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author | Simon Glass <sjg@chromium.org> | 2012-01-21 10:14:47 -0800 |
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committer | Jon Loeliger <jdl@jdl.com> | 2012-01-21 15:08:36 -0600 |
commit | 68d057f20d7c3a93b441d2892c4749392bc83b45 (patch) | |
tree | 7d7a59ced649f453898a79ae8ee17f9bc253a30c /Makefile.utils | |
parent | 69df9f0de25db1c37970850115cdf48335d41802 (diff) | |
download | dtc-68d057f20d7c3a93b441d2892c4749392bc83b45.zip dtc-68d057f20d7c3a93b441d2892c4749392bc83b45.tar.gz dtc-68d057f20d7c3a93b441d2892c4749392bc83b45.tar.bz2 |
Add fdtget utility to read property values from a device tree
This simply utility makes it easy for scripts to read values from the device
tree. It is written in C and uses the same libfdt as the rest of the dtc
package.
What is it for:
- Reading fdt values from scripts
- Extracting fdt information within build systems
- Looking at particular values without having to dump the entire tree
To use it, specify the fdt binary file on command line followed by a list of
node, property pairs. The utility then looks up each node, finds the property
and displays the value.
Each value is printed on a new line.
fdtget tries to guess the type of each property based on its contents. This
is not always reliable, so you can use the -t option to force fdtget to decode
the value as a string, or byte, etc.
To read from stdin, use - as the file.
Usage:
fdtget <options> <dt file> [<node> <property>]...
Options:
-t <type> Type of data
-h Print this help
<type> s=string, i=int, u=unsigned, x=hex
Optional modifier prefix:
hh or b=byte, h=2 byte, l=4 byte (default)
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'Makefile.utils')
-rw-r--r-- | Makefile.utils | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Makefile.utils b/Makefile.utils index fae5b00..38efa3c 100644 --- a/Makefile.utils +++ b/Makefile.utils @@ -8,3 +8,10 @@ FDTDUMP_SRCS = \ util.c FDTDUMP_OBJS = $(FDTDUMP_SRCS:%.c=%.o) + + +FDTGET_SRCS = \ + fdtget.c \ + util.c + +FDTGET_OBJS = $(FDTGET_SRCS:%.c=%.o) |