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fdt: Add a function to decode a variable-sized u32 array

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Sometimes an array can be of variable size up to a maximum. Add a helper
function to decode this.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2014-11-10 18:00:19 -07:00
parent 768e0f52f2
commit a9f04d49e5
2 changed files with 36 additions and 0 deletions
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20
lib/fdtdec.c
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@@ -485,6 +485,26 @@ int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
return err;
}
int fdtdec_get_int_array_count(const void *blob, int node,
const char *prop_name, u32 *array, int count)
{
const u32 *cell;
int len, elems;
int i;
debug("%s: %s\n", __func__, prop_name);
cell = fdt_getprop(blob, node, prop_name, &len);
if (!cell)
return -FDT_ERR_NOTFOUND;
elems = len / sizeof(u32);
if (count > elems)
count = elems;
for (i = 0; i < count; i++)
array[i] = fdt32_to_cpu(cell[i]);
return count;
}
const u32 *fdtdec_locate_array(const void *blob, int node,
const char *prop_name, int count)
{