1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2017 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
7 #define LOG_CATEGORY LOGC_DT
12 #include <fdt_support.h>
16 #include <linux/libfdt.h>
17 #include <dm/of_access.h>
18 #include <dm/of_addr.h>
19 #include <dm/ofnode.h>
20 #include <linux/err.h>
21 #include <linux/ioport.h>
22 #include <asm/global_data.h>
24 DECLARE_GLOBAL_DATA_PTR;
26 #if CONFIG_IS_ENABLED(OFNODE_MULTI_TREE)
27 static void *oftree_list[CONFIG_OFNODE_MULTI_TREE_MAX];
28 static int oftree_count;
30 void oftree_reset(void)
32 if (gd->flags & GD_FLG_RELOC) {
34 oftree_list[oftree_count++] = (void *)gd->fdt_blob;
38 static int oftree_find(const void *fdt)
42 for (i = 0; i < oftree_count; i++) {
43 if (fdt == oftree_list[i])
50 static oftree oftree_ensure(void *fdt)
55 if (of_live_active()) {
56 struct device_node *root;
59 ret = unflatten_device_tree(fdt, &root);
61 log_err("Failed to create live tree: err=%d\n", ret);
64 tree = oftree_from_np(root);
69 if (gd->flags & GD_FLG_RELOC) {
72 if (oftree_count == CONFIG_OFNODE_MULTI_TREE_MAX) {
73 log_warning("Too many registered device trees (max %d)\n",
74 CONFIG_OFNODE_MULTI_TREE_MAX);
78 /* register the new tree */
81 log_debug("oftree: registered tree %d: %p\n", i, fdt);
84 if (fdt != gd->fdt_blob) {
85 log_debug("Only the control FDT can be accessed before relocation\n");
95 void oftree_dispose(oftree tree)
98 of_live_free(tree.np);
101 void *ofnode_lookup_fdt(ofnode node)
103 if (gd->flags & GD_FLG_RELOC) {
104 uint i = OFTREE_TREE_ID(node.of_offset);
106 if (i > oftree_count) {
107 log_debug("Invalid tree ID %x\n", i);
111 return oftree_list[i];
113 return (void *)gd->fdt_blob;
117 void *ofnode_to_fdt(ofnode node)
120 if (of_live_active())
123 if (CONFIG_IS_ENABLED(OFNODE_MULTI_TREE) && ofnode_valid(node))
124 return ofnode_lookup_fdt(node);
126 /* Use the control FDT by default */
127 return (void *)gd->fdt_blob;
131 * ofnode_to_offset() - convert an ofnode to a flat DT offset
133 * This cannot be called if the reference contains a node pointer.
135 * @node: Reference containing offset (possibly invalid)
136 * Return: DT offset (can be -1)
138 int ofnode_to_offset(ofnode node)
141 if (of_live_active())
144 if (CONFIG_IS_ENABLED(OFNODE_MULTI_TREE) && node.of_offset >= 0)
145 return OFTREE_OFFSET(node.of_offset);
147 return node.of_offset;
150 oftree oftree_from_fdt(void *fdt)
154 if (CONFIG_IS_ENABLED(OFNODE_MULTI_TREE))
155 return oftree_ensure(fdt);
158 if (of_live_active())
159 return oftree_null();
167 * noffset_to_ofnode() - convert a DT offset to an ofnode
169 * @other_node: Node in the same tree to use as a reference
170 * @of_offset: DT offset (either valid, or -1)
171 * Return: reference to the associated DT offset
173 ofnode noffset_to_ofnode(ofnode other_node, int of_offset)
177 if (of_live_active())
179 else if (!CONFIG_IS_ENABLED(OFNODE_MULTI_TREE) || of_offset < 0 ||
180 !ofnode_valid(other_node))
181 node.of_offset = of_offset;
183 node.of_offset = OFTREE_MAKE_NODE(other_node.of_offset,
189 #else /* !OFNODE_MULTI_TREE */
191 static inline int oftree_find(const void *fdt)
196 #endif /* OFNODE_MULTI_TREE */
199 * ofnode_from_tree_offset() - get an ofnode from a tree offset (flat tree)
201 * Looks up the tree and returns an ofnode with the correct of_offset (i.e.
202 * containing the tree ID).
