1 // SPDX-License-Identifier: GPL-2.0+
6 * Copyright 2010-2011 Freescale Semiconductor, Inc.
15 #include <stdio_dev.h>
16 #include <dm/ofnode.h>
17 #include <linux/ctype.h>
18 #include <linux/types.h>
19 #include <asm/global_data.h>
20 #include <linux/libfdt.h>
21 #include <fdt_support.h>
27 * fdt_getprop_u32_default_node - Return a node's property or a default
29 * @fdt: ptr to device tree
30 * @off: offset of node
31 * @cell: cell offset in property
32 * @prop: property name
33 * @dflt: default value if the property isn't found
35 * Convenience function to return a node's property or a default value if
36 * the property doesn't exist.
38 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
39 const char *prop, const u32 dflt)
44 val = fdt_getprop(fdt, off, prop, &len);
46 /* Check if property exists */
50 /* Check if property is long enough */
51 if (len < ((cell + 1) * sizeof(uint32_t)))
54 return fdt32_to_cpu(*val);
58 * fdt_getprop_u32_default - Find a node and return it's property or a default
60 * @fdt: ptr to device tree
62 * @prop: property name
63 * @dflt: default value if the property isn't found
65 * Convenience function to find a node and return it's property or a
66 * default value if it doesn't exist.
68 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
69 const char *prop, const u32 dflt)
73 off = fdt_path_offset(fdt, path);
77 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
81 * fdt_find_and_setprop: Find a node and set it's property
83 * @fdt: ptr to device tree
85 * @prop: property name
86 * @val: ptr to new value
87 * @len: length of new property value
88 * @create: flag to create the property if it doesn't exist
90 * Convenience function to directly set a property given the path to the node.
92 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
93 const void *val, int len, int create)
95 int nodeoff = fdt_path_offset(fdt, node);
100 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
101 return 0; /* create flag not set; so exit quietly */
103 return fdt_setprop(fdt, nodeoff, prop, val, len);
107 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
109 * @fdt: pointer to the device tree blob
110 * @parentoffset: structure block offset of a node
111 * @name: name of the subnode to locate
113 * fdt_subnode_offset() finds a subnode of the node with a given name.
114 * If the subnode does not exist, it will be created.
116 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name)
120 offset = fdt_subnode_offset(fdt, parentoffset, name);
122 if (offset == -FDT_ERR_NOTFOUND)
123 offset = fdt_add_subnode(fdt, parentoffset, name);
126 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset));
131 #if defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
132 static int fdt_fixup_stdout(void *fdt, int chosenoff)
136 char sername[9] = { 0 };
139 char tmp[256]; /* long enough */
141 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
143 aliasoff = fdt_path_offset(fdt, "/aliases");
149 path = fdt_getprop(fdt, aliasoff, sername, &len);
155 /* fdt_setprop may break "path" so we copy it to tmp buffer */
156 memcpy(tmp, path, len);
158 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len);
160 printf("WARNING: could not set linux,stdout-path %s.\n",
166 printf("WARNING: %s: could not read %s alias: %s\n",
167 __func__, sername, fdt_strerror(err));
172 static int fdt_fixup_stdout(void *fdt, int chosenoff)
178 static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
179 uint64_t val, int is_u64)
182 return fdt_setprop_u64(fdt, nodeoffset, name, val);
184 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
187 int fdt_root(void *fdt)
192 err = fdt_check_header(fdt);
194 printf("fdt_root: %s\n", fdt_strerror(err));
198 serial = env_get("serial#");
200 err = fdt_setprop(fdt, 0, "serial-number", serial,
204 printf("WARNING: could not set serial-number %s.\n",
213 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
220 /* just return if the size of initrd is zero */
221 if (initrd_start == initrd_end)
224 /* find or create "/chosen" node. */
225 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
229 total = fdt_num_mem_rsv(fdt);
232 * Look for an existing entry and update it. If we don't find
233 * the entry, we will j be the next available slot.
235 for (j = 0; j < total; j++) {
236 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
237 if (addr == initrd_start) {
238 fdt_del_mem_rsv(fdt, j);
243 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
245 printf("fdt_initrd: %s\n", fdt_strerror(err));
249 is_u64 = (fdt_address_cells(fdt, 0) == 2);
251 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
252 (uint64_t)initrd_start, is_u64);
255 printf("WARNING: could not set linux,initrd-start %s.\n",
260 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
261 (uint64_t)initrd_end, is_u64);
264 printf("WARNING: could not set linux,initrd-end %s.\n",
274 * board_fdt_chosen_bootargs - boards may override this function to use
275 * alternative kernel command line arguments
277 __weak char *board_fdt_chosen_bootargs(void)
279 return env_get("bootargs");
282 int fdt_chosen(void *fdt)
284 struct abuf buf = {};
287 char *str; /* used to set string properties */
289 err = fdt_check_header(fdt);
291 printf("fdt_chosen: %s\n", fdt_strerror(err));
295 /* find or create "/chosen" node. */
296 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
300 if (IS_ENABLED(CONFIG_BOARD_RNG_SEED) && !board_rng_seed(&buf)) {
301 err = fdt_setprop(fdt, nodeoffset, "rng-seed",
302 abuf_data(&buf), abuf_size(&buf));
305 printf("WARNING: could not set rng-seed %s.\n",
311 str = board_fdt_chosen_bootargs();
