2 * Copyright (c) 2017 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
5 * SPDX-License-Identifier: GPL-2.0+
11 #include <fdt_support.h>
13 #include <dm/of_access.h>
14 #include <dm/of_addr.h>
15 #include <dm/ofnode.h>
16 #include <linux/err.h>
17 #include <linux/ioport.h>
19 int ofnode_read_u32(ofnode node
, const char *propname
, u32
*outp
)
21 assert(ofnode_valid(node
));
22 debug("%s: %s: ", __func__
, propname
);
24 if (ofnode_is_np(node
)) {
25 return of_read_u32(ofnode_to_np(node
), propname
, outp
);
30 cell
= fdt_getprop(gd
->fdt_blob
, ofnode_to_offset(node
),
32 if (!cell
|| len
< sizeof(int)) {
33 debug("(not found)\n");
36 *outp
= fdt32_to_cpu(cell
[0]);
38 debug("%#x (%d)\n", *outp
, *outp
);
43 int ofnode_read_u32_default(ofnode node
, const char *propname
, u32 def
)
45 assert(ofnode_valid(node
));
46 ofnode_read_u32(node
, propname
, &def
);
51 int ofnode_read_s32_default(ofnode node
, const char *propname
, s32 def
)
53 assert(ofnode_valid(node
));
54 ofnode_read_u32(node
, propname
, (u32
*)&def
);
59 bool ofnode_read_bool(ofnode node
, const char *propname
)
63 assert(ofnode_valid(node
));
64 debug("%s: %s: ", __func__
, propname
);
66 prop
= ofnode_get_property(node
, propname
, NULL
);
68 debug("%s\n", prop
? "true" : "false");
70 return prop
? true : false;
73 const char *ofnode_read_string(ofnode node
, const char *propname
)
75 const char *str
= NULL
;
78 assert(ofnode_valid(node
));
79 debug("%s: %s: ", __func__
, propname
);
81 if (ofnode_is_np(node
)) {
82 struct property
*prop
= of_find_property(
83 ofnode_to_np(node
), propname
, NULL
);
90 str
= fdt_getprop(gd
->fdt_blob
, ofnode_to_offset(node
),
94 debug("<not found>\n");
97 if (strnlen(str
, len
) >= len
) {
106 ofnode
ofnode_find_subnode(ofnode node
, const char *subnode_name
)
110 assert(ofnode_valid(node
));
111 debug("%s: %s: ", __func__
, subnode_name
);
113 if (ofnode_is_np(node
)) {
114 const struct device_node
*np
= ofnode_to_np(node
);
116 for (np
= np
->child
; np
; np
= np
->sibling
) {
117 if (!strcmp(subnode_name
, np
->name
))
120 subnode
= np_to_ofnode(np
);
122 int ooffset
= fdt_subnode_offset(gd
->fdt_blob
,
123 ofnode_to_offset(node
), subnode_name
);
124 subnode
= offset_to_ofnode(ooffset
);
126 debug("%s\n", ofnode_valid(subnode
) ?
127 ofnode_get_name(subnode
) : "<none>");
132 int ofnode_read_u32_array(ofnode node
, const char *propname
,
133 u32
*out_values
, size_t sz
)
135 assert(ofnode_valid(node
));
136 debug("%s: %s: ", __func__
, propname
);
138 if (ofnode_is_np(node
)) {
139 return of_read_u32_array(ofnode_to_np(node
), propname
,
142 return fdtdec_get_int_array(gd
->fdt_blob
,
143 ofnode_to_offset(node
), propname
,
148 ofnode
ofnode_first_subnode(ofnode node
)
150 assert(ofnode_valid(node
));
151 if (ofnode_is_np(node
))
152 return np_to_ofnode(node
.np
->child
);
154 return offset_to_ofnode(
155 fdt_first_subnode(gd
->fdt_blob
, ofnode_to_offset(node
)));
158 ofnode
ofnode_next_subnode(ofnode node
)
160 assert(ofnode_valid(node
));
161 if (ofnode_is_np(node
))
162 return np_to_ofnode(node
.np
->sibling
);
164 return offset_to_ofnode(
165 fdt_next_subnode(gd
->fdt_blob
, ofnode_to_offset(node
)));
168 const char *ofnode_get_name(ofnode node
)
170 assert(ofnode_valid(node
));
171 if (ofnode_is_np(node
))
172 return strrchr(node
.np
->full_name
, '/') + 1;
174 return fdt_get_name(gd
->fdt_blob
, ofnode_to_offset(node
), NULL
);
177 int ofnode_read_size(ofnode node
, const char *propname
)
181 if (ofnode_is_np(node
)) {
182 struct property
*prop
= of_find_property(
183 ofnode_to_np(node
), propname
, NULL
);
188 if (fdt_getprop(gd
->fdt_blob
, ofnode_to_offset(node
), propname
,
196 fdt_addr_t
ofnode_get_addr_index(ofnode node
, int index
)
198 if (ofnode_is_np(node
