diff options
author | Abhilash Kesavan <a.kesavan@samsung.com> | 2012-10-25 16:30:58 (GMT) |
---|---|---|
committer | Gerald Van Baren <gvb@unssw.com> | 2012-11-13 04:00:34 (GMT) |
commit | 09258f1e8b12acc4a2a02b60d942660798038fba (patch) | |
tree | 8dbbdd3551ac7fa56022cc1337032385a42800af /lib/fdtdec.c | |
parent | 59852d03867108217fe88e3bfc3e1e9cedfe63c5 (diff) | |
download | u-boot-09258f1e8b12acc4a2a02b60d942660798038fba.tar.xz |
fdt: Add function to get config int from device tree
Add a function to look up a configuration item such as machine id
and return its value.
Note: The code has been taken as is from the Chromium u-boot development
tree and needs Simon Glass' sign-off.
Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'lib/fdtdec.c')
-rw-r--r-- | lib/fdtdec.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/lib/fdtdec.c b/lib/fdtdec.c index 4c23f45..1f50022 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -512,3 +512,25 @@ const u8 *fdtdec_locate_byte_array(const void *blob, int node, return NULL; return cell; } + +/** + * Look in the FDT for a config item with the given name and return its value + * as a 32-bit integer. The property must have at least 4 bytes of data. The + * value of the first cell is returned. + * + * @param blob FDT blob to use + * @param prop_name Node property name + * @param default_val default value to return if the property is not found + * @return integer value, if found, or default_val if not + */ +int fdtdec_get_config_int(const void *blob, const char *prop_name, + int default_val) +{ + int config_node; + + debug("%s: %s\n", __func__, prop_name); + config_node = fdt_path_offset(blob, "/config"); + if (config_node < 0) + return default_val; + return fdtdec_get_int(blob, config_node, prop_name, default_val); +} |