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 prop = ofnode_get_property(node, propname, NULL);
67 debug("%s\n", prop ? "true" : "false");
69 return prop ? true : false;
72 const char *ofnode_read_string(ofnode node, const char *propname)
74 const char *str = NULL;
77 assert(ofnode_valid(node));
78 debug("%s: %s: ", __func__, propname);
80 if (ofnode_is_np(node)) {
81 struct property *prop = of_find_property(
82 ofnode_to_np(node), propname, NULL);
89 str = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
93 debug("<not found>\n");
96 if (strnlen(str, len) >= len) {
105 ofnode ofnode_find_subnode(ofnode node, const char *subnode_name)
109 assert(ofnode_valid(node));
110 debug("%s: %s: ", __func__, subnode_name);
112 if (ofnode_is_np(node)) {
113 const struct device_node *np = ofnode_to_np(node);
115 for (np = np->child; np; np = np->sibling) {
116 if (!strcmp(subnode_name, np->name))
119 subnode = np_to_ofnode(np);
121 int ooffset = fdt_subnode_offset(gd->fdt_blob,
122 ofnode_to_offset(node), subnode_name);
123 subnode = offset_to_ofnode(ooffset);
125 debug("%s\n", ofnode_valid(subnode) ?
126 ofnode_get_name(subnode) : "<none>");
131 int ofnode_read_u32_array(ofnode node, const char *propname,
132 u32 *out_values, size_t sz)
134 assert(ofnode_valid(node));
135 debug("%s: %s: ", __func__, propname);
137 if (ofnode_is_np(node)) {
138 return of_read_u32_array(ofnode_to_np(node), propname,
141 return fdtdec_get_int_array(gd->fdt_blob,
142 ofnode_to_offset(node), propname,
147 ofnode ofnode_first_subnode(ofnode node)
149 assert(ofnode_valid(node));
150 if (ofnode_is_np(node))
151 return np_to_ofnode(node.np->child);
153 return offset_to_ofnode(
154 fdt_first_subnode(gd->fdt_blob, ofnode_to_offset(node)));
157 ofnode ofnode_next_subnode(ofnode node)
159 assert(ofnode_valid(node));
160 if (ofnode_is_np(node))
161 return np_to_ofnode(node.np->sibling);
163 return offset_to_ofnode(
164 fdt_next_subnode(gd->fdt_blob, ofnode_to_offset(node)));
167 const char *ofnode_get_name(ofnode node)
169 assert(ofnode_valid(node));
170 if (ofnode_is_np(node))
171 return strrchr(node.np->full_name, '/') + 1;
173 return fdt_get_name(gd->fdt_blob, ofnode_to_offset(node), NULL);
176 int ofnode_read_size(ofnode node, const char *propname)
180 if (ofnode_is_np(node)) {
181 struct property *prop = of_find_property(
182 ofnode_to_np(node), propname, NULL);
187 if (fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
195 fdt_addr_t ofnode_get_addr_index(ofnode node, int index)
197 if (ofnode_is_np(node)) {
198 const __be32 *prop_val;
202 prop_val = of_get_address(
203 (struct device_node *)ofnode_to_np(node), index,
206 return FDT_ADDR_T_NONE;
207 return be32_to_cpup(prop_val);
209 return fdt_get_base_address(gd->fdt_blob,
210 ofnode_to_offset(node));
213 return FDT_ADDR_T_NONE;
216 fdt_addr_t ofnode_get_addr(ofnode node)
218 return ofnode_get_addr_index(node, 0);
221 int ofnode_stringlist_search(ofnode node, const char *property,
224 if (ofnode_is_np(node)) {
225 return of_property_match_string(ofnode_to_np(node),
230 ret = fdt_stringlist_search(gd->fdt_blob,
231 ofnode_to_offset(node), property,
233 if (ret == -FDT_ERR_NOTFOUND)
242 int ofnode_read_string_index(ofnode node, const char *property, int index,
245 if (ofnode_is_np(node)) {
246 return of_property_read_string_index(ofnode_to_np(node),
247 property, index, outp);
251 *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node),
252 property, index, &len);
259 int ofnode_read_string_count(ofnode node, const char *property)
261 if (ofnode_is_np(node)) {
262 return of_property_count_strings(ofnode_to_np(node), property);
264 return fdt_stringlist_count(gd->fdt_blob,
265 ofnode_to_offset(node), property);