)) {
199 const __be32
*prop_val
;
204 prop_val
= of_get_address(ofnode_to_np(node
), index
, &size
,
207 return FDT_ADDR_T_NONE
;
209 if (IS_ENABLED(CONFIG_OF_TRANSLATE
)) {
210 return of_translate_address(ofnode_to_np(node
), prop_val
);
212 na
= of_n_addr_cells(ofnode_to_np(node
));
213 return of_read_number(prop_val
, na
);
216 return fdt_get_base_address(gd
->fdt_blob
,
217 ofnode_to_offset(node
));
220 return FDT_ADDR_T_NONE
;
223 fdt_addr_t
ofnode_get_addr(ofnode node
)
225 return ofnode_get_addr_index(node
, 0);
228 int ofnode_stringlist_search(ofnode node
, const char *property
,
231 if (ofnode_is_np(node
)) {
232 return of_property_match_string(ofnode_to_np(node
),
237 ret
= fdt_stringlist_search(gd
->fdt_blob
,
238 ofnode_to_offset(node
), property
,
240 if (ret
== -FDT_ERR_NOTFOUND
)
249 int ofnode_read_string_index(ofnode node
, const char *property
, int index
,
252 if (ofnode_is_np(node
)) {
253 return of_property_read_string_index(ofnode_to_np(node
),
254 property
, index
, outp
);
258 *outp
= fdt_stringlist_get(gd
->fdt_blob
, ofnode_to_offset(node
),
259 property
, index
, &len
);
266 int ofnode_read_string_count(ofnode node
, const char *property
)
268 if (ofnode_is_np(node
)) {
269 return of_property_count_strings(ofnode_to_np(node
), property
);
271 return fdt_stringlist_count(gd
->fdt_blob
,
272 ofnode_to_offset(node
), property
);
276 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args
*in
,
277 struct ofnode_phandle_args
*out
)
279 assert(OF_MAX_PHANDLE_ARGS
== MAX_PHANDLE_ARGS
);
280 out
->node
= offset_to_ofnode(in
->node
);
281 out
->args_count
= in
->args_count
;
282 memcpy(out
->args
, in
->args
, sizeof(out
->args
));
285 static void ofnode_from_of_phandle_args(struct of_phandle_args
*in
,
286 struct ofnode_phandle_args
*out
)
288 assert(OF_MAX_PHANDLE_ARGS
== MAX_PHANDLE_ARGS
);
289 out
->node
= np_to_ofnode(in
->np
);
290 out
->args_count
= in
->args_count
;
291 memcpy(out
->args
, in
->args
, sizeof(out
->args
));
294 int ofnode_parse_phandle_with_args(ofnode node
, const char *list_name
,
295 const char *cells_name
, int cell_count
,
297 struct ofnode_phandle_args
*out_args
)
299 if (ofnode_is_np(node
)) {
300 struct of_phandle_args args
;
303 ret
= of_parse_phandle_with_args(ofnode_to_np(node
),
304 list_name
, cells_name
, index
,
308 ofnode_from_of_phandle_args(&args
, out_args
);
310 struct fdtdec_phandle_args args
;
313 ret
= fdtdec_parse_phandle_with_args(gd
->fdt_blob
,
314 ofnode_to_offset(node
),
315 list_name
, cells_name
,
316 cell_count
, index
, &args
);
319 ofnode_from_fdtdec_phandle_args(&args
, out_args
);
325 int ofnode_count_phandle_with_args(ofnode node
, const char *list_name
,
326 const char *cells_name
)
328 if (ofnode_is_np(node
))
329 return of_count_phandle_with_args(ofnode_to_np(node
),
330 list_name
, cells_name
);
332 return fdtdec_parse_phandle_with_args(gd
->fdt_blob
,
333 ofnode_to_offset(node
), list_name
, cells_name
,
337 ofnode
ofnode_path(const char *path
)
339 if (of_live_active())
340 return np_to_ofnode(of_find_node_by_path(path
));
342 return offset_to_ofnode(fdt_path_offset(gd
->fdt_blob
, path
));
345 const char *ofnode_get_chosen_prop(const char *name
)
349 chosen_node
= ofnode_path("/chosen");
351 return ofnode_read_string(chosen_node
, name
);
354 ofnode
ofnode_get_chosen_node(const char *name
)
358 prop
= ofnode_get_chosen_prop(name
);
360 return ofnode_null();
362 return ofnode_path(prop
);
365 static int decode_timing_property(ofnode node
, const char *name
,
366 struct timing_entry
*result
)
370 length
= ofnode_read_size(node
, name
);
372 debug("%s: could not find property %s\n",
373 ofnode_get_name(node
), name
);
377 if (length
== sizeof(u32
)) {
378 result
->typ
= ofnode_read_u32_default(node
