1 // SPDX-License-Identifier: GPL-2.0+
4 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
6 * Copyright 2010-2011 Freescale Semiconductor, Inc.
14 #include <stdio_dev.h>
15 #include <linux/ctype.h>
16 #include <linux/types.h>
17 #include <asm/global_data.h>
18 #include <linux/libfdt.h>
19 #include <fdt_support.h>
25 * fdt_getprop_u32_default_node - Return a node's property or a default
27 * @fdt: ptr to device tree
28 * @off: offset of node
29 * @cell: cell offset in property
30 * @prop: property name
31 * @dflt: default value if the property isn't found
33 * Convenience function to return a node's property or a default value if
34 * the property doesn't exist.
36 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
37 const char *prop, const u32 dflt)
42 val = fdt_getprop(fdt, off, prop, &len);
44 /* Check if property exists */
48 /* Check if property is long enough */
49 if (len < ((cell + 1) * sizeof(uint32_t)))
52 return fdt32_to_cpu(*val);
56 * fdt_getprop_u32_default - Find a node and return it's property or a default
58 * @fdt: ptr to device tree
60 * @prop: property name
61 * @dflt: default value if the property isn't found
63 * Convenience function to find a node and return it's property or a
64 * default value if it doesn't exist.
66 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
67 const char *prop, const u32 dflt)
71 off = fdt_path_offset(fdt, path);
75 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
79 * fdt_find_and_setprop: Find a node and set it's property
81 * @fdt: ptr to device tree
83 * @prop: property name
84 * @val: ptr to new value
85 * @len: length of new property value
86 * @create: flag to create the property if it doesn't exist
88 * Convenience function to directly set a property given the path to the node.
90 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
91 const void *val, int len, int create)
93 int nodeoff = fdt_path_offset(fdt, node);
98 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
99 return 0; /* create flag not set; so exit quietly */
101 return fdt_setprop(fdt, nodeoff, prop, val, len);
105 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
107 * @fdt: pointer to the device tree blob
108 * @parentoffset: structure block offset of a node
109 * @name: name of the subnode to locate
111 * fdt_subnode_offset() finds a subnode of the node with a given name.
112 * If the subnode does not exist, it will be created.
114 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name)
118 offset = fdt_subnode_offset(fdt, parentoffset, name);
120 if (offset == -FDT_ERR_NOTFOUND)
121 offset = fdt_add_subnode(fdt, parentoffset, name);
124 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset));
129 #if defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
130 static int fdt_fixup_stdout(void *fdt, int chosenoff)
134 char sername[9] = { 0 };
137 char tmp[256]; /* long enough */
139 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
141 aliasoff = fdt_path_offset(fdt, "/aliases");
147 path = fdt_getprop(fdt, aliasoff, sername, &len);
153 /* fdt_setprop may break "path" so we copy it to tmp buffer */
154 memcpy(tmp, path, len);
156 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len);
158 printf("WARNING: could not set linux,stdout-path %s.\n",
164 printf("WARNING: %s: could not read %s alias: %s\n",
165 __func__, sername, fdt_strerror(err));
170 static int fdt_fixup_stdout(void *fdt, int chosenoff)
176 static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
177 uint64_t val, int is_u64)
180 return fdt_setprop_u64(fdt, nodeoffset, name, val);
182 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
185 int fdt_root(void *fdt)
190 err = fdt_check_header(fdt);
192 printf("fdt_root: %s\n", fdt_strerror(err));
196 serial = env_get("serial#");
198 err = fdt_setprop(fdt, 0, "serial-number", serial,
202 printf("WARNING: could not set serial-number %s.\n",
211 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
218 /* just return if the size of initrd is zero */
219 if (initrd_start == initrd_end)
222 /* find or create "/chosen" node. */
223 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
227 total = fdt_num_mem_rsv(fdt);
230 * Look for an existing entry and update it. If we don't find
231 * the entry, we will j be the next available slot.
233 for (j = 0; j < total; j++) {
234 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
235 if (addr == initrd_start) {
236 fdt_del_mem_rsv(fdt, j);
241 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
243 printf("fdt_initrd: %s\n", fdt_strerror(err));
247 is_u64 = (fdt_address_cells(fdt, 0) == 2);
249 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
250 (uint64_t)initrd_start, is_u64);
253 printf("WARNING: could not set linux,initrd-start %s.\n",
258 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
259 (uint64_t)initrd_end, is_u64);
262 printf("WARNING: could not set linux,initrd-end %s.\n",
272 * board_fdt_chosen_bootargs - boards may override this function to use
273 * alternative kernel command line arguments
275 __weak char *board_fdt_chosen_bootargs(void)
277 return env_get("bootargs");
280 int fdt_chosen(void *fdt)
284 char *str; /* used to set string properties */
286 err = fdt_check_header(fdt);
288 printf("fdt_chosen: %s\n", fdt_strerror(err));
292 /* find or create "/chosen" node. */
293 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
297 str = board_fdt_chosen_bootargs();
300 err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
303 printf("WARNING: could not set bootargs %s.\n",
309 /* add u-boot version */
