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>
18 int ofnode_read_u32(ofnode node
, const char *propname
, u32
*outp
)
20 assert(ofnode_valid(node
));
21 debug("%s: %s: ", __func__
, propname
);
23 if (ofnode_is_np(node
)) {
24 return of_read_u32(ofnode_to_np(node
), propname
, outp
);
29 cell
= fdt_getprop(gd
->fdt_blob
, ofnode_to_offset(node
),
31 if (!cell
|| len
< sizeof(int)) {
32 debug("(not found)\n");
35 *outp
= fdt32_to_cpu(cell
[0]);
37 debug("%#x (%d)\n", *outp
, *outp
);
42 int ofnode_read_u32_default(ofnode node
, const char *propname
, u32 def
)
44 assert(ofnode_valid(node
));
45 ofnode_read_u32(node
, propname
, &def
);
50 int ofnode_read_s32_default(ofnode node
, const char *propname
, s32 def
)
52 assert(ofnode_valid(node
));
53 ofnode_read_u32(node
, propname
, (u32
*)&def
);
58 bool ofnode_read_bool(ofnode node
, const char *propname
)
62 assert(ofnode_valid(node
));
63 debug("%s: %s: ", __func__
, propname
);
65 if (ofnode_is_np(node
)) {
66 val
= !!of_find_property(ofnode_to_np(node
), propname
, NULL
);
68 val
= !!fdt_getprop(gd
->fdt_blob
, ofnode_to_offset(node
),
71 debug("%s\n", val
? "true" : "false");
76 const char *ofnode_read_string(ofnode node
, const char *propname
)
78 const char *str
= NULL
;
81 assert(ofnode_valid(node
));
82 debug("%s: %s: ", __func__
, propname
);
84 if (ofnode_is_np(node
)) {
85 struct property
*prop
= of_find_property(
86 ofnode_to_np(node
), propname
, NULL
);
93 str
= fdt_getprop(gd
->fdt_blob
, ofnode_to_offset(node
),
97 debug("<not found>\n");
100 if (strnlen(str
, len
) >= len
) {
101 debug("<invalid>\n");
109 ofnode
ofnode_find_subnode(ofnode node
, const char *subnode_name
)
113 assert(ofnode_valid(node
));
114 debug("%s: %s: ", __func__
, subnode_name
);
116 if (ofnode_is_np(node
)) {
117 const struct device_node
*np
= ofnode_to_np(node
);
119 for (np
= np
->child
; np
; np
= np
->sibling
) {
120 if (!strcmp(subnode_name
, np
->name
))
123 subnode
= np_to_ofnode(np
);
125 int ooffset
= fdt_subnode_offset(gd
->fdt_blob
,
126 ofnode_to_offset(node
), subnode_name
);
127 subnode
= offset_to_ofnode(ooffset
);
129 debug("%s\n", ofnode_valid(subnode
) ?
130 ofnode_get_name(subnode
) : "<none>");
135 int ofnode_read_u32_array(ofnode node
, const char *propname
,
136 u32
*out_values
, size_t sz
)
138 assert(ofnode_valid(node
));
139 debug("%s: %s: ", __func__
, propname
);
141 if (ofnode_is_np(node
)) {
142 return of_read_u32_array(ofnode_to_np(node
), propname
,
145 return fdtdec_get_int_array(gd
->fdt_blob
,
146 ofnode_to_offset(node
), propname
,
151 ofnode
ofnode_first_subnode(ofnode node
)
153 assert(ofnode_valid(node
));
154 if (ofnode_is_np(node
))
155 return np_to_ofnode(node
.np
->child
);
157 return offset_to_ofnode(
158 fdt_first_subnode(gd
->fdt_blob
, ofnode_to_offset(node
)));
161 ofnode
ofnode_next_subnode(ofnode node
)
163 assert(ofnode_valid(node
));
164 if (ofnode_is_np(node
))
165 return np_to_ofnode(node
.np
->sibling
);
167 return offset_to_ofnode(
168 fdt_next_subnode(gd
->fdt_blob
, ofnode_to_offset(node
)));
