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path: root/drivers/core/ofnode.c
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-rw-r--r--drivers/core/ofnode.c1939
1 files changed, 1939 insertions, 0 deletions
diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c
new file mode 100644
index 00000000000..9a5eaaa4d13
--- /dev/null
+++ b/drivers/core/ofnode.c
@@ -0,0 +1,1939 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2017 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ */
+
+#define LOG_CATEGORY LOGC_DT
+
+#include <dm.h>
+#include <fdtdec.h>
+#include <fdt_support.h>
+#include <log.h>
+#include <malloc.h>
+#include <of_live.h>
+#include <linux/libfdt.h>
+#include <dm/of_access.h>
+#include <dm/of_addr.h>
+#include <dm/ofnode.h>
+#include <linux/err.h>
+#include <linux/ioport.h>
+#include <asm/global_data.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if CONFIG_IS_ENABLED(OFNODE_MULTI_TREE)
+static void *oftree_list[CONFIG_OFNODE_MULTI_TREE_MAX];
+static int oftree_count;
+
+void oftree_reset(void)
+{
+ if (gd->flags & GD_FLG_RELOC) {
+ oftree_count = 0;
+ oftree_list[oftree_count++] = (void *)gd->fdt_blob;
+ }
+}
+
+static int oftree_find(const void *fdt)
+{
+ int i;
+
+ for (i = 0; i < oftree_count; i++) {
+ if (fdt == oftree_list[i])
+ return i;
+ }
+
+ return -1;
+}
+
+static int check_tree_count(void)
+{
+ if (oftree_count == CONFIG_OFNODE_MULTI_TREE_MAX) {
+ log_warning("Too many registered device trees (max %d)\n",
+ CONFIG_OFNODE_MULTI_TREE_MAX);
+ return -E2BIG;
+ }
+
+ return 0;
+}
+
+static oftree oftree_ensure(void *fdt)
+{
+ oftree tree;
+ int i;
+
+ if (of_live_active()) {
+ struct device_node *root;
+ int ret;
+
+ ret = unflatten_device_tree(fdt, &root);
+ if (ret) {
+ log_err("Failed to create live tree: err=%d\n", ret);
+ return oftree_null();
+ }
+ tree = oftree_from_np(root);
+
+ return tree;
+ }
+
+ if (gd->flags & GD_FLG_RELOC) {
+ i = oftree_find(fdt);
+ if (i == -1) {
+ if (check_tree_count())
+ return oftree_null();
+
+ if (fdt_check_header(fdt)) {
+ log_err("Invalid device tree blob header\n");
+ return oftree_null();
+ }
+
+ /* register the new tree */
+ i = oftree_count++;
+ oftree_list[i] = fdt;
+ log_debug("oftree: registered tree %d: %p\n", i, fdt);
+ }
+ } else {
+ if (fdt != gd->fdt_blob) {
+ log_debug("Only the control FDT can be accessed before relocation\n");
+ return oftree_null();
+ }
+ }
+
+ tree.fdt = fdt;
+
+ return tree;
+}
+
+int oftree_new(oftree *treep)
+{
+ oftree tree = oftree_null();
+ int ret;
+
+ if (of_live_active()) {
+ struct device_node *root;
+
+ ret = of_live_create_empty(&root);
+ if (ret)
+ return log_msg_ret("liv", ret);
+ tree = oftree_from_np(root);
+ } else {
+ const int size = 1024;
+ void *fdt;
+
+ ret = check_tree_count();
+ if (ret)
+ return log_msg_ret("fla", ret);
+
+ /* register the new tree with a small size */
+ fdt = malloc(size);
+ if (!fdt)
+ return log_msg_ret("fla", -ENOMEM);
+ ret = fdt_create_empty_tree(fdt, size);
+ if (ret)
+ return log_msg_ret("fla", -EINVAL);
+ oftree_list[oftree_count++] = fdt;
+ tree.fdt = fdt;
+ }
+ *treep = tree;
+
+ return 0;
+}
+
+void oftree_dispose(oftree tree)
+{
+ if (of_live_active())
+ of_live_free(tree.np);
+}
+
+void *ofnode_lookup_fdt(ofnode node)
+{
+ if (gd->flags & GD_FLG_RELOC) {
+ uint i = OFTREE_TREE_ID(node.of_offset);
+
+ if (i >= oftree_count) {
+ log_debug("Invalid tree ID %x\n", i);
+ return NULL;
+ }
+
+ return oftree_list[i];
+ } else {
+ return (void *)gd->fdt_blob;
+ }
+}
+
+void *ofnode_to_fdt(ofnode node)
+{
+#ifdef OF_CHECKS
+ if (of_live_active())
+ return NULL;
+#endif
+ if (CONFIG_IS_ENABLED(OFNODE_MULTI_TREE) && ofnode_valid(node))
+ return ofnode_lookup_fdt(node);
+
+ /* Use the control FDT by default */
+ return (void *)gd->fdt_blob;
+}
+
+/**
+ * ofnode_to_offset() - convert an ofnode to a flat DT offset
+ *
+ * This cannot be called if the reference contains a node pointer.
+ *
+ * @node: Reference containing offset (possibly invalid)
+ * Return: DT offset (can be -1)
+ */
+int ofnode_to_offset(ofnode node)
+{
+#ifdef OF_CHECKS
+ if (of_live_active())
+ return -1;
+#endif
+ if (CONFIG_IS_ENABLED(OFNODE_MULTI_TREE) && node.of_offset >= 0)
+ return OFTREE_OFFSET(node.of_offset);
+
+ return node.of_offset;
+}
+
+oftree oftree_from_fdt(void *fdt)
+{
+ oftree tree;
+
+ if (CONFIG_IS_ENABLED(OFNODE_MULTI_TREE))
+ return oftree_ensure(fdt);
+
+#ifdef OF_CHECKS
+ if (of_live_active())
+ return oftree_null();
+#endif
+ tree.fdt = fdt;
+
+ return tree;
+}
+
+/**
+ * noffset_to_ofnode() - convert a DT offset to an ofnode
+ *
+ * @other_node: Node in the same tree to use as a reference
+ * @of_offset: DT offset (either valid, or -1)
+ * Return: reference to the associated DT offset
+ */
+ofnode noffset_to_ofnode(ofnode other_node, int of_offset)
+{
+ ofnode node;
+
+ if (of_live_active())
+ node.np = NULL;
+ else if (!CONFIG_IS_ENABLED(OFNODE_MULTI_TREE) || of_offset < 0 ||
+ !ofnode_valid(other_node))
+ node.of_offset = of_offset;
+ else
+ node.of_offset = OFTREE_MAKE_NODE(other_node.of_offset,
+ of_offset);
+
+ return node;
+}
+
+#else /* !OFNODE_MULTI_TREE */
+
+static inline int oftree_find(const void *fdt)
+{
+ return 0;
+}
+
+int oftree_new(oftree *treep)
+{
+ return -ENOSYS;
+}
+
+#endif /* OFNODE_MULTI_TREE */
+
+int oftree_to_fdt(oftree tree, struct abuf *buf)
+{
+ int ret;
+
+ if (of_live_active()) {
+ ret = of_live_flatten(ofnode_to_np(oftree_root(tree)), buf);
+ if (ret)
+ return log_msg_ret("flt", ret);
+ } else {
+ void *fdt = oftree_lookup_fdt(tree);
+
+ abuf_init(buf);
+ abuf_set(buf, fdt, fdt_totalsize(fdt));
+ }
+
+ return 0;
+}
+
+/**
+ * ofnode_from_tree_offset() - get an ofnode from a tree offset (flat tree)
+ *
+ * Looks up the tree and returns an ofnode with the correct of_offset (i.e.
