 
1039 	debug("OF: walking ranges...\n");
1040 
1041 	/* Now walk through the ranges */
1042 	rlen /= 4;
1043 	rone = na + pna + ns;
1044 	for (; rlen >= rone; rlen -= rone, ranges += rone) {
1045 		offset = bus->map(addr, ranges, na, ns, pna);
1046 		if (offset != OF_BAD_ADDR)
1047 			break;
1048 	}
1049 	if (offset == OF_BAD_ADDR) {
1050 		debug("OF: not found !\n");
1051 		return 1;
1052 	}
1053 	memcpy(addr, ranges + na, 4 * pna);
1054 
1055  finish:
1056 	of_dump_addr("OF: parent translation for:", addr, pna);
1057 	debug("OF: with offset: "PRu64"\n", offset);
1058 
1059 	/* Translate it into parent bus space */
1060 	return pbus->translate(addr, offset, pna);
1061 }
1062 
1063 /*
1064  * Translate an address from the device-tree into a CPU physical address,
1065  * this walks up the tree and applies the various bus mappings on the
1066  * way.
1067  *
1068  * Note: We consider that crossing any level with #size-cells == 0 to mean
1069  * that translation is impossible (that is we are not dealing with a value
1070  * that can be mapped to a cpu physical address). This is not really specified
1071  * that way, but this is traditionally the way IBM at least do things
1072  */
1073 u64 __of_translate_address(void *blob, int node_offset, const u32 *in_addr,
1074 			   const char *rprop)
1075 {
1076 	int parent;
1077 	struct of_bus *bus, *pbus;
1078 	u32 addr[OF_MAX_ADDR_CELLS];
1079 	int na, ns, pna, pns;
1080 	u64 result = OF_BAD_ADDR;
1081 
1082 	debug("OF: ** translation for device %s **\n",
1083 		fdt_get_name(blob, node_offset, NULL));
1084 
1085 	/* Get parent & match bus type */
1086 	parent = fdt_parent_offset(blob, node_offset);
1087 	if (parent < 0)
1088 		goto bail;
1089 	bus = &of_busses[0];
1090 
1091 	/* Cound address cells & copy address locally */
1092 	bus->count_cells(blob, parent, &na, &ns);
1093 	if (!OF_CHECK_COUNTS(na, ns)) {
1094 		printf("%s: Bad cell count for %s\n", __FUNCTION__,
1095 		       fdt_get_name(blob, node_offset, NULL));
1096 		goto bail;
1097 	}
1098 	memcpy(addr, in_addr, na * 4);
1099 
1100 	debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1101 	    bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1102 	of_dump_addr("OF: translating address:", addr, na);
1103 
1104 	/* Translate */
1105 	for (;;) {
1106 		/* Switch to parent bus */
1107 		node_offset = parent;
1108 		parent = fdt_parent_offset(blob, node_offset);
1109 
1110 		/* If root, we have finished */
1111 		if (parent < 0) {
1112 			debug("OF: reached root node\n");
1113 			result = of_read_number(addr, na);
1114 			break;
1115 		}
1116 
1117 		/* Get new parent bus and counts */
1118 		pbus = &of_busses[0];
1119 		pbus->count_cells(blob, parent, &pna, &pns);
1120 		if (!OF_CHECK_COUNTS(pna, pns)) {
1121 			printf("%s: Bad cell count for %s\n", __FUNCTION__,
1122 				fdt_get_name(blob, node_offset, NULL));
1123 			break;
1124 		}
1125 
1126 		debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1127 		    pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1128 
1129 		/* Apply bus translation */
1130 		if (of_translate_one(blob, node_offset, bus, pbus,
1131 					addr, na, ns, pna, rprop))
1132 			break;
1133 
1134 		/* Complete the move up one level */
1135 		na = pna;
1136 		ns = pns;
1137 		bus = pbus;
1138 
1139 		of_dump_addr("OF: one level translation:", addr, na);
1140 	}
1141  bail:
1142 
1143 	return result;
1144 }
1145 
1146 u64 fdt_translate_address(void *blob, int node_offset, const u32 *in_addr)
1147 {
1148 	return __of_translate_address(blob, node_offset, in_addr, "ranges");
1149 }
1150 
1151 /**
1152  * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1153  * who's reg property matches a physical cpu address