269 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in,
270 struct ofnode_phandle_args *out)
272 assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
273 out->node = offset_to_ofnode(in->node);
274 out->args_count = in->args_count;
275 memcpy(out->args, in->args, sizeof(out->args));
278 static void ofnode_from_of_phandle_args(struct of_phandle_args *in,
279 struct ofnode_phandle_args *out)
281 assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
282 out->node = np_to_ofnode(in->np);
283 out->args_count = in->args_count;
284 memcpy(out->args, in->args, sizeof(out->args));
287 int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
288 const char *cells_name, int cell_count,
290 struct ofnode_phandle_args *out_args)
292 if (ofnode_is_np(node)) {
293 struct of_phandle_args args;
296 ret = of_parse_phandle_with_args(ofnode_to_np(node),
297 list_name, cells_name, index, &args);
300 ofnode_from_of_phandle_args(&args, out_args);
302 struct fdtdec_phandle_args args;
305 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob,
306 ofnode_to_offset(node), list_name, cells_name,
307 cell_count, index, &args);
310 ofnode_from_fdtdec_phandle_args(&args, out_args);
316 ofnode ofnode_path(const char *path)
318 if (of_live_active())
319 return np_to_ofnode(of_find_node_by_path(path));
321 return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
324 const char *ofnode_get_chosen_prop(const char *name)
328 chosen_node = ofnode_path("/chosen");
330 return ofnode_read_string(chosen_node, name);
333 ofnode ofnode_get_chosen_node(const char *name)
337 prop = ofnode_get_chosen_prop(name);
339 return ofnode_null();
341 return ofnode_path(prop);
344 static int decode_timing_property(ofnode node, const char *name,
345 struct timing_entry *result)
349 length = ofnode_read_size(node, name);
351 debug("%s: could not find property %s\n",
352 ofnode_get_name(node), name);
356 if (length == sizeof(u32)) {
357 result->typ = ofnode_read_u32_default(node, name, 0);
358 result->min = result->typ;
359 result->max = result->typ;
361 ret = ofnode_read_u32_array(node, name, &result->min, 3);
367 int ofnode_decode_display_timing(ofnode parent, int index,
368 struct display_timing *dt)
371 ofnode timings, node;
375 timings = ofnode_find_subnode(parent, "display-timings");
376 if (!ofnode_valid(timings))
379 for (i = 0, node = ofnode_first_subnode(timings);
380 ofnode_valid(node) && i != index;
381 node = ofnode_first_subnode(node))
384 if (!ofnode_valid(node))
387 memset(dt, 0, sizeof(*dt));
389 ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
390 ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
391 ret |= decode_timing_property(node, "hactive", &dt->hactive);
392 ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
393 ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
394 ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
395 ret |= decode_timing_property(node, "vactive", &dt->vactive);
396 ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
397 ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
400 val = ofnode_read_u32_default(node, "vsync-active", -1);
402 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
403 DISPLAY_FLAGS_VSYNC_LOW;
405 val = ofnode_read_u32_default(node, "hsync-active", -1);
407 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
408 DISPLAY_FLAGS_HSYNC_LOW;
410 val = ofnode_read_u32_default(node, "de-active", -1);
412 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
413 DISPLAY_FLAGS_DE_LOW;
415 val = ofnode_read_u32_default(node, "pixelclk-active", -1);
417 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
418 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
421 if (ofnode_read_bool(node, "interlaced"))
422 dt->flags |= DISPLAY_FLAGS_INTERLACED;
