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fdt: Add a function to look up a /chosen property

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It is sometimes useful to find a property in the chosen node. Add a function
for this.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Simon Glass
2015-10-17 19:41:14 -06:00
committed by Michal Simek
parent 44303dfa79
commit 3bc37a50e0
2 changed files with 21 additions and 7 deletions
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17
lib/fdtdec.c
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@@ -601,16 +601,21 @@ int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
return -ENOENT;
}
const char *fdtdec_get_chosen_prop(const void *blob, const char *name)
{
int chosen_node;
if (!blob)
return NULL;
chosen_node = fdt_path_offset(blob, "/chosen");
return fdt_getprop(blob, chosen_node, name, NULL);
}
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);
prop = fdtdec_get_chosen_prop(blob, name);
if (!prop)
return -FDT_ERR_NOTFOUND;
return fdt_path_offset(blob, prop);