1154  *
1155  * @blob: ptr to device tree
1156  * @compat: compatiable string to match
1157  * @compat_off: property name
1158  *
1159  */
1160 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1161 					phys_addr_t compat_off)
1162 {
1163 	int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1164 	while (off != -FDT_ERR_NOTFOUND) {
1165 		u32 *reg = (u32 *)fdt_getprop(blob, off, "reg", &len);
1166 		if (reg) {
1167 			if (compat_off == fdt_translate_address(blob, off, reg))
1168 				return off;
1169 		}
1170 		off = fdt_node_offset_by_compatible(blob, off, compat);
1171 	}
1172 
1173 	return -FDT_ERR_NOTFOUND;
1174 }
1175 
1176 /**
1177  * fdt_alloc_phandle: Return next free phandle value
1178  *
1179  * @blob: ptr to device tree
1180  */
1181 int fdt_alloc_phandle(void *blob)
1182 {
1183 	int offset, phandle = 0;
1184 
1185 	for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1186 	     offset = fdt_next_node(blob, offset, NULL)) {
1187 		phandle = max(phandle, fdt_get_phandle(blob, offset));
1188 	}
1189 
1190 	return phandle + 1;
1191 }
1192 
1193 /*
1194  * fdt_set_phandle: Create a phandle property for the given node
1195  *
1196  * @fdt: ptr to device tree
1197  * @nodeoffset: node to update
1198  * @phandle: phandle value to set (must be unique)
1199  */
1200 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
1201 {
1202 	int ret;
1203 
1204 #ifdef DEBUG
1205 	int off = fdt_node_offset_by_phandle(fdt, phandle);
1206 
1207 	if ((off >= 0) && (off != nodeoffset)) {
1208 		char buf[64];
1209 
1210 		fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1211 		printf("Trying to update node %s with phandle %u ",
1212 		       buf, phandle);
1213 
1214 		fdt_get_path(fdt, off, buf, sizeof(buf));
1215 		printf("that already exists in node %s.\n", buf);
1216 		return -FDT_ERR_BADPHANDLE;
1217 	}
1218 #endif
1219 
1220 	ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1221 	if (ret < 0)
1222 		return ret;
1223 
1224 	/*
1225 	 * For now, also set the deprecated "linux,phandle" property, so that we
1226 	 * don't break older kernels.
1227 	 */
1228 	ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1229 
1230 	return ret;
1231 }
1232 
1233 /*
1234  * fdt_create_phandle: Create a phandle property for the given node
1235  *
1236  * @fdt: ptr to device tree
1237  * @nodeoffset: node to update
1238  */
1239 unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
1240 {
1241 	/* see if there is a phandle already */
1242 	int phandle = fdt_get_phandle(fdt, nodeoffset);
1243 
1244 	/* if we got 0, means no phandle so create one */
1245 	if (phandle == 0) {
1246 		int ret;
1247 
1248 		phandle = fdt_alloc_phandle(fdt);
1249 		ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1250 		if (ret < 0) {
1251 			printf("Can't set phandle %u: %s\n", phandle,
1252 			       fdt_strerror(ret));
1253 			return 0;
1254 		}
1255 	}
1256 
1257 	return phandle;
1258 }
1259 
1260 /*
1261  * fdt_set_node_status: Set status for the given node
1262  *
1263  * @fdt: ptr to device tree
1264  * @nodeoffset: node to update
1265  * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1266  *	    FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1267  * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1268  */
1269 int fdt_set_node_status(void *fdt, int nodeoffset,
1270 			enum fdt_status status, unsigned int error_code)
1271 {
1272 	char buf[16];
1273 	int ret = 0;
1274 
1275 	if (nodeoffset < 0)
1276 		return nodeoffset;
1277 
1278 	switch (status) {
1279 	case FDT_STATUS_OKAY:
1280 		ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1281 		break;
1282 	case FDT_STATUS_DISABLED:
1283 		ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1284 		break;
