binman: Allow reading entries from a subnode

Some images may have multiple copies of the same thing, e.g. two versions
of the read/write U-Boots. It is necessary to read data from one or other
of these under selection of the verified-boot logic. Add a function to
select the subnode to use.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2021-01-13 20:29:57 -07:00 committed by Tom Rini
parent 76b54d8ca1
commit 1e35a4d228
2 changed files with 32 additions and 0 deletions

View File

@ -70,6 +70,20 @@ int binman_entry_find(const char *name, struct binman_entry *entry);
*/
ofnode binman_section_find_node(const char *name);
/**
* binman_select_subnode() - Select a subnode to use to find entries
*
* Normally binman selects the top-level node for future entry requests, such as
* binman_entry_find(). This function allows a subnode to be chosen instead.
*
* @name: Name of subnode, typically a section. This must be in the top-level
* binman node
* @return 0 if OK, -EINVAL if there is no /binman node, -ECHILD if multiple
* images are being used but the first image is not available, -ENOENT if
* the requested subnode cannot be found
*/
int binman_select_subnode(const char *name);
/**
* binman_init() - Set up the binman symbol information
*

View File

@ -116,6 +116,24 @@ int binman_get_rom_offset(void)
return binman->rom_offset;
}
int binman_select_subnode(const char *name)
{
ofnode node;
int ret;
ret = find_image_node(&node);
if (ret)
return log_msg_ret("main", -ENOENT);
node = ofnode_find_subnode(node, name);
if (!ofnode_valid(node))
return log_msg_ret("node", -ENOENT);
binman->image = node;
log_debug("binman: Selected image subnode '%s'\n",
ofnode_get_name(binman->image));
return 0;
}
int binman_init(void)
{
int ret;