+ * containing the tree ID).
+ *
+ * If @offset is < 0 then this returns an ofnode with that offset and no tree
+ * ID.
+ *
+ * @tree: tree to check
+ * @offset: offset within that tree (can be < 0)
+ * @return node for that offset, with the correct ID
+ */
+static ofnode ofnode_from_tree_offset(oftree tree, int offset)
+{
+ ofnode node;
+
+ if (CONFIG_IS_ENABLED(OFNODE_MULTI_TREE) && offset >= 0) {
+ int tree_id = oftree_find(tree.fdt);
+
+ if (tree_id == -1)
+ return ofnode_null();
+ node.of_offset = OFTREE_NODE(tree_id, offset);
+ } else {
+ node.of_offset = offset;
+ }
+
+ return node;
+}
+
+bool ofnode_name_eq(ofnode node, const char *name)
+{
+ const char *node_name;
+ size_t len;
+
+ assert(ofnode_valid(node));
+
+ node_name = ofnode_get_name(node);
+ len = strchrnul(node_name, '@') - node_name;
+
+ return (strlen(name) == len) && !strncmp(node_name, name, len);
+}
+
+int ofnode_read_u8(ofnode node, const char *propname, u8 *outp)
+{
+ const u8 *cell;
+ int len;
+
+ assert(ofnode_valid(node));
+ debug("%s: %s: ", __func__, propname);
+
+ if (ofnode_is_np(node))
+ return of_read_u8(ofnode_to_np(node), propname, outp);
+
+ cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
+ &len);
+ if (!cell || len < sizeof(*cell)) {
+ debug("(not found)\n");
+ return -EINVAL;
+ }
+ *outp = *cell;
+ debug("%#x (%d)\n", *outp, *outp);
+
+ return 0;
+}
+
+u8 ofnode_read_u8_default(ofnode node, const char *propname, u8 def)
+{
+ assert(ofnode_valid(node));
+ ofnode_read_u8(node, propname, &def);
+
+ return def;
+}
+
+int ofnode_read_u16(ofnode node, const char *propname, u16 *outp)
+{
+ const fdt16_t *cell;
+ int len;
+
+ assert(ofnode_valid(node));
+ debug("%s: %s: ", __func__, propname);
+
+ if (ofnode_is_np(node))
+ return of_read_u16(ofnode_to_np(node), propname, outp);
+
+ cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
+ &len);
+ if (!cell || len < sizeof(*cell)) {
+ debug("(not found)\n");
+ return -EINVAL;
+ }
+ *outp = be16_to_cpup(cell);
+ debug("%#x (%d)\n", *outp, *outp);
+
+ return 0;
+}
+
+u16 ofnode_read_u16_default(ofnode node, const char *propname, u16 def)
+{
+ assert(ofnode_valid(node));
+ ofnode_read_u16(node, propname, &def);
+
+ return def;
+}
+
+int ofnode_read_u32(ofnode node, const char *propname, u32 *outp)
+{
+ return ofnode_read_u32_index(node, propname, 0, outp);
+}
+
+u32 ofnode_read_u32_default(ofnode node, const char *propname, u32 def)
+{
+ assert(ofnode_valid(node));
+ ofnode_read_u32_index(node, propname, 0, &def);
+
+ return def;
+}
+
+int ofnode_read_u32_index(ofnode node, const char *propname, int index,
+ u32 *outp)
+{
+ const fdt32_t *cell;
+ int len;
+
+ assert(ofnode_valid(node));
+ debug("%s: %s: ", __func__, propname);
+
+ if (ofnode_is_np(node))
+ return of_read_u32_index(ofnode_to_np(node), propname, index,
+ outp);
+
+ cell = fdt_getprop(ofnode_to_fdt(node), ofnode_to_offset(node),
+ propname, &len);
+ if (!cell) {
+ debug("(not found)\n");
+ return -EINVAL;
+ }
+
+ if (len < (sizeof(int) * (index + 1))) {
+ debug("(not large enough)\n");
+ return -EOVERFLOW;
+ }
+
+ *outp = fdt32_to_cpu(cell[index]);
+ debug("%#x (%d)\n", *outp, *outp);
+
+ return 0;
+}
+
+int ofnode_read_u64_index(ofnode node, const char *propname, int index,
+ u64 *outp)
+{
+ const fdt64_t *cell;
+ int len;
+
+ assert(ofnode_valid(node));
+
+ if (ofnode_is_np(node))
+ return of_read_u64_index(ofnode_to_np(node), propname, index,
+ outp);
+
+ cell = fdt_getprop(ofnode_to_fdt(node), ofnode_to_offset(node),
+ propname, &len);
+ if (!cell) {
+ debug("(not found)\n");
+ return -EINVAL;
+ }
+
+ if (len < (sizeof(u64) * (index + 1))) {
+ debug("(not large enough)\n");
+ return -EOVERFLOW;
+ }
+
+ *outp = fdt64_to_cpu(cell[index]);
+ debug("%#llx (%lld)\n", *outp, *outp);
+
+ return 0;
+}
+
+u32 ofnode_read_u32_index_default(ofnode node, const char *propname, int index,
+ u32 def)
+{
+ assert(ofnode_valid(node));
+ ofnode_read_u32_index(node, propname, index, &def);
+
+ return def;
+}
+
+int ofnode_read_s32_default(ofnode node, const char *propname, s32 def)
+{
+ assert(ofnode_valid(node));
+ ofnode_read_u32(node, propname, (u32 *)&def);
+
+ return def;
+}
+
+int ofnode_read_u64(ofnode node, const char *propname, u64 *outp)
+{
+ const unaligned_fdt64_t *cell;
+ int len;
+
+ assert(ofnode_valid(node));
+ debug("%s: %s: ", __func__, propname);
+
+ if (ofnode_is_np(node))
+ return of_read_u64(ofnode_to_np(node), propname, outp);
+
+ cell = fdt_getprop(ofnode_to_fdt(node), ofnode_to_offset(node),
+ propname, &len);
+ if (!cell || len < sizeof(*cell)) {
+ debug("(not found)\n");
+ return -EINVAL;
+ }
+ *outp = fdt64_to_cpu(cell[0]);
+ debug("%#llx (%lld)\n", (unsigned long long)*outp,
+ (unsigned long long)*outp);
+
+ return 0;
+}
+
+u64 ofnode_read_u64_default(ofnode node, const char *propname, u64 def)
+{
+ assert(ofnode_valid(node));
+ ofnode_read_u64(node, propname, &def);
+
+ return def;
+}
+
+bool ofnode_read_bool(ofnode node, const char *propname)
+{
+ bool prop;
+
+ assert(ofnode_valid(node));
+ debug("%s: %s: ", __func__, propname);
+
+ prop = ofnode_has_property(node, propname);
+
+ debug("%s\n", prop ? "true" : "false");
+
+ return prop ? true : false;
+}
+
+const void *ofnode_read_prop(ofnode node, const char *propname, int *sizep)
+{
+ const char *val = NULL;
+ int len;
+
+ assert(ofnode_valid(node));
+ debug("%s: %s: ", __func__, propname);
+
+ if (ofnode_is_np(node)) {
+ struct property *prop = of_find_property(
+ ofnode_to_np(node), propname, &len);
+
+ if (prop) {
+ val = prop->value;
+ len = prop->length;
+ }
+ } else {