310 err = fdt_setprop(fdt, nodeoffset, "u-boot,version", PLAIN_VERSION,
311 strlen(PLAIN_VERSION) + 1);
313 printf("WARNING: could not set u-boot,version %s.\n",
318 return fdt_fixup_stdout(fdt, nodeoffset);
321 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
322 const void *val, int len, int create)
326 debug("Updating property '%s/%s' = ", path, prop);
327 for (i = 0; i < len; i++)
328 debug(" %.2x", *(u8*)(val+i));
331 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
333 printf("Unable to update property %s:%s, err=%s\n",
334 path, prop, fdt_strerror(rc));
337 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
340 fdt32_t tmp = cpu_to_fdt32(val);
341 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
344 void do_fixup_by_prop(void *fdt,
345 const char *pname, const void *pval, int plen,
346 const char *prop, const void *val, int len,
352 debug("Updating property '%s' = ", prop);
353 for (i = 0; i < len; i++)
354 debug(" %.2x", *(u8*)(val+i));
357 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
358 while (off != -FDT_ERR_NOTFOUND) {
359 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
360 fdt_setprop(fdt, off, prop, val, len);
361 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
365 void do_fixup_by_prop_u32(void *fdt,
366 const char *pname, const void *pval, int plen,
367 const char *prop, u32 val, int create)
369 fdt32_t tmp = cpu_to_fdt32(val);
370 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
373 void do_fixup_by_compat(void *fdt, const char *compat,
374 const char *prop, const void *val, int len, int create)
379 debug("Updating property '%s' = ", prop);
380 for (i = 0; i < len; i++)
381 debug(" %.2x", *(u8*)(val+i));
384 fdt_for_each_node_by_compatible(off, fdt, -1, compat)
385 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
386 fdt_setprop(fdt, off, prop, val, len);
389 void do_fixup_by_compat_u32(void *fdt, const char *compat,
390 const char *prop, u32 val, int create)
392 fdt32_t tmp = cpu_to_fdt32(val);
393 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
396 #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
398 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
400 static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
404 int address_cells = fdt_address_cells(fdt, 0);
405 int size_cells = fdt_size_cells(fdt, 0);
408 for (i = 0; i < n; i++) {
409 if (address_cells == 2)
410 *(fdt64_t *)p = cpu_to_fdt64(address[i]);
412 *(fdt32_t *)p = cpu_to_fdt32(address[i]);
413 p += 4 * address_cells;
416 *(fdt64_t *)p = cpu_to_fdt64(size[i]);
418 *(fdt32_t *)p = cpu_to_fdt32(size[i]);
422 return p - (char *)buf;
425 #if CONFIG_NR_DRAM_BANKS > 4
426 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
428 #define MEMORY_BANKS_MAX 4
432 * fdt_fixup_memory_banks - Update DT memory node
433 * @blob: Pointer to DT blob
434 * @start: Pointer to memory start addresses array
435 * @size: Pointer to memory sizes array
436 * @banks: Number of memory banks
438 * Return: 0 on success, negative value on failure
440 * Based on the passed number of banks and arrays, the function is able to
441 * update existing DT memory nodes to match run time detected/changed memory
442 * configuration. Implementation is handling one specific case with only one
443 * memory node where multiple tuples could be added/updated.
444 * The case where multiple memory nodes with a single tuple (base, size) are
445 * used, this function is only updating the first memory node without removing
448 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
452 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
454 if (banks > MEMORY_BANKS_MAX) {
455 printf("%s: num banks %d exceeds hardcoded limit %d."
456 " Recompile with higher MEMORY_BANKS_MAX?\n",
457 __FUNCTION__, banks, MEMORY_BANKS_MAX);
461 err = fdt_check_header(blob);
463 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
467 /* find or create "/memory" node. */
468 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
472 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
475 printf("WARNING: could not set %s %s.\n", "device_type",
480 for (i = 0; i < banks; i++) {
481 if (start[i] == 0 && size[i] == 0)
490 len = fdt_pack_reg(blob, tmp, start, size, banks);
492 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
494 printf("WARNING: could not set %s %s.\n",
495 "reg", fdt_strerror(err));
501 int fdt_set_usable_memory(void *blob, u64 start[], u64 size[], int areas)
505 u8 tmp[8 * 16]; /* Up to 64-bit address + 64-bit size */
508 printf("%s: num areas %d exceeds hardcoded limit %d\n",
513 err = fdt_check_header(blob);
515 printf("%s: %s\n", __func__, fdt_strerror(err));
519 /* find or create "/memory" node. */
520 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
524 len = fdt_pack_reg(blob, tmp, start, size, areas);
526 err = fdt_setprop(blob, nodeoffset, "linux,usable-memory", tmp, len);
528 printf("WARNING: could not set %s %s.\n",
529 "reg", fdt_strerror(err));
537 int fdt_fixup_memory(void *blob, u64 start, u64 size)
539 return fdt_fixup_memory_banks(blob, &start, &size, 1);
542 void fdt_fixup_ethernet(void *fdt)
548 unsigned char mac_addr[ARP_HLEN];
550 #ifdef FDT_SEQ_MACADDR_FROM_ENV
552 const struct fdt_property *fdt_prop;
555 if (fdt_path_offset(fdt, "/aliases") < 0)
558 /* Cycle through all aliases */
559 for (prop = 0; ; prop++) {
562 /* FDT might have been edited, recompute the offset */
563 offset = fdt_first_property_offset(fdt,
564 fdt_path_offset(fdt, "/aliases"));
565 /* Select property number 'prop' */
566 for (j = 0; j < prop; j++)
567 offset = fdt_next_property_offset(fdt, offset);
