Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-24 21:54:01 +00:00
Code Issues Projects Releases Packages Wiki Activity

dm: fdt: Add a function to look up a chosen node

Browse source 
Within /chosen we may have a node which points to another node, similar
to how /aliases works. Add a helper function to do this lookup.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2014-09-04 16:27:24 -06:00
parent addf9513d0
commit aac07d49d0
2 changed files with 27 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
include/fdtdec.h
View file

@ -374,6 +374,18 @@ int fdtdec_get_alias_seq(const void *blob, const char *base, int node,
*/
int fdtdec_get_alias_node(const void *blob, const char *name);
/**
* Get the offset of the given chosen node
*
* This looks up a property in /chosen containing the path to another node,
* then finds the offset of that node.
*
* @param blob Device tree blob (if NULL, then error is returned)
* @param name Property name, e.g. "stdout-path"
* @return Node offset referred to by that chosen node, or -ve FDT_ERR_...
*/
int fdtdec_get_chosen_node(const void *blob, const char *name);
/*
* Get the name for a compatible ID
*

15
lib/fdtdec.c
View file

@ -380,6 +380,21 @@ int fdtdec_get_alias_node(const void *blob, const char *name)
return fdt_path_offset(blob, prop);
}
int fdtdec_get_chosen_node(const void *blob, const char *name)
{
const char *prop;
int chosen_node;
int len;
if (!blob)
return -FDT_ERR_NOTFOUND;
chosen_node = fdt_path_offset(blob, "/chosen");
prop = fdt_getprop(blob, chosen_node, name, &len);
if (!prop)
return -FDT_ERR_NOTFOUND;
return fdt_path_offset(blob, prop);
}
int fdtdec_check_fdt(void)
{
/*