314 err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
317 printf("WARNING: could not set bootargs %s.\n",
323 /* add u-boot version */
324 err = fdt_setprop(fdt, nodeoffset, "u-boot,version", PLAIN_VERSION,
325 strlen(PLAIN_VERSION) + 1);
327 printf("WARNING: could not set u-boot,version %s.\n",
332 return fdt_fixup_stdout(fdt, nodeoffset);
335 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
336 const void *val, int len, int create)
340 debug("Updating property '%s/%s' = ", path, prop);
341 for (i = 0; i < len; i++)
342 debug(" %.2x", *(u8*)(val+i));
345 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
347 printf("Unable to update property %s:%s, err=%s\n",
348 path, prop, fdt_strerror(rc));
351 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
354 fdt32_t tmp = cpu_to_fdt32(val);
355 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
358 void do_fixup_by_prop(void *fdt,
359 const char *pname, const void *pval, int plen,
360 const char *prop, const void *val, int len,
366 debug("Updating property '%s' = ", prop);
367 for (i = 0; i < len; i++)
368 debug(" %.2x", *(u8*)(val+i));
371 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
372 while (off != -FDT_ERR_NOTFOUND) {
373 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
374 fdt_setprop(fdt, off, prop, val, len);
375 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
379 void do_fixup_by_prop_u32(void *fdt,
380 const char *pname, const void *pval, int plen,
381 const char *prop, u32 val, int create)
383 fdt32_t tmp = cpu_to_fdt32(val);
384 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
387 void do_fixup_by_compat(void *fdt, const char *compat,
388 const char *prop, const void *val, int len, int create)
393 debug("Updating property '%s' = ", prop);
394 for (i = 0; i < len; i++)
395 debug(" %.2x", *(u8*)(val+i));
398 fdt_for_each_node_by_compatible(off, fdt, -1, compat)
399 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
400 fdt_setprop(fdt, off, prop, val, len);
403 void do_fixup_by_compat_u32(void *fdt, const char *compat,
404 const char *prop, u32 val, int create)
406 fdt32_t tmp = cpu_to_fdt32(val);
407 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
410 #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
412 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
414 static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
418 int address_cells = fdt_address_cells(fdt, 0);
419 int size_cells = fdt_size_cells(fdt, 0);
422 for (i = 0; i < n; i++) {
423 if (address_cells == 2)
424 *(fdt64_t *)p = cpu_to_fdt64(address[i]);
426 *(fdt32_t *)p = cpu_to_fdt32(address[i]);
427 p += 4 * address_cells;
430 *(fdt64_t *)p = cpu_to_fdt64(size[i]);
432 *(fdt32_t *)p = cpu_to_fdt32(size[i]);
436 return p - (char *)buf;
439 #if CONFIG_NR_DRAM_BANKS > 4
440 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
442 #define MEMORY_BANKS_MAX 4
446 * fdt_fixup_memory_banks - Update DT memory node
447 * @blob: Pointer to DT blob
448 * @start: Pointer to memory start addresses array
449 * @size: Pointer to memory sizes array
450 * @banks: Number of memory banks
452 * Return: 0 on success, negative value on failure
454 * Based on the passed number of banks and arrays, the function is able to
455 * update existing DT memory nodes to match run time detected/changed memory
456 * configuration. Implementation is handling one specific case with only one
457 * memory node where multiple tuples could be added/updated.
458 * The case where multiple memory nodes with a single tuple (base, size) are
459 * used, this function is only updating the first memory node without removing
462 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
466 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
468 if (banks > MEMORY_BANKS_MAX) {
469 printf("%s: num banks %d exceeds hardcoded limit %d."
470 " Recompile with higher MEMORY_BANKS_MAX?\n",
471 __FUNCTION__, banks, MEMORY_BANKS_MAX);
475 err = fdt_check_header(blob);
477 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
481 /* find or create "/memory" node. */
482 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
486 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
489 printf("WARNING: could not set %s %s.\n", "device_type",
494 for (i = 0; i < banks; i++) {
495 if (start[i] == 0 && size[i] == 0)
504 len = fdt_pack_reg(blob, tmp, start, size, banks);
506 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
508 printf("WARNING: could not set %s %s.\n",
509 "reg", fdt_strerror(err));
515 int fdt_set_usable_memory(void *blob, u64 start[], u64 size[], int areas)
519 u8 tmp[8 * 16]; /* Up to 64-bit address + 64-bit size */
522 printf("%s: num areas %d exceeds hardcoded limit %d\n",
527 err = fdt_check_header(blob);
529 printf("%s: %s\n", __func__, fdt_strerror(err));
533 /* find or create "/memory" node. */
534 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
538 len = fdt_pack_reg(blob, tmp, start, size, areas);
540 err = fdt_setprop(blob, nodeoffset, "linux,usable-memory", tmp, len);
542 printf("WARNING: could not set %s %s.\n",
543 "reg", fdt_strerror(err));
551 int fdt_fixup_memory(void *blob, u64 start, u64 size)
553 return fdt_fixup_memory_banks(blob, &start, &size, 1);
556 void fdt_fixup_ethernet(void *fdt)
562 unsigned char mac_addr[ARP_HLEN];
564 #ifdef FDT_SEQ_MACADDR_FROM_ENV
566 const struct fdt_property *fdt_prop;
569 if (fdt_path_offset(fdt, "/aliases") < 0)
572 /* Cycle through all aliases */
573 for (prop = 0; ; prop++) {
576 /* FDT might have been edited, recompute the offset */
577 offset = fdt_first_property_offset(fdt,
578 fdt_path_offset(fdt, "/aliases"));
579 /* Select property number 'prop' */