572 path = fdt_getprop_by_offset(fdt, offset, &name, NULL);
573 if (!strncmp(name, "ethernet", 8)) {
574 /* Treat plain "ethernet" same as "ethernet0". */
575 if (!strcmp(name, "ethernet")
576 #ifdef FDT_SEQ_MACADDR_FROM_ENV
577 || !strcmp(name, "ethernet0")
581 #ifndef FDT_SEQ_MACADDR_FROM_ENV
583 i = trailing_strtol(name);
587 strcpy(mac, "ethaddr");
589 sprintf(mac, "eth%daddr", i);
593 #ifdef FDT_SEQ_MACADDR_FROM_ENV
594 nodeoff = fdt_path_offset(fdt, path);
595 fdt_prop = fdt_get_property(fdt, nodeoff, "status",
597 if (fdt_prop && !strcmp(fdt_prop->data, "disabled"))
605 for (j = 0; j < 6; j++) {
607 hextoul(tmp, &end) : 0;
609 tmp = (*end) ? end + 1 : end;
612 do_fixup_by_path(fdt, path, "mac-address",
614 do_fixup_by_path(fdt, path, "local-mac-address",
620 int fdt_record_loadable(void *blob, u32 index, const char *name,
621 uintptr_t load_addr, u32 size, uintptr_t entry_point,
622 const char *type, const char *os, const char *arch)
626 err = fdt_check_header(blob);
628 printf("%s: %s\n", __func__, fdt_strerror(err));
632 /* find or create "/fit-images" node */
633 node = fdt_find_or_add_subnode(blob, 0, "fit-images");
637 /* find or create "/fit-images/<name>" node */
638 node = fdt_find_or_add_subnode(blob, node, name);
642 fdt_setprop_u64(blob, node, "load", load_addr);
643 if (entry_point != -1)
644 fdt_setprop_u64(blob, node, "entry", entry_point);
645 fdt_setprop_u32(blob, node, "size", size);
647 fdt_setprop_string(blob, node, "type", type);
649 fdt_setprop_string(blob, node, "os", os);
651 fdt_setprop_string(blob, node, "arch", arch);
656 /* Resize the fdt to its actual size + a bit of padding */
657 int fdt_shrink_to_minimum(void *blob, uint extrasize)
668 total = fdt_num_mem_rsv(blob);
669 for (i = 0; i < total; i++) {
670 fdt_get_mem_rsv(blob, i, &addr, &size);
671 if (addr == (uintptr_t)blob) {
672 fdt_del_mem_rsv(blob, i);
679 * Calculate the actual size of the fdt
680 * plus the size needed for 5 fdt_add_mem_rsv, one
681 * for the fdt itself and 4 for a possible initrd
682 * ((initrd-start + initrd-end) * 2 (name & value))
684 actualsize = fdt_off_dt_strings(blob) +
685 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
687 actualsize += extrasize;
688 /* Make it so the fdt ends on a page boundary */
689 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
690 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
692 /* Change the fdt header to reflect the correct size */
693 fdt_set_totalsize(blob, actualsize);
696 /* Add the new reservation */
697 ret = fdt_add_mem_rsv(blob, map_to_sysmem(blob), actualsize);
706 * fdt_delete_disabled_nodes: Delete all nodes with status == "disabled"
708 * @blob: ptr to device tree
710 int fdt_delete_disabled_nodes(void *blob)
715 offset = fdt_node_offset_by_prop_value(blob, -1, "status",
720 ret = fdt_del_node(blob, offset);
729 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
731 #define FDT_PCI_PREFETCH (0x40000000)
732 #define FDT_PCI_MEM32 (0x02000000)
733 #define FDT_PCI_IO (0x01000000)
734 #define FDT_PCI_MEM64 (0x03000000)
736 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
738 int addrcell, sizecell, len, r;
740 /* sized based on pci addr cells, size-cells, & address-cells */
741 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
743 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
744 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
746 dma_range = &dma_ranges[0];
747 for (r = 0; r < hose->region_count; r++) {
748 u64 bus_start, phys_start, size;
750 /* skip if !PCI_REGION_SYS_MEMORY */
751 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
754 bus_start = (u64)hose->regions[r].bus_start;
755 phys_start = (u64)hose->regions[r].phys_start;
756 size = (u64)hose->regions[r].size;
759 if (size >= 0x100000000ull)
760 dma_range[0] |= cpu_to_fdt32(FDT_PCI_MEM64);
762 dma_range[0] |= cpu_to_fdt32(FDT_PCI_MEM32);
763 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
764 dma_range[0] |= cpu_to_fdt32(FDT_PCI_PREFETCH);
765 #ifdef CONFIG_SYS_PCI_64BIT
766 dma_range[1] = cpu_to_fdt32(bus_start >> 32);
770 dma_range[2] = cpu_to_fdt32(bus_start & 0xffffffff);
773 dma_range[3] = cpu_to_fdt32(phys_start >> 32);
774 dma_range[4] = cpu_to_fdt32(phys_start & 0xffffffff);
776 dma_range[3] = cpu_to_fdt32(phys_start & 0xffffffff);
780 dma_range[3 + addrcell + 0] =
781 cpu_to_fdt32(size >> 32);
782 dma_range[3 + addrcell + 1] =
783 cpu_to_fdt32(size & 0xffffffff);
785 dma_range[3 + addrcell + 0] =
786 cpu_to_fdt32(size & 0xffffffff);
789 dma_range += (3 + addrcell + sizecell);
792 len = dma_range - &dma_ranges[0];
794 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
800 int fdt_increase_size(void *fdt, int add_len)
804 newlen = fdt_totalsize(fdt) + add_len;
806 /* Open in place with a new len */
807 return fdt_open_into(fdt, fdt, newlen);
810 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
811 #include <jffs2/load_kernel.h>
812 #include <mtd_node.h>
814 static int fdt_del_subnodes(const void *blob, int parent_offset)
819 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
820 (off >= 0) && (ndepth > 0);
821 off = fdt_next_node(blob, off, &ndepth)) {
823 debug("delete %s: offset: %x\n",
824 fdt_get_name(blob, off, 0), off);
825 ret = fdt_del_node((void *)blob, off);
827 printf("Can't delete node: %s\n",
839 static int fdt_del_partitions(void *blob, int parent_offset)
846 off = fdt_next_node(blob, parent_offset, &ndepth);
847 if (off > 0 && ndepth == 1) {
848 prop = fdt_getprop(blob, off, "label", NULL);
851 * Could not find label property, nand {}; node?