423 if (ofnode_read_bool(node, "doublescan"))
424 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
425 if (ofnode_read_bool(node, "doubleclk"))
426 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
431 const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
433 if (ofnode_is_np(node))
434 return of_get_property(ofnode_to_np(node), propname, lenp);
436 return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
440 bool ofnode_is_available(ofnode node)
442 if (ofnode_is_np(node))
443 return of_device_is_available(ofnode_to_np(node));
445 return fdtdec_get_is_enabled(gd->fdt_blob,
446 ofnode_to_offset(node));
449 fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property,
452 if (ofnode_is_np(node)) {
455 const struct device_node *np = ofnode_to_np(node);
456 const __be32 *prop = of_get_property(np, "reg", &psize);
458 na = of_n_addr_cells(np);
459 ns = of_n_addr_cells(np);
460 *sizep = of_read_number(prop + na, ns);
461 return of_read_number(prop, na);
463 return fdtdec_get_addr_size(gd->fdt_blob,
464 ofnode_to_offset(node), property,
469 const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
472 if (ofnode_is_np(node)) {
473 const struct device_node *np = ofnode_to_np(node);
475 const __be32 *prop = of_get_property(np, propname, &psize);
477 if (!prop || sz != psize)
479 return (uint8_t *)prop;
482 return fdtdec_locate_byte_array(gd->fdt_blob,
483 ofnode_to_offset(node), propname, sz);
487 int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
488 const char *propname, struct fdt_pci_addr *addr)
494 debug("%s: %s: ", __func__, propname);
497 * If we follow the pci bus bindings strictly, we should check
498 * the value of the node's parent node's #address-cells and
499 * #size-cells. They need to be 3 and 2 accordingly. However,
500 * for simplicity we skip the check here.
502 cell = ofnode_get_property(node, propname, &len);
506 if ((len % FDT_PCI_REG_SIZE) == 0) {
507 int num = len / FDT_PCI_REG_SIZE;
510 for (i = 0; i < num; i++) {
511 debug("pci address #%d: %08lx %08lx %08lx\n", i,
512 (ulong)fdt32_to_cpu(cell[0]),
513 (ulong)fdt32_to_cpu(cell[1]),
514 (ulong)fdt32_to_cpu(cell[2]));
515 if ((fdt32_to_cpu(*cell) & type) == type) {
516 addr->phys_hi = fdt32_to_cpu(cell[0]);
517 addr->phys_mid = fdt32_to_cpu(cell[1]);
518 addr->phys_lo = fdt32_to_cpu(cell[1]);
521 cell += (FDT_PCI_ADDR_CELLS +
537 debug("(not found)\n");
541 int ofnode_read_addr_cells(ofnode node)
543 if (ofnode_is_np(node))
544 return of_n_addr_cells(ofnode_to_np(node));
545 else /* NOTE: this call should walk up the parent stack */
546 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
549 int ofnode_read_size_cells(ofnode node)
551 if (ofnode_is_np(node))
552 return of_n_size_cells(ofnode_to_np(node));
553 else /* NOTE: this call should walk up the parent stack */
554 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
557 int ofnode_read_simple_addr_cells(ofnode node)
559 if (ofnode_is_np(node))
560 return of_simple_addr_cells(ofnode_to_np(node));
562 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
565 int ofnode_read_simple_size_cells(ofnode node)
567 if (ofnode_is_np(node))
568 return of_simple_size_cells(ofnode_to_np(node));
570 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
573 bool ofnode_pre_reloc(ofnode node)
575 if (ofnode_read_bool(node, "u-boot,dm-pre-reloc"))
578 #ifdef CONFIG_TPL_BUILD
579 if (ofnode_read_bool(node, "u-boot,dm-tpl"))
581 #elif defined(CONFIG_SPL_BUILD)
582 if (ofnode_read_bool(node, "u-boot,dm-spl"))
586 * In regular builds individual spl and tpl handling both
587 * count as handled pre-relocation for later second init.
589 if (ofnode_read_bool(node, "u-boot,dm-spl") ||
590 ofnode_read_bool(node, "u-boot,dm-tpl"))