204 * If @offset is < 0 then this returns an ofnode with that offset and no tree
207 * @tree: tree to check
208 * @offset: offset within that tree (can be < 0)
209 * @return node for that offset, with the correct ID
211 static ofnode ofnode_from_tree_offset(oftree tree, int offset)
215 if (CONFIG_IS_ENABLED(OFNODE_MULTI_TREE) && offset >= 0) {
216 int tree_id = oftree_find(tree.fdt);
219 return ofnode_null();
220 node.of_offset = OFTREE_NODE(tree_id, offset);
222 node.of_offset = offset;
228 bool ofnode_name_eq(ofnode node, const char *name)
230 const char *node_name;
233 assert(ofnode_valid(node));
235 node_name = ofnode_get_name(node);
236 len = strchrnul(node_name, '@') - node_name;
238 return (strlen(name) == len) && !strncmp(node_name, name, len);
241 int ofnode_read_u8(ofnode node, const char *propname, u8 *outp)
246 assert(ofnode_valid(node));
247 debug("%s: %s: ", __func__, propname);
249 if (ofnode_is_np(node))
250 return of_read_u8(ofnode_to_np(node), propname, outp);
252 cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
254 if (!cell || len < sizeof(*cell)) {
255 debug("(not found)\n");
259 debug("%#x (%d)\n", *outp, *outp);
264 u8 ofnode_read_u8_default(ofnode node, const char *propname, u8 def)
266 assert(ofnode_valid(node));
267 ofnode_read_u8(node, propname, &def);
272 int ofnode_read_u16(ofnode node, const char *propname, u16 *outp)
277 assert(ofnode_valid(node));
278 debug("%s: %s: ", __func__, propname);
280 if (ofnode_is_np(node))
281 return of_read_u16(ofnode_to_np(node), propname, outp);
283 cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
285 if (!cell || len < sizeof(*cell)) {
286 debug("(not found)\n");
289 *outp = be16_to_cpup(cell);
290 debug("%#x (%d)\n", *outp, *outp);
295 u16 ofnode_read_u16_default(ofnode node, const char *propname, u16 def)
297 assert(ofnode_valid(node));
298 ofnode_read_u16(node, propname, &def);
303 int ofnode_read_u32(ofnode node, const char *propname, u32 *outp)
305 return ofnode_read_u32_index(node, propname, 0, outp);
308 u32 ofnode_read_u32_default(ofnode node, const char *propname, u32 def)
310 assert(ofnode_valid(node));
311 ofnode_read_u32_index(node, propname, 0, &def);
316 int ofnode_read_u32_index(ofnode node, const char *propname, int index,
322 assert(ofnode_valid(node));
323 debug("%s: %s: ", __func__, propname);
325 if (ofnode_is_np(node))
326 return of_read_u32_index(ofnode_to_np(node), propname, index,
329 cell = fdt_getprop(ofnode_to_fdt(node), ofnode_to_offset(node),
332 debug("(not found)\n");
336 if (len < (sizeof(int) * (index + 1))) {
337 debug("(not large enough)\n");
341 *outp = fdt32_to_cpu(cell[index]);
342 debug("%#x (%d)\n", *outp, *outp);
347 u32 ofnode_read_u32_index_default(ofnode node, const char *propname, int index,
350 assert(ofnode_valid(node));
351 ofnode_read_u32_index(node, propname, index, &def);
356 int ofnode_read_s32_default(ofnode node, const char *propname, s32 def)
358 assert(ofnode_valid(node));
359 ofnode_read_u32(node, propname, (u32 *)&def);
364 int ofnode_read_u64(ofnode node, const char *propname, u64 *outp)
366 const unaligned_fdt64_t *cell;
369 assert(ofnode_valid(node));
370 debug("%s: %s: ", __func__, propname);
372 if (ofnode_is_np(node))
373 return of_read_u64(ofnode_to_np(node), propname, outp);
375 cell = fdt_getprop(ofnode_to_fdt(node), ofnode_to_offset(node),
377 if (!cell || len < sizeof(*cell)) {
378 debug("(not found)\n");
381 *outp = fdt64_to_cpu(cell[0]);
382 debug("%#llx (%lld)\n", (unsigned long long)*outp,
383 (unsigned long long)*outp);
388 u64 ofnode_read_u64_default(ofnode node, const char *propname, u64 def)
390 assert(ofnode_valid(node));
391 ofnode_read_u64(node, propname, &def);
396 bool ofnode_read_bool(ofnode node, const char *propname)
400 assert(ofnode_valid(node));
401 debug("%s: %s: ", __func__, propname);
403 prop = ofnode_get_property(node, propname, NULL);
405 debug("%s\n", prop ? "true" : "false");
407 return prop ? true : false;
410 const void *ofnode_read_prop(ofnode node, const char *propname, int *sizep)
412 const char *val = NULL;
415 assert(ofnode_valid(node));
416 debug("%s: %s: ", __func__, propname);
418 if (ofnode_is_np(node)) {
419 struct property *prop = of_find_property(
420 ofnode_to_np(node), propname, &len);
427 val = fdt_getprop(ofnode_to_fdt(node), ofnode_to_offset(node),
431 debug("<not found>\n");
433 *sizep = -FDT_ERR_NOTFOUND;
442 const char *ofnode_read_string(ofnode node, const char *propname)
447 str = ofnode_read_prop(node, propname, &len);
451 if (strnlen(str, len) >= len) {
452 debug("<invalid>\n");
460 int ofnode_read_size(ofnode node, const char *propname)
464 if (!ofnode_read_prop(node, propname, &len))
470 ofnode ofnode_find_subnode(ofnode node, const char *subnode_name)
474 assert(ofnode_valid(node));
475 debug("%s: %s: ", __func__, subnode_name);
477 if (ofnode_is_np(node)) {
478 struct device_node *np = ofnode_to_np(node);
480 for (np = np->child; np; np = np->sibling) {
481 if (!strcmp(subnode_name, np->name))
484 subnode = np_to_ofnode(np);
486 int ooffset = fdt_subnode_offset(ofnode_to_fdt(node),
487 ofnode_to_offset(node), subnode_name);
488 subnode = noffset_to_ofnode(node, ooffset);
490 debug("%s\n", ofnode_valid(subnode) ?
