On Wed, Jun 06, 2018 at 12:33:31PM -0600, Simon Glass wrote: > This is missing at present and the fdtget tool is no-longer trivial. Add > a little bit of information. > > This might be useful for distributions which want to provide a man page. > > Signed-off-by: Simon Glass <sjg@xxxxxxxxxxxx> Applied, thanks. > --- > > Changes in v2: > - Document fdtget as it is now, rather than with the phandle decoding feature > > Documentation/manual.txt | 31 +++++++++++++++++++++++++++++++ > 1 file changed, 31 insertions(+) > > diff --git a/Documentation/manual.txt b/Documentation/manual.txt > index 72403ac..af8d315 100644 > --- a/Documentation/manual.txt > +++ b/Documentation/manual.txt > @@ -693,3 +693,34 @@ Where options are: > -i, --input Input base DT blob > -o, --output Output DT blob > -v, --verbose Verbose message output > + > +4 ) fdtget -- Read properties from device tree > + > +This command can be used to obtain individual values from the device tree in a > +nicely formatted way. You can specify multiple nodes to display (when using -p) > +or multiple node/property pairs (when not using -p). For the latter, each > +property is displayed on its own line, with a space between each cell within > +the property. > + > +The syntax of the fdtget command is: > + > + fdtget <options> <dt file> [<node> <property>]... > + fdtget -p <options> <dt file> [<node> ]... > + > +where options are: > + > + <type> s=string, i=int, u=unsigned, x=hex > + Optional modifier prefix: > + hh or b=byte, h=2 byte, l=4 byte (default) > + > + Options: -[t:pld:hV] > + -t, --type <arg> Type of data > + -p, --properties List properties for each node > + -l, --list List subnodes for each node > + -d, --default <arg> Default value to display when the property is missing > + -h, --help Print this help and exit > + -V, --version Print version and exit > + > +If -t is not provided, fdtget will try to figure out the type, trying to detect > +strings, string lists and the size of each value in the property. This is > +similar to how fdtdump works, and uses the same heuristics