580 for (j = 0; j < prop; j++)
581 offset = fdt_next_property_offset(fdt, offset);
586 path = fdt_getprop_by_offset(fdt, offset, &name, NULL);
587 if (!strncmp(name, "ethernet", 8)) {
588 /* Treat plain "ethernet" same as "ethernet0". */
589 if (!strcmp(name, "ethernet")
590 #ifdef FDT_SEQ_MACADDR_FROM_ENV
591 || !strcmp(name, "ethernet0")
595 #ifndef FDT_SEQ_MACADDR_FROM_ENV
597 i = trailing_strtol(name);
601 strcpy(mac, "ethaddr");
603 sprintf(mac, "eth%daddr", i);
607 #ifdef FDT_SEQ_MACADDR_FROM_ENV
608 nodeoff = fdt_path_offset(fdt, path);
609 fdt_prop = fdt_get_property(fdt, nodeoff, "status",
611 if (fdt_prop && !strcmp(fdt_prop->data, "disabled"))
619 for (j = 0; j < 6; j++) {
621 hextoul(tmp, &end) : 0;
623 tmp = (*end) ? end + 1 : end;
626 do_fixup_by_path(fdt, path, "mac-address",
628 do_fixup_by_path(fdt, path, "local-mac-address",
634 int fdt_record_loadable(void *blob, u32 index, const char *name,
635 uintptr_t load_addr, u32 size, uintptr_t entry_point,
636 const char *type, const char *os, const char *arch)
640 err = fdt_check_header(blob);
642 printf("%s: %s\n", __func__, fdt_strerror(err));
646 /* find or create "/fit-images" node */
647 node = fdt_find_or_add_subnode(blob, 0, "fit-images");
651 /* find or create "/fit-images/<name>" node */
652 node = fdt_find_or_add_subnode(blob, node, name);
656 fdt_setprop_u64(blob, node, "load", load_addr);
657 if (entry_point != -1)
658 fdt_setprop_u64(blob, node, "entry", entry_point);
659 fdt_setprop_u32(blob, node, "size", size);
661 fdt_setprop_string(blob, node, "type", type);
663 fdt_setprop_string(blob, node, "os", os);
665 fdt_setprop_string(blob, node, "arch", arch);
670 /* Resize the fdt to its actual size + a bit of padding */
671 int fdt_shrink_to_minimum(void *blob, uint extrasize)
682 total = fdt_num_mem_rsv(blob);
683 for (i = 0; i < total; i++) {
684 fdt_get_mem_rsv(blob, i, &addr, &size);
685 if (addr == (uintptr_t)blob) {
686 fdt_del_mem_rsv(blob, i);
693 * Calculate the actual size of the fdt
694 * plus the size needed for 5 fdt_add_mem_rsv, one
695 * for the fdt itself and 4 for a possible initrd
696 * ((initrd-start + initrd-end) * 2 (name & value))
698 actualsize = fdt_off_dt_strings(blob) +
699 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
701 actualsize += extrasize;
702 /* Make it so the fdt ends on a page boundary */
703 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
704 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
706 /* Change the fdt header to reflect the correct size */
707 fdt_set_totalsize(blob, actualsize);
710 /* Add the new reservation */
711 ret = fdt_add_mem_rsv(blob, map_to_sysmem(blob), actualsize);
720 * fdt_delete_disabled_nodes: Delete all nodes with status == "disabled"
722 * @blob: ptr to device tree
724 int fdt_delete_disabled_nodes(void *blob)
729 offset = fdt_node_offset_by_prop_value(blob, -1, "status",
734 ret = fdt_del_node(blob, offset);
743 #define CFG_SYS_PCI_NR_INBOUND_WIN 4
745 #define FDT_PCI_PREFETCH (0x40000000)
746 #define FDT_PCI_MEM32 (0x02000000)
747 #define FDT_PCI_IO (0x01000000)
748 #define FDT_PCI_MEM64 (0x03000000)
750 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
752 int addrcell, sizecell, len, r;
754 /* sized based on pci addr cells, size-cells, & address-cells */
755 u32 dma_ranges[(3 + 2 + 2) * CFG_SYS_PCI_NR_INBOUND_WIN];
757 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
758 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
760 dma_range = &dma_ranges[0];
761 for (r = 0; r < hose->region_count; r++) {
762 u64 bus_start, phys_start, size;
764 /* skip if !PCI_REGION_SYS_MEMORY */
765 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
768 bus_start = (u64)hose->regions[r].bus_start;
769 phys_start = (u64)hose->regions[r].phys_start;
770 size = (u64)hose->regions[r].size;
773 if (size >= 0x100000000ull)
774 dma_range[0] |= cpu_to_fdt32(FDT_PCI_MEM64);
776 dma_range[0] |= cpu_to_fdt32(FDT_PCI_MEM32);
777 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
778 dma_range[0] |= cpu_to_fdt32(FDT_PCI_PREFETCH);
779 #ifdef CONFIG_SYS_PCI_64BIT
780 dma_range[1] = cpu_to_fdt32(bus_start >> 32);
784 dma_range[2] = cpu_to_fdt32(bus_start & 0xffffffff);
787 dma_range[3] = cpu_to_fdt32(phys_start >> 32);
788 dma_range[4] = cpu_to_fdt32(phys_start & 0xffffffff);
790 dma_range[3] = cpu_to_fdt32(phys_start & 0xffffffff);
794 dma_range[3 + addrcell + 0] =
795 cpu_to_fdt32(size >> 32);
796 dma_range[3 + addrcell + 1] =
797 cpu_to_fdt32(size & 0xffffffff);
799 dma_range[3 + addrcell + 0] =
800 cpu_to_fdt32(size & 0xffffffff);
803 dma_range += (3 + addrcell + sizecell);
806 len = dma_range - &dma_ranges[0];
808 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
814 int fdt_increase_size(void *fdt, int add_len)
818 newlen = fdt_totalsize(fdt) + add_len;
820 /* Open in place with a new len */
821 return fdt_open_into(fdt, fdt, newlen);
824 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
825 #include <jffs2/load_kernel.h>
826 #include <mtd_node.h>
828 static int fdt_del_subnodes(const void *blob, int parent_offset)
833 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
834 (off >= 0) && (ndepth > 0);
835 off = fdt_next_node(blob, off, &ndepth)) {
837 debug("delete %s: offset: %x\n",
838 fdt_get_name(blob, off, 0), off);
839 ret = fdt_del_node((void *)blob, off);
841 printf("Can't delete node: %s\n",
853 static int fdt_del_partitions(void *blob, int parent_offset)
860 off = fdt_next_node(blob, parent_offset, &ndepth);
861 if (off > 0 && ndepth == 1) {
862 prop = fdt_getprop(blob, off, "label", NULL);
865 * Could not find label property, nand {}; node?