491 ofnode_get_name(subnode) : "<none>");
496 int ofnode_read_u32_array(ofnode node, const char *propname,
497 u32 *out_values, size_t sz)
499 assert(ofnode_valid(node));
500 debug("%s: %s: ", __func__, propname);
502 if (ofnode_is_np(node)) {
503 return of_read_u32_array(ofnode_to_np(node), propname,
508 ret = fdtdec_get_int_array(ofnode_to_fdt(node),
509 ofnode_to_offset(node), propname,
512 /* get the error right, but space is more important in SPL */
513 if (!IS_ENABLED(CONFIG_SPL_BUILD)) {
514 if (ret == -FDT_ERR_NOTFOUND)
516 else if (ret == -FDT_ERR_BADLAYOUT)
523 #if !CONFIG_IS_ENABLED(DM_INLINE_OFNODE)
524 bool ofnode_is_enabled(ofnode node)
526 if (ofnode_is_np(node)) {
527 return of_device_is_available(ofnode_to_np(node));
529 return fdtdec_get_is_enabled(ofnode_to_fdt(node),
530 ofnode_to_offset(node));
534 ofnode ofnode_first_subnode(ofnode node)
536 assert(ofnode_valid(node));
537 if (ofnode_is_np(node))
538 return np_to_ofnode(node.np->child);
540 return noffset_to_ofnode(node,
541 fdt_first_subnode(ofnode_to_fdt(node), ofnode_to_offset(node)));
544 ofnode ofnode_next_subnode(ofnode node)
546 assert(ofnode_valid(node));
547 if (ofnode_is_np(node))
548 return np_to_ofnode(node.np->sibling);
550 return noffset_to_ofnode(node,
551 fdt_next_subnode(ofnode_to_fdt(node), ofnode_to_offset(node)));
553 #endif /* !DM_INLINE_OFNODE */
555 ofnode ofnode_get_parent(ofnode node)
559 assert(ofnode_valid(node));
560 if (ofnode_is_np(node))
561 parent = np_to_ofnode(of_get_parent(ofnode_to_np(node)));
563 parent.of_offset = fdt_parent_offset(ofnode_to_fdt(node),
564 ofnode_to_offset(node));
569 const char *ofnode_get_name(ofnode node)
571 if (!ofnode_valid(node)) {
572 debug("%s node not valid\n", __func__);
576 if (ofnode_is_np(node))
577 return node.np->name;
579 return fdt_get_name(ofnode_to_fdt(node), ofnode_to_offset(node), NULL);
582 int ofnode_get_path(ofnode node, char *buf, int buflen)
584 assert(ofnode_valid(node));
586 if (ofnode_is_np(node)) {
587 if (strlen(node.np->full_name) >= buflen)
590 strcpy(buf, node.np->full_name);
596 res = fdt_get_path(ofnode_to_fdt(node), ofnode_to_offset(node), buf,
600 else if (res == -FDT_ERR_NOSPACE)
607 ofnode ofnode_get_by_phandle(uint phandle)
611 if (of_live_active())
612 node = np_to_ofnode(of_find_node_by_phandle(NULL, phandle));
614 node.of_offset = fdt_node_offset_by_phandle(gd->fdt_blob,
620 ofnode oftree_get_by_phandle(oftree tree, uint phandle)
624 if (of_live_active())
625 node = np_to_ofnode(of_find_node_by_phandle(tree.np, phandle));
627 node = ofnode_from_tree_offset(tree,
628 fdt_node_offset_by_phandle(oftree_lookup_fdt(tree),
634 static fdt_addr_t __ofnode_get_addr_size_index(ofnode node, int index,
635 fdt_size_t *size, bool translate)
640 *size = FDT_SIZE_T_NONE;
642 if (ofnode_is_np(node)) {
643 const __be32 *prop_val;
647 prop_val = of_get_address(ofnode_to_np(node), index, &size64,
650 return FDT_ADDR_T_NONE;
655 ns = of_n_size_cells(ofnode_to_np(node));
657 if (translate && IS_ENABLED(CONFIG_OF_TRANSLATE) && ns > 0) {
658 return of_translate_address(ofnode_to_np(node), prop_val);
660 na = of_n_addr_cells(ofnode_to_np(node));
661 return of_read_number(prop_val, na);
664 na = ofnode_read_simple_addr_cells(ofnode_get_parent(node));
665 ns = ofnode_read_simple_size_cells(ofnode_get_parent(node));
666 return fdtdec_get_addr_size_fixed(ofnode_to_fdt(node),
667 ofnode_to_offset(node), "reg",
673 fdt_addr_t ofnode_get_addr_size_index(ofnode node, int index, fdt_size_t *size)
675 return __ofnode_get_addr_size_index(node, index, size, true);
678 fdt_addr_t ofnode_get_addr_size_index_notrans(ofnode node, int index,
681 return __ofnode_get_addr_size_index(node, index, size, false);
684 fdt_addr_t ofnode_get_addr_index(ofnode node, int index)
688 return ofnode_get_addr_size_index(node, index, &size);
691 fdt_addr_t ofnode_get_addr(ofnode node)
693 return ofnode_get_addr_index(node, 0);
696 fdt_size_t ofnode_get_size(ofnode node)
700 ofnode_get_addr_size_index(node, 0, &size);
705 int ofnode_stringlist_search(ofnode node, const char *property,
708 if (ofnode_is_np(node)) {
709 return of_property_match_string(ofnode_to_np(node),
714 ret = fdt_stringlist_search(ofnode_to_fdt(node),
715 ofnode_to_offset(node), property,
717 if (ret == -FDT_ERR_NOTFOUND)
726 int ofnode_read_string_index(ofnode node, const char *property, int index,
729 if (ofnode_is_np(node)) {