852 * Check subnode, delete partitions there if any.
854 return fdt_del_partitions(blob, off);
856 ret = fdt_del_subnodes(blob, parent_offset);
858 printf("Can't remove subnodes: %s\n",
867 static int fdt_node_set_part_info(void *blob, int parent_offset,
868 struct mtd_device *dev)
870 struct list_head *pentry;
871 struct part_info *part;
877 ret = fdt_del_partitions(blob, parent_offset);
882 * Check if size/address is 1 or 2 cells.
883 * We assume #address-cells and #size-cells have same value.
885 sizecell = fdt_getprop_u32_default_node(blob, parent_offset,
886 0, "#size-cells", 1);
889 * Check if it is nand {}; subnode, adjust
890 * the offset in this case
892 off = fdt_next_node(blob, parent_offset, &ndepth);
893 if (off > 0 && ndepth == 1)
897 list_for_each_prev(pentry, &dev->parts) {
900 part = list_entry(pentry, struct part_info, link);
902 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
903 part_num, part->name, part->size,
904 part->offset, part->mask_flags);
906 sprintf(buf, "partition@%llx", part->offset);
908 ret = fdt_add_subnode(blob, parent_offset, buf);
909 if (ret == -FDT_ERR_NOSPACE) {
910 ret = fdt_increase_size(blob, 512);
915 } else if (ret < 0) {
916 printf("Can't add partition node: %s\n",
922 /* Check MTD_WRITEABLE_CMD flag */
923 if (part->mask_flags & 1) {
925 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
926 if (ret == -FDT_ERR_NOSPACE) {
927 ret = fdt_increase_size(blob, 512);
938 ret = fdt_setprop_u64(blob, newoff,
939 "reg", part->offset);
941 ret = fdt_appendprop_u64(blob, newoff,
944 ret = fdt_setprop_u32(blob, newoff,
945 "reg", part->offset);
947 ret = fdt_appendprop_u32(blob, newoff,
951 if (ret == -FDT_ERR_NOSPACE) {
952 ret = fdt_increase_size(blob, 512);
961 ret = fdt_setprop_string(blob, newoff, "label", part->name);
962 if (ret == -FDT_ERR_NOSPACE) {
963 ret = fdt_increase_size(blob, 512);
975 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
978 printf("Can't add property: %s\n", fdt_strerror(ret));
983 * Update partitions in nor/nand nodes using info from
984 * mtdparts environment variable. The nodes to update are
985 * specified by node_info structure which contains mtd device
986 * type and compatible string: E. g. the board code in
987 * ft_board_setup() could use:
989 * struct node_info nodes[] = {
990 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
991 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
994 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
996 void fdt_fixup_mtdparts(void *blob, const struct node_info *node_info,
999 struct mtd_device *dev;
1002 bool inited = false;
1004 for (i = 0; i < node_info_size; i++) {
1007 fdt_for_each_node_by_compatible(noff, blob, -1,
1008 node_info[i].compat) {
1011 prop = fdt_getprop(blob, noff, "status", NULL);
1012 if (prop && !strcmp(prop, "disabled"))
1015 debug("%s: %s, mtd dev type %d\n",
1016 fdt_get_name(blob, noff, 0),
1017 node_info[i].compat, node_info[i].type);
1020 if (mtdparts_init() != 0)
1025 dev = device_find(node_info[i].type, idx++);
1027 parts = fdt_subnode_offset(blob, noff,
1032 if (fdt_node_set_part_info(blob, parts, dev))
1033 return; /* return on error */
1040 void fdt_del_node_and_alias(void *blob, const char *alias)
1042 int off = fdt_path_offset(blob, alias);
1047 fdt_del_node(blob, off);
1049 off = fdt_path_offset(blob, "/aliases");
1050 fdt_delprop(blob, off, alias);
1053 /* Max address size we deal with */
1054 #define OF_MAX_ADDR_CELLS 4
1055 #define OF_BAD_ADDR FDT_ADDR_T_NONE
1056 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
1061 static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
1065 printf(" %08x", *(addr++));
1069 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
1073 * struct of_bus - Callbacks for bus specific translators
1074 * @name: A string used to identify this bus in debug output.
1075 * @addresses: The name of the DT property from which addresses are
1076 * to be read, typically "reg".
1077 * @match: Return non-zero if the node whose parent is at
1078 * parentoffset in the FDT blob corresponds to a bus
1079 * of this type, otherwise return zero. If NULL a match
1081 * @count_cells:Count how many cells (be32 values) a node whose parent
1082 * is at parentoffset in the FDT blob will require to
1083 * represent its address (written to *addrc) & size
1084 * (written to *sizec).
1085 * @map: Map the address addr from the address space of this
1086 * bus to that of its parent, making use of the ranges
1087 * read from DT to an array at range. na and ns are the
1088 * number of cells (be32 values) used to hold and address
1089 * or size, respectively, for this bus. pna is the number
1090 * of cells used to hold an address for the parent bus.