866 * Check subnode, delete partitions there if any.
868 return fdt_del_partitions(blob, off);
870 ret = fdt_del_subnodes(blob, parent_offset);
872 printf("Can't remove subnodes: %s\n",
881 static int fdt_node_set_part_info(void *blob, int parent_offset,
882 struct mtd_device *dev)
884 struct list_head *pentry;
885 struct part_info *part;
891 ret = fdt_del_partitions(blob, parent_offset);
896 * Check if size/address is 1 or 2 cells.
897 * We assume #address-cells and #size-cells have same value.
899 sizecell = fdt_getprop_u32_default_node(blob, parent_offset,
900 0, "#size-cells", 1);
903 * Check if it is nand {}; subnode, adjust
904 * the offset in this case
906 off = fdt_next_node(blob, parent_offset, &ndepth);
907 if (off > 0 && ndepth == 1)
911 list_for_each_prev(pentry, &dev->parts) {
914 part = list_entry(pentry, struct part_info, link);
916 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
917 part_num, part->name, part->size,
918 part->offset, part->mask_flags);
920 sprintf(buf, "partition@%llx", part->offset);
922 ret = fdt_add_subnode(blob, parent_offset, buf);
923 if (ret == -FDT_ERR_NOSPACE) {
924 ret = fdt_increase_size(blob, 512);
929 } else if (ret < 0) {
930 printf("Can't add partition node: %s\n",
936 /* Check MTD_WRITEABLE_CMD flag */
937 if (part->mask_flags & 1) {
939 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
940 if (ret == -FDT_ERR_NOSPACE) {
941 ret = fdt_increase_size(blob, 512);
952 ret = fdt_setprop_u64(blob, newoff,
953 "reg", part->offset);
955 ret = fdt_appendprop_u64(blob, newoff,
958 ret = fdt_setprop_u32(blob, newoff,
959 "reg", part->offset);
961 ret = fdt_appendprop_u32(blob, newoff,
965 if (ret == -FDT_ERR_NOSPACE) {
966 ret = fdt_increase_size(blob, 512);
975 ret = fdt_setprop_string(blob, newoff, "label", part->name);
976 if (ret == -FDT_ERR_NOSPACE) {
977 ret = fdt_increase_size(blob, 512);
989 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
992 printf("Can't add property: %s\n", fdt_strerror(ret));
997 * Update partitions in nor/nand nodes using info from
998 * mtdparts environment variable. The nodes to update are
999 * specified by node_info structure which contains mtd device
1000 * type and compatible string: E. g. the board code in
1001 * ft_board_setup() could use:
1003 * struct node_info nodes[] = {
1004 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
1005 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
1008 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
1010 void fdt_fixup_mtdparts(void *blob, const struct node_info *node_info,
1013 struct mtd_device *dev;
1016 bool inited = false;
1018 for (i = 0; i < node_info_size; i++) {
1021 fdt_for_each_node_by_compatible(noff, blob, -1,
1022 node_info[i].compat) {
1025 prop = fdt_getprop(blob, noff, "status", NULL);
1026 if (prop && !strcmp(prop, "disabled"))
1029 debug("%s: %s, mtd dev type %d\n",
1030 fdt_get_name(blob, noff, 0),
1031 node_info[i].compat, node_info[i].type);
1034 if (mtdparts_init() != 0)
1039 dev = device_find(node_info[i].type, idx++);
1041 parts = fdt_subnode_offset(blob, noff,
1046 if (fdt_node_set_part_info(blob, parts, dev))
1047 return; /* return on error */
1054 int fdt_copy_fixed_partitions(void *blob)
1056 ofnode node, subnode;
1057 int off, suboff, res;
1059 int address_cells, size_cells;
1060 u8 i, j, child_count;
1062 node = ofnode_by_compatible(ofnode_null(), "fixed-partitions");
1063 while (ofnode_valid(node)) {
1064 /* copy the U-Boot fixed partition */
1065 address_cells = ofnode_read_simple_addr_cells(node);
1066 size_cells = ofnode_read_simple_size_cells(node);
1068 res = ofnode_get_path(ofnode_get_parent(node), path, sizeof(path));
1072 off = fdt_path_offset(blob, path);
1076 off = fdt_find_or_add_subnode(blob, off, "partitions");
1077 res = fdt_setprop_string(blob, off, "compatible", "fixed-partitions");
1081 res = fdt_setprop_u32(blob, off, "#address-cells", address_cells);
1085 res = fdt_setprop_u32(blob, off, "#size-cells", size_cells);
1090 * parse partition in reverse order as fdt_find_or_add_subnode() only
1091 * insert the new node after the parent's properties
1093 child_count = ofnode_get_child_count(node);
1094 for (i = child_count; i > 0 ; i--) {
1095 subnode = ofnode_first_subnode(node);
1096 if (!ofnode_valid(subnode))
1099 for (j = 0; (j < i - 1); j++)
1100 subnode = ofnode_next_subnode(subnode);
1102 if (!ofnode_valid(subnode))
1108 suboff = fdt_find_or_add_subnode(blob, off, ofnode_get_name(subnode));
1109 res = fdt_setprop_string(blob, suboff, "label",
1110 ofnode_read_string(subnode, "label"));
1114 reg = ofnode_get_property(subnode, "reg", &len);
1115 res = fdt_setprop(blob, suboff, "reg", reg, len);
1120 /* go to next fixed-partitions node */
1121 node = ofnode_by_compatible(node, "fixed-partitions");
1127 void fdt_del_node_and_alias(void *blob, const char *alias)
1129 int off = fdt_path_offset(blob, alias);
1134 fdt_del_node(blob, off);
1136 off = fdt_path_offset(blob, "/aliases");
1137 fdt_delprop(blob, off, alias);
1140 /* Max address size we deal with */
1141 #define OF_MAX_ADDR_CELLS 4
1142 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
1147 static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
1151 printf(" %08x", *(addr++));
1155 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
1159 * struct of_bus - Callbacks for bus specific translators
1160 * @name: A string used to identify this bus in debug output.
