diff options
| author | Simon Glass <[email protected]> | 2023-09-26 08:14:40 -0600 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2023-10-06 14:38:12 -0400 |
| commit | e0c3c21d8ba1a0abbb7effee6c5a952f3e65a03d (patch) | |
| tree | 305d7d79cd9b6776bcccfd3e4911784bff9fa60f /drivers/core/ofnode.c | |
| parent | 9bf78a5add522dfc3f192eb97fb38d829174d6c7 (diff) | |
dm: core: Add a function to create an empty tree
Provide a function to create a new, empty tree.
Signed-off-by: Simon Glass <[email protected]>
Diffstat (limited to 'drivers/core/ofnode.c')
| -rw-r--r-- | drivers/core/ofnode.c | 56 |
1 files changed, 52 insertions, 4 deletions
diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c index 515396c62f4..d2bdb8b9af1 100644 --- a/drivers/core/ofnode.c +++ b/drivers/core/ofnode.c @@ -47,6 +47,17 @@ static int oftree_find(const void *fdt) 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; @@ -69,11 +80,8 @@ static oftree oftree_ensure(void *fdt) if (gd->flags & GD_FLG_RELOC) { i = oftree_find(fdt); if (i == -1) { - if (oftree_count == CONFIG_OFNODE_MULTI_TREE_MAX) { - log_warning("Too many registered device trees (max %d)\n", - CONFIG_OFNODE_MULTI_TREE_MAX); + if (check_tree_count()) return oftree_null(); - } /* register the new tree */ i = oftree_count++; @@ -92,6 +100,41 @@ static oftree oftree_ensure(void *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()) @@ -193,6 +236,11 @@ static inline int oftree_find(const void *fdt) return 0; } +int oftree_new(oftree *treep) +{ + return -ENOSYS; +} + #endif /* OFNODE_MULTI_TREE */ /** |