1091 * Returns the address in the address space of the parent
1093 * @translate: Update the value of the address cells at addr within an
1094 * FDT by adding offset to it. na specifies the number of
1095 * cells used to hold the address being translated. Returns
1096 * zero on success, non-zero on error.
1098 * Each bus type will include a struct of_bus in the of_busses array,
1099 * providing implementations of some or all of the functions used to
1100 * match the bus & handle address translation for its children.
1104 const char *addresses;
1105 int (*match)(const void *blob, int parentoffset);
1106 void (*count_cells)(const void *blob, int parentoffset,
1107 int *addrc, int *sizec);
1108 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
1109 int na, int ns, int pna);
1110 int (*translate)(fdt32_t *addr, u64 offset, int na);
1113 /* Default translator (generic bus) */
1114 void fdt_support_default_count_cells(const void *blob, int parentoffset,
1115 int *addrc, int *sizec)
1117 const fdt32_t *prop;
1120 *addrc = fdt_address_cells(blob, parentoffset);
1123 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
1125 *sizec = be32_to_cpup(prop);
1131 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
1132 int na, int ns, int pna)
1136 cp = fdt_read_number(range, na);
1137 s = fdt_read_number(range + na + pna, ns);
1138 da = fdt_read_number(addr, na);
1140 debug("OF: default map, cp=%llx, s=%llx, da=%llx\n", cp, s, da);
1142 if (da < cp || da >= (cp + s))
1147 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
1149 u64 a = fdt_read_number(addr, na);
1150 memset(addr, 0, na * 4);
1153 addr[na - 2] = cpu_to_fdt32(a >> 32);
1154 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
1159 #ifdef CONFIG_OF_ISA_BUS
1161 /* ISA bus translator */
1162 static int of_bus_isa_match(const void *blob, int parentoffset)
1166 name = fdt_get_name(blob, parentoffset, NULL);
1170 return !strcmp(name, "isa");
1173 static void of_bus_isa_count_cells(const void *blob, int parentoffset,
1174 int *addrc, int *sizec)
1182 static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range,
1183 int na, int ns, int pna)
1187 /* Check address type match */
1188 if ((addr[0] ^ range[0]) & cpu_to_be32(1))
1191 cp = fdt_read_number(range + 1, na - 1);
1192 s = fdt_read_number(range + na + pna, ns);
1193 da = fdt_read_number(addr + 1, na - 1);
1195 debug("OF: ISA map, cp=%llx, s=%llx, da=%llx\n", cp, s, da);
1197 if (da < cp || da >= (cp + s))
1202 static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na)
1204 return of_bus_default_translate(addr + 1, offset, na - 1);
1207 #endif /* CONFIG_OF_ISA_BUS */
1209 /* Array of bus specific translators */
1210 static struct of_bus of_busses[] = {
1211 #ifdef CONFIG_OF_ISA_BUS
1216 .match = of_bus_isa_match,
1217 .count_cells = of_bus_isa_count_cells,
1218 .map = of_bus_isa_map,
1219 .translate = of_bus_isa_translate,
1221 #endif /* CONFIG_OF_ISA_BUS */
1226 .count_cells = fdt_support_default_count_cells,
1227 .map = of_bus_default_map,
1228 .translate = of_bus_default_translate,
1232 static struct of_bus *of_match_bus(const void *blob, int parentoffset)
1236 if (ARRAY_SIZE(of_busses) == 1)
1239 for (bus = of_busses; bus; bus++) {
1240 if (!bus->match || bus->match(blob, parentoffset))
1245 * We should always have matched the default bus at least, since
1246 * it has a NULL match field. If we didn't then it somehow isn't
1247 * in the of_busses array or something equally catastrophic has
1254 static int of_translate_one(const void *blob, int parent, struct of_bus *bus,
1255 struct of_bus *pbus, fdt32_t *addr,
1256 int na, int ns, int pna, const char *rprop)
1258 const fdt32_t *ranges;
1261 u64 offset = OF_BAD_ADDR;
1263 /* Normally, an absence of a "ranges" property means we are
1264 * crossing a non-translatable boundary, and thus the addresses
1265 * below the current not cannot be converted to CPU physical ones.
1266 * Unfortunately, while this is very clear in the spec, it's not
1267 * what Apple understood, and they do have things like /uni-n or
1268 * /ht nodes with no "ranges" property and a lot of perfectly
1269 * useable mapped devices below them. Thus we treat the absence of
1270 * "ranges" as equivalent to an empty "ranges" property which means
1271 * a 1:1 translation at that level. It's up to the caller not to try
1272 * to translate addresses that aren't supposed to be translated in
1273 * the first place. --BenH.
