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 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in,
264 struct ofnode_phandle_args *out)
266 assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
267 out->node = offset_to_ofnode(in->node);
268 out->args_count = in->args_count;
269 memcpy(out->args, in->args, sizeof(out->args));
272 static void ofnode_from_of_phandle_args(struct of_phandle_args *in,
273 struct ofnode_phandle_args *out)
275 assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
276 out->node = np_to_ofnode(in->np);
277 out->args_count = in->args_count;
278 memcpy(out->args, in->args, sizeof(out->args));
281 int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
282 const char *cells_name, int cell_count,
284 struct ofnode_phandle_args *out_args)
286 if (ofnode_is_np(node)) {
287 struct of_phandle_args args;
290 ret = of_parse_phandle_with_args(ofnode_to_np(node),
291 list_name, cells_name, index, &args);
294 ofnode_from_of_phandle_args(&args, out_args);
296 struct fdtdec_phandle_args args;
299 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob,
300 ofnode_to_offset(node), list_name, cells_name,
301 cell_count, index, &args);
304 ofnode_from_fdtdec_phandle_args(&args, out_args);
310 ofnode ofnode_path(const char *path)
312 if (of_live_active())
313 return np_to_ofnode(of_find_node_by_path(path));
315 return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
318 const char *ofnode_get_chosen_prop(const char *name)
322 chosen_node = ofnode_path("/chosen");
324 return ofnode_read_string(chosen_node, name);
327 ofnode ofnode_get_chosen_node(const char *name)
331 prop = ofnode_get_chosen_prop(name);
333 return ofnode_null();
335 return ofnode_path(prop);
338 static int decode_timing_property(ofnode node, const char *name,
339 struct timing_entry *result)
343 length = ofnode_read_size(node, name);
345 debug("%s: could not find property %s\n",
346 ofnode_get_name(node), name);
350 if (length == sizeof(u32)) {
351 result->typ = ofnode_read_u32_default(node, name, 0);
352 result->min = result->typ;
353 result->max = result->typ;
355 ret = ofnode_read_u32_array(node, name, &result->min, 3);
361 int ofnode_decode_display_timing(ofnode parent, int index,
362 struct display_timing *dt)
365 ofnode timings, node;
369 timings = ofnode_find_subnode(parent, "display-timings");
370 if (!ofnode_valid(timings))
373 for (i = 0, node = ofnode_first_subnode(timings);
374 ofnode_valid(node) && i != index;
375 node = ofnode_first_subnode(node))
378 if (!ofnode_valid(node))
381 memset(dt, 0, sizeof(*dt));
383 ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
384 ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
385 ret |= decode_timing_property(node, "hactive", &dt->hactive);
386 ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
387 ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
388 ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
389 ret |= decode_timing_property(node, "vactive", &dt->vactive);
390 ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
391 ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
394 val = ofnode_read_u32_default(node, "vsync-active", -1);
396 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
397 DISPLAY_FLAGS_VSYNC_LOW;
399 val = ofnode_read_u32_default(node, "hsync-active", -1);
401 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
402 DISPLAY_FLAGS_HSYNC_LOW;
404 val = ofnode_read_u32_default(node, "de-active", -1);
406 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
407 DISPLAY_FLAGS_DE_LOW;
409 val = ofnode_read_u32_default(node, "pixelclk-active", -1);
411 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
412 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
415 if (ofnode_read_bool(node, "interlaced"))
416 dt->flags |= DISPLAY_FLAGS_INTERLACED;
417 if (ofnode_read_bool(node, "doublescan"))
418 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
419 if (ofnode_read_bool(node, "doubleclk"))
420 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
425 const u32 *ofnode_read_prop(ofnode node, const char *propname, int *lenp)
427 if (ofnode_is_np(node)) {
428 struct property *prop;
430 prop = of_find_property(ofnode_to_np(node), propname, lenp);
435 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 = fdt_read_number(prop + na, ns);
461 return fdt_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_read_prop(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));
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));
554 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
557 bool ofnode_pre_reloc(ofnode node)
559 if (ofnode_read_prop(node, "u-boot,dm-pre-reloc", NULL))
562 #ifdef CONFIG_TPL_BUILD
563 if (ofnode_read_prop(node, "u-boot,dm-tpl", NULL))
565 #elif defined(CONFIG_SPL_BUILD)
566 if (ofnode_read_prop(node, "u-boot,dm-spl", NULL))
570 * In regular builds individual spl and tpl handling both
571 * count as handled pre-relocation for later second init.
573 if (ofnode_read_prop(node, "u-boot,dm-spl", NULL) ||
574 ofnode_read_prop(node, "u-boot,dm-tpl", NULL))