171 const char *ofnode_get_name(ofnode node
)
173 assert(ofnode_valid(node
));
174 if (ofnode_is_np(node
))
175 return strrchr(node
.np
->full_name
, '/') + 1;
177 return fdt_get_name(gd
->fdt_blob
, ofnode_to_offset(node
), NULL
);
180 int ofnode_read_size(ofnode node
, const char *propname
)
184 if (ofnode_is_np(node
)) {
185 struct property
*prop
= of_find_property(
186 ofnode_to_np(node
), propname
, NULL
);
191 if (fdt_getprop(gd
->fdt_blob
, ofnode_to_offset(node
), propname
,
199 fdt_addr_t
ofnode_get_addr_index(ofnode node
, int index
)
201 if (ofnode_is_np(node
)) {
202 const __be32
*prop_val
;
206 prop_val
= of_get_address(
207 (struct device_node
*)ofnode_to_np(node
), index
,
210 return FDT_ADDR_T_NONE
;
211 return be32_to_cpup(prop_val
);
213 return fdt_get_base_address(gd
->fdt_blob
,
214 ofnode_to_offset(node
));
217 return FDT_ADDR_T_NONE
;
220 fdt_addr_t
ofnode_get_addr(ofnode node
)
222 return ofnode_get_addr_index(node
, 0);
225 int ofnode_stringlist_search(ofnode node
, const char *property
,
228 if (ofnode_is_np(node
)) {
229 return of_property_match_string(ofnode_to_np(node
),
234 ret
= fdt_stringlist_search(gd
->fdt_blob
,
235 ofnode_to_offset(node
), property
,
237 if (ret
== -FDT_ERR_NOTFOUND
)
246 int ofnode_read_string_index(ofnode node
, const char *property
, int index
,
249 if (ofnode_is_np(node
)) {
250 return of_property_read_string_index(ofnode_to_np(node
),
251 property
, index
, outp
);
255 *outp
= fdt_stringlist_get(gd
->fdt_blob
, ofnode_to_offset(node
),
256 property
, index
, &len
);
263 int ofnode_read_string_count(ofnode node
, const char *property
)
265 if (ofnode_is_np(node
)) {
266 return of_property_count_strings(ofnode_to_np(node
), property
);
268 return fdt_stringlist_count(gd
->fdt_blob
,
269 ofnode_to_offset(node
), property
);
273 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args
*in
,
274 struct ofnode_phandle_args
*out
)
276 assert(OF_MAX_PHANDLE_ARGS
== MAX_PHANDLE_ARGS
);
277 out
->node
= offset_to_ofnode(in
->node
);
278 out
->args_count
= in
->args_count
;
279 memcpy(out
->args
, in
->args
, sizeof(out
->args
));
282 static void ofnode_from_of_phandle_args(struct of_phandle_args
*in
,
283 struct ofnode_phandle_args
*out
)
285 assert(OF_MAX_PHANDLE_ARGS
== MAX_PHANDLE_ARGS
);
286 out
->node
= np_to_ofnode(in
->np
);
287 out
->args_count
= in
->args_count
;
288 memcpy(out
->args
, in
->args
, sizeof(out
->args
));
291 int ofnode_parse_phandle_with_args(ofnode node
, const char *list_name
,
292 const char *cells_name
, int cell_count
,
294 struct ofnode_phandle_args
*out_args
)
296 if (ofnode_is_np(node
)) {
297 struct of_phandle_args args
;
300 ret
= of_parse_phandle_with_args(ofnode_to_np(node
),
301 list_name
, cells_name
, index
, &args
);
304 ofnode_from_of_phandle_args(&args
, out_args
);
306 struct fdtdec_phandle_args args
;
309 ret
= fdtdec_parse_phandle_with_args(gd
->fdt_blob
,
310 ofnode_to_offset(node
), list_name
, cells_name
,
311 cell_count
, index
, &args
);
314 ofnode_from_fdtdec_phandle_args(&args
, out_args
);
320 ofnode
