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>
24 * fdt_getprop_u32_default_node - Return a node's property or a default
26 * @fdt: ptr to device tree
27 * @off: offset of node
28 * @cell: cell offset in property
29 * @prop: property name
30 * @dflt: default value if the property isn't found
32 * Convenience function to return a node's property or a default value if
33 * the property doesn't exist.
35 u32
fdt_getprop_u32_default_node(const void *fdt
, int off
, int cell
,
36 const char *prop
, const u32 dflt
)
41 val
= fdt_getprop(fdt
, off
, prop
, &len
);
43 /* Check if property exists */
47 /* Check if property is long enough */
48 if (len
< ((cell
+ 1) * sizeof(uint32_t)))
51 return fdt32_to_cpu(*val
);
55 * fdt_getprop_u32_default - Find a node and return it's property or a default
57 * @fdt: ptr to device tree
59 * @prop: property name
60 * @dflt: default value if the property isn't found
62 * Convenience function to find a node and return it's property or a
63 * default value if it doesn't exist.
65 u32
fdt_getprop_u32_default(const void *fdt
, const char *path
,
66 const char *prop
, const u32 dflt
)
70 off
= fdt_path_offset(fdt
, path
);
74 return fdt_getprop_u32_default_node(fdt
, off
, 0, prop
, dflt
);
78 * fdt_find_and_setprop: Find a node and set it's property
80 * @fdt: ptr to device tree
82 * @prop: property name
83 * @val: ptr to new value
84 * @len: length of new property value
85 * @create: flag to create the property if it doesn't exist
87 * Convenience function to directly set a property given the path to the node.
89 int fdt_find_and_setprop(void *fdt
, const char *node
, const char *prop
,
90 const void *val
, int len
, int create
)
92 int nodeoff
= fdt_path_offset(fdt
, node
);
97 if ((!create
) && (fdt_get_property(fdt
, nodeoff
, prop
, NULL
) == NULL
))
98 return 0; /* create flag not set; so exit quietly */
100 return fdt_setprop(fdt
, nodeoff
, prop
, val
, len
);
104 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
106 * @fdt: pointer to the device tree blob
107 * @parentoffset: structure block offset of a node
108 * @name: name of the subnode to locate
110 * fdt_subnode_offset() finds a subnode of the node with a given name.
111 * If the subnode does not exist, it will be created.
113 int fdt_find_or_add_subnode(void *fdt
, int parentoffset
, const char *name
)
117 offset
= fdt_subnode_offset(fdt
, parentoffset
, name
);
119 if (offset
== -FDT_ERR_NOTFOUND
)
120 offset
= fdt_add_subnode(fdt
, parentoffset
, name
);
123 printf("%s: %s: %s\n", __func__
, name
, fdt_strerror(offset
));
128 /* rename to CONFIG_OF_STDOUT_PATH ? */
129 #if defined(OF_STDOUT_PATH)
130 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
132 return fdt_setprop(fdt
, chosenoff
, "linux,stdout-path",
133 OF_STDOUT_PATH
, strlen(OF_STDOUT_PATH
) + 1);
135 #elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
136 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
140 char sername
[9] = { 0 };
143 char tmp
[256]; /* long enough */
145 sprintf(sername
, "serial%d", CONFIG_CONS_INDEX
- 1);
147 aliasoff
= fdt_path_offset(fdt
, "/aliases");
153 path
= fdt_getprop(fdt
, aliasoff
, sername
, &len
);
159 /* fdt_setprop may break "path" so we copy it to tmp buffer */
160 memcpy(tmp
, path
, len
);
162 err
= fdt_setprop(fdt
, chosenoff
, "linux,stdout-path", tmp
, len
);
164 printf("WARNING: could not set linux,stdout-path %s.\n",
170 printf("WARNING: %s: could not read %s alias: %s\n",
171 __func__
, sername
, fdt_strerror(err
));
176 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
182 static inline int fdt_setprop_uxx(void *fdt
, int nodeoffset
, const char *name
,
183 uint64_t val
, int is_u64
)
186 return fdt_setprop_u64(fdt
, nodeoffset
, name
, val
);
188 return fdt_setprop_u32(fdt
, nodeoffset
, name
, (uint32_t)val
);
191 int fdt_root(void *fdt
)
196 err
= fdt_check_header(fdt
);
198 printf("fdt_root: %s\n", fdt_strerror(err
));
202 serial
= env_get("serial#");
204 err
= fdt_setprop(fdt
, 0, "serial-number", serial
,
208 printf("WARNING: could not set serial-number %s.\n",
217 int fdt_initrd(void *fdt
, ulong initrd_start
, ulong initrd_end
)
224 /* just return if the size of initrd is zero */
225 if (initrd_start
== initrd_end
)
228 /* find or create "/chosen" node. */
229 nodeoffset
= fdt_find_or_add_subnode(fdt
, 0, "chosen");
233 total
= fdt_num_mem_rsv(fdt
);
236 * Look for an existing entry and update it. If we don't find
237 * the entry, we will j be the next available slot.
