183d290c5STom Rini // SPDX-License-Identifier: GPL-2.0+
23863f840SCooper Jr., Franklin /*
33863f840SCooper Jr., Franklin * Copyright (C) 2016 Google, Inc
43863f840SCooper Jr., Franklin * Written by Simon Glass <sjg@chromium.org>
53863f840SCooper Jr., Franklin */
63863f840SCooper Jr., Franklin
73863f840SCooper Jr., Franklin #include <common.h>
83863f840SCooper Jr., Franklin #include <errno.h>
93863f840SCooper Jr., Franklin #include <image.h>
10b08c8c48SMasahiro Yamada #include <linux/libfdt.h>
113863f840SCooper Jr., Franklin
fdt_getprop_u32(const void * fdt,int node,const char * prop)123863f840SCooper Jr., Franklin ulong fdt_getprop_u32(const void *fdt, int node, const char *prop)
133863f840SCooper Jr., Franklin {
143863f840SCooper Jr., Franklin const u32 *cell;
153863f840SCooper Jr., Franklin int len;
163863f840SCooper Jr., Franklin
173863f840SCooper Jr., Franklin cell = fdt_getprop(fdt, node, prop, &len);
183863f840SCooper Jr., Franklin if (!cell || len != sizeof(*cell))
193863f840SCooper Jr., Franklin return FDT_ERROR;
203863f840SCooper Jr., Franklin
213863f840SCooper Jr., Franklin return fdt32_to_cpu(*cell);
223863f840SCooper Jr., Franklin }
233863f840SCooper Jr., Franklin
243863f840SCooper Jr., Franklin /*
253863f840SCooper Jr., Franklin * Iterate over all /configurations subnodes and call a platform specific
263863f840SCooper Jr., Franklin * function to find the matching configuration.
273863f840SCooper Jr., Franklin * Returns the node offset or a negative error number.
283863f840SCooper Jr., Franklin */
fit_find_config_node(const void * fdt)293863f840SCooper Jr., Franklin int fit_find_config_node(const void *fdt)
303863f840SCooper Jr., Franklin {
313863f840SCooper Jr., Franklin const char *name;
323863f840SCooper Jr., Franklin int conf, node, len;
3302035d00SJean-Jacques Hiblot const char *dflt_conf_name;
3402035d00SJean-Jacques Hiblot const char *dflt_conf_desc = NULL;
3502035d00SJean-Jacques Hiblot int dflt_conf_node = -ENOENT;
363863f840SCooper Jr., Franklin
373863f840SCooper Jr., Franklin conf = fdt_path_offset(fdt, FIT_CONFS_PATH);
383863f840SCooper Jr., Franklin if (conf < 0) {
393863f840SCooper Jr., Franklin debug("%s: Cannot find /configurations node: %d\n", __func__,
403863f840SCooper Jr., Franklin conf);
413863f840SCooper Jr., Franklin return -EINVAL;
423863f840SCooper Jr., Franklin }
4302035d00SJean-Jacques Hiblot
4402035d00SJean-Jacques Hiblot dflt_conf_name = fdt_getprop(fdt, conf, "default", &len);
4502035d00SJean-Jacques Hiblot
463863f840SCooper Jr., Franklin for (node = fdt_first_subnode(fdt, conf);
473863f840SCooper Jr., Franklin node >= 0;
483863f840SCooper Jr., Franklin node = fdt_next_subnode(fdt, node)) {
493863f840SCooper Jr., Franklin name = fdt_getprop(fdt, node, "description", &len);
503863f840SCooper Jr., Franklin if (!name) {
513863f840SCooper Jr., Franklin #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
523863f840SCooper Jr., Franklin printf("%s: Missing FDT description in DTB\n",
533863f840SCooper Jr., Franklin __func__);
543863f840SCooper Jr., Franklin #endif
553863f840SCooper Jr., Franklin return -EINVAL;
563863f840SCooper Jr., Franklin }
5702035d00SJean-Jacques Hiblot
5802035d00SJean-Jacques Hiblot if (dflt_conf_name) {
5902035d00SJean-Jacques Hiblot const char *node_name = fdt_get_name(fdt, node, NULL);
6002035d00SJean-Jacques Hiblot if (strcmp(dflt_conf_name, node_name) == 0) {
6102035d00SJean-Jacques Hiblot dflt_conf_node = node;
6202035d00SJean-Jacques Hiblot dflt_conf_desc = name;
6302035d00SJean-Jacques Hiblot }
6402035d00SJean-Jacques Hiblot }
6502035d00SJean-Jacques Hiblot
663863f840SCooper Jr., Franklin if (board_fit_config_name_match(name))
673863f840SCooper Jr., Franklin continue;
683863f840SCooper Jr., Franklin
693863f840SCooper Jr., Franklin debug("Selecting config '%s'", name);
703863f840SCooper Jr., Franklin
713863f840SCooper Jr., Franklin return node;
723863f840SCooper Jr., Franklin }
733863f840SCooper Jr., Franklin
7402035d00SJean-Jacques Hiblot if (dflt_conf_node != -ENOENT) {
75*6514bfc2SStefan Roese debug("Selecting default config '%s'\n", dflt_conf_desc);
7602035d00SJean-Jacques Hiblot return dflt_conf_node;
7702035d00SJean-Jacques Hiblot }
7802035d00SJean-Jacques Hiblot
793863f840SCooper Jr., Franklin return -ENOENT;
803863f840SCooper Jr., Franklin }
81