From 43db9e00d5837c100c0b2fbbee64a08ab807d1e0 Mon Sep 17 00:00:00 2001 From: thead_admin Date: Tue, 13 Sep 2022 11:04:33 +0800 Subject: Linux_SDK_V0.9.5 --- common/common_fit.c | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 common/common_fit.c (limited to 'common/common_fit.c') diff --git a/common/common_fit.c b/common/common_fit.c new file mode 100644 index 00000000..41305d8a --- /dev/null +++ b/common/common_fit.c @@ -0,0 +1,80 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2016 Google, Inc + * Written by Simon Glass + */ + +#include +#include +#include +#include + +ulong fdt_getprop_u32(const void *fdt, int node, const char *prop) +{ + const u32 *cell; + int len; + + cell = fdt_getprop(fdt, node, prop, &len); + if (!cell || len != sizeof(*cell)) + return FDT_ERROR; + + return fdt32_to_cpu(*cell); +} + +/* + * Iterate over all /configurations subnodes and call a platform specific + * function to find the matching configuration. + * Returns the node offset or a negative error number. + */ +int fit_find_config_node(const void *fdt) +{ + const char *name; + int conf, node, len; + const char *dflt_conf_name; + const char *dflt_conf_desc = NULL; + int dflt_conf_node = -ENOENT; + + conf = fdt_path_offset(fdt, FIT_CONFS_PATH); + if (conf < 0) { + debug("%s: Cannot find /configurations node: %d\n", __func__, + conf); + return -EINVAL; + } + + dflt_conf_name = fdt_getprop(fdt, conf, "default", &len); + + for (node = fdt_first_subnode(fdt, conf); + node >= 0; + node = fdt_next_subnode(fdt, node)) { + name = fdt_getprop(fdt, node, "description", &len); + if (!name) { +#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT + printf("%s: Missing FDT description in DTB\n", + __func__); +#endif + return -EINVAL; + } + + if (dflt_conf_name) { + const char *node_name = fdt_get_name(fdt, node, NULL); + if (strcmp(dflt_conf_name, node_name) == 0) { + dflt_conf_node = node; + dflt_conf_desc = name; + } + } + + if (board_fit_config_name_match(name)) + continue; + + debug("Selecting config '%s'", name); + + return node; + } + + if (dflt_conf_node != -ENOENT) { + debug("Selecting default config '%s'\n", dflt_conf_desc); + return dflt_conf_node; + } + + return -ENOENT; +} -- cgit v1.2.3