239 for (j
= 0; j
< total
; j
++) {
240 err
= fdt_get_mem_rsv(fdt
, j
, &addr
, &size
);
241 if (addr
== initrd_start
) {
242 fdt_del_mem_rsv(fdt
, j
);
247 err
= fdt_add_mem_rsv(fdt
, initrd_start
, initrd_end
- initrd_start
);
249 printf("fdt_initrd: %s\n", fdt_strerror(err
));
253 is_u64
= (fdt_address_cells(fdt
, 0) == 2);
255 err
= fdt_setprop_uxx(fdt
, nodeoffset
, "linux,initrd-start",
256 (uint64_t)initrd_start
, is_u64
);
259 printf("WARNING: could not set linux,initrd-start %s.\n",
264 err
= fdt_setprop_uxx(fdt
, nodeoffset
, "linux,initrd-end",
265 (uint64_t)initrd_end
, is_u64
);
268 printf("WARNING: could not set linux,initrd-end %s.\n",
277 int fdt_chosen(void *fdt
)
281 char *str
; /* used to set string properties */
283 err
= fdt_check_header(fdt
);
285 printf("fdt_chosen: %s\n", fdt_strerror(err
));
289 /* find or create "/chosen" node. */
290 nodeoffset
= fdt_find_or_add_subnode(fdt
, 0, "chosen");
294 str
= env_get("bootargs");
296 err
= fdt_setprop(fdt
, nodeoffset
, "bootargs", str
,
299 printf("WARNING: could not set bootargs %s.\n",
305 return fdt_fixup_stdout(fdt
, nodeoffset
);
308 void do_fixup_by_path(void *fdt
, const char *path
, const char *prop
,
309 const void *val
, int len
, int create
)
313 debug("Updating property '%s/%s' = ", path
, prop
);
314 for (i
= 0; i
< len
; i
++)
315 debug(" %.2x", *(u8
*)(val
+i
));
318 int rc
= fdt_find_and_setprop(fdt
, path
, prop
, val
, len
, create
);
320 printf("Unable to update property %s:%s, err=%s\n",
321 path
, prop
, fdt_strerror(rc
));
324 void do_fixup_by_path_u32(void *fdt
, const char *path
, const char *prop
,
327 fdt32_t tmp
= cpu_to_fdt32(val
);
328 do_fixup_by_path(fdt
, path
, prop
, &tmp
, sizeof(tmp
), create
);
331 void do_fixup_by_prop(void *fdt
,
332 const char *pname
, const void *pval
, int plen
,
333 const char *prop
, const void *val
, int len
,
339 debug("Updating property '%s' = ", prop
);
340 for (i
= 0; i
< len
; i
++)
341 debug(" %.2x", *(u8
*)(val
+i
));
344 off
= fdt_node_offset_by_prop_value(fdt
, -1, pname
, pval
, plen
);
345 while (off
!= -FDT_ERR_NOTFOUND
) {
346 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
347 fdt_setprop(fdt
, off
, prop
, val
, len
);
348 off
= fdt_node_offset_by_prop_value(fdt
, off
, pname
, pval
, plen
);
352 void do_fixup_by_prop_u32(void *fdt
,
353 const char *pname
, const void *pval
, int plen
,
354 const char *prop
, u32 val
, int create
)
356 fdt32_t tmp
= cpu_to_fdt32(val
);
357 do_fixup_by_prop(fdt
, pname
, pval
, plen
, prop
, &tmp
, 4, create
);
360 void do_fixup_by_compat(void *fdt
, const char *compat
,
361 const char *prop
, const void *val
, int len
, int create
)
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_compatible(fdt
, -1, compat
);
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_compatible(fdt
, off
, compat
);
379 void do_fixup_by_compat_u32(void *fdt
, const char *compat
,
380 const char *prop
, u32 val
, int create
)
382 fdt32_t tmp
= cpu_to_fdt32(val
);
383 do_fixup_by_compat(fdt
, compat
, prop
, &tmp
, 4, create
);
386 #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
388 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
390 static int fdt_pack_reg(const void *fdt
, void *buf
, u64
*address
, u64
*size
,
394 int address_cells
= fdt_address_cells(fdt
, 0);
395 int size_cells
= fdt_size_cells(fdt
, 0);
398 for (i
= 0; i
< n
; i
++) {
399 if (address_cells
== 2)
400 *(fdt64_t
*)p
= cpu_to_fdt64(address
[i
]);
402 *(fdt32_t
*)p
= cpu_to_fdt32(address
[i
]);
403 p
+= 4 * address_cells
;
406 *(fdt64_t
*)p
= cpu_to_fdt64(size
[i
]);
408 *(fdt32_t
*)p
= cpu_to_fdt32(size
[i
]);
412 return p
- (char *)buf
;
415 #if CONFIG_NR_DRAM_BANKS > 4
416 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
418 #define MEMORY_BANKS_MAX 4
420 int fdt_fixup_memory_banks(void *blob
, u64 start
[], u64 size
[], int banks
)
424 u8 tmp
[MEMORY_BANKS_MAX
* 16]; /* Up to 64-bit address + 64-bit size */
426 if (banks
> MEMORY_BANKS_MAX
) {
427 printf("%s: num banks %d exceeds hardcoded limit %d."