1161 * @addresses: The name of the DT property from which addresses are
1162 * to be read, typically "reg".
1163 * @match: Return non-zero if the node whose parent is at
1164 * parentoffset in the FDT blob corresponds to a bus
1165 * of this type, otherwise return zero. If NULL a match
1167 * @count_cells:Count how many cells (be32 values) a node whose parent
1168 * is at parentoffset in the FDT blob will require to
1169 * represent its address (written to *addrc) & size
1170 * (written to *sizec).
1171 * @map: Map the address addr from the address space of this
1172 * bus to that of its parent, making use of the ranges
1173 * read from DT to an array at range. na and ns are the
1174 * number of cells (be32 values) used to hold and address
1175 * or size, respectively, for this bus. pna is the number
1176 * of cells used to hold an address for the parent bus.
1177 * Returns the address in the address space of the parent
1179 * @translate: Update the value of the address cells at addr within an
1180 * FDT by adding offset to it. na specifies the number of
1181 * cells used to hold the address being translated. Returns
1182 * zero on success, non-zero on error.
1184 * Each bus type will include a struct of_bus in the of_busses array,
1185 * providing implementations of some or all of the functions used to
1186 * match the bus & handle address translation for its children.
1190 const char *addresses;
1191 int (*match)(const void *blob, int parentoffset);
1192 void (*count_cells)(const void *blob, int parentoffset,
1193 int *addrc, int *sizec);
1194 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
1195 int na, int ns, int pna);
1196 int (*translate)(fdt32_t *addr, u64 offset, int na);
1199 /* Default translator (generic bus) */
1200 void fdt_support_default_count_cells(const void *blob, int parentoffset,
1201 int *addrc, int *sizec)
1203 const fdt32_t *prop;
1206 *addrc = fdt_address_cells(blob, parentoffset);
1209 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
1211 *sizec = be32_to_cpup(prop);
1217 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
1218 int na, int ns, int pna)
1222 cp = fdt_read_number(range, na);
1223 s = fdt_read_number(range + na + pna, ns);
1224 da = fdt_read_number(addr, na);
1226 debug("OF: default map, cp=%llx, s=%llx, da=%llx\n", cp, s, da);
1228 if (da < cp || da >= (cp + s))
1233 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
1235 u64 a = fdt_read_number(addr, na);
1236 memset(addr, 0, na * 4);
1239 addr[na - 2] = cpu_to_fdt32(a >> 32);
1240 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
1245 #ifdef CONFIG_OF_ISA_BUS
1247 /* ISA bus translator */
1248 static int of_bus_isa_match(const void *blob, int parentoffset)
1252 name = fdt_get_name(blob, parentoffset, NULL);
1256 return !strcmp(name, "isa");
1259 static void of_bus_isa_count_cells(const void *blob, int parentoffset,
1260 int *addrc, int *sizec)
1268 static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range,
1269 int na, int ns, int pna)
1273 /* Check address type match */
1274 if ((addr[0] ^ range[0]) & cpu_to_be32(1))
1277 cp = fdt_read_number(range + 1, na - 1);
1278 s = fdt_read_number(range + na + pna, ns);
1279 da = fdt_read_number(addr + 1, na - 1);
1281 debug("OF: ISA map, cp=%llx, s=%llx, da=%llx\n", cp, s, da);
1283 if (da < cp || da >= (cp + s))
1288 static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na)
1290 return of_bus_default_translate(addr + 1, offset, na - 1);
1293 #endif /* CONFIG_OF_ISA_BUS */
1295 /* Array of bus specific translators */
1296 static struct of_bus of_busses[] = {
1297 #ifdef CONFIG_OF_ISA_BUS
1302 .match = of_bus_isa_match,
1303 .count_cells = of_bus_isa_count_cells,
1304 .map = of_bus_isa_map,
1305 .translate = of_bus_isa_translate,
1307 #endif /* CONFIG_OF_ISA_BUS */
1312 .count_cells = fdt_support_default_count_cells,
1313 .map = of_bus_default_map,
1314 .translate = of_bus_default_translate,
1318 static struct of_bus *of_match_bus(const void *blob, int parentoffset)
1322 if (ARRAY_SIZE(of_busses) == 1)
1325 for (bus = of_busses; bus; bus++) {
1326 if (!bus->match || bus->match(blob, parentoffset))
1331 * We should always have matched the default bus at least, since
1332 * it has a NULL match field. If we didn't then it somehow isn't
1333 * in the of_busses array or something equally catastrophic has
1340 static int of_translate_one(const void *blob, int parent, struct of_bus *bus,
1341 struct of_bus *pbus, fdt32_t *addr,
1342 int na, int ns, int pna, const char *rprop)
1344 const fdt32_t *ranges;
1347 u64 offset = OF_BAD_ADDR;
1349 /* Normally, an absence of a "ranges" property means we are
1350 * crossing a non-translatable boundary, and thus the addresses
1351 * below the current not cannot be converted to CPU physical ones.
1352 * Unfortunately, while this is very clear in the spec, it's not
1353 * what Apple understood, and they do have things like /uni-n or
1354 * /ht nodes with no "ranges" property and a lot of perfectly
1355 * useable mapped devices below them. Thus we treat the absence of
1356 * "ranges" as equivalent to an empty "ranges" property which means
1357 * a 1:1 translation at that level. It's up to the caller not to try
1358 * to translate addresses that aren't supposed to be translated in
1359 * the first place. --BenH.