+ val = fdt_getprop(ofnode_to_fdt(node), ofnode_to_offset(node),
+ propname, &len);
+ }
+ if (!val) {
+ debug("<not found>\n");
+ if (sizep)
+ *sizep = -FDT_ERR_NOTFOUND;
+ return NULL;
+ }
+ if (sizep)
+ *sizep = len;
+
+ return val;
+}
+
+const char *ofnode_read_string(ofnode node, const char *propname)
+{
+ const char *str;
+ int len;
+
+ str = ofnode_read_prop(node, propname, &len);
+ if (!str)
+ return NULL;
+
+ if (strnlen(str, len) >= len) {
+ debug("<invalid>\n");
+ return NULL;
+ }
+ debug("%s\n", str);
+
+ return str;
+}
+
+int ofnode_read_size(ofnode node, const char *propname)
+{
+ int len;
+
+ if (!ofnode_read_prop(node, propname, &len))
+ return -EINVAL;
+
+ return len;
+}
+
+ofnode ofnode_find_subnode(ofnode node, const char *subnode_name)
+{
+ ofnode subnode;
+
+ assert(ofnode_valid(node));
+ debug("%s: %s: ", __func__, subnode_name);
+
+ if (ofnode_is_np(node)) {
+ struct device_node *np = ofnode_to_np(node);
+
+ for (np = np->child; np; np = np->sibling) {
+ if (!strcmp(subnode_name, np->name))
+ break;
+ }
+ subnode = np_to_ofnode(np);
+ } else {
+ int ooffset = fdt_subnode_offset(ofnode_to_fdt(node),
+ ofnode_to_offset(node), subnode_name);
+ subnode = noffset_to_ofnode(node, ooffset);
+ }
+ debug("%s\n", ofnode_valid(subnode) ?
+ ofnode_get_name(subnode) : "<none>");
+
+ return subnode;
+}
+
+int ofnode_read_u32_array(ofnode node, const char *propname,
+ u32 *out_values, size_t sz)
+{
+ assert(ofnode_valid(node));
+ debug("%s: %s: ", __func__, propname);
+
+ if (ofnode_is_np(node)) {
+ return of_read_u32_array(ofnode_to_np(node), propname,
+ out_values, sz);
+ } else {
+ int ret;
+
+ ret = fdtdec_get_int_array(ofnode_to_fdt(node),
+ ofnode_to_offset(node), propname,
+ out_values, sz);
+
+ /* get the error right, but space is more important in SPL */
+ if (!IS_ENABLED(CONFIG_SPL_BUILD)) {
+ if (ret == -FDT_ERR_NOTFOUND)
+ return -EINVAL;
+ else if (ret == -FDT_ERR_BADLAYOUT)
+ return -EOVERFLOW;
+ }
+ return ret;
+ }
+}
+
+#if !CONFIG_IS_ENABLED(DM_INLINE_OFNODE)
+bool ofnode_is_enabled(ofnode node)
+{
+ if (ofnode_is_np(node)) {
+ return of_device_is_available(ofnode_to_np(node));
+ } else {
+ return fdtdec_get_is_enabled(ofnode_to_fdt(node),
+ ofnode_to_offset(node));
+ }
+}
+
+ofnode ofnode_first_subnode(ofnode node)
+{
+ assert(ofnode_valid(node));
+ if (ofnode_is_np(node))
+ return np_to_ofnode(node.np->child);
+
+ return noffset_to_ofnode(node,
+ fdt_first_subnode(ofnode_to_fdt(node), ofnode_to_offset(node)));
+}
+
+ofnode ofnode_next_subnode(ofnode node)
+{
+ assert(ofnode_valid(node));
+ if (ofnode_is_np(node))
+ return np_to_ofnode(node.np->sibling);
+
+ return noffset_to_ofnode(node,
+ fdt_next_subnode(ofnode_to_fdt(node), ofnode_to_offset(node)));
+}
+#endif /* !DM_INLINE_OFNODE */
+
+ofnode ofnode_get_parent(ofnode node)
+{
+ ofnode parent;
+
+ assert(ofnode_valid(node));
+ if (ofnode_is_np(node))
+ parent = np_to_ofnode(of_get_parent(ofnode_to_np(node)));
+ else
+ parent.of_offset = fdt_parent_offset(ofnode_to_fdt(node),
+ ofnode_to_offset(node));
+
+ return parent;
+}
+
+const char *ofnode_get_name(ofnode node)
+{
+ if (!ofnode_valid(node)) {
+ debug("%s node not valid\n", __func__);
+ return NULL;
+ }
+
+ if (ofnode_is_np(node))
+ return node.np->name;
+
+ return fdt_get_name(ofnode_to_fdt(node), ofnode_to_offset(node), NULL);
+}
+
+int ofnode_get_path(ofnode node, char *buf, int buflen)
+{
+ assert(ofnode_valid(node));
+
+ if (ofnode_is_np(node)) {
+ if (strlen(node.np->full_name) >= buflen)
+ return -ENOSPC;
+
+ strcpy(buf, node.np->full_name);
+
+ return 0;
+ } else {
+ int res;
+
+ res = fdt_get_path(ofnode_to_fdt(node), ofnode_to_offset(node), buf,
+ buflen);
+ if (!res)
+ return res;
+ else if (res == -FDT_ERR_NOSPACE)
+ return -ENOSPC;
+ else
+ return -EINVAL;
+ }
+}
+
+ofnode ofnode_get_by_phandle(uint phandle)
+{
+ ofnode node;
+
+ if (of_live_active())
+ node = np_to_ofnode(of_find_node_by_phandle(NULL, phandle));
+ else
+ node.of_offset = fdt_node_offset_by_phandle(gd->fdt_blob,
+ phandle);
+
+ return node;
+}
+
+ofnode oftree_get_by_phandle(oftree tree, uint phandle)
+{
+ ofnode node;
+
+ if (of_live_active())
+ node = np_to_ofnode(of_find_node_by_phandle(tree.np, phandle));
+ else
+ node = ofnode_from_tree_offset(tree,
+ fdt_node_offset_by_phandle(oftree_lookup_fdt(tree),
+ phandle));
+
+ return node;
+}
+
+static fdt_addr_t __ofnode_get_addr_size_index(ofnode node, int index,
+ fdt_size_t *size, bool translate)
+{
+ int na, ns;
+
+ if (size)
+ *size = FDT_SIZE_T_NONE;
+
+ if (ofnode_is_np(node)) {
+ const __be32 *prop_val;
+ u64 size64;
+ uint flags;
+
+ prop_val = of_get_address(ofnode_to_np(node), index, &size64,
+ &flags);
+ if (!prop_val)
+ return FDT_ADDR_T_NONE;
+
+ if (size)
+ *size = size64;
+
+ ns = of_n_size_cells(ofnode_to_np(node));
+
+ if (translate && IS_ENABLED(CONFIG_OF_TRANSLATE) && ns > 0) {
+ return of_translate_address(ofnode_to_np(node), prop_val);
+ } else {
+ na = of_n_addr_cells(ofnode_to_np(node));
+ return of_read_number(prop_val, na);
+ }
+ } else {
+ na = ofnode_read_simple_addr_cells(ofnode_get_parent(node));
+ ns = ofnode_read_simple_size_cells(ofnode_get_parent(node));
+ return fdtdec_get_addr_size_fixed(ofnode_to_fdt(node),
+ ofnode_to_offset(node), "reg",
+ index, na, ns, size,
+ translate);
+ }
+}
+
+fdt_addr_t ofnode_get_addr_size_index(ofnode node, int index, fdt_size_t *size)
+{
+ return __ofnode_get_addr_size_index(node, index, size, true);
+}
+
+fdt_addr_t ofnode_get_addr_size_index_notrans(ofnode node, int index,
+ fdt_size_t *size)
+{