428 " Recompile with higher MEMORY_BANKS_MAX?\n",
429 __FUNCTION__
, banks
, MEMORY_BANKS_MAX
);
433 err
= fdt_check_header(blob
);
435 printf("%s: %s\n", __FUNCTION__
, fdt_strerror(err
));
439 /* find or create "/memory" node. */
440 nodeoffset
= fdt_find_or_add_subnode(blob
, 0, "memory");
444 err
= fdt_setprop(blob
, nodeoffset
, "device_type", "memory",
447 printf("WARNING: could not set %s %s.\n", "device_type",
452 for (i
= 0; i
< banks
; i
++) {
453 if (start
[i
] == 0 && size
[i
] == 0)
462 len
= fdt_pack_reg(blob
, tmp
, start
, size
, banks
);
464 err
= fdt_setprop(blob
, nodeoffset
, "reg", tmp
, len
);
466 printf("WARNING: could not set %s %s.\n",
467 "reg", fdt_strerror(err
));
473 int fdt_set_usable_memory(void *blob
, u64 start
[], u64 size
[], int areas
)
477 u8 tmp
[8 * 16]; /* Up to 64-bit address + 64-bit size */
480 printf("%s: num areas %d exceeds hardcoded limit %d\n",
485 err
= fdt_check_header(blob
);
487 printf("%s: %s\n", __func__
, fdt_strerror(err
));
491 /* find or create "/memory" node. */
492 nodeoffset
= fdt_find_or_add_subnode(blob
, 0, "memory");
496 len
= fdt_pack_reg(blob
, tmp
, start
, size
, areas
);
498 err
= fdt_setprop(blob
, nodeoffset
, "linux,usable-memory", tmp
, len
);
500 printf("WARNING: could not set %s %s.\n",
501 "reg", fdt_strerror(err
));
509 int fdt_fixup_memory(void *blob
, u64 start
, u64 size
)
511 return fdt_fixup_memory_banks(blob
, &start
, &size
, 1);
514 void fdt_fixup_ethernet(void *fdt
)
520 unsigned char mac_addr
[ARP_HLEN
];
522 #ifdef FDT_SEQ_MACADDR_FROM_ENV
524 const struct fdt_property
*fdt_prop
;
527 if (fdt_path_offset(fdt
, "/aliases") < 0)
530 /* Cycle through all aliases */
531 for (prop
= 0; ; prop
++) {
534 /* FDT might have been edited, recompute the offset */
535 offset
= fdt_first_property_offset(fdt
,
536 fdt_path_offset(fdt
, "/aliases"));
537 /* Select property number 'prop' */
538 for (j
= 0; j
< prop
; j
++)
539 offset
= fdt_next_property_offset(fdt
, offset
);
544 path
= fdt_getprop_by_offset(fdt
, offset
, &name
, NULL
);
545 if (!strncmp(name
, "ethernet", 8)) {
546 /* Treat plain "ethernet" same as "ethernet0". */
547 if (!strcmp(name
, "ethernet")
548 #ifdef FDT_SEQ_MACADDR_FROM_ENV
549 || !strcmp(name
, "ethernet0")
553 #ifndef FDT_SEQ_MACADDR_FROM_ENV
555 i
= trailing_strtol(name
);
559 strcpy(mac
, "ethaddr");
561 sprintf(mac
, "eth%daddr", i
);
565 #ifdef FDT_SEQ_MACADDR_FROM_ENV
566 nodeoff
= fdt_path_offset(fdt
, path
);
567 fdt_prop
= fdt_get_property(fdt
, nodeoff
, "status",
569 if (fdt_prop
&& !strcmp(fdt_prop
->data
, "disabled"))
577 for (j
= 0; j
< 6; j
++) {
579 simple_strtoul(tmp
, &end
, 16) : 0;
581 tmp
= (*end
) ? end
+ 1 : end
;
584 do_fixup_by_path(fdt
, path
, "mac-address",
586 do_fixup_by_path(fdt
, path
, "local-mac-address",
592 int fdt_record_loadable(void *blob
, u32 index
, const char *name
,
593 uintptr_t load_addr
, u32 size
, uintptr_t entry_point
,
594 const char *type
, const char *os
)
598 err
= fdt_check_header(blob
);
600 printf("%s: %s\n", __func__
, fdt_strerror(err
));
604 /* find or create "/fit-images" node */
605 node
= fdt_find_or_add_subnode(blob
, 0, "fit-images");
609 /* find or create "/fit-images/<name>" node */
610 node
= fdt_find_or_add_subnode(blob
, node
, name
);
615 * We record these as 32bit entities, possibly truncating addresses.
616 * However, spl_fit.c is not 64bit safe either: i.e. we should not
617 * have an issue here.
619 fdt_setprop_u32(blob
, node
, "load-addr", load_addr
);
620 if (entry_point
!= -1)
621 fdt_setprop_u32(blob
, node
, "entry-point", entry_point
);
622 fdt_setprop_u32(blob
, node
, "size", size
);
624 fdt_setprop_string(blob
, node
, "type", type
);
626 fdt_setprop_string(blob
, node
, "os", os
);
631 /* Resize the fdt to its actual size + a bit of padding */
632 int fdt_shrink_to_minimum(void *blob
, uint extrasize
)
643 total
= fdt_num_mem_rsv(blob
);
644 for (i
= 0; i
< total
; i
++) {
645 fdt_get_mem_rsv(blob
, i
, &addr
, &size
);
646 if (addr
== (uintptr_t)blob
) {
647 fdt_del_mem_rsv(blob
, i
);
654 * Calculate the actual size of the fdt
655 * plus the size needed for 5 fdt_add_mem_rsv, one
656 * for the fdt itself and 4 for a possible initrd
657 * ((initrd-start + initrd-end) * 2 (name & value))
659 actualsize
= fdt_off_dt_strings(blob
) +
660 fdt_size_dt_strings(blob
) + 5 * sizeof(struct fdt_reserve_entry
);
662 actualsize
+= extrasize
;
663 /* Make it so the fdt ends on a page boundary */
664 actualsize
= ALIGN(actualsize
+ ((uintptr_t)blob
& 0xfff), 0x1000);
665 actualsize
= actualsize
- ((uintptr_t)blob
& 0xfff);
667 /* Change the fdt header to reflect the correct size */
668 fdt_set_totalsize(blob
, actualsize
);
671 /* Add the new reservation */
672 ret
= fdt_add_mem_rsv(blob
, map_to_sysmem(blob
), actualsize
);
681 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
683 #define FDT_PCI_PREFETCH (0x40000000)
684 #define FDT_PCI_MEM32 (0x02000000)
685 #define FDT_PCI_IO (0x01000000)
686 #define FDT_PCI_MEM64 (0x03000000)
688 int fdt_pci_dma_ranges(void *blob
, int phb_off
, struct pci_controller
*hose
) {
690 int addrcell
, sizecell
, len
, r
;
692 /* sized based on pci addr cells, size-cells, & address-cells */
693 u32 dma_ranges
[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN
];
695 addrcell
= fdt_getprop_u32_default(blob
, "/", "#address-cells", 1);
696 sizecell
= fdt_getprop_u32_default(blob
, "/", "#size-cells", 1);
698 dma_range
= &dma_ranges
[0];
699 for (r
= 0; r
< hose
->region_count
; r
++) {
700 u64 bus_start
, phys_start
, size
;
702 /* skip if !PCI_REGION_SYS_MEMORY */
703 if (!(hose
->regions
[r
].flags
& PCI_REGION_SYS_MEMORY
))
706 bus_start
= (u64
)hose
->regions
[r
].bus_start
;
707 phys_start
= (u64
)hose
->regions
[r
].phys_start
;
708 size
= (u64
)hose
->regions
[r
].size