1361 ranges = fdt_getprop(blob, parent, rprop, &rlen);
1362 if (ranges == NULL || rlen == 0) {
1363 offset = fdt_read_number(addr, na);
1364 memset(addr, 0, pna * 4);
1365 debug("OF: no ranges, 1:1 translation\n");
1369 debug("OF: walking ranges...\n");
1371 /* Now walk through the ranges */
1373 rone = na + pna + ns;
1374 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1375 offset = bus->map(addr, ranges, na, ns, pna);
1376 if (offset != OF_BAD_ADDR)
1379 if (offset == OF_BAD_ADDR) {
1380 debug("OF: not found !\n");
1383 memcpy(addr, ranges + na, 4 * pna);
1386 of_dump_addr("OF: parent translation for:", addr, pna);
1387 debug("OF: with offset: %llu\n", offset);
1389 /* Translate it into parent bus space */
1390 return pbus->translate(addr, offset, pna);
1394 * Translate an address from the device-tree into a CPU physical address,
1395 * this walks up the tree and applies the various bus mappings on the
1398 * Note: We consider that crossing any level with #size-cells == 0 to mean
1399 * that translation is impossible (that is we are not dealing with a value
1400 * that can be mapped to a cpu physical address). This is not really specified
1401 * that way, but this is traditionally the way IBM at least do things
1403 static u64 __of_translate_address(const void *blob, int node_offset,
1404 const fdt32_t *in_addr, const char *rprop)
1407 struct of_bus *bus, *pbus;
1408 fdt32_t addr[OF_MAX_ADDR_CELLS];
1409 int na, ns, pna, pns;
1410 u64 result = OF_BAD_ADDR;
1412 debug("OF: ** translation for device %s **\n",
1413 fdt_get_name(blob, node_offset, NULL));
1415 /* Get parent & match bus type */
1416 parent = fdt_parent_offset(blob, node_offset);
1419 bus = of_match_bus(blob, parent);
1421 /* Cound address cells & copy address locally */
1422 bus->count_cells(blob, parent, &na, &ns);
1423 if (!OF_CHECK_COUNTS(na, ns)) {
1424 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1425 fdt_get_name(blob, node_offset, NULL));
1428 memcpy(addr, in_addr, na * 4);
1430 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1431 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1432 of_dump_addr("OF: translating address:", addr, na);
1436 /* Switch to parent bus */
1437 node_offset = parent;
1438 parent = fdt_parent_offset(blob, node_offset);
1440 /* If root, we have finished */
1442 debug("OF: reached root node\n");
1443 result = fdt_read_number(addr, na);
1447 /* Get new parent bus and counts */
1448 pbus = of_match_bus(blob, parent);
1449 pbus->count_cells(blob, parent, &pna, &pns);
1450 if (!OF_CHECK_COUNTS(pna, pns)) {
1451 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1452 fdt_get_name(blob, node_offset, NULL));
1456 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1457 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1459 /* Apply bus translation */
1460 if (of_translate_one(blob, node_offset, bus, pbus,
1461 addr, na, ns, pna, rprop))
1464 /* Complete the move up one level */
1469 of_dump_addr("OF: one level translation:", addr, na);
1476 u64 fdt_translate_address(const void *blob, int node_offset,
1477 const fdt32_t *in_addr)
1479 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1482 u64 fdt_translate_dma_address(const void *blob, int node_offset,
1483 const fdt32_t *in_addr)
1485 return __of_translate_address(blob, node_offset, in_addr, "dma-ranges");
1488 int fdt_get_dma_range(const void *blob, int node, phys_addr_t *cpu,
1489 dma_addr_t *bus, u64 *size)
1491 bool found_dma_ranges = false;
1492 struct of_bus *bus_node;
1493 const fdt32_t *ranges;
1494 int na, ns, pna, pns;
1499 /* Find the closest dma-ranges property */
1500 while (parent >= 0) {
1501 ranges = fdt_getprop(blob, parent, "dma-ranges", &len);
1503 /* Ignore empty ranges, they imply no translation required */
1504 if (ranges && len > 0)
1507 /* Once we find 'dma-ranges', then a missing one is an error */
1508 if (found_dma_ranges && !ranges) {
1514 found_dma_ranges = true;
1516 parent = fdt_parent_offset(blob, parent);
1519 if (!ranges || parent < 0) {
1520 debug("no dma-ranges found for node %s\n",
1521 fdt_get_name(blob, node, NULL));
1526 /* switch to that node */
1528 parent = fdt_parent_offset(blob, node);
1530 printf("Found dma-ranges in root node, shouldn't happen\n");
1535 /* Get the address sizes both for the bus and its parent */
1536 bus_node = of_match_bus(blob, node);
1537 bus_node->count_cells(blob, node, &na, &ns);
1538 if (!OF_CHECK_COUNTS(na, ns)) {
1539 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1540 fdt_get_name(blob, node, NULL));
1545 bus_node = of_match_bus(blob, parent);
1546 bus_node->count_cells(blob, parent, &pna, &pns);
1547 if (!OF_CHECK_COUNTS(pna, pns)) {
1548 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1549 fdt_get_name(blob, parent, NULL));
1554 *bus = fdt_read_number(ranges, na);
1555 *cpu = fdt_translate_dma_address(blob, node, ranges + na);
1556 *size = fdt_read_number(ranges + na + pna, ns);
1562 * fdt_node_offset_by_compat_reg: Find a node that matches compatible and
1563 * who's reg property matches a physical cpu address
1565 * @blob: ptr to device tree
1566 * @compat: compatible string to match
1567 * @compat_off: property name
1570 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1571 phys_addr_t compat_off)
1575 fdt_for_each_node_by_compatible(off, blob, -1, compat) {
1576 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
1577 if (reg && compat_off == fdt_translate_address(blob, off, reg))
1581 return -FDT_ERR_NOTFOUND;
1584 static int vnode_offset_by_pathf(void *blob, const char *fmt, va_list ap)
1589 len = vsnprintf(path, sizeof(path), fmt, ap);
1590 if (len < 0 || len + 1 > sizeof(path))
1591 return -FDT_ERR_NOSPACE;
1593 return fdt_path_offset(blob, path);
1597 * fdt_node_offset_by_pathf: Find node offset by sprintf formatted path
1599 * @blob: ptr to device tree
1601 * @ap: vsnprintf arguments
1603 int fdt_node_offset_by_pathf(void *blob, const char *fmt, ...)