+ return __ofnode_get_addr_size_index(node, index, size, false);
+}
+
+fdt_addr_t ofnode_get_addr_index(ofnode node, int index)
+{
+ fdt_size_t size;
+
+ return ofnode_get_addr_size_index(node, index, &size);
+}
+
+fdt_addr_t ofnode_get_addr(ofnode node)
+{
+ return ofnode_get_addr_index(node, 0);
+}
+
+fdt_size_t ofnode_get_size(ofnode node)
+{
+ fdt_size_t size;
+
+ ofnode_get_addr_size_index(node, 0, &size);
+
+ return size;
+}
+
+int ofnode_stringlist_search(ofnode node, const char *property,
+ const char *string)
+{
+ if (ofnode_is_np(node)) {
+ return of_property_match_string(ofnode_to_np(node),
+ property, string);
+ } else {
+ int ret;
+
+ ret = fdt_stringlist_search(ofnode_to_fdt(node),
+ ofnode_to_offset(node), property,
+ string);
+ if (ret == -FDT_ERR_NOTFOUND)
+ return -ENODATA;
+ else if (ret < 0)
+ return -EINVAL;
+
+ return ret;
+ }
+}
+
+int ofnode_read_string_index(ofnode node, const char *property, int index,
+ const char **outp)
+{
+ if (ofnode_is_np(node)) {
+ return of_property_read_string_index(ofnode_to_np(node),
+ property, index, outp);
+ } else {
+ int len;
+
+ *outp = fdt_stringlist_get(ofnode_to_fdt(node),
+ ofnode_to_offset(node),
+ property, index, &len);
+ if (len < 0)
+ return -EINVAL;
+ return 0;
+ }
+}
+
+int ofnode_read_string_count(ofnode node, const char *property)
+{
+ if (ofnode_is_np(node)) {
+ return of_property_count_strings(ofnode_to_np(node), property);
+ } else {
+ return fdt_stringlist_count(ofnode_to_fdt(node),
+ ofnode_to_offset(node), property);
+ }
+}
+
+int ofnode_read_string_list(ofnode node, const char *property,
+ const char ***listp)
+{
+ const char **prop;
+ int count;
+ int i;
+
+ *listp = NULL;
+ count = ofnode_read_string_count(node, property);
+ if (count < 0)
+ return count;
+ if (!count)
+ return 0;
+
+ prop = calloc(count + 1, sizeof(char *));
+ if (!prop)
+ return -ENOMEM;
+
+ for (i = 0; i < count; i++)
+ ofnode_read_string_index(node, property, i, &prop[i]);
+ prop[count] = NULL;
+ *listp = prop;
+
+ return count;
+}
+
+static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in,
+ struct ofnode_phandle_args *out)
+{
+ assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
+ out->node = offset_to_ofnode(in->node);
+ out->args_count = in->args_count;
+ memcpy(out->args, in->args, sizeof(out->args));
+}
+
+static void ofnode_from_of_phandle_args(struct of_phandle_args *in,
+ struct ofnode_phandle_args *out)
+{
+ assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
+ out->node = np_to_ofnode(in->np);
+ out->args_count = in->args_count;
+ memcpy(out->args, in->args, sizeof(out->args));
+}
+
+int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
+ const char *cells_name, int cell_count,
+ int index,
+ struct ofnode_phandle_args *out_args)
+{
+ if (ofnode_is_np(node)) {
+ struct of_phandle_args args;
+ int ret;
+
+ ret = of_parse_phandle_with_args(ofnode_to_np(node),
+ list_name, cells_name,
+ cell_count, index,
+ &args);
+ if (ret)
+ return ret;
+ ofnode_from_of_phandle_args(&args, out_args);
+ } else {
+ struct fdtdec_phandle_args args;
+ int ret;
+
+ ret = fdtdec_parse_phandle_with_args(ofnode_to_fdt(node),
+ ofnode_to_offset(node),
+ list_name, cells_name,
+ cell_count, index, &args);
+ if (ret)
+ return ret;
+ ofnode_from_fdtdec_phandle_args(&args, out_args);
+ }
+
+ return 0;
+}
+
+int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
+ const char *cells_name, int cell_count)
+{
+ if (ofnode_is_np(node))
+ return of_count_phandle_with_args(ofnode_to_np(node),
+ list_name, cells_name, cell_count);
+ else
+ return fdtdec_parse_phandle_with_args(ofnode_to_fdt(node),
+ ofnode_to_offset(node), list_name, cells_name,
+ cell_count, -1, NULL);
+}
+
+ofnode ofnode_path(const char *path)
+{
+ if (of_live_active())
+ return np_to_ofnode(of_find_node_by_path(path));
+ else
+ return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
+}
+
+ofnode oftree_root(oftree tree)
+{
+ if (of_live_active()) {
+ return np_to_ofnode(tree.np);
+ } else {
+ return ofnode_from_tree_offset(tree, 0);
+ }
+}
+
+ofnode oftree_path(oftree tree, const char *path)
+{
+ if (of_live_active()) {
+ return np_to_ofnode(of_find_node_opts_by_path(tree.np, path,
+ NULL));
+ } else if (*path != '/' && tree.fdt != gd->fdt_blob) {
+ return ofnode_null(); /* Aliases only on control FDT */
+ } else {
+ int offset = fdt_path_offset(tree.fdt, path);
+
+ return ofnode_from_tree_offset(tree, offset);
+ }
+}
+
+const void *ofnode_read_chosen_prop(const char *propname, int *sizep)
+{
+ ofnode chosen_node;
+
+ chosen_node = ofnode_path("/chosen");
+
+ return ofnode_read_prop(chosen_node, propname, sizep);
+}
+
+const char *ofnode_read_chosen_string(const char *propname)
+{
+ return ofnode_read_chosen_prop(propname, NULL);
+}
+
+ofnode ofnode_get_chosen_node(const char *name)
+{
+ const char *prop;
+
+ prop = ofnode_read_chosen_prop(name, NULL);
+ if (!prop)
+ return ofnode_null();
+
+ return ofnode_path(prop);
+}
+
+int ofnode_read_baud(void)
+{
+ const char *str, *p;
+ u32 baud;
+
+ str = ofnode_read_chosen_string("stdout-path");
+ if (!str)
+ return -EINVAL;
+
+ /* Parse string serial0:115200n8 */
+ p = strchr(str, ':');
+ if (!p)
+ return -EINVAL;
+
+ baud = dectoul(p + 1, NULL);
+ return baud;
+}
+
+const void *ofnode_read_aliases_prop(const char *propname, int *sizep)
+{
+ ofnode node;
+
+ node = ofnode_path("/aliases");
+
+ return ofnode_read_prop(node, propname, sizep);
+}
+
+ofnode ofnode_get_aliases_node(const char *name)
+{
+ const char *prop;
+
+ prop = ofnode_read_aliases_prop(name, NULL);
+ if (!prop)