;
711 if (size
>= 0x100000000ull
)
712 dma_range
[0] |= cpu_to_fdt32(FDT_PCI_MEM64
);
714 dma_range
[0] |= cpu_to_fdt32(FDT_PCI_MEM32
);
715 if (hose
->regions
[r
].flags
& PCI_REGION_PREFETCH
)
716 dma_range
[0] |= cpu_to_fdt32(FDT_PCI_PREFETCH
);
717 #ifdef CONFIG_SYS_PCI_64BIT
718 dma_range
[1] = cpu_to_fdt32(bus_start
>> 32);
722 dma_range
[2] = cpu_to_fdt32(bus_start
& 0xffffffff);
725 dma_range
[3] = cpu_to_fdt32(phys_start
>> 32);
726 dma_range
[4] = cpu_to_fdt32(phys_start
& 0xffffffff);
728 dma_range
[3] = cpu_to_fdt32(phys_start
& 0xffffffff);
732 dma_range
[3 + addrcell
+ 0] =
733 cpu_to_fdt32(size
>> 32);
734 dma_range
[3 + addrcell
+ 1] =
735 cpu_to_fdt32(size
& 0xffffffff);
737 dma_range
[3 + addrcell
+ 0] =
738 cpu_to_fdt32(size
& 0xffffffff);
741 dma_range
+= (3 + addrcell
+ sizecell
);
744 len
= dma_range
- &dma_ranges
[0];
746 fdt_setprop(blob
, phb_off
, "dma-ranges", &dma_ranges
[0], len
*4);
752 int fdt_increase_size(void *fdt
, int add_len
)
756 newlen
= fdt_totalsize(fdt
) + add_len
;
758 /* Open in place with a new len */
759 return fdt_open_into(fdt
, fdt
, newlen
);
762 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
763 #include <jffs2/load_kernel.h>
764 #include <mtd_node.h>
766 static int fdt_del_subnodes(const void *blob
, int parent_offset
)
771 for (ndepth
= 0, off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
772 (off
>= 0) && (ndepth
> 0);
773 off
= fdt_next_node(blob
, off
, &ndepth
)) {
775 debug("delete %s: offset: %x\n",
776 fdt_get_name(blob
, off
, 0), off
);
777 ret
= fdt_del_node((void *)blob
, off
);
779 printf("Can't delete node: %s\n",
791 static int fdt_del_partitions(void *blob
, int parent_offset
)
798 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
799 if (off
> 0 && ndepth
== 1) {
800 prop
= fdt_getprop(blob
, off
, "label", NULL
);
803 * Could not find label property, nand {}; node?
804 * Check subnode, delete partitions there if any.
806 return fdt_del_partitions(blob
, off
);
808 ret
= fdt_del_subnodes(blob
, parent_offset
);
810 printf("Can't remove subnodes: %s\n",
819 int fdt_node_set_part_info(void *blob
, int parent_offset
,
820 struct mtd_device
*dev
)
822 struct list_head
*pentry
;
823 struct part_info
*part
;
829 ret
= fdt_del_partitions(blob
, parent_offset
);
834 * Check if size/address is 1 or 2 cells.
835 * We assume #address-cells and #size-cells have same value.
837 sizecell
= fdt_getprop_u32_default_node(blob
, parent_offset
,
838 0, "#size-cells", 1);
841 * Check if it is nand {}; subnode, adjust
842 * the offset in this case
844 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
845 if (off
> 0 && ndepth
== 1)
849 list_for_each_prev(pentry
, &dev
->parts
) {
852 part
= list_entry(pentry
, struct part_info
, link
);
854 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
855 part_num
, part
->name
, part
->size
,
856 part
->offset
, part
->mask_flags
);
858 sprintf(buf
, "partition@%llx", part
->offset
);
860 ret
= fdt_add_subnode(blob
, parent_offset
, buf
);
861 if (ret
== -FDT_ERR_NOSPACE
) {
862 ret
= fdt_increase_size(blob
, 512);
867 } else if (ret
< 0) {
868 printf("Can't add partition node: %s\n",
874 /* Check MTD_WRITEABLE_CMD flag */
875 if (part
->mask_flags
& 1) {
877 ret
= fdt_setprop(blob
, newoff
, "read_only", NULL
, 0);
878 if (ret
== -FDT_ERR_NOSPACE
) {
879 ret
= fdt_increase_size(blob
, 512);
890 ret
= fdt_setprop_u64(blob
, newoff
,
891 "reg", part
->offset
);
893 ret
= fdt_appendprop_u64(blob
, newoff
,
896 ret
= fdt_setprop_u32(blob
, newoff
,
897 "reg", part
->offset
);
899 ret
= fdt_appendprop_u32(blob
, newoff
,
903 if (ret
== -FDT_ERR_NOSPACE
) {
904 ret
= fdt_increase_size(blob
, 512);
913 ret
= fdt_setprop_string(blob
, newoff
, "label", part
->name
);
914 if (ret
== -FDT_ERR_NOSPACE
) {
915 ret
= fdt_increase_size(blob
, 512);
927 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
930 printf("Can't add property: %s\n", fdt_strerror(ret
));
935 * Update partitions in nor/nand nodes using info from
936 * mtdparts environment variable. The nodes to update are
937 * specified by node_info structure which contains mtd device
938 * type and compatible string: E. g. the board code in
939 * ft_board_setup() could use:
941 * struct node_info nodes[] = {
942 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
943 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
946 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
948 void fdt_fixup_mtdparts(void *blob
, const struct node_info
*node_info
,
951 struct mtd_device
*dev
;
955 if (mtdparts_init() != 0)
958 for (i
= 0; i
< node_info_size
; i
++) {
960 noff
= fdt_node_offset_by_compatible(blob
, -1,
961 node_info
[i
].compat
);
962 while (noff
!= -FDT_ERR_NOTFOUND
) {
963 debug("%s: %s, mtd dev type %d\n",
964 fdt_get_name(blob
, noff
, 0),
965 node_info
[i
].compat
, node_info
[i
].type
);
966 dev
= device_find(node_info
[i
].type
, idx
++);
968 if (fdt_node_set_part_info(blob
, noff
, dev
))
969 return; /* return on error */
972 /* Jump to next flash node */
973 noff
= fdt_node_offset_by_compatible(blob
, noff
,
974 node_info
[i
].compat
);
980 void fdt_del_node_and_alias(void *blob
, const char *alias
)
982 int off
= fdt_path_offset(blob
, alias
);
987 fdt_del_node(blob
, off
);
989 off
= fdt_path_offset(blob
, "/aliases");
990 fdt_delprop(blob
, off
, alias
);
993 /* Max address size we deal with */
994 #define OF_MAX_ADDR_CELLS 4
995 #define OF_BAD_ADDR FDT_ADDR_T_NONE
996 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
1001 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
)
1005 printf(" %08x", *(addr
++));
1009 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
) { }
1013 * struct of_bus - Callbacks for bus specific translators
1014 * @name: A string used to identify this bus in debug output.