1285 	case FDT_STATUS_FAIL:
1286 		ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1287 		break;
1288 	case FDT_STATUS_FAIL_ERROR_CODE:
1289 		sprintf(buf, "fail-%d", error_code);
1290 		ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1291 		break;
1292 	default:
1293 		printf("Invalid fdt status: %x\n", status);
1294 		ret = -1;
1295 		break;
1296 	}
1297 
1298 	return ret;
1299 }
1300 
1301 /*
1302  * fdt_set_status_by_alias: Set status for the given node given an alias
1303  *
1304  * @fdt: ptr to device tree
1305  * @alias: alias of node to update
1306  * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1307  *	    FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1308  * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1309  */
1310 int fdt_set_status_by_alias(void *fdt, const char* alias,
1311 			    enum fdt_status status, unsigned int error_code)
1312 {
1313 	int offset = fdt_path_offset(fdt, alias);
1314 
1315 	return fdt_set_node_status(fdt, offset, status, error_code);
1316 }
1317 
1318 #if defined(CONFIG_VIDEO)
1319 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1320 {
1321 	int noff;
1322 	int ret;
1323 
1324 	noff = fdt_node_offset_by_compatible(blob, -1, compat);
1325 	if (noff != -FDT_ERR_NOTFOUND) {
1326 		debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1327 add_edid:
1328 		ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1329 		if (ret == -FDT_ERR_NOSPACE) {
1330 			ret = fdt_increase_size(blob, 512);
1331 			if (!ret)
1332 				goto add_edid;
1333 			else
1334 				goto err_size;
1335 		} else if (ret < 0) {
1336 			printf("Can't add property: %s\n", fdt_strerror(ret));
1337 			return ret;
1338 		}
1339 	}
1340 	return 0;
1341 err_size:
1342 	printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1343 	return ret;
1344 }
1345 #endif
1346 
1347 /*
1348  * Verify the physical address of device tree node for a given alias
1349  *
1350  * This function locates the device tree node of a given alias, and then
1351  * verifies that the physical address of that device matches the given
1352  * parameter.  It displays a message if there is a mismatch.
1353  *
1354  * Returns 1 on success, 0 on failure
1355  */
1356 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1357 {
1358 	const char *path;
1359 	const u32 *reg;
1360 	int node, len;
1361 	u64 dt_addr;
1362 
1363 	path = fdt_getprop(fdt, anode, alias, NULL);
1364 	if (!path) {
1365 		/* If there's no such alias, then it's not a failure */
1366 		return 1;
1367 	}
1368 
1369 	node = fdt_path_offset(fdt, path);
1370 	if (node < 0) {
1371 		printf("Warning: device tree alias '%s' points to invalid "
1372 		       "node %s.\n", alias, path);
1373 		return 0;
1374 	}
1375 
1376 	reg = fdt_getprop(fdt, node, "reg", &len);
1377 	if (!reg) {
1378 		printf("Warning: device tree node '%s' has no address.\n",
1379 		       path);
1380 		return 0;
1381 	}
1382 
1383 	dt_addr = fdt_translate_address(fdt, node, reg);
1384 	if (addr != dt_addr) {
1385 		printf("Warning: U-Boot configured device %s at address %llx,\n"
1386 		       " but the device tree has it address %llx.\n",
1387 		       alias, addr, dt_addr);
1388 		return 0;
1389 	}
1390 
1391 	return 1;
1392 }
1393 
1394 /*
1395  * Returns the base address of an SOC or PCI node
1396  */
1397 u64 fdt_get_base_address(void *fdt, int node)
1398 {
1399 	int size;
1400 	u32 naddr;
1401 	const u32 *prop;
1402 
1403 	prop = fdt_getprop(fdt, node, "#address-cells", &size);
1404 	if (prop && size == 4)
1405 		naddr = *prop;
1406 	else
1407 		naddr = 2;
1408 
1409 	prop = fdt_getprop(fdt, node, "ranges", &size);
1410 
1411 	return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
1412 }
1413