+ return ofnode_null();
+
+ debug("%s: node_path: %s\n", __func__, prop);
+
+ return ofnode_path(prop);
+}
+
+int ofnode_get_child_count(ofnode parent)
+{
+ ofnode child;
+ int num = 0;
+
+ ofnode_for_each_subnode(child, parent)
+ num++;
+
+ return num;
+}
+
+static int decode_timing_property(ofnode node, const char *name,
+ struct timing_entry *result)
+{
+ int length, ret = 0;
+
+ length = ofnode_read_size(node, name);
+ if (length < 0) {
+ debug("%s: could not find property %s\n",
+ ofnode_get_name(node), name);
+ return length;
+ }
+
+ if (length == sizeof(u32)) {
+ result->typ = ofnode_read_u32_default(node, name, 0);
+ result->min = result->typ;
+ result->max = result->typ;
+ } else {
+ ret = ofnode_read_u32_array(node, name, &result->min, 3);
+ }
+
+ return ret;
+}
+
+int ofnode_decode_display_timing(ofnode parent, int index,
+ struct display_timing *dt)
+{
+ int i;
+ ofnode timings, node;
+ u32 val = 0;
+ int ret = 0;
+
+ timings = ofnode_find_subnode(parent, "display-timings");
+ if (!ofnode_valid(timings))
+ return -EINVAL;
+
+ i = 0;
+ ofnode_for_each_subnode(node, timings) {
+ if (i++ == index)
+ break;
+ }
+
+ if (!ofnode_valid(node))
+ return -EINVAL;
+
+ memset(dt, 0, sizeof(*dt));
+
+ ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
+ ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
+ ret |= decode_timing_property(node, "hactive", &dt->hactive);
+ ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
+ ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
+ ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
+ ret |= decode_timing_property(node, "vactive", &dt->vactive);
+ ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
+ ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
+
+ dt->flags = 0;
+ val = ofnode_read_u32_default(node, "vsync-active", -1);
+ if (val != -1) {
+ dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
+ DISPLAY_FLAGS_VSYNC_LOW;
+ }
+ val = ofnode_read_u32_default(node, "hsync-active", -1);
+ if (val != -1) {
+ dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
+ DISPLAY_FLAGS_HSYNC_LOW;
+ }
+ val = ofnode_read_u32_default(node, "de-active", -1);
+ if (val != -1) {
+ dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
+ DISPLAY_FLAGS_DE_LOW;
+ }
+ val = ofnode_read_u32_default(node, "pixelclk-active", -1);
+ if (val != -1) {
+ dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
+ DISPLAY_FLAGS_PIXDATA_NEGEDGE;
+ }
+
+ if (ofnode_read_bool(node, "interlaced"))
+ dt->flags |= DISPLAY_FLAGS_INTERLACED;
+ if (ofnode_read_bool(node, "doublescan"))
+ dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
+ if (ofnode_read_bool(node, "doubleclk"))
+ dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
+
+ return ret;
+}
+
+int ofnode_decode_panel_timing(ofnode parent,
+ struct display_timing *dt)
+{
+ ofnode timings;
+ u32 val = 0;
+ int ret = 0;
+
+ timings = ofnode_find_subnode(parent, "panel-timing");
+ if (!ofnode_valid(timings))
+ return -EINVAL;
+ memset(dt, 0, sizeof(*dt));
+ ret |= decode_timing_property(timings, "hback-porch", &dt->hback_porch);
+ ret |= decode_timing_property(timings, "hfront-porch", &dt->hfront_porch);
+ ret |= decode_timing_property(timings, "hactive", &dt->hactive);
+ ret |= decode_timing_property(timings, "hsync-len", &dt->hsync_len);
+ ret |= decode_timing_property(timings, "vback-porch", &dt->vback_porch);
+ ret |= decode_timing_property(timings, "vfront-porch", &dt->vfront_porch);
+ ret |= decode_timing_property(timings, "vactive", &dt->vactive);
+ ret |= decode_timing_property(timings, "vsync-len", &dt->vsync_len);
+ ret |= decode_timing_property(timings, "clock-frequency", &dt->pixelclock);
+ dt->flags = 0;
+ if (!ofnode_read_u32(timings, "vsync-active", &val)) {
+ dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
+ DISPLAY_FLAGS_VSYNC_LOW;
+ }
+ if (!ofnode_read_u32(timings, "hsync-active", &val)) {
+ dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
+ DISPLAY_FLAGS_HSYNC_LOW;
+ }
+ if (!ofnode_read_u32(timings, "de-active", &val)) {
+ dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
+ DISPLAY_FLAGS_DE_LOW;
+ }
+ if (!ofnode_read_u32(timings, "pixelclk-active", &val)) {
+ dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
+ DISPLAY_FLAGS_PIXDATA_NEGEDGE;
+ }
+ if (ofnode_read_bool(timings, "interlaced"))
+ dt->flags |= DISPLAY_FLAGS_INTERLACED;
+ if (ofnode_read_bool(timings, "doublescan"))
+ dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
+ if (ofnode_read_bool(timings, "doubleclk"))
+ dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
+
+ return ret;
+}
+
+const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
+{
+ if (ofnode_is_np(node))
+ return of_get_property(ofnode_to_np(node), propname, lenp);
+ else
+ return fdt_getprop(ofnode_to_fdt(node), ofnode_to_offset(node),
+ propname, lenp);
+}
+
+bool ofnode_has_property(ofnode node, const char *propname)
+{
+ if (ofnode_is_np(node))
+ return of_find_property(ofnode_to_np(node), propname, NULL);
+ else
+ return ofnode_get_property(node, propname, NULL);
+}
+
+int ofnode_first_property(ofnode node, struct ofprop *prop)
+{
+ prop->node = node;
+
+ if (ofnode_is_np(node)) {
+ prop->prop = of_get_first_property(ofnode_to_np(prop->node));
+ if (!prop->prop)
+ return -FDT_ERR_NOTFOUND;
+ } else {
+ prop->offset =
+ fdt_first_property_offset(ofnode_to_fdt(node),
+ ofnode_to_offset(prop->node));
+ if (prop->offset < 0)
+ return prop->offset;
+ }
+
+ return 0;
+}
+
+int ofnode_next_property(struct ofprop *prop)
+{
+ if (ofnode_is_np(prop->node)) {