ofnode_path(const char *path
)
322 if (of_live_active())
323 return np_to_ofnode(of_find_node_by_path(path
));
325 return offset_to_ofnode(fdt_path_offset(gd
->fdt_blob
, path
));
328 const char *ofnode_get_chosen_prop(const char *name
)
332 chosen_node
= ofnode_path("/chosen");
334 return ofnode_read_string(chosen_node
, name
);
337 ofnode
ofnode_get_chosen_node(const char *name
)
341 prop
= ofnode_get_chosen_prop(name
);
343 return ofnode_null();
345 return ofnode_path(prop
);
348 static int decode_timing_property(ofnode node
, const char *name
,
349 struct timing_entry
*result
)
353 length
= ofnode_read_size(node
, name
);
355 debug("%s: could not find property %s\n",
356 ofnode_get_name(node
), name
);
360 if (length
== sizeof(u32
)) {
361 result
->typ
= ofnode_read_u32_default(node
, name
, 0);
362 result
->min
= result
->typ
;
363 result
->max
= result
->typ
;
365 ret
= ofnode_read_u32_array(node
, name
, &result
->min
, 3);
371 int ofnode_decode_display_timing(ofnode parent
, int index
,
372 struct display_timing
*dt
)
375 ofnode timings
, node
;
379 timings
= ofnode_find_subnode(parent
, "display-timings");
380 if (!ofnode_valid(timings
))
383 for (i
= 0, node
= ofnode_first_subnode(timings
);
384 ofnode_valid(node
) && i
!= index
;
385 node
= ofnode_first_subnode(node
))
388 if (!ofnode_valid(node
))
391 memset(dt
, 0, sizeof(*dt
));
393 ret
|= decode_timing_property(node
, "hback-porch", &dt
->hback_porch
);
394 ret
|= decode_timing_property(node
, "hfront-porch", &dt
->hfront_porch
);
395 ret
|= decode_timing_property(node
, "hactive", &dt
->hactive
);
396 ret
|= decode_timing_property(node
, "hsync-len", &dt
->hsync_len
);
397 ret
|= decode_timing_property(node
, "vback-porch", &dt
->vback_porch
);
398 ret
|= decode_timing_property(node
, "vfront-porch", &dt
->vfront_porch
);
399 ret
|= decode_timing_property(node
, "vactive", &dt
->vactive
);
400 ret
|= decode_timing_property(node
, "vsync-len", &dt
->vsync_len
);
401 ret
|= decode_timing_property(node
, "clock-frequency", &dt
->pixelclock
);
404 val
= ofnode_read_u32_default(node
, "vsync-active", -1);
406 dt
->flags
|= val
? DISPLAY_FLAGS_VSYNC_HIGH
:
407 DISPLAY_FLAGS_VSYNC_LOW
;
409 val
= ofnode_read_u32_default(node
, "hsync-active", -1);
411 dt
->flags
|= val
? DISPLAY_FLAGS_HSYNC_HIGH
:
412 DISPLAY_FLAGS_HSYNC_LOW
;
414 val
= ofnode_read_u32_default(node
, "de-active", -1);
416 dt
->flags
|= val
? DISPLAY_FLAGS_DE_HIGH
:
417 DISPLAY_FLAGS_DE_LOW
;
419 val
= ofnode_read_u32_default(node
, "pixelclk-active", -1);
421 dt
->flags
|= val
? DISPLAY_FLAGS_PIXDATA_POSEDGE
:
422 DISPLAY_FLAGS_PIXDATA_NEGEDGE
;
425 if (ofnode_read_bool(node
, "interlaced"))
426 dt
->flags
|= DISPLAY_FLAGS_INTERLACED
;
427 if (ofnode_read_bool(node
, "doublescan"))
428 dt
->flags
|= DISPLAY_FLAGS_DOUBLESCAN
;
429 if (ofnode_read_bool(node
, "doubleclk"))
430 dt
->flags
|= DISPLAY_FLAGS_DOUBLECLK
;
435 const u32
*ofnode_read_prop(ofnode node
, const char *propname
, int *lenp
)
437 if (ofnode_is_np(node
)) {
438 struct property
*prop
;
440 prop