730 return of_property_read_string_index(ofnode_to_np(node),
731 property, index, outp);
735 *outp = fdt_stringlist_get(ofnode_to_fdt(node),
736 ofnode_to_offset(node),
737 property, index, &len);
744 int ofnode_read_string_count(ofnode node, const char *property)
746 if (ofnode_is_np(node)) {
747 return of_property_count_strings(ofnode_to_np(node), property);
749 return fdt_stringlist_count(ofnode_to_fdt(node),
750 ofnode_to_offset(node), property);
754 int ofnode_read_string_list(ofnode node, const char *property,
762 count = ofnode_read_string_count(node, property);
768 prop = calloc(count + 1, sizeof(char *));
772 for (i = 0; i < count; i++)
773 ofnode_read_string_index(node, property, i, &prop[i]);
780 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in,
781 struct ofnode_phandle_args *out)
783 assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
784 out->node = offset_to_ofnode(in->node);
785 out->args_count = in->args_count;
786 memcpy(out->args, in->args, sizeof(out->args));
789 static void ofnode_from_of_phandle_args(struct of_phandle_args *in,
790 struct ofnode_phandle_args *out)
792 assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
793 out->node = np_to_ofnode(in->np);
794 out->args_count = in->args_count;
795 memcpy(out->args, in->args, sizeof(out->args));
798 int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
799 const char *cells_name, int cell_count,
801 struct ofnode_phandle_args *out_args)
803 if (ofnode_is_np(node)) {
804 struct of_phandle_args args;
807 ret = of_parse_phandle_with_args(ofnode_to_np(node),
808 list_name, cells_name,
813 ofnode_from_of_phandle_args(&args, out_args);
815 struct fdtdec_phandle_args args;
818 ret = fdtdec_parse_phandle_with_args(ofnode_to_fdt(node),
819 ofnode_to_offset(node),
820 list_name, cells_name,
821 cell_count, index, &args);
824 ofnode_from_fdtdec_phandle_args(&args, out_args);
830 int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
831 const char *cells_name, int cell_count)
833 if (ofnode_is_np(node))
834 return of_count_phandle_with_args(ofnode_to_np(node),
835 list_name, cells_name, cell_count);
837 return fdtdec_parse_phandle_with_args(ofnode_to_fdt(node),
838 ofnode_to_offset(node), list_name, cells_name,
839 cell_count, -1, NULL);
842 ofnode ofnode_path(const char *path)
844 if (of_live_active())
845 return np_to_ofnode(of_find_node_by_path(path));
847 return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
850 ofnode oftree_root(oftree tree)
852 if (of_live_active()) {
853 return np_to_ofnode(tree.np);
855 return ofnode_from_tree_offset(tree, 0);
859 ofnode oftree_path(oftree tree, const char *path)
861 if (of_live_active()) {
862 return np_to_ofnode(of_find_node_opts_by_path(tree.np, path,
864 } else if (*path != '/' && tree.fdt != gd->fdt_blob) {
865 return ofnode_null(); /* Aliases only on control FDT */
867 int offset = fdt_path_offset(tree.fdt, path);
869 return ofnode_from_tree_offset(tree, offset);
873 const void *ofnode_read_chosen_prop(const char *propname, int *sizep)
877 chosen_node = ofnode_path("/chosen");
879 return ofnode_read_prop(chosen_node, propname, sizep);
882 const char *ofnode_read_chosen_string(const char *propname)
884 return ofnode_read_chosen_prop(propname, NULL);
887 ofnode ofnode_get_chosen_node(const char *name)
891 prop = ofnode_read_chosen_prop(name, NULL);
893 return ofnode_null();
895 return ofnode_path(prop);
898 const void *ofnode_read_aliases_prop(const char *propname, int *sizep)
902 node = ofnode_path("/aliases");
904 return ofnode_read_prop(node, propname, sizep);
907 ofnode ofnode_get_aliases_node(const char *name)
911 prop = ofnode_read_aliases_prop(name, NULL);
913 return ofnode_null();
915 debug("%s: node_path: %s\n", __func__, prop);
917 return ofnode_path(prop);
920 int ofnode_get_child_count(ofnode parent)
925 ofnode_for_each_subnode(child, parent)
931 static int decode_timing_property(ofnode node, const char *name,
932 struct timing_entry *result)
936 length = ofnode_read_size(node, name);
938 debug("%s: could not find property %s\n",
939 ofnode_get_name(node), name);
943 if (length == sizeof(u32)) {
944 result->typ = ofnode_read_u32_default(node, name, 0);
945 result->min = result->typ;
946 result->max = result->typ;
948 ret = ofnode_read_u32_array(node, name, &result->min, 3);
954 int ofnode_decode_display_timing(ofnode parent, int index,
955 struct display_timing *dt)
958 ofnode timings, node;
962 timings = ofnode_find_subnode(parent, "display-timings");