+ prop->prop = of_get_next_property(ofnode_to_np(prop->node),
+ prop->prop);
+ if (!prop->prop)
+ return -FDT_ERR_NOTFOUND;
+ } else {
+ prop->offset =
+ fdt_next_property_offset(ofnode_to_fdt(prop->node),
+ prop->offset);
+ if (prop->offset < 0)
+ return prop->offset;
+ }
+
+ return 0;
+}
+
+const void *ofprop_get_property(const struct ofprop *prop,
+ const char **propname, int *lenp)
+{
+ if (ofnode_is_np(prop->node))
+ return of_get_property_by_prop(ofnode_to_np(prop->node),
+ prop->prop, propname, lenp);
+ else
+ return fdt_getprop_by_offset(ofnode_to_fdt(prop->node),
+ prop->offset,
+ propname, lenp);
+}
+
+fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property,
+ fdt_size_t *sizep)
+{
+ if (ofnode_is_np(node)) {
+ int na, ns;
+ int psize;
+ const struct device_node *np = ofnode_to_np(node);
+ const __be32 *prop = of_get_property(np, property, &psize);
+
+ if (!prop)
+ return FDT_ADDR_T_NONE;
+ na = of_n_addr_cells(np);
+ ns = of_n_size_cells(np);
+ *sizep = of_read_number(prop + na, ns);
+
+ if (CONFIG_IS_ENABLED(OF_TRANSLATE) && ns > 0)
+ return of_translate_address(np, prop);
+ else
+ return of_read_number(prop, na);
+ } else {
+ return fdtdec_get_addr_size(ofnode_to_fdt(node),
+ ofnode_to_offset(node), property,
+ sizep);
+ }
+}
+
+const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
+ size_t sz)
+{
+ if (ofnode_is_np(node)) {
+ const struct device_node *np = ofnode_to_np(node);
+ int psize;
+ const __be32 *prop = of_get_property(np, propname, &psize);
+
+ if (!prop || sz != psize)
+ return NULL;
+ return (uint8_t *)prop;
+
+ } else {
+ return fdtdec_locate_byte_array(ofnode_to_fdt(node),
+ ofnode_to_offset(node), propname, sz);
+ }
+}
+
+int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
+ const char *propname, struct fdt_pci_addr *addr,
+ fdt_size_t *size)
+{
+ const fdt32_t *cell;
+ int len;
+ int ret = -ENOENT;
+
+ debug("%s: %s: ", __func__, propname);
+
+ /*
+ * If we follow the pci bus bindings strictly, we should check
+ * the value of the node's parent node's #address-cells and
+ * #size-cells. They need to be 3 and 2 accordingly. However,
+ * for simplicity we skip the check here.
+ */
+ cell = ofnode_get_property(node, propname, &len);
+ if (!cell)
+ goto fail;
+
+ if ((len % FDT_PCI_REG_SIZE) == 0) {
+ int num = len / FDT_PCI_REG_SIZE;
+ int i;
+
+ for (i = 0; i < num; i++) {
+ debug("pci address #%d: %08lx %08lx %08lx\n", i,
+ (ulong)fdt32_to_cpu(cell[0]),
+ (ulong)fdt32_to_cpu(cell[1]),
+ (ulong)fdt32_to_cpu(cell[2]));
+ if ((fdt32_to_cpu(*cell) & type) == type) {
+ const unaligned_fdt64_t *ptr;
+
+ addr->phys_hi = fdt32_to_cpu(cell[0]);
+ addr->phys_mid = fdt32_to_cpu(cell[1]);
+ addr->phys_lo = fdt32_to_cpu(cell[2]);
+ ptr = (const unaligned_fdt64_t *)(cell + 3);
+ if (size)
+ *size = fdt64_to_cpu(*ptr);
+ break;
+ }
+
+ cell += FDT_PCI_ADDR_CELLS + FDT_PCI_SIZE_CELLS;
+ }
+
+ if (i == num) {
+ ret = -ENXIO;
+ goto fail;
+ }
+
+ return 0;
+ }
+
+ ret = -EINVAL;
+
+fail:
+ debug("(not found)\n");
+ return ret;
+}
+
+int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device)
+{
+ const char *list, *end;
+ int len;
+
+ list = ofnode_get_property(node, "compatible", &len);
+ if (!list)
+ return -ENOENT;
+
+ end = list + len;
+ while (list < end) {
+ len = strlen(list);
+ if (len >= strlen("pciVVVV,DDDD")) {
+ char *s = strstr(list, "pci");
+
+ /*
+ * check if the string is something like pciVVVV,DDDD.RR
+ * or just pciVVVV,DDDD
+ */
+ if (s && s[7] == ',' &&
+ (s[12] == '.' || s[12] == 0)) {
+ s += 3;
+ *vendor = simple_strtol(s, NULL, 16);
+
+ s += 5;
+ *device = simple_strtol(s, NULL, 16);
+
+ return 0;
+ }
+ }
+ list += (len + 1);
+ }
+
+ return -ENOENT;
+}
+
+int ofnode_read_eth_phy_id(ofnode node, u16 *vendor, u16 *device)
+{
+ const char *list, *end;
+ int len;
+
+ list = ofnode_get_property(node, "compatible", &len);
+
+ if (!list)
+ return -ENOENT;
+
+ end = list + len;
+ while (list < end) {
+ len = strlen(list);
+
+ if (len >= strlen("ethernet-phy-idVVVV.DDDD")) {
+ char *s = strstr(list, "ethernet-phy-id");
+
+ /*
+ * check if the string is something like
+ * ethernet-phy-idVVVV.DDDD
+ */
+ if (s && s[19] == '.') {
+ s += strlen("ethernet-phy-id");
+ *vendor = simple_strtol(s, NULL, 16);
+ s += 5;
+ *device = simple_strtol(s, NULL, 16);
+
+ return 0;
+ }
+ }
+ list += (len + 1);
+ }
+
+ return -ENOENT;
+}
+
+int ofnode_read_addr_cells(ofnode node)
+{
+ if (ofnode_is_np(node)) {
+ return of_n_addr_cells(ofnode_to_np(node));
+ } else {
+ int parent = fdt_parent_offset(ofnode_to_fdt(node),
+ ofnode_to_offset(node));
+
+ return fdt_address_cells(ofnode_to_fdt(node), parent);
+ }
+}
+
+int ofnode_read_size_cells(ofnode node)
+{
+ if (ofnode_is_np(node)) {
+ return of_n_size_cells(ofnode_to_np(node));
+ } else {
+ int parent = fdt_parent_offset(ofnode_to_fdt(node),
+ ofnode_to_offset(node));
+
+ return fdt_size_cells(ofnode_to_fdt(node), parent);
+ }
+}
+
+int ofnode_read_simple_addr_cells(ofnode node)
+{
+ if (ofnode_is_np(node))
+ return of_simple_addr_cells(ofnode_to_np(node));
+ else
+ return fdt_address_cells(ofnode_to_fdt(node),
+ ofnode_to_offset(node));
+}
+
+int ofnode_read_simple_size_cells(ofnode node)
+{
+ if (ofnode_is_np(node))
+ return of_simple_size_cells(ofnode_to_np(node));
+ else
+ return fdt_size_cells(ofnode_to_fdt(node),
+ ofnode_to_offset(node));
+}
+
+bool ofnode_pre_reloc(ofnode node)
+{
+#if defined(CONFIG_SPL_BUILD) || defined(CONFIG_TPL_BUILD)
+ /* for SPL and TPL the remaining nodes after the fdtgrep 1st pass
+ * had property bootph-all or bootph-pre-sram/bootph-pre-ram.