1275 ranges = fdt_getprop(blob, parent, rprop, &rlen);
1276 if (ranges == NULL || rlen == 0) {
1277 offset = fdt_read_number(addr, na);
1278 memset(addr, 0, pna * 4);
1279 debug("OF: no ranges, 1:1 translation\n");
1283 debug("OF: walking ranges...\n");
1285 /* Now walk through the ranges */
1287 rone = na + pna + ns;
1288 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1289 offset = bus->map(addr, ranges, na, ns, pna);
1290 if (offset != OF_BAD_ADDR)
1293 if (offset == OF_BAD_ADDR) {
1294 debug("OF: not found !\n");
1297 memcpy(addr, ranges + na, 4 * pna);
1300 of_dump_addr("OF: parent translation for:", addr, pna);
1301 debug("OF: with offset: %llu\n", offset);
1303 /* Translate it into parent bus space */
1304 return pbus->translate(addr, offset, pna);
1308 * Translate an address from the device-tree into a CPU physical address,
1309 * this walks up the tree and applies the various bus mappings on the
1312 * Note: We consider that crossing any level with #size-cells == 0 to mean
1313 * that translation is impossible (that is we are not dealing with a value
1314 * that can be mapped to a cpu physical address). This is not really specified
1315 * that way, but this is traditionally the way IBM at least do things
1317 static u64 __of_translate_address(const void *blob, int node_offset,
1318 const fdt32_t *in_addr, const char *rprop)
1321 struct of_bus *bus, *pbus;
1322 fdt32_t addr[OF_MAX_ADDR_CELLS];
1323 int na, ns, pna, pns;
1324 u64 result = OF_BAD_ADDR;
1326 debug("OF: ** translation for device %s **\n",
1327 fdt_get_name(blob, node_offset, NULL));
1329 /* Get parent & match bus type */
1330 parent = fdt_parent_offset(blob, node_offset);
1333 bus = of_match_bus(blob, parent);
1335 /* Cound address cells & copy address locally */
1336 bus->count_cells(blob, parent, &na, &ns);
1337 if (!OF_CHECK_COUNTS(na, ns)) {
1338 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1339 fdt_get_name(blob, node_offset, NULL));
1342 memcpy(addr, in_addr, na * 4);
1344 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1345 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1346 of_dump_addr("OF: translating address:", addr, na);
1350 /* Switch to parent bus */
1351 node_offset = parent;
1352 parent = fdt_parent_offset(blob, node_offset);
1354 /* If root, we have finished */
1356 debug("OF: reached root node\n");
1357 result = fdt_read_number(addr, na);
1361 /* Get new parent bus and counts */
1362 pbus = of_match_bus(blob, parent);
1363 pbus->count_cells(blob, parent, &pna, &pns);
1364 if (!OF_CHECK_COUNTS(pna, pns)) {
1365 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1366 fdt_get_name(blob, node_offset, NULL));
1370 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1371 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1373 /* Apply bus translation */
1374 if (of_translate_one(blob, node_offset, bus, pbus,
1375 addr, na, ns, pna, rprop))
1378 /* Complete the move up one level */
1383 of_dump_addr("OF: one level translation:", addr, na);
1390 u64 fdt_translate_address(const void *blob, int node_offset,
1391 const fdt32_t *in_addr)
1393 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1396 u64 fdt_translate_dma_address(const void *blob, int node_offset,
1397 const fdt32_t *in_addr)
1399 return __of_translate_address(blob, node_offset, in_addr, "dma-ranges");
1402 int fdt_get_dma_range(const void *blob, int node, phys_addr_t *cpu,
1403 dma_addr_t *bus, u64 *size)
1405 bool found_dma_ranges = false;
1406 struct of_bus *bus_node;
1407 const fdt32_t *ranges;
1408 int na, ns, pna, pns;
1413 /* Find the closest dma-ranges property */
1414 while (parent >= 0) {
1415 ranges = fdt_getprop(blob, parent, "dma-ranges", &len);
1417 /* Ignore empty ranges, they imply no translation required */
1418 if (ranges && len > 0)
1421 /* Once we find 'dma-ranges', then a missing one is an error */
1422 if (found_dma_ranges && !ranges) {
1428 found_dma_ranges = true;
1430 parent = fdt_parent_offset(blob, parent);
1433 if (!ranges || parent < 0) {
1434 debug("no dma-ranges found for node %s\n",
1435 fdt_get_name(blob, node, NULL));
1440 /* switch to that node */
1442 parent = fdt_parent_offset(blob, node);
1444 printf("Found dma-ranges in root node, shouldn't happen\n");
1449 /* Get the address sizes both for the bus and its parent */
1450 bus_node = of_match_bus(blob, node);
1451 bus_node->count_cells(blob, node, &na, &ns);
1452 if (!OF_CHECK_COUNTS(na, ns)) {
1453 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1454 fdt_get_name(blob, node, NULL));
1459 bus_node = of_match_bus(blob, parent);
1460 bus_node->count_cells(blob, parent, &pna, &pns);
1461 if (!OF_CHECK_COUNTS(pna, pns)) {
1462 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1463 fdt_get_name(blob, parent, NULL));
1468 *bus = fdt_read_number(ranges, na);
1469 *cpu = fdt_translate_dma_address(blob, node, ranges + na);
1470 *size = fdt_read_number(ranges + na + pna, ns);
1476 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1477 * who's reg property matches a physical cpu address
1479 * @blob: ptr to device tree
1480 * @compat: compatiable string to match
1481 * @compat_off: property name
1484 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1485 phys_addr_t compat_off)
1489 fdt_for_each_node_by_compatible(off, blob, -1, compat) {
1490 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
1491 if (reg && compat_off == fdt_translate_address(blob, off, reg))
1495 return -FDT_ERR_NOTFOUND;
1498 static int vnode_offset_by_pathf(void *blob, const char *fmt, va_list ap)
1503 len = vsnprintf(path, sizeof(path), fmt, ap);
1504 if (len < 0 || len + 1 > sizeof(path))
1505 return -FDT_ERR_NOSPACE;
1507 return fdt_path_offset(blob, path);
1511 * fdt_node_offset_by_pathf: Find node offset by sprintf formatted path
1513 * @blob: ptr to device tree
1515 * @ap: vsnprintf arguments
1517 int fdt_node_offset_by_pathf(void *blob, const char *fmt, ...)
