[PATCH v6 1/2] Add fdtget utility to read property values from a device tree
Jon Loeliger
jdl at jdl.com
Sun Jan 22 08:26:30 EST 2012
> 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 at chromium.org>
Applied.
jdl
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