+ * They are removed in final dtb (fdtgrep 2nd pass)
+ */
+ return true;
+#else
+ if (ofnode_read_bool(node, "bootph-all"))
+ return true;
+ if (ofnode_read_bool(node, "bootph-some-ram"))
+ return true;
+
+ /*
+ * In regular builds individual spl and tpl handling both
+ * count as handled pre-relocation for later second init.
+ */
+ if (ofnode_read_bool(node, "bootph-pre-ram") ||
+ ofnode_read_bool(node, "bootph-pre-sram"))
+ return gd->flags & GD_FLG_RELOC;
+
+ if (IS_ENABLED(CONFIG_OF_TAG_MIGRATE)) {
+ /* detect and handle old tags */
+ if (ofnode_read_bool(node, "u-boot,dm-pre-reloc") ||
+ ofnode_read_bool(node, "u-boot,dm-pre-proper") ||
+ ofnode_read_bool(node, "u-boot,dm-spl") ||
+ ofnode_read_bool(node, "u-boot,dm-tpl") ||
+ ofnode_read_bool(node, "u-boot,dm-vpl")) {
+ gd->flags |= GD_FLG_OF_TAG_MIGRATE;
+ return true;
+ }
+ }
+
+ return false;
+#endif
+}
+
+int ofnode_read_resource(ofnode node, uint index, struct resource *res)
+{
+ if (ofnode_is_np(node)) {
+ return of_address_to_resource(ofnode_to_np(node), index, res);
+ } else {
+ struct fdt_resource fres;
+ int ret;
+
+ ret = fdt_get_resource(ofnode_to_fdt(node),
+ ofnode_to_offset(node),
+ "reg", index, &fres);
+ if (ret < 0)
+ return -EINVAL;
+ memset(res, '\0', sizeof(*res));
+ res->start = fres.start;
+ res->end = fres.end;
+
+ return 0;
+ }
+}
+
+int ofnode_read_resource_byname(ofnode node, const char *name,
+ struct resource *res)
+{
+ int index;
+
+ index = ofnode_stringlist_search(node, "reg-names", name);
+ if (index < 0)
+ return index;
+
+ return ofnode_read_resource(node, index, res);
+}
+
+u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr)
+{
+ if (ofnode_is_np(node))
+ return of_translate_address(ofnode_to_np(node), in_addr);
+ else
+ return fdt_translate_address(ofnode_to_fdt(node),
+ ofnode_to_offset(node), in_addr);
+}
+
+u64 ofnode_translate_dma_address(ofnode node, const fdt32_t *in_addr)
+{
+ if (ofnode_is_np(node))
+ return of_translate_dma_address(ofnode_to_np(node), in_addr);
+ else
+ return fdt_translate_dma_address(ofnode_to_fdt(node),
+ ofnode_to_offset(node), in_addr);
+}
+
+int ofnode_get_dma_range(ofnode node, phys_addr_t *cpu, dma_addr_t *bus, u64 *size)
+{
+ if (ofnode_is_np(node))
+ return of_get_dma_range(ofnode_to_np(node), cpu, bus, size);
+ else
+ return fdt_get_dma_range(ofnode_to_fdt(node),
+ ofnode_to_offset(node),
+ cpu, bus, size);
+}
+
+int ofnode_device_is_compatible(ofnode node, const char *compat)
+{
+ if (ofnode_is_np(node))
+ return of_device_is_compatible(ofnode_to_np(node), compat,
+ NULL, NULL);
+ else
+ return !fdt_node_check_compatible(ofnode_to_fdt(node),
+ ofnode_to_offset(node),
+ compat);
+}
+
+ofnode ofnode_by_compatible(ofnode from, const char *compat)
+{
+ if (of_live_active()) {
+ return np_to_ofnode(of_find_compatible_node(
+ (struct device_node *)ofnode_to_np(from), NULL,
+ compat));
+ } else {
+ return noffset_to_ofnode(from,
+ fdt_node_offset_by_compatible(ofnode_to_fdt(from),
+ ofnode_to_offset(from), compat));
+ }
+}
+
+ofnode ofnode_by_prop_value(ofnode from, const char *propname,
+ const void *propval, int proplen)
+{
+ if (of_live_active()) {
+ return np_to_ofnode(of_find_node_by_prop_value(
+ (struct device_node *)ofnode_to_np(from), propname,
+ propval, proplen));
+ } else {
+ return noffset_to_ofnode(from,
+ fdt_node_offset_by_prop_value(ofnode_to_fdt(from),
+ ofnode_to_offset(from), propname, propval,
+ proplen));
+ }
+}
+
+int ofnode_write_prop(ofnode node, const char *propname, const void *value,
+ int len, bool copy)
+{
+ if (of_live_active()) {
+ void *newval;
+ int ret;
+
+ if (copy) {
+ newval = malloc(len);
+ if (!newval)
+ return log_ret(-ENOMEM);
+ memcpy(newval, value, len);
+ value = newval;
+ }
+ ret = of_write_prop(ofnode_to_np(node), propname, len, value);
+ if (ret && copy)
+ free(newval);
+ return ret;
+ } else {
+ return fdt_setprop(ofnode_to_fdt(node), ofnode_to_offset(node),
+ propname, value, len);
+ }
+}
+
+int ofnode_write_string(ofnode node, const char *propname, const char *value)
+{
+ assert(ofnode_valid(node));
+
+ debug("%s: %s = %s", __func__, propname, value);
+
+ return ofnode_write_prop(node, propname, value, strlen(value) + 1,
+ false);
+}
+
+int ofnode_write_u32(ofnode node, const char *propname, u32 value)
+{
+ fdt32_t *val;
+
+ assert(ofnode_valid(node));
+
+ log_debug("%s = %x", propname, value);
+ val = malloc(sizeof(*val));
+ if (!val)
+ return -ENOMEM;
+ *val = cpu_to_fdt32(value);
+
+ return ofnode_write_prop(node, propname, val, sizeof(value), true);
+}
+
+int ofnode_write_u64(ofnode node, const char *propname, u64 value)
+{
+ fdt64_t *val;
+
+ assert(ofnode_valid(node));
+
+ log_debug("%s = %llx", propname, (unsigned long long)value);
+ val = malloc(sizeof(*val));
+ if (!val)
+ return -ENOMEM;
+ *val = cpu_to_fdt64(value);
+
+ return ofnode_write_prop(node, propname, val, sizeof(value), true);
+}
+
+int ofnode_write_bool(ofnode node, const char *propname, bool value)
+{
+ if (value)
+ return ofnode_write_prop(node, propname, NULL, 0, false);
+ else
+ return ofnode_delete_prop(node, propname);
+}
+
+int ofnode_delete_prop(ofnode node, const char *propname)
+{
+ if (ofnode_is_np(node)) {
+ struct property *prop;
+ int len;
+
+ prop = of_find_property(ofnode_to_np(node), propname, &len);
+ if (prop)
+ return of_remove_property(ofnode_to_np(node), prop);