, name
, 0);
379 result
->min
= result
->typ
;
380 result
->max
= result
->typ
;
382 ret
= ofnode_read_u32_array(node
, name
, &result
->min
, 3);
388 int ofnode_decode_display_timing(ofnode parent
, int index
,
389 struct display_timing
*dt
)
392 ofnode timings
, node
;
396 timings
= ofnode_find_subnode(parent
, "display-timings");
397 if (!ofnode_valid(timings
))
401 ofnode_for_each_subnode(node
, timings
) {
406 if (!ofnode_valid(node
))
409 memset(dt
, 0, sizeof(*dt
));
411 ret
|= decode_timing_property(node
, "hback-porch", &dt
->hback_porch
);
412 ret
|= decode_timing_property(node
, "hfront-porch", &dt
->hfront_porch
);
413 ret
|= decode_timing_property(node
, "hactive", &dt
->hactive
);
414 ret
|= decode_timing_property(node
, "hsync-len", &dt
->hsync_len
);
415 ret
|= decode_timing_property(node
, "vback-porch", &dt
->vback_porch
);
416 ret
|= decode_timing_property(node
, "vfront-porch", &dt
->vfront_porch
);
417 ret
|= decode_timing_property(node
, "vactive", &dt
->vactive
);
418 ret
|= decode_timing_property(node
, "vsync-len", &dt
->vsync_len
);
419 ret
|= decode_timing_property(node
, "clock-frequency", &dt
->pixelclock
);
422 val
= ofnode_read_u32_default(node
, "vsync-active", -1);
424 dt
->flags
|= val
? DISPLAY_FLAGS_VSYNC_HIGH
:
425 DISPLAY_FLAGS_VSYNC_LOW
;
427 val
= ofnode_read_u32_default(node
, "hsync-active", -1);
429 dt
->flags
|= val
? DISPLAY_FLAGS_HSYNC_HIGH
:
430 DISPLAY_FLAGS_HSYNC_LOW
;
432 val
= ofnode_read_u32_default(node
, "de-active", -1);
434 dt
->flags
|= val
? DISPLAY_FLAGS_DE_HIGH
:
435 DISPLAY_FLAGS_DE_LOW
;
437 val
= ofnode_read_u32_default(node
, "pixelclk-active", -1);
439 dt
->flags
|= val
? DISPLAY_FLAGS_PIXDATA_POSEDGE
:
440 DISPLAY_FLAGS_PIXDATA_NEGEDGE
;
443 if (ofnode_read_bool(node
, "interlaced"))
444 dt
->flags
|= DISPLAY_FLAGS_INTERLACED
;
445 if (ofnode_read_bool(node
, "doublescan"))
446 dt
->flags
|= DISPLAY_FLAGS_DOUBLESCAN
;
447 if (ofnode_read_bool(node
, "doubleclk"))
448 dt
->flags
|= DISPLAY_FLAGS_DOUBLECLK
;
453 const void *ofnode_get_property(ofnode node
, const char *propname
, int *lenp
)
455 if (ofnode_is_np(node
))
456 return of_get_property(ofnode_to_np(node
), propname
, lenp
);
458 return fdt_getprop(gd
->fdt_blob
, ofnode_to_offset(node
),
462 bool ofnode_is_available(ofnode node
)
464 if (ofnode_is_np(node
))
465 return of_device_is_available(ofnode_to_np(node
));
467 return fdtdec_get_is_enabled(gd
->fdt_blob
,
468 ofnode_to_offset(node
));
471 fdt_addr_t
ofnode_get_addr_size(ofnode node
, const char *property
,
474 if (ofnode_is_np(node
)) {
477 const struct device_node
*np
= ofnode_to_np(node
);
478 const __be32
*prop
= of_get_property(np
, property
, &psize
);
481 return FDT_ADDR_T_NONE
;
482 na
= of_n_addr_cells(np
);
483 ns
= of_n_addr_cells(np
);
484 *sizep
= of_read_number(prop
+ na
, ns
);
485 return of_read_number(prop
, na
);
487 return fdtdec_get_addr_size(gd
->fdt_blob
,
488 ofnode_to_offset(node
), property
,
493 const uint8_t *ofnode_read_u8_array_ptr(ofnode node
, const char *propname
,
496 if (ofnode_is_np(node
)) {
497 const struct device_node
*np
= ofnode_to_np(node
);
499 const __be32
*prop
= of_get_property(np
, propname
, &psize
);
501 if (!prop
|| sz
!= psize
)
503 return (uint8_t *)prop
;
506 return fdtdec_locate_byte_array(gd
->fdt_blob
,
507 ofnode_to_offset(node
), propname
, sz
);
511 int ofnode_read_pci_addr(ofnode node
, enum fdt_pci_space type
,
512 const char *propname
, struct fdt_pci_addr
*addr
)
518 debug("%s: %s: ", __func__
, propname
);
521 * If we follow the pci bus bindings strictly, we should check
522 * the value of the node's parent node's #address-cells and
523 * #size-cells. They need to be 3 and 2 accordingly. However,
524 * for simplicity we skip the check here.