1015 * @addresses: The name of the DT property from which addresses are
1016 * to be read, typically "reg".
1017 * @match: Return non-zero if the node whose parent is at
1018 * parentoffset in the FDT blob corresponds to a bus
1019 * of this type, otherwise return zero. If NULL a match
1021 * @count_cells:Count how many cells (be32 values) a node whose parent
1022 * is at parentoffset in the FDT blob will require to
1023 * represent its address (written to *addrc) & size
1024 * (written to *sizec).
1025 * @map: Map the address addr from the address space of this
1026 * bus to that of its parent, making use of the ranges
1027 * read from DT to an array at range. na and ns are the
1028 * number of cells (be32 values) used to hold and address
1029 * or size, respectively, for this bus. pna is the number
1030 * of cells used to hold an address for the parent bus.
1031 * Returns the address in the address space of the parent
1033 * @translate: Update the value of the address cells at addr within an
1034 * FDT by adding offset to it. na specifies the number of
1035 * cells used to hold the address being translated. Returns
1036 * zero on success, non-zero on error.
1038 * Each bus type will include a struct of_bus in the of_busses array,
1039 * providing implementations of some or all of the functions used to
1040 * match the bus & handle address translation for its children.
1044 const char *addresses
;
1045 int (*match
)(const void *blob
, int parentoffset
);
1046 void (*count_cells
)(const void *blob
, int parentoffset
,
1047 int *addrc
, int *sizec
);
1048 u64 (*map
)(fdt32_t
*addr
, const fdt32_t
*range
,
1049 int na
, int ns
, int pna
);
1050 int (*translate
)(fdt32_t
*addr
, u64 offset
, int na
);
1053 /* Default translator (generic bus) */
1054 void fdt_support_default_count_cells(const void *blob
, int parentoffset
,
1055 int *addrc
, int *sizec
)
1057 const fdt32_t
*prop
;
1060 *addrc
= fdt_address_cells(blob
, parentoffset
);
1063 prop
= fdt_getprop(blob
, parentoffset
, "#size-cells", NULL
);
1065 *sizec
= be32_to_cpup(prop
);
1071 static u64
of_bus_default_map(fdt32_t
*addr
, const fdt32_t
*range
,
1072 int na
, int ns
, int pna
)
1076 cp
= fdt_read_number(range
, na
);
1077 s
= fdt_read_number(range
+ na
+ pna
, ns
);
1078 da
= fdt_read_number(addr
, na
);
1080 debug("OF: default map, cp=%llx, s=%llx, da=%llx\n", cp
, s
, da
);
1082 if (da
< cp
|| da
>= (cp
+ s
))
1087 static int of_bus_default_translate(fdt32_t
*addr
, u64 offset
, int na
)
1089 u64 a
= fdt_read_number(addr
, na
);
1090 memset(addr
, 0, na
* 4);
1093 addr
[na
- 2] = cpu_to_fdt32(a
>> 32);
1094 addr
[na
- 1] = cpu_to_fdt32(a
& 0xffffffffu
);
1099 #ifdef CONFIG_OF_ISA_BUS
1101 /* ISA bus translator */
1102 static int of_bus_isa_match(const void *blob
, int parentoffset
)
1106 name
= fdt_get_name(blob
, parentoffset
, NULL
);
1110 return !strcmp(name
, "isa");
1113 static void of_bus_isa_count_cells(const void *blob
, int parentoffset
,
1114 int *addrc
, int *sizec
)
1122 static u64
of_bus_isa_map(fdt32_t
*addr
, const fdt32_t
*range
,
1123 int na
, int ns
, int pna
)
1127 /* Check address type match */
1128 if ((addr
[0] ^ range
[0]) & cpu_to_be32(1))
1131 cp
= fdt_read_number(range
+ 1, na
- 1);
1132 s
= fdt_read_number(range
+ na
+ pna
, ns
);
1133 da
= fdt_read_number(addr
+ 1, na
- 1);
1135 debug("OF: ISA map, cp=%llx, s=%llx, da=%llx\n", cp
, s
, da
);
1137 if (da
< cp
|| da
>= (cp
+ s
))
1142 static int of_bus_isa_translate(fdt32_t
*addr
, u64 offset
, int na
)
1144 return of_bus_default_translate(addr
+ 1, offset
, na
- 1);
1147 #endif /* CONFIG_OF_ISA_BUS */
1149 /* Array of bus specific translators */
1150 static struct of_bus of_busses
[] = {
1151 #ifdef CONFIG_OF_ISA_BUS
1156 .match
= of_bus_isa_match
,
1157 .count_cells
= of_bus_isa_count_cells
,
1158 .map
= of_bus_isa_map
,
1159 .translate
= of_bus_isa_translate
,
1161 #endif /* CONFIG_OF_ISA_BUS */
1166 .count_cells
= fdt_support_default_count_cells
,
1167 .map
= of_bus_default_map
,
1168 .translate
= of_bus_default_translate
,
1172 static struct of_bus
*of_match_bus(const void *blob
, int parentoffset
)
1176 if (ARRAY_SIZE(of_busses
) == 1)
1179 for (bus
= of_busses
; bus
; bus
++) {
1180 if (!bus
->match
|| bus
->match(blob
, parentoffset
))
1185 * We should always have matched the default bus at least, since
1186 * it has a NULL match field. If we didn't then it somehow isn't
1187 * in the of_busses array or something equally catastrophic has
1194 static int of_translate_one(const void *blob
, int parent
, struct of_bus
*bus
,
1195 struct of_bus
*pbus
, fdt32_t
*addr
,
1196 int na
, int ns
, int pna
, const char *rprop
)
1198 const fdt32_t
*ranges
;
1201 u64 offset
= OF_BAD_ADDR
;
1203 /* Normally, an absence of a "ranges" property means we are
1204 * crossing a non-translatable boundary, and thus the addresses
1205 * below the current not cannot be converted to CPU physical ones.