+ return 0;
+ } else {
+ return fdt_delprop(ofnode_to_fdt(node), ofnode_to_offset(node),
+ propname);
+ }
+}
+
+int ofnode_set_enabled(ofnode node, bool value)
+{
+ assert(ofnode_valid(node));
+
+ if (value)
+ return ofnode_write_string(node, "status", "okay");
+ else
+ return ofnode_write_string(node, "status", "disabled");
+}
+
+bool ofnode_conf_read_bool(const char *prop_name)
+{
+ ofnode node;
+
+ node = ofnode_path("/config");
+ if (!ofnode_valid(node))
+ return false;
+
+ return ofnode_read_bool(node, prop_name);
+}
+
+int ofnode_conf_read_int(const char *prop_name, int default_val)
+{
+ ofnode node;
+
+ node = ofnode_path("/config");
+ if (!ofnode_valid(node))
+ return default_val;
+
+ return ofnode_read_u32_default(node, prop_name, default_val);
+}
+
+const char *ofnode_conf_read_str(const char *prop_name)
+{
+ ofnode node;
+
+ node = ofnode_path("/config");
+ if (!ofnode_valid(node))
+ return NULL;
+
+ return ofnode_read_string(node, prop_name);
+}
+
+int ofnode_read_bootscript_address(u64 *bootscr_address, u64 *bootscr_offset)
+{
+ int ret;
+ ofnode uboot;
+
+ *bootscr_address = 0;
+ *bootscr_offset = 0;
+
+ uboot = ofnode_path("/options/u-boot");
+ if (!ofnode_valid(uboot)) {
+ debug("%s: Missing /u-boot node\n", __func__);
+ return -EINVAL;
+ }
+
+ ret = ofnode_read_u64(uboot, "bootscr-address", bootscr_address);
+ if (ret) {
+ ret = ofnode_read_u64(uboot, "bootscr-ram-offset",
+ bootscr_offset);
+ if (ret)
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int ofnode_read_bootscript_flash(u64 *bootscr_flash_offset,
+ u64 *bootscr_flash_size)
+{
+ int ret;
+ ofnode uboot;
+
+ *bootscr_flash_offset = 0;
+ *bootscr_flash_size = 0;
+
+ uboot = ofnode_path("/options/u-boot");
+ if (!ofnode_valid(uboot)) {
+ debug("%s: Missing /u-boot node\n", __func__);
+ return -EINVAL;
+ }
+
+ ret = ofnode_read_u64(uboot, "bootscr-flash-offset",
+ bootscr_flash_offset);
+ if (ret)
+ return -EINVAL;
+
+ ret = ofnode_read_u64(uboot, "bootscr-flash-size",
+ bootscr_flash_size);
+ if (ret)
+ return -EINVAL;
+
+ if (!bootscr_flash_size) {
+ debug("bootscr-flash-size is zero. Ignoring properties!\n");
+ *bootscr_flash_offset = 0;
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+ofnode ofnode_get_phy_node(ofnode node)
+{
+ /* DT node properties that reference a PHY node */
+ static const char * const phy_handle_str[] = {
+ "phy-handle", "phy", "phy-device",
+ };
+ struct ofnode_phandle_args args = {
+ .node = ofnode_null()
+ };
+ int i;
+
+ assert(ofnode_valid(node));
+
+ for (i = 0; i < ARRAY_SIZE(phy_handle_str); i++)
+ if (!ofnode_parse_phandle_with_args(node, phy_handle_str[i],
+ NULL, 0, 0, &args))
+ break;
+
+ return args.node;
+}
+
+phy_interface_t ofnode_read_phy_mode(ofnode node)
+{
+ const char *mode;
+ int i;
+
+ assert(ofnode_valid(node));
+
+ mode = ofnode_read_string(node, "phy-mode");
+ if (!mode)
+ mode = ofnode_read_string(node, "phy-connection-type");
+
+ if (!mode)
+ return PHY_INTERFACE_MODE_NA;
+
+ for (i = 0; i < PHY_INTERFACE_MODE_MAX; i++)
+ if (!strcmp(mode, phy_interface_strings[i]))
+ return i;
+
+ debug("%s: Invalid PHY interface '%s'\n", __func__, mode);
+
+ return PHY_INTERFACE_MODE_NA;
+}
+
+int ofnode_add_subnode(ofnode node, const char *name, ofnode *subnodep)
+{
+ ofnode subnode;
+ int ret = 0;
+
+ assert(ofnode_valid(node));
+
+ if (ofnode_is_np(node)) {
+ struct device_node *np, *child;
+
+ np = (struct device_node *)ofnode_to_np(node);
+ ret = of_add_subnode(np, name, -1, &child);
+ if (ret && ret != -EEXIST)
+ return ret;
+ subnode = np_to_ofnode(child);
+ } else {
+ void *fdt = ofnode_to_fdt(node);
+ int poffset = ofnode_to_offset(node);
+ int offset;
+
+ offset = fdt_add_subnode(fdt, poffset, name);
+ if (offset == -FDT_ERR_EXISTS) {
+ offset = fdt_subnode_offset(fdt, poffset, name);
+ ret = -EEXIST;
+ }
+ if (offset < 0)
+ return -EINVAL;
+ subnode = noffset_to_ofnode(node, offset);
+ }
+
+ *subnodep = subnode;
+
+ return ret; /* 0 or -EEXIST */
+}
+
+int ofnode_delete(ofnode *nodep)
+{
+ ofnode node = *nodep;
+ int ret;
+
+ assert(ofnode_valid(node));
+ if (ofnode_is_np(node)) {
+ ret = of_remove_node(ofnode_to_np(node));
+ } else {
+ void *fdt = ofnode_to_fdt(node);
+ int offset = ofnode_to_offset(node);
+
+ ret = fdt_del_node(fdt, offset);
+ if (ret)
+ ret = -EFAULT;
+ }
+ if (ret)
+ return ret;
+ *nodep = ofnode_null();
+
+ return 0;
+}
+
+int ofnode_copy_props(ofnode dst, ofnode src)
+{
+ struct ofprop prop;
+
+ ofnode_for_each_prop(prop, src) {
+ const char *name;
+ const char *val;
+ int len, ret;
+
+ val = ofprop_get_property(&prop, &name, &len);
+ if (!val) {
+ log_debug("Cannot read prop (err=%d)\n", len);
+ return log_msg_ret("get", -EINVAL);
+ }
+ ret = ofnode_write_prop(dst, name, val, len, true);
+ if (ret) {
+ log_debug("Cannot write prop (err=%d)\n", ret);
+ return log_msg_ret("wr", -EINVAL);
+ }
+ }
+
+ return 0;
+}
+
+int ofnode_copy_node(ofnode dst_parent, const char *name, ofnode src,
+ ofnode *nodep)
+{
+ ofnode node;
+ int ret;
+
+ ret = ofnode_add_subnode(dst_parent, name, &node);
+ if (ret) {
+ if (ret == -EEXIST)
+ *nodep = node;
+ return log_msg_ret("add", ret);
+ }
+ ret = ofnode_copy_props(node, src);
+ if (ret)
+ return log_msg_ret("cpy", ret);
+ *nodep = node;
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.0.4) at 2025-07-18 10:16:08 +0000