963 if (!ofnode_valid(timings))
967 ofnode_for_each_subnode(node, timings) {
972 if (!ofnode_valid(node))
975 memset(dt, 0, sizeof(*dt));
977 ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
978 ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
979 ret |= decode_timing_property(node, "hactive", &dt->hactive);
980 ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
981 ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
982 ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
983 ret |= decode_timing_property(node, "vactive", &dt->vactive);
984 ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
985 ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
988 val = ofnode_read_u32_default(node, "vsync-active", -1);
990 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
991 DISPLAY_FLAGS_VSYNC_LOW;
993 val = ofnode_read_u32_default(node, "hsync-active", -1);
995 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
996 DISPLAY_FLAGS_HSYNC_LOW;
998 val = ofnode_read_u32_default(node, "de-active", -1);
1000 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1001 DISPLAY_FLAGS_DE_LOW;
1003 val = ofnode_read_u32_default(node, "pixelclk-active", -1);
1005 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1006 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1009 if (ofnode_read_bool(node, "interlaced"))
1010 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1011 if (ofnode_read_bool(node, "doublescan"))
1012 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1013 if (ofnode_read_bool(node, "doubleclk"))
1014 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1019 int ofnode_decode_panel_timing(ofnode parent,
1020 struct display_timing *dt)
1026 timings = ofnode_find_subnode(parent, "panel-timing");
1027 if (!ofnode_valid(timings))
1029 memset(dt, 0, sizeof(*dt));
1030 ret |= decode_timing_property(timings, "hback-porch", &dt->hback_porch);
1031 ret |= decode_timing_property(timings, "hfront-porch", &dt->hfront_porch);
1032 ret |= decode_timing_property(timings, "hactive", &dt->hactive);
1033 ret |= decode_timing_property(timings, "hsync-len", &dt->hsync_len);
1034 ret |= decode_timing_property(timings, "vback-porch", &dt->vback_porch);
1035 ret |= decode_timing_property(timings, "vfront-porch", &dt->vfront_porch);
1036 ret |= decode_timing_property(timings, "vactive", &dt->vactive);
1037 ret |= decode_timing_property(timings, "vsync-len", &dt->vsync_len);
1038 ret |= decode_timing_property(timings, "clock-frequency", &dt->pixelclock);
1040 if (!ofnode_read_u32(timings, "vsync-active", &val)) {
1041 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1042 DISPLAY_FLAGS_VSYNC_LOW;
1044 if (!ofnode_read_u32(timings, "hsync-active", &val)) {
1045 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1046 DISPLAY_FLAGS_HSYNC_LOW;
1048 if (!ofnode_read_u32(timings, "de-active", &val)) {
1049 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1050 DISPLAY_FLAGS_DE_LOW;
1052 if (!ofnode_read_u32(timings, "pixelclk-active", &val)) {
1053 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1054 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1056 if (ofnode_read_bool(timings, "interlaced"))
1057 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1058 if (ofnode_read_bool(timings, "doublescan"))
1059 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1060 if (ofnode_read_bool(timings, "doubleclk"))
1061 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1066 const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
1068 if (ofnode_is_np(node))
1069 return of_get_property(ofnode_to_np(node), propname, lenp);
1071 return fdt_getprop(ofnode_to_fdt(node), ofnode_to_offset(node),
1075 int ofnode_first_property(ofnode node, struct ofprop *prop)
1079 if (ofnode_is_np(node)) {
1080 prop->prop = of_get_first_property(ofnode_to_np(prop->node));
1082 return -FDT_ERR_NOTFOUND;
1085 fdt_first_property_offset(ofnode_to_fdt(node),
1086 ofnode_to_offset(prop->node));
1087 if (prop->offset < 0)
1088 return prop->offset;
1094 int ofnode_next_property(struct ofprop *prop)
1096 if (ofnode_is_np(prop->node)) {
1097 prop->prop = of_get_next_property(ofnode_to_np(prop->node),
1100 return -FDT_ERR_NOTFOUND;
1103 fdt_next_property_offset(ofnode_to_fdt(prop->node),
1105 if (prop->offset < 0)
1106 return prop->offset;
1112 const void *ofprop_get_property(const struct ofprop *prop,
1113 const char **propname, int *lenp)