1609 res = vnode_offset_by_pathf(blob, fmt, ap);
1616 * fdt_set_phandle: Create a phandle property for the given node
1618 * @fdt: ptr to device tree
1619 * @nodeoffset: node to update
1620 * @phandle: phandle value to set (must be unique)
1622 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
1627 int off = fdt_node_offset_by_phandle(fdt, phandle);
1629 if ((off >= 0) && (off != nodeoffset)) {
1632 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1633 printf("Trying to update node %s with phandle %u ",
1636 fdt_get_path(fdt, off, buf, sizeof(buf));
1637 printf("that already exists in node %s.\n", buf);
1638 return -FDT_ERR_BADPHANDLE;
1642 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1648 * fdt_create_phandle: Get or create a phandle property for the given node
1650 * @fdt: ptr to device tree
1651 * @nodeoffset: node to update
1653 unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
1655 /* see if there is a phandle already */
1656 uint32_t phandle = fdt_get_phandle(fdt, nodeoffset);
1658 /* if we got 0, means no phandle so create one */
1662 ret = fdt_generate_phandle(fdt, &phandle);
1664 printf("Can't generate phandle: %s\n",
1669 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1671 printf("Can't set phandle %u: %s\n", phandle,
1681 * fdt_create_phandle_by_compatible: Get or create a phandle for first node with
1684 * @fdt: ptr to device tree
1685 * @compat: node's compatible string
1687 unsigned int fdt_create_phandle_by_compatible(void *fdt, const char *compat)
1689 int offset = fdt_node_offset_by_compatible(fdt, -1, compat);
1692 printf("Can't find node with compatible \"%s\": %s\n", compat,
1693 fdt_strerror(offset));
1697 return fdt_create_phandle(fdt, offset);
1701 * fdt_create_phandle_by_pathf: Get or create a phandle for node given by
1702 * sprintf-formatted path
1704 * @fdt: ptr to device tree
1705 * @fmt, ...: path format string and arguments to pass to sprintf
1707 unsigned int fdt_create_phandle_by_pathf(void *fdt, const char *fmt, ...)
1713 offset = vnode_offset_by_pathf(fdt, fmt, ap);
1717 printf("Can't find node by given path: %s\n",
1718 fdt_strerror(offset));
1722 return fdt_create_phandle(fdt, offset);
1726 * fdt_set_node_status: Set status for the given node
1728 * @fdt: ptr to device tree
1729 * @nodeoffset: node to update
1730 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, FDT_STATUS_FAIL
1732 int fdt_set_node_status(void *fdt, int nodeoffset, enum fdt_status status)
1740 case FDT_STATUS_OKAY:
1741 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1743 case FDT_STATUS_DISABLED:
1744 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1746 case FDT_STATUS_FAIL:
1747 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1750 printf("Invalid fdt status: %x\n", status);
1759 * fdt_set_status_by_alias: Set status for the given node given an alias
1761 * @fdt: ptr to device tree
1762 * @alias: alias of node to update
1763 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, FDT_STATUS_FAIL
1765 int fdt_set_status_by_alias(void *fdt, const char* alias,
1766 enum fdt_status status)
1768 int offset = fdt_path_offset(fdt, alias);
1770 return fdt_set_node_status(fdt, offset, status);
1774 * fdt_set_status_by_compatible: Set node status for first node with given
1777 * @fdt: ptr to device tree
1778 * @compat: node's compatible string
1779 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, FDT_STATUS_FAIL
1781 int fdt_set_status_by_compatible(void *fdt, const char *compat,
1782 enum fdt_status status)
1784 int offset = fdt_node_offset_by_compatible(fdt, -1, compat);
1789 return fdt_set_node_status(fdt, offset, status);
1793 * fdt_set_status_by_pathf: Set node status for node given by sprintf-formatted
1796 * @fdt: ptr to device tree
1797 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, FDT_STATUS_FAIL
1798 * @fmt, ...: path format string and arguments to pass to sprintf
1800 int fdt_set_status_by_pathf(void *fdt, enum fdt_status status, const char *fmt,
1807 offset = vnode_offset_by_pathf(fdt, fmt, ap);
1813 return fdt_set_node_status(fdt, offset, status);
1817 * Verify the physical address of device tree node for a given alias
1819 * This function locates the device tree node of a given alias, and then
1820 * verifies that the physical address of that device matches the given
1821 * parameter. It displays a message if there is a mismatch.
1823 * Returns 1 on success, 0 on failure
1825 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1832 path = fdt_getprop(fdt, anode, alias, NULL);
1834 /* If there's no such alias, then it's not a failure */
1838 node = fdt_path_offset(fdt, path);
1840 printf("Warning: device tree alias '%s' points to invalid "
1841 "node %s.\n", alias, path);
1845 reg = fdt_getprop(fdt, node, "reg", &len);
1847 printf("Warning: device tree node '%s' has no address.\n",
1852 dt_addr = fdt_translate_address(fdt, node, reg);
1853 if (addr != dt_addr) {
1854 printf("Warning: U-Boot configured device %s at address %llu,\n"
1855 "but the device tree has it address %llx.\n",
1856 alias, addr, dt_addr);
1864 * Returns the base address of an SOC or PCI node
1866 u64 fdt_get_base_address(const void *fdt, int node)
1869 const fdt32_t *prop;
1871 prop = fdt_getprop(fdt, node, "reg", &size);
1873 return prop ? fdt_translate_address(fdt, node, prop) : OF_BAD_ADDR;
1877 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells,
1878 * or 3 cells specially for a PCI address.