1523 res = vnode_offset_by_pathf(blob, fmt, ap);
1530 * fdt_set_phandle: Create a phandle property for the given node
1532 * @fdt: ptr to device tree
1533 * @nodeoffset: node to update
1534 * @phandle: phandle value to set (must be unique)
1536 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
1541 int off = fdt_node_offset_by_phandle(fdt, phandle);
1543 if ((off >= 0) && (off != nodeoffset)) {
1546 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1547 printf("Trying to update node %s with phandle %u ",
1550 fdt_get_path(fdt, off, buf, sizeof(buf));
1551 printf("that already exists in node %s.\n", buf);
1552 return -FDT_ERR_BADPHANDLE;
1556 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1562 * fdt_create_phandle: Get or create a phandle property for the given node
1564 * @fdt: ptr to device tree
1565 * @nodeoffset: node to update
1567 unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
1569 /* see if there is a phandle already */
1570 uint32_t phandle = fdt_get_phandle(fdt, nodeoffset);
1572 /* if we got 0, means no phandle so create one */
1576 ret = fdt_generate_phandle(fdt, &phandle);
1578 printf("Can't generate phandle: %s\n",
1583 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1585 printf("Can't set phandle %u: %s\n", phandle,
1595 * fdt_create_phandle_by_compatible: Get or create a phandle for first node with
1598 * @fdt: ptr to device tree
1599 * @compat: node's compatible string
1601 unsigned int fdt_create_phandle_by_compatible(void *fdt, const char *compat)
1603 int offset = fdt_node_offset_by_compatible(fdt, -1, compat);
1606 printf("Can't find node with compatible \"%s\": %s\n", compat,
1607 fdt_strerror(offset));
1611 return fdt_create_phandle(fdt, offset);
1615 * fdt_create_phandle_by_pathf: Get or create a phandle for node given by
1616 * sprintf-formatted path
1618 * @fdt: ptr to device tree
1619 * @fmt, ...: path format string and arguments to pass to sprintf
1621 unsigned int fdt_create_phandle_by_pathf(void *fdt, const char *fmt, ...)
1627 offset = vnode_offset_by_pathf(fdt, fmt, ap);
1631 printf("Can't find node by given path: %s\n",
1632 fdt_strerror(offset));
1636 return fdt_create_phandle(fdt, offset);
1640 * fdt_set_node_status: Set status for the given node
1642 * @fdt: ptr to device tree
1643 * @nodeoffset: node to update
1644 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, FDT_STATUS_FAIL
1646 int fdt_set_node_status(void *fdt, int nodeoffset, enum fdt_status status)
1654 case FDT_STATUS_OKAY:
1655 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1657 case FDT_STATUS_DISABLED:
1658 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1660 case FDT_STATUS_FAIL:
1661 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1664 printf("Invalid fdt status: %x\n", status);
1673 * fdt_set_status_by_alias: Set status for the given node given an alias
1675 * @fdt: ptr to device tree
1676 * @alias: alias of node to update
1677 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, FDT_STATUS_FAIL
1679 int fdt_set_status_by_alias(void *fdt, const char* alias,
1680 enum fdt_status status)
1682 int offset = fdt_path_offset(fdt, alias);
1684 return fdt_set_node_status(fdt, offset, status);
1688 * fdt_set_status_by_compatible: Set node status for first node with given
1691 * @fdt: ptr to device tree
1692 * @compat: node's compatible string
1693 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, FDT_STATUS_FAIL
1695 int fdt_set_status_by_compatible(void *fdt, const char *compat,
1696 enum fdt_status status)
1698 int offset = fdt_node_offset_by_compatible(fdt, -1, compat);
1703 return fdt_set_node_status(fdt, offset, status);
1707 * fdt_set_status_by_pathf: Set node status for node given by sprintf-formatted
1710 * @fdt: ptr to device tree
1711 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, FDT_STATUS_FAIL
1712 * @fmt, ...: path format string and arguments to pass to sprintf
1714 int fdt_set_status_by_pathf(void *fdt, enum fdt_status status, const char *fmt,
1721 offset = vnode_offset_by_pathf(fdt, fmt, ap);
1727 return fdt_set_node_status(fdt, offset, status);
1730 #if defined(CONFIG_LCD)
1731 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1736 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1737 if (noff != -FDT_ERR_NOTFOUND) {
1738 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1740 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1741 if (ret == -FDT_ERR_NOSPACE) {
1742 ret = fdt_increase_size(blob, 512);
1747 } else if (ret < 0) {
1748 printf("Can't add property: %s\n", fdt_strerror(ret));
1754 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1760 * Verify the physical address of device tree node for a given alias
1762 * This function locates the device tree node of a given alias, and then
1763 * verifies that the physical address of that device matches the given
1764 * parameter. It displays a message if there is a mismatch.
1766 * Returns 1 on success, 0 on failure
1768 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1775 path = fdt_getprop(fdt, anode, alias, NULL);
1777 /* If there's no such alias, then it's not a failure */
1781 node = fdt_path_offset(fdt, path);
1783 printf("Warning: device tree alias '%s' points to invalid "
1784 "node %s.\n", alias, path);
1788 reg = fdt_getprop(fdt, node, "reg", &len);
1790 printf("Warning: device tree node '%s' has no address.\n",
1795 dt_addr = fdt_translate_address(fdt, node, reg);
1796 if (addr != dt_addr) {
1797 printf("Warning: U-Boot configured device %s at address %llu,\n"
1798 "but the device tree has it address %llx.\n",
1799 alias, addr, dt_addr);
1807 * Returns the base address of an SOC or PCI node
1809 u64 fdt_get_base_address(const void *fdt, int node)
1812 const fdt32_t *prop;
1814 prop = fdt_getprop(fdt, node, "reg", &size);
1816 return prop ? fdt_translate_address(fdt, node, prop) : OF_BAD_ADDR;
1820 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells,
1821 * or 3 cells specially for a PCI address.
