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 int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
317 const char *cells_name)
319 if (ofnode_is_np(node))
320 return of_count_phandle_with_args(ofnode_to_np(node),
321 list_name, cells_name);
323 return fdtdec_parse_phandle_with_args(gd->fdt_blob,
324 ofnode_to_offset(node), list_name, cells_name,
328 ofnode ofnode_path(const char *path)
330 if (of_live_active())
331 return np_to_ofnode(of_find_node_by_path(path));
333 return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
336 const char *ofnode_get_chosen_prop(const char *name)
340 chosen_node = ofnode_path("/chosen");
342 return ofnode_read_string(chosen_node, name);
345 ofnode ofnode_get_chosen_node(const char *name)
349 prop = ofnode_get_chosen_prop(name);
351 return ofnode_null();
353 return ofnode_path(prop);
356 static int decode_timing_property(ofnode node, const char *name,
357 struct timing_entry *result)
361 length = ofnode_read_size(node, name);
363 debug("%s: could not find property %s\n",
364 ofnode_get_name(node), name);
368 if (length == sizeof(u32)) {
369 result->typ = ofnode_read_u32_default(node, name, 0);
370 result->min = result->typ;
371 result->max = result->typ;
373 ret = ofnode_read_u32_array(node, name, &result->min, 3);
379 int ofnode_decode_display_timing(ofnode parent, int index,
380 struct display_timing *dt)
383 ofnode timings, node;
387 timings = ofnode_find_subnode(parent, "display-timings");
388 if (!ofnode_valid(timings))
391 for (i = 0, node = ofnode_first_subnode(timings);
392 ofnode_valid(node) && i != index;
393 node = ofnode_first_subnode(node))
396 if (!ofnode_valid(node))
399 memset(dt, 0, sizeof(*dt));
401 ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
402 ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
403 ret |= decode_timing_property(node, "hactive", &dt->hactive);
404 ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
405 ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
406 ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
407 ret |= decode_timing_property(node, "vactive", &dt->vactive);
408 ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
409 ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
412 val = ofnode_read_u32_default(node, "vsync-active", -1);
414 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
415 DISPLAY_FLAGS_VSYNC_LOW;
417 val = ofnode_read_u32_default(node, "hsync-active", -1);
419 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
420 DISPLAY_FLAGS_HSYNC_LOW;
422 val = ofnode_read_u32_default(node, "de-active", -1);
424 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
425 DISPLAY_FLAGS_DE_LOW;
427 val = ofnode_read_u32_default(node, "pixelclk-active", -1);
429 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
430 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
433 if (ofnode_read_bool(node, "interlaced"))
434 dt->flags |= DISPLAY_FLAGS_INTERLACED;
435 if (ofnode_read_bool(node, "doublescan"))
436 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
437 if (ofnode_read_bool(node, "doubleclk"))
438 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
443 const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
445 if (ofnode_is_np(node))
446 return of_get_property(ofnode_to_np(node), propname, lenp);
448 return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
452 bool ofnode_is_available(ofnode node)
454 if (ofnode_is_np(node))
455 return of_device_is_available(ofnode_to_np(node));
457 return fdtdec_get_is_enabled(gd->fdt_blob,
458 ofnode_to_offset(node));
461 fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property,
464 if (ofnode_is_np(node)) {
467 const struct device_node *np = ofnode_to_np(node);
468 const __be32 *prop = of_get_property(np, "reg", &psize);
470 na = of_n_addr_cells(np);
471 ns = of_n_addr_cells(np);
472 *sizep = of_read_number(prop + na, ns);
473 return of_read_number(prop, na);
475 return fdtdec_get_addr_size(gd->fdt_blob,
476 ofnode_to_offset(node), property,
481 const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
484 if (ofnode_is_np(node)) {
485 const struct device_node *np = ofnode_to_np(node);
487 const __be32 *prop = of_get_property(np, propname, &psize);
489 if (!prop || sz != psize)
491 return (uint8_t *)prop;
494 return fdtdec_locate_byte_array(gd->fdt_blob,
495 ofnode_to_offset(node), propname, sz);
499 int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
500 const char *propname, struct fdt_pci_addr *addr)
506 debug("%s: %s: ", __func__, propname);
509 * If we follow the pci bus bindings strictly, we should check
510 * the value of the node's parent node's #address-cells and
511 * #size-cells. They need to be 3 and 2 accordingly. However,
512 * for simplicity we skip the check here.
514 cell = ofnode_get_property(node, propname, &len);
518 if ((len % FDT_PCI_REG_SIZE) == 0) {
519 int num = len / FDT_PCI_REG_SIZE;
522 for (i = 0; i < num; i++) {
523 debug("pci address #%d: %08lx %08lx %08lx\n", i,
524 (ulong)fdt32_to_cpu(cell[0]),
525 (ulong)fdt32_to_cpu(cell[1]),
526 (ulong)fdt32_to_cpu(cell[2]));
527 if ((fdt32_to_cpu(*cell) & type) == type) {
528 addr->phys_hi = fdt32_to_cpu(cell[0]);
529 addr->phys_mid = fdt32_to_cpu(cell[1]);
530 addr->phys_lo = fdt32_to_cpu(cell[1]);
533 cell += (FDT_PCI_ADDR_CELLS +
549 debug("(not found)\n");
553 int ofnode_read_addr_cells(ofnode node)
555 if (ofnode_is_np(node))
556 return of_n_addr_cells(ofnode_to_np(node));
557 else /* NOTE: this call should walk up the parent stack */
558 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
561 int ofnode_read_size_cells(ofnode node)
563 if (ofnode_is_np(node))
564 return of_n_size_cells(ofnode_to_np(node));
565 else /* NOTE: this call should walk up the parent stack */
566 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
569 int ofnode_read_simple_addr_cells(ofnode node)
571 if (ofnode_is_np(node))
572 return of_simple_addr_cells(ofnode_to_np(node));
574 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
577 int ofnode_read_simple_size_cells(ofnode node)
579 if (ofnode_is_np(node))
580 return of_simple_size_cells(ofnode_to_np(node));
582 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
585 bool ofnode_pre_reloc(ofnode node)
587 if (ofnode_read_bool(node, "u-boot,dm-pre-reloc"))
590 #ifdef CONFIG_TPL_BUILD
591 if (ofnode_read_bool(node, "u-boot,dm-tpl"))
593 #elif defined(CONFIG_SPL_BUILD)
594 if (ofnode_read_bool(node, "u-boot,dm-spl"))
598 * In regular builds individual spl and tpl handling both
599 * count as handled pre-relocation for later second init.
601 if (ofnode_read_bool(node, "u-boot,dm-spl") ||
602 ofnode_read_bool(node, "u-boot,dm-tpl"))