1206 * Unfortunately, while this is very clear in the spec, it's not
1207 * what Apple understood, and they do have things like /uni-n or
1208 * /ht nodes with no "ranges" property and a lot of perfectly
1209 * useable mapped devices below them. Thus we treat the absence of
1210 * "ranges" as equivalent to an empty "ranges" property which means
1211 * a 1:1 translation at that level. It's up to the caller not to try
1212 * to translate addresses that aren't supposed to be translated in
1213 * the first place. --BenH.
1215 ranges
= fdt_getprop(blob
, parent
, rprop
, &rlen
);
1216 if (ranges
== NULL
|| rlen
== 0) {
1217 offset
= fdt_read_number(addr
, na
);
1218 memset(addr
, 0, pna
* 4);
1219 debug("OF: no ranges, 1:1 translation\n");
1223 debug("OF: walking ranges...\n");
1225 /* Now walk through the ranges */
1227 rone
= na
+ pna
+ ns
;
1228 for (; rlen
>= rone
; rlen
-= rone
, ranges
+= rone
) {
1229 offset
= bus
->map(addr
, ranges
, na
, ns
, pna
);
1230 if (offset
!= OF_BAD_ADDR
)
1233 if (offset
== OF_BAD_ADDR
) {
1234 debug("OF: not found !\n");
1237 memcpy(addr
, ranges
+ na
, 4 * pna
);
1240 of_dump_addr("OF: parent translation for:", addr
, pna
);
1241 debug("OF: with offset: %llu\n", offset
);
1243 /* Translate it into parent bus space */
1244 return pbus
->translate(addr
, offset
, pna
);
1248 * Translate an address from the device-tree into a CPU physical address,
1249 * this walks up the tree and applies the various bus mappings on the
1252 * Note: We consider that crossing any level with #size-cells == 0 to mean
1253 * that translation is impossible (that is we are not dealing with a value
1254 * that can be mapped to a cpu physical address). This is not really specified
1255 * that way, but this is traditionally the way IBM at least do things
1257 static u64
__of_translate_address(const void *blob
, int node_offset
,
1258 const fdt32_t
*in_addr
, const char *rprop
)
1261 struct of_bus
*bus
, *pbus
;
1262 fdt32_t addr
[OF_MAX_ADDR_CELLS
];
1263 int na
, ns
, pna
, pns
;
1264 u64 result
= OF_BAD_ADDR
;
1266 debug("OF: ** translation for device %s **\n",
1267 fdt_get_name(blob
, node_offset
, NULL
));
1269 /* Get parent & match bus type */
1270 parent
= fdt_parent_offset(blob
, node_offset
);
1273 bus
= of_match_bus(blob
, parent
);
1275 /* Cound address cells & copy address locally */
1276 bus
->count_cells(blob
, parent
, &na
, &ns
);
1277 if (!OF_CHECK_COUNTS(na
, ns
)) {
1278 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1279 fdt_get_name(blob
, node_offset
, NULL
));
1282 memcpy(addr
, in_addr
, na
* 4);
1284 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1285 bus
->name
, na
, ns
, fdt_get_name(blob
, parent
, NULL
));
1286 of_dump_addr("OF: translating address:", addr
, na
);
1290 /* Switch to parent bus */
1291 node_offset
= parent
;
1292 parent
= fdt_parent_offset(blob
, node_offset
);
1294 /* If root, we have finished */
1296 debug("OF: reached root node\n");
1297 result
= fdt_read_number(addr
, na
);
1301 /* Get new parent bus and counts */
1302 pbus
= of_match_bus(blob
, parent
);
1303 pbus
->count_cells(blob
, parent
, &pna
, &pns
);
1304 if (!OF_CHECK_COUNTS(pna
, pns
)) {
1305 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1306 fdt_get_name(blob
, node_offset
, NULL
));
1310 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1311 pbus
->name
, pna
, pns
, fdt_get_name(blob
, parent
, NULL
));
1313 /* Apply bus translation */
1314 if (of_translate_one(blob
, node_offset
, bus
, pbus
,
1315 addr
, na
, ns
, pna
, rprop
))
1318 /* Complete the move up one level */
1323 of_dump_addr("OF: one level translation:", addr
, na
);
1330 u64
fdt_translate_address(const void *blob
, int node_offset
,
1331 const fdt32_t
*in_addr
)
1333 return __of_translate_address(blob
, node_offset
, in_addr
, "ranges");
1336 u64
fdt_translate_dma_address(const void *blob
, int node_offset
,
1337 const fdt32_t
*in_addr
)
1339 return __of_translate_address(blob
, node_offset
, in_addr
, "dma-ranges");
1343 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1344 * who's reg property matches a physical cpu address
1346 * @blob: ptr to device tree
1347 * @compat: compatiable string to match
1348 * @compat_off: property name
1351 int fdt_node_offset_by_compat_reg(void *blob
, const char *compat
,
1352 phys_addr_t compat_off
)
1354 int len
, off
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1355 while (off