1115 if (ofnode_is_np(prop->node))
1116 return of_get_property_by_prop(ofnode_to_np(prop->node),
1117 prop->prop, propname, lenp);
1119 return fdt_getprop_by_offset(ofnode_to_fdt(prop->node),
1124 fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property,
1127 if (ofnode_is_np(node)) {
1130 const struct device_node *np = ofnode_to_np(node);
1131 const __be32 *prop = of_get_property(np, property, &psize);
1134 return FDT_ADDR_T_NONE;
1135 na = of_n_addr_cells(np);
1136 ns = of_n_size_cells(np);
1137 *sizep = of_read_number(prop + na, ns);
1139 if (CONFIG_IS_ENABLED(OF_TRANSLATE) && ns > 0)
1140 return of_translate_address(np, prop);
1142 return of_read_number(prop, na);
1144 return fdtdec_get_addr_size(ofnode_to_fdt(node),
1145 ofnode_to_offset(node), property,
1150 const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
1153 if (ofnode_is_np(node)) {
1154 const struct device_node *np = ofnode_to_np(node);
1156 const __be32 *prop = of_get_property(np, propname, &psize);
1158 if (!prop || sz != psize)
1160 return (uint8_t *)prop;
1163 return fdtdec_locate_byte_array(ofnode_to_fdt(node),
1164 ofnode_to_offset(node), propname, sz);
1168 int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
1169 const char *propname, struct fdt_pci_addr *addr)
1171 const fdt32_t *cell;
1175 debug("%s: %s: ", __func__, propname);
1178 * If we follow the pci bus bindings strictly, we should check
1179 * the value of the node's parent node's #address-cells and
1180 * #size-cells. They need to be 3 and 2 accordingly. However,
1181 * for simplicity we skip the check here.
1183 cell = ofnode_get_property(node, propname, &len);
1187 if ((len % FDT_PCI_REG_SIZE) == 0) {
1188 int num = len / FDT_PCI_REG_SIZE;
1191 for (i = 0; i < num; i++) {
1192 debug("pci address #%d: %08lx %08lx %08lx\n", i,
1193 (ulong)fdt32_to_cpu(cell[0]),
1194 (ulong)fdt32_to_cpu(cell[1]),
1195 (ulong)fdt32_to_cpu(cell[2]));
1196 if ((fdt32_to_cpu(*cell) & type) == type) {
1197 addr->phys_hi = fdt32_to_cpu(cell[0]);
1198 addr->phys_mid = fdt32_to_cpu(cell[1]);
1199 addr->phys_lo = fdt32_to_cpu(cell[2]);
1203 cell += (FDT_PCI_ADDR_CELLS +
1204 FDT_PCI_SIZE_CELLS);
1218 debug("(not found)\n");
1222 int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device)
1224 const char *list, *end;
1227 list = ofnode_get_property(node, "compatible", &len);
1232 while (list < end) {
1234 if (len >= strlen("pciVVVV,DDDD")) {
1235 char *s = strstr(list, "pci");
1238 * check if the string is something like pciVVVV,DDDD.RR
1239 * or just pciVVVV,DDDD
1241 if (s && s[7] == ',' &&
1242 (s[12] == '.' || s[12] == 0)) {
1244 *vendor = simple_strtol(s, NULL, 16);
1247 *device = simple_strtol(s, NULL, 16);
1258 int ofnode_read_eth_phy_id(ofnode node, u16 *vendor, u16 *device)
1260 const char *list, *end;
1263 list = ofnode_get_property(node, "compatible", &len);
1269 while (list < end) {
1272 if (len >= strlen("ethernet-phy-idVVVV.DDDD")) {
1273 char *s = strstr(list, "ethernet-phy-id");
1276 * check if the string is something like
1277 * ethernet-phy-idVVVV.DDDD
1279 if (s && s[19] == '.') {
1280 s += strlen("ethernet-phy-id");
1281 *vendor = simple_strtol(s, NULL, 16);
1283 *device = simple_strtol(s, NULL, 16);
1294 int ofnode_read_addr_cells(ofnode node)
1296 if (ofnode_is_np(node)) {
1297 return of_n_addr_cells(ofnode_to_np(node));
1299 int parent = fdt_parent_offset(ofnode_to_fdt(node),
1300 ofnode_to_offset(node));
1302 return fdt_address_cells(ofnode_to_fdt(node), parent);
1306 int ofnode_read_size_cells(ofnode node)
1308 if (ofnode_is_np(node)) {
1309 return of_n_size_cells(ofnode_to_np(node));
1311 int parent = fdt_parent_offset(ofnode_to_fdt(node),
1312 ofnode_to_offset(node));
1314 return fdt_size_cells(ofnode_to_fdt(node), parent);
1318 int ofnode_read_simple_addr_cells(ofnode node)
1320 if (ofnode_is_np(node))
1321 return of_simple_addr_cells(ofnode_to_np(node));
1323 return fdt_address_cells(ofnode_to_fdt(node),
1324 ofnode_to_offset(node));
1327 int ofnode_read_simple_size_cells(ofnode node)
1329 if (ofnode_is_np(node))
1330 return of_simple_size_cells(ofnode_to_np(node));
1332 return fdt_size_cells(ofnode_to_fdt(node),
1333 ofnode_to_offset(node));
1336 bool ofnode_pre_reloc(ofnode node)
1338 #if defined(CONFIG_SPL_BUILD) || defined(CONFIG_TPL_BUILD)
1339 /* for SPL and TPL the remaining nodes after the fdtgrep 1st pass
1340 * had property bootph-all or bootph-pre-sram/bootph-pre-ram.