526 cell
= ofnode_get_property(node
, propname
, &len
);
530 if ((len
% FDT_PCI_REG_SIZE
) == 0) {
531 int num
= len
/ FDT_PCI_REG_SIZE
;
534 for (i
= 0; i
< num
; i
++) {
535 debug("pci address #%d: %08lx %08lx %08lx\n", i
,
536 (ulong
)fdt32_to_cpu(cell
[0]),
537 (ulong
)fdt32_to_cpu(cell
[1]),
538 (ulong
)fdt32_to_cpu(cell
[2]));
539 if ((fdt32_to_cpu(*cell
) & type
) == type
) {
540 addr
->phys_hi
= fdt32_to_cpu(cell
[0]);
541 addr
->phys_mid
= fdt32_to_cpu(cell
[1]);
542 addr
->phys_lo
= fdt32_to_cpu(cell
[1]);
546 cell
+= (FDT_PCI_ADDR_CELLS
+
561 debug("(not found)\n");
565 int ofnode_read_addr_cells(ofnode node
)
567 if (ofnode_is_np(node
))
568 return of_n_addr_cells(ofnode_to_np(node
));
569 else /* NOTE: this call should walk up the parent stack */
570 return fdt_address_cells(gd
->fdt_blob
, ofnode_to_offset(node
));
573 int ofnode_read_size_cells(ofnode node
)
575 if (ofnode_is_np(node
))
576 return of_n_size_cells(ofnode_to_np(node
));
577 else /* NOTE: this call should walk up the parent stack */
578 return fdt_size_cells(gd
->fdt_blob
, ofnode_to_offset(node
));
581 int ofnode_read_simple_addr_cells(ofnode node
)
583 if (ofnode_is_np(node
))
584 return of_simple_addr_cells(ofnode_to_np(node
));
586 return fdt_address_cells(gd
->fdt_blob
, ofnode_to_offset(node
));
589 int ofnode_read_simple_size_cells(ofnode node
)
591 if (ofnode_is_np(node
))
592 return of_simple_size_cells(ofnode_to_np(node
));
594 return fdt_size_cells(gd
->fdt_blob
, ofnode_to_offset(node
));
597 bool ofnode_pre_reloc(ofnode node
)
599 if (ofnode_read_bool(node
, "u-boot,dm-pre-reloc"))
602 #ifdef CONFIG_TPL_BUILD
603 if (ofnode_read_bool(node
, "u-boot,dm-tpl"))
605 #elif defined(CONFIG_SPL_BUILD)
606 if (ofnode_read_bool(node
, "u-boot,dm-spl"))
610 * In regular builds individual spl and tpl handling both
611 * count as handled pre-relocation for later second init.
613 if (ofnode_read_bool(node
, "u-boot,dm-spl") ||
614 ofnode_read_bool(node
, "u-boot,dm-tpl"))
621 int ofnode_read_resource(ofnode node
, uint index
, struct resource
*res
)
623 if (ofnode_is_np(node
)) {
624 return of_address_to_resource(ofnode_to_np(node
), index
, res
);
626 struct fdt_resource fres
;
629 ret
= fdt_get_resource(gd
->fdt_blob
, ofnode_to_offset(node
),
630 "reg", index
, &fres
);
633 memset(res
, '\0', sizeof(*res
));
634 res
->start
= fres
.start
;
641 int ofnode_read_resource_byname(ofnode node
, const char *name
,
642 struct resource
*res
)
646 index
= ofnode_stringlist_search(node
, "reg-names", name
);
650 return ofnode_read_resource(node
, index
, res
);
653 u64
ofnode_translate_address(ofnode node
, const fdt32_t
*in_addr
)
655 if (ofnode_is_np(node
))
656 return of_translate_address(ofnode_to_np(node
), in_addr
);
658 return fdt_translate_address(gd
->fdt_blob
, ofnode_to_offset(node
), in_addr
);