!= -FDT_ERR_NOTFOUND
) {
1356 const fdt32_t
*reg
= fdt_getprop(blob
, off
, "reg", &len
);
1358 if (compat_off
== fdt_translate_address(blob
, off
, reg
))
1361 off
= fdt_node_offset_by_compatible(blob
, off
, compat
);
1364 return -FDT_ERR_NOTFOUND
;
1368 * fdt_alloc_phandle: Return next free phandle value
1370 * @blob: ptr to device tree
1372 int fdt_alloc_phandle(void *blob
)
1375 uint32_t phandle
= 0;
1377 for (offset
= fdt_next_node(blob
, -1, NULL
); offset
>= 0;
1378 offset
= fdt_next_node(blob
, offset
, NULL
)) {
1379 phandle
= max(phandle
, fdt_get_phandle(blob
, offset
));
1386 * fdt_set_phandle: Create a phandle property for the given node
1388 * @fdt: ptr to device tree
1389 * @nodeoffset: node to update
1390 * @phandle: phandle value to set (must be unique)
1392 int fdt_set_phandle(void *fdt
, int nodeoffset
, uint32_t phandle
)
1397 int off
= fdt_node_offset_by_phandle(fdt
, phandle
);
1399 if ((off
>= 0) && (off
!= nodeoffset
)) {
1402 fdt_get_path(fdt
, nodeoffset
, buf
, sizeof(buf
));
1403 printf("Trying to update node %s with phandle %u ",
1406 fdt_get_path(fdt
, off
, buf
, sizeof(buf
));
1407 printf("that already exists in node %s.\n", buf
);
1408 return -FDT_ERR_BADPHANDLE
;
1412 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "phandle", phandle
);
1417 * For now, also set the deprecated "linux,phandle" property, so that we
1418 * don't break older kernels.
1420 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "linux,phandle", phandle
);
1426 * fdt_create_phandle: Create a phandle property for the given node
1428 * @fdt: ptr to device tree
1429 * @nodeoffset: node to update
1431 unsigned int fdt_create_phandle(void *fdt
, int nodeoffset
)
1433 /* see if there is a phandle already */
1434 int phandle
= fdt_get_phandle(fdt
, nodeoffset
);
1436 /* if we got 0, means no phandle so create one */
1440 phandle
= fdt_alloc_phandle(fdt
);
1441 ret
= fdt_set_phandle(fdt
, nodeoffset
, phandle
);
1443 printf("Can't set phandle %u: %s\n", phandle
,
1453 * fdt_set_node_status: Set status for the given node
1455 * @fdt: ptr to device tree
1456 * @nodeoffset: node to update
1457 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1458 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1459 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1461 int fdt_set_node_status(void *fdt
, int nodeoffset
,
1462 enum fdt_status status
, unsigned int error_code
)
1471 case FDT_STATUS_OKAY
:
1472 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "okay");
1474 case FDT_STATUS_DISABLED
:
1475 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "disabled");
1477 case FDT_STATUS_FAIL
:
1478 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "fail");
1480 case FDT_STATUS_FAIL_ERROR_CODE
:
1481 sprintf(buf
, "fail-%d", error_code
);
1482 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", buf
);
1485 printf("Invalid fdt status: %x\n", status
);
1494 * fdt_set_status_by_alias: Set status for the given node given an alias
1496 * @fdt: ptr to device tree
1497 * @alias: alias of node to update
1498 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1499 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1500 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1502 int fdt_set_status_by_alias(void *fdt
, const char* alias
,
1503 enum fdt_status status
, unsigned int error_code
)
1505 int offset
= fdt_path_offset(fdt
, alias
);
1507 return fdt_set_node_status(fdt
, offset
, status
, error_code
);
1510 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1511 int fdt_add_edid(void *blob
, const char *compat
, unsigned char *edid_buf
)
1516 noff
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1517 if (noff
!= -FDT_ERR_NOTFOUND
) {
1518 debug("%s: %s\n", fdt_get_name(blob
, noff
, 0), compat
);
1520 ret
= fdt_setprop(blob
, noff
, "edid", edid_buf
, 128);
1521 if (ret
== -FDT_ERR_NOSPACE
) {
1522 ret
= fdt_increase_size(blob
, 512);
1527 } else if (ret
< 0) {
1528 printf("Can't add property: %s\n", fdt_strerror(ret
));
1534 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
1540 * Verify the physical address of device tree node for a given alias
1542 * This function locates the device tree node of a given alias, and then
1543 * verifies that the physical address of that device matches the given
1544 * parameter. It displays a message if there is a mismatch.