1341 * They are removed in final dtb (fdtgrep 2nd pass)
1345 if (ofnode_read_bool(node, "bootph-all"))
1347 if (ofnode_read_bool(node, "bootph-some-ram"))
1351 * In regular builds individual spl and tpl handling both
1352 * count as handled pre-relocation for later second init.
1354 if (ofnode_read_bool(node, "bootph-pre-ram") ||
1355 ofnode_read_bool(node, "bootph-pre-sram"))
1358 if (IS_ENABLED(CONFIG_OF_TAG_MIGRATE)) {
1359 /* detect and handle old tags */
1360 if (ofnode_read_bool(node, "u-boot,dm-pre-reloc") ||
1361 ofnode_read_bool(node, "u-boot,dm-pre-proper") ||
1362 ofnode_read_bool(node, "u-boot,dm-spl") ||
1363 ofnode_read_bool(node, "u-boot,dm-tpl") ||
1364 ofnode_read_bool(node, "u-boot,dm-vpl")) {
1365 gd->flags |= GD_FLG_OF_TAG_MIGRATE;
1374 int ofnode_read_resource(ofnode node, uint index, struct resource *res)
1376 if (ofnode_is_np(node)) {
1377 return of_address_to_resource(ofnode_to_np(node), index, res);
1379 struct fdt_resource fres;
1382 ret = fdt_get_resource(ofnode_to_fdt(node),
1383 ofnode_to_offset(node),
1384 "reg", index, &fres);
1387 memset(res, '\0', sizeof(*res));
1388 res->start = fres.start;
1389 res->end = fres.end;
1395 int ofnode_read_resource_byname(ofnode node, const char *name,
1396 struct resource *res)
1400 index = ofnode_stringlist_search(node, "reg-names", name);
1404 return ofnode_read_resource(node, index, res);
1407 u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr)
1409 if (ofnode_is_np(node))
1410 return of_translate_address(ofnode_to_np(node), in_addr);
1412 return fdt_translate_address(ofnode_to_fdt(node),
1413 ofnode_to_offset(node), in_addr);
1416 u64 ofnode_translate_dma_address(ofnode node, const fdt32_t *in_addr)
1418 if (ofnode_is_np(node))
1419 return of_translate_dma_address(ofnode_to_np(node), in_addr);
1421 return fdt_translate_dma_address(ofnode_to_fdt(node),
1422 ofnode_to_offset(node), in_addr);
1425 int ofnode_get_dma_range(ofnode node, phys_addr_t *cpu, dma_addr_t *bus, u64 *size)
1427 if (ofnode_is_np(node))
1428 return of_get_dma_range(ofnode_to_np(node), cpu, bus, size);
1430 return fdt_get_dma_range(ofnode_to_fdt(node),
1431 ofnode_to_offset(node),
1435 int ofnode_device_is_compatible(ofnode node, const char *compat)
1437 if (ofnode_is_np(node))
1438 return of_device_is_compatible(ofnode_to_np(node), compat,
1441 return !fdt_node_check_compatible(ofnode_to_fdt(node),
1442 ofnode_to_offset(node),
1446 ofnode ofnode_by_compatible(ofnode from, const char *compat)
1448 if (of_live_active()) {
1449 return np_to_ofnode(of_find_compatible_node(
1450 (struct device_node *)ofnode_to_np(from), NULL,
1453 return noffset_to_ofnode(from,
1454 fdt_node_offset_by_compatible(ofnode_to_fdt(from),
1455 ofnode_to_offset(from), compat));
1459 ofnode ofnode_by_prop_value(ofnode from, const char *propname,
1460 const void *propval, int proplen)
1462 if (of_live_active()) {
1463 return np_to_ofnode(of_find_node_by_prop_value(
1464 (struct device_node *)ofnode_to_np(from), propname,
1467 return noffset_to_ofnode(from,
1468 fdt_node_offset_by_prop_value(ofnode_to_fdt(from),
1469 ofnode_to_offset(from), propname, propval,
1474 int ofnode_write_prop(ofnode node, const char *propname, const void *value,
1477 if (of_live_active()) {
1482 newval = malloc(len);
1484 return log_ret(-ENOMEM);
1485 memcpy(newval, value, len);