1880 static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1881 uint64_t *val, int cells)
1883 const fdt32_t *prop32;
1884 const unaligned_fdt64_t *prop64;
1886 if ((cell_off + cells) > prop_len)
1887 return -FDT_ERR_NOSPACE;
1889 prop32 = &prop[cell_off];
1892 * Special handling for PCI address in PCI bus <ranges>
1894 * PCI child address is made up of 3 cells. Advance the cell offset
1895 * by 1 so that the PCI child address can be correctly read.
1899 prop64 = (const fdt64_t *)&prop[cell_off];
1903 *val = fdt32_to_cpu(*prop32);
1907 *val = fdt64_to_cpu(*prop64);
1910 return -FDT_ERR_NOSPACE;
1917 * fdt_read_range - Read a node's n'th range property
1919 * @fdt: ptr to device tree
1920 * @node: offset of node
1922 * @child_addr: pointer to storage for the "child address" field
1923 * @addr: pointer to storage for the CPU view translated physical start
1924 * @len: pointer to storage for the range length
1926 * Convenience function that reads and interprets a specific range out of
1927 * a number of the "ranges" property array.
1929 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1930 uint64_t *addr, uint64_t *len)
1932 int pnode = fdt_parent_offset(fdt, node);
1933 const fdt32_t *ranges;
1942 * The "ranges" property is an array of
1943 * { <child address> <parent address> <size in child address space> }
1945 * All 3 elements can span a diffent number of cells. Fetch their size.
1947 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1948 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1949 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1951 /* Now try to get the ranges property */
1952 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1954 return -FDT_ERR_NOTFOUND;
1955 ranges_len /= sizeof(uint32_t);
1957 /* Jump to the n'th entry */
1958 cell = n * (pacells + acells + scells);
1960 /* Read <child address> */
1962 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1969 /* Read <parent address> */
1971 *addr = fdt_translate_address(fdt, node, ranges + cell);
1974 /* Read <size in child address space> */
1976 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1985 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1987 * @fdt: ptr to device tree
1988 * @node: offset of the simplefb node
1989 * @base_address: framebuffer base address
1990 * @width: width in pixels
1991 * @height: height in pixels
1992 * @stride: bytes per line
1993 * @format: pixel format string
1995 * Convenience function to fill and enable a simplefb node.
1997 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1998 u32 height, u32 stride, const char *format)
2002 int i, addrc, sizec, ret;
2004 fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node),
2008 cells[i++] = cpu_to_fdt32(base_address >> 32);
2009 cells[i++] = cpu_to_fdt32(base_address);
2012 cells[i++] = cpu_to_fdt32(height * stride);
2014 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
2018 snprintf(name, sizeof(name), "framebuffer@%llx", base_address);
2019 ret = fdt_set_name(fdt, node, name);
2023 ret = fdt_setprop_u32(fdt, node, "width", width);
2027 ret = fdt_setprop_u32(fdt, node, "height", height);
2031 ret = fdt_setprop_u32(fdt, node, "stride", stride);
2035 ret = fdt_setprop_string(fdt, node, "format", format);
2039 ret = fdt_setprop_string(fdt, node, "status", "okay");
2047 * Update native-mode in display-timings from display environment variable.
2048 * The node to update are specified by path.
2050 int fdt_fixup_display(void *blob, const char *path, const char *display)
2054 if (!display || !path)
2055 return -FDT_ERR_NOTFOUND;
2057 toff = fdt_path_offset(blob, path);
2059 toff = fdt_subnode_offset(blob, toff, "display-timings");
2063 for (off = fdt_first_subnode(blob, toff);
2065 off = fdt_next_subnode(blob, off)) {
2066 uint32_t h = fdt_get_phandle(blob, off);
2067 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
2069 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
2070 return fdt_setprop_u32(blob, toff, "native-mode", h);
2075 #ifdef CONFIG_OF_LIBFDT_OVERLAY
2077 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting
2079 * @fdt: ptr to device tree
2080 * @fdto: ptr to device tree overlay
2082 * Convenience function to apply an overlay and display helpful messages
2083 * in the case of an error
2085 int fdt_overlay_apply_verbose(void *fdt, void *fdto)
2090 err = fdt_path_offset(fdt, "/__symbols__");
2091 has_symbols = err >= 0;
2093 err = fdt_overlay_apply(fdt, fdto);
2095 printf("failed on fdt_overlay_apply(): %s\n",
2098 printf("base fdt does did not have a /__symbols__ node\n");
2099 printf("make sure you've compiled with -@\n");
2107 * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
2109 * @blobp: Pointer to FDT pointer
2110 * Return: 1 if OK, 0 if bad (in which case *blobp is set to NULL)
2112 int fdt_valid(struct fdt_header **blobp)
2114 const void *blob = *blobp;
2118 printf("The address of the fdt is invalid (NULL).\n");
2122 err = fdt_check_header(blob);
2124 return 1; /* valid */
2127 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
2129 * Be more informative on bad version.
2131 if (err == -FDT_ERR_BADVERSION) {
2132 if (fdt_version(blob) <
2133 FDT_FIRST_SUPPORTED_VERSION) {
2134 printf(" - too old, fdt %d < %d",
2136 FDT_FIRST_SUPPORTED_VERSION);
2138 if (fdt_last_comp_version(blob) >
2139 FDT_LAST_SUPPORTED_VERSION) {
2140 printf(" - too new, fdt %d > %d",
2142 FDT_LAST_SUPPORTED_VERSION);