1546 * Returns 1 on success, 0 on failure
1548 int fdt_verify_alias_address(void *fdt
, int anode
, const char *alias
, u64 addr
)
1555 path
= fdt_getprop(fdt
, anode
, alias
, NULL
);
1557 /* If there's no such alias, then it's not a failure */
1561 node
= fdt_path_offset(fdt
, path
);
1563 printf("Warning: device tree alias '%s' points to invalid "
1564 "node %s.\n", alias
, path
);
1568 reg
= fdt_getprop(fdt
, node
, "reg", &len
);
1570 printf("Warning: device tree node '%s' has no address.\n",
1575 dt_addr
= fdt_translate_address(fdt
, node
, reg
);
1576 if (addr
!= dt_addr
) {
1577 printf("Warning: U-Boot configured device %s at address %llu,\n"
1578 "but the device tree has it address %llx.\n",
1579 alias
, addr
, dt_addr
);
1587 * Returns the base address of an SOC or PCI node
1589 u64
fdt_get_base_address(const void *fdt
, int node
)
1592 const fdt32_t
*prop
;
1594 prop
= fdt_getprop(fdt
, node
, "reg", &size
);
1596 return prop
? fdt_translate_address(fdt
, node
, prop
) : OF_BAD_ADDR
;
1600 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1602 static int fdt_read_prop(const fdt32_t
*prop
, int prop_len
, int cell_off
,
1603 uint64_t *val
, int cells
)
1605 const fdt32_t
*prop32
= &prop
[cell_off
];
1606 const unaligned_fdt64_t
*prop64
= (const fdt64_t
*)&prop
[cell_off
];
1608 if ((cell_off
+ cells
) > prop_len
)
1609 return -FDT_ERR_NOSPACE
;
1613 *val
= fdt32_to_cpu(*prop32
);
1616 *val
= fdt64_to_cpu(*prop64
);
1619 return -FDT_ERR_NOSPACE
;
1626 * fdt_read_range - Read a node's n'th range property
1628 * @fdt: ptr to device tree
1629 * @node: offset of node
1631 * @child_addr: pointer to storage for the "child address" field
1632 * @addr: pointer to storage for the CPU view translated physical start
1633 * @len: pointer to storage for the range length
1635 * Convenience function that reads and interprets a specific range out of
1636 * a number of the "ranges" property array.
1638 int fdt_read_range(void *fdt
, int node
, int n
, uint64_t *child_addr
,
1639 uint64_t *addr
, uint64_t *len
)
1641 int pnode
= fdt_parent_offset(fdt
, node
);
1642 const fdt32_t
*ranges
;
1651 * The "ranges" property is an array of
1652 * { <child address> <parent address> <size in child address space> }
1654 * All 3 elements can span a diffent number of cells. Fetch their size.
1656 pacells
= fdt_getprop_u32_default_node(fdt
, pnode
, 0, "#address-cells", 1);
1657 acells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#address-cells", 1);
1658 scells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#size-cells", 1);
1660 /* Now try to get the ranges property */
1661 ranges
= fdt_getprop(fdt
, node
, "ranges", &ranges_len
);
1663 return -FDT_ERR_NOTFOUND
;
1664 ranges_len
/= sizeof(uint32_t);
1666 /* Jump to the n'th entry */
1667 cell
= n
* (pacells
+ acells
+ scells
);
1669 /* Read <child address> */
1671 r
= fdt_read_prop(ranges
, ranges_len
, cell
, child_addr
,
1678 /* Read <parent address> */
1680 *addr
= fdt_translate_address(fdt
, node
, ranges
+ cell
);
1683 /* Read <size in child address space> */
1685 r
= fdt_read_prop(ranges
, ranges_len
, cell
, len
, scells
);
1694 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1696 * @fdt: ptr to device tree
1697 * @node: offset of the simplefb node
1698 * @base_address: framebuffer base address
1699 * @width: width in pixels
1700 * @height: height in pixels
1701 * @stride: bytes per line
1702 * @format: pixel format string
1704 * Convenience function to fill and enable a simplefb node.
1706 int fdt_setup_simplefb_node(void *fdt
, int node
, u64 base_address
, u32 width
,
1707 u32 height
, u32 stride
, const char *format
)
1711 int i
, addrc
, sizec
, ret
;
1713 fdt_support_default_count_cells(fdt
, fdt_parent_offset(fdt
, node
),
1717 cells
[i
++] = cpu_to_fdt32(base_address
>> 32);
1718 cells
[i
++] = cpu_to_fdt32(base_address
);
1721 cells
[i
++] = cpu_to_fdt32(height
* stride
);
1723 ret
= fdt_setprop(fdt
, node
, "reg", cells
, sizeof(cells
[0]) * i
);
1727 snprintf(name
, sizeof(name
), "framebuffer@%llx", base_address
);
1728 ret
= fdt_set_name(fdt
, node
, name
);
1732 ret
= fdt_setprop_u32(fdt
, node
, "width", width
);
1736 ret
= fdt_setprop_u32(fdt
, node
, "height", height
);
1740 ret
= fdt_setprop_u32(fdt
, node
, "stride", stride
);
1744 ret
= fdt_setprop_string(fdt
, node
, "format", format
);
1748 ret
= fdt_setprop_string(fdt
, node
, "status", "okay");
1756 * Update native-mode in display-timings from display environment variable.
1757 * The node to update are specified by path.
1759 int fdt_fixup_display(void *blob
, const char *path
, const char *display
)
1763 if (!display
|| !path
)
1764 return -FDT_ERR_NOTFOUND
;
1766 toff
= fdt_path_offset(blob
, path
);
1768 toff
= fdt_subnode_offset(blob
, toff
, "display-timings");
1772 for (off
= fdt_first_subnode(blob
, toff
);
1774 off
= fdt_next_subnode(blob
, off
)) {
1775 uint32_t h
= fdt_get_phandle(blob
, off
);
1776 debug("%s:0x%x\n", fdt_get_name(blob
, off
, NULL
),
1778 if (strcasecmp(fdt_get_name(blob
, off
, NULL
), display
) == 0)
1779 return fdt_setprop_u32(blob
, toff
, "native-mode", h
);
1784 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1786 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting
1788 * @fdt: ptr to device tree
1789 * @fdto: ptr to device tree overlay
1791 * Convenience function to apply an overlay and display helpful messages
1792 * in the case of an error
1794 int fdt_overlay_apply_verbose(void *fdt
, void *fdto
)
1799 err
= fdt_path_offset(fdt
, "/__symbols__");
1800 has_symbols
= err
>= 0;
1802 err
= fdt_overlay_apply(fdt
, fdto
);
1804 printf("failed on fdt_overlay_apply(): %s\n",
1807 printf("base fdt does did not have a /__symbols__ node\n");
1808 printf("make sure you've compiled with -@\n");