= of_find_property(ofnode_to_np(node
), propname
, lenp
);
445 return fdt_getprop(gd
->fdt_blob
, ofnode_to_offset(node
),
450 bool ofnode_is_available(ofnode node
)
452 if (ofnode_is_np(node
))
453 return of_device_is_available(ofnode_to_np(node
));
455 return fdtdec_get_is_enabled(gd
->fdt_blob
,
456 ofnode_to_offset(node
));
459 fdt_addr_t
ofnode_get_addr_size(ofnode node
, const char *property
,
462 if (ofnode_is_np(node
)) {
465 const struct device_node
*np
= ofnode_to_np(node
);
466 const __be32
*prop
= of_get_property(np
, "reg", &psize
);
468 na
= of_n_addr_cells(np
);
469 ns
= of_n_addr_cells(np
);
470 *sizep
= of_read_number(prop
+ na
, ns
);
471 return of_read_number(prop
, na
);
473 return fdtdec_get_addr_size(gd
->fdt_blob
,
474 ofnode_to_offset(node
), property
,
479 const uint8_t *ofnode_read_u8_array_ptr(ofnode node
, const char *propname
,
482 if (ofnode_is_np(node
)) {
483 const struct device_node
*np
= ofnode_to_np(node
);
485 const __be32
*prop
= of_get_property(np
, propname
, &psize
);
487 if (!prop
|| sz
!= psize
)
489 return (uint8_t *)prop
;
492 return fdtdec_locate_byte_array(gd
->fdt_blob
,
493 ofnode_to_offset(node
), propname
, sz
);
497 int ofnode_read_pci_addr(ofnode node
, enum fdt_pci_space type
,
498 const char *propname
, struct fdt_pci_addr
*addr
)
504 debug("%s: %s: ", __func__
, propname
);
507 * If we follow the pci bus bindings strictly, we should check
508 * the value of the node's parent node's #address-cells and
509 * #size-cells. They need to be 3 and 2 accordingly. However,
510 * for simplicity we skip the check here.
512 cell
= ofnode_read_prop(node
, propname
, &len
);
516 if ((len
% FDT_PCI_REG_SIZE
) == 0) {
517 int num
= len
/ FDT_PCI_REG_SIZE
;
520 for (i
= 0; i
< num
; i
++) {
521 debug("pci address #%d: %08lx %08lx %08lx\n", i
,
522 (ulong
)fdt32_to_cpu(cell
[0]),
523 (ulong
)fdt32_to_cpu(cell
[1]),
524 (ulong
)fdt32_to_cpu(cell
[2]));
525 if ((fdt32_to_cpu(*cell
) & type
) == type
) {
526 addr
->phys_hi
= fdt32_to_cpu(cell
[0]);
527 addr
->phys_mid
= fdt32_to_cpu(cell
[1]);
528 addr
->phys_lo
= fdt32_to_cpu(cell
[1]);
531 cell
+= (FDT_PCI_ADDR_CELLS
+
547 debug("(not found)\n");
551 int ofnode_read_addr_cells(ofnode node
)
553 if (ofnode_is_np(node
))
554 return of_n_addr_cells(ofnode_to_np(node
));
556 return fdt_address_cells(gd
->fdt_blob
, ofnode_to_offset(node
));
559 int ofnode_read_size_cells(ofnode node
)
561 if (ofnode_is_np(node
))
562 return of_n_size_cells(ofnode_to_np(node
));
564 return fdt_size_cells(gd
->fdt_blob
, ofnode_to_offset(node
));
567 bool ofnode_pre_reloc(ofnode node
)
569 if (ofnode_read_prop(node
, "u-boot,dm-pre-reloc", NULL
))
572 #ifdef CONFIG_TPL_BUILD
573 if (ofnode_read_prop(node
, "u-boot,dm-tpl", NULL
))
575 #elif defined(CONFIG_SPL_BUILD)
576 if (ofnode_read_prop(node
, "u-boot,dm-spl", NULL
))
580 * In regular builds individual spl and tpl handling both
581 * count as handled pre-relocation for later second init.
583 if (ofnode_read_prop(node
, "u-boot,dm-spl", NULL
) ||
584 ofnode_read_prop(node
, "u-boot,dm-tpl", NULL
))