1823 static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1824 uint64_t *val, int cells)
1826 const fdt32_t *prop32;
1827 const unaligned_fdt64_t *prop64;
1829 if ((cell_off + cells) > prop_len)
1830 return -FDT_ERR_NOSPACE;
1832 prop32 = &prop[cell_off];
1835 * Special handling for PCI address in PCI bus <ranges>
1837 * PCI child address is made up of 3 cells. Advance the cell offset
1838 * by 1 so that the PCI child address can be correctly read.
1842 prop64 = (const fdt64_t *)&prop[cell_off];
1846 *val = fdt32_to_cpu(*prop32);
1850 *val = fdt64_to_cpu(*prop64);
1853 return -FDT_ERR_NOSPACE;
1860 * fdt_read_range - Read a node's n'th range property
1862 * @fdt: ptr to device tree
1863 * @node: offset of node
1865 * @child_addr: pointer to storage for the "child address" field
1866 * @addr: pointer to storage for the CPU view translated physical start
1867 * @len: pointer to storage for the range length
1869 * Convenience function that reads and interprets a specific range out of
1870 * a number of the "ranges" property array.
1872 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1873 uint64_t *addr, uint64_t *len)
1875 int pnode = fdt_parent_offset(fdt, node);
1876 const fdt32_t *ranges;
1885 * The "ranges" property is an array of
1886 * { <child address> <parent address> <size in child address space> }
1888 * All 3 elements can span a diffent number of cells. Fetch their size.
1890 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1891 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1892 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1894 /* Now try to get the ranges property */
1895 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1897 return -FDT_ERR_NOTFOUND;
1898 ranges_len /= sizeof(uint32_t);
1900 /* Jump to the n'th entry */
1901 cell = n * (pacells + acells + scells);
1903 /* Read <child address> */
1905 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1912 /* Read <parent address> */
1914 *addr = fdt_translate_address(fdt, node, ranges + cell);
1917 /* Read <size in child address space> */
1919 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1928 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1930 * @fdt: ptr to device tree
1931 * @node: offset of the simplefb node
1932 * @base_address: framebuffer base address
1933 * @width: width in pixels
1934 * @height: height in pixels
1935 * @stride: bytes per line
1936 * @format: pixel format string
1938 * Convenience function to fill and enable a simplefb node.
1940 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1941 u32 height, u32 stride, const char *format)
1945 int i, addrc, sizec, ret;
1947 fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node),
1951 cells[i++] = cpu_to_fdt32(base_address >> 32);
1952 cells[i++] = cpu_to_fdt32(base_address);
1955 cells[i++] = cpu_to_fdt32(height * stride);
1957 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
1961 snprintf(name, sizeof(name), "framebuffer@%llx", base_address);
1962 ret = fdt_set_name(fdt, node, name);
1966 ret = fdt_setprop_u32(fdt, node, "width", width);
1970 ret = fdt_setprop_u32(fdt, node, "height", height);
1974 ret = fdt_setprop_u32(fdt, node, "stride", stride);
1978 ret = fdt_setprop_string(fdt, node, "format", format);
1982 ret = fdt_setprop_string(fdt, node, "status", "okay");
1990 * Update native-mode in display-timings from display environment variable.
1991 * The node to update are specified by path.
1993 int fdt_fixup_display(void *blob, const char *path, const char *display)
1997 if (!display || !path)
1998 return -FDT_ERR_NOTFOUND;
2000 toff = fdt_path_offset(blob, path);
2002 toff = fdt_subnode_offset(blob, toff, "display-timings");
2006 for (off = fdt_first_subnode(blob, toff);
2008 off = fdt_next_subnode(blob, off)) {
2009 uint32_t h = fdt_get_phandle(blob, off);
2010 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
2012 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
2013 return fdt_setprop_u32(blob, toff, "native-mode", h);
2018 #ifdef CONFIG_OF_LIBFDT_OVERLAY
2020 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting
2022 * @fdt: ptr to device tree
2023 * @fdto: ptr to device tree overlay
2025 * Convenience function to apply an overlay and display helpful messages
2026 * in the case of an error
2028 int fdt_overlay_apply_verbose(void *fdt, void *fdto)
2033 err = fdt_path_offset(fdt, "/__symbols__");
2034 has_symbols = err >= 0;
2036 err = fdt_overlay_apply(fdt, fdto);
2038 printf("failed on fdt_overlay_apply(): %s\n",
2041 printf("base fdt does did not have a /__symbols__ node\n");
2042 printf("make sure you've compiled with -@\n");
2050 * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
2052 * @blobp: Pointer to FDT pointer
2053 * Return: 1 if OK, 0 if bad (in which case *blobp is set to NULL)
2055 int fdt_valid(struct fdt_header **blobp)
2057 const void *blob = *blobp;
2061 printf("The address of the fdt is invalid (NULL).\n");
2065 err = fdt_check_header(blob);
2067 return 1; /* valid */
2070 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
2072 * Be more informative on bad version.
2074 if (err == -FDT_ERR_BADVERSION) {
2075 if (fdt_version(blob) <
2076 FDT_FIRST_SUPPORTED_VERSION) {
2077 printf(" - too old, fdt %d < %d",
2079 FDT_FIRST_SUPPORTED_VERSION);
2081 if (fdt_last_comp_version(blob) >
2082 FDT_LAST_SUPPORTED_VERSION) {
2083 printf(" - too new, fdt %d > %d",
2085 FDT_LAST_SUPPORTED_VERSION);