1488 ret = of_write_prop(ofnode_to_np(node), propname, len, value);
1493 return fdt_setprop(ofnode_to_fdt(node), ofnode_to_offset(node),
1494 propname, value, len);
1498 int ofnode_write_string(ofnode node, const char *propname, const char *value)
1500 assert(ofnode_valid(node));
1502 debug("%s: %s = %s", __func__, propname, value);
1504 return ofnode_write_prop(node, propname, value, strlen(value) + 1,
1508 int ofnode_write_u32(ofnode node, const char *propname, u32 value)
1512 assert(ofnode_valid(node));
1514 log_debug("%s = %x", propname, value);
1515 val = malloc(sizeof(*val));
1518 *val = cpu_to_fdt32(value);
1520 return ofnode_write_prop(node, propname, val, sizeof(value), false);
1523 int ofnode_set_enabled(ofnode node, bool value)
1525 assert(ofnode_valid(node));
1528 return ofnode_write_string(node, "status", "okay");
1530 return ofnode_write_string(node, "status", "disabled");
1533 bool ofnode_conf_read_bool(const char *prop_name)
1537 node = ofnode_path("/config");
1538 if (!ofnode_valid(node))
1541 return ofnode_read_bool(node, prop_name);
1544 int ofnode_conf_read_int(const char *prop_name, int default_val)
1548 node = ofnode_path("/config");
1549 if (!ofnode_valid(node))
1552 return ofnode_read_u32_default(node, prop_name, default_val);
1555 const char *ofnode_conf_read_str(const char *prop_name)
1559 node = ofnode_path("/config");
1560 if (!ofnode_valid(node))
1563 return ofnode_read_string(node, prop_name);
1566 ofnode ofnode_get_phy_node(ofnode node)
1568 /* DT node properties that reference a PHY node */
1569 static const char * const phy_handle_str[] = {
1570 "phy-handle", "phy", "phy-device",
1572 struct ofnode_phandle_args args = {
1573 .node = ofnode_null()
1577 assert(ofnode_valid(node));
1579 for (i = 0; i < ARRAY_SIZE(phy_handle_str); i++)
1580 if (!ofnode_parse_phandle_with_args(node, phy_handle_str[i],
1587 phy_interface_t ofnode_read_phy_mode(ofnode node)
1592 assert(ofnode_valid(node));
1594 mode = ofnode_read_string(node, "phy-mode");
1596 mode = ofnode_read_string(node, "phy-connection-type");
1599 return PHY_INTERFACE_MODE_NA;
1601 for (i = 0; i < PHY_INTERFACE_MODE_MAX; i++)
1602 if (!strcmp(mode, phy_interface_strings[i]))
1605 debug("%s: Invalid PHY interface '%s'\n", __func__, mode);
1607 return PHY_INTERFACE_MODE_NA;
1610 int ofnode_add_subnode(ofnode node, const char *name, ofnode *subnodep)
1615 assert(ofnode_valid(node));
1617 if (ofnode_is_np(node)) {
1618 struct device_node *np, *child;
1620 np = (struct device_node *)ofnode_to_np(node);
1621 ret = of_add_subnode(np, name, -1, &child);
1622 if (ret && ret != -EEXIST)
1624 subnode = np_to_ofnode(child);
1626 void *fdt = ofnode_to_fdt(node);
1627 int poffset = ofnode_to_offset(node);
1630 offset = fdt_add_subnode(fdt, poffset, name);
1631 if (offset == -FDT_ERR_EXISTS) {
1632 offset = fdt_subnode_offset(fdt, poffset, name);
1637 subnode = noffset_to_ofnode(node, offset);
1640 *subnodep = subnode;
1642 return ret; /* 0 or -EEXIST */
1645 int ofnode_copy_props(ofnode src, ofnode dst)
1649 ofnode_for_each_prop(prop, src) {
1654 val = ofprop_get_property(&prop, &name, &len);
1656 log_debug("Cannot read prop (err=%d)\n", len);
1657 return log_msg_ret("get", -EINVAL);
1659 ret = ofnode_write_prop(dst, name, val, len, true);
1661 log_debug("Cannot write prop (err=%d)\n", ret);
1662 return log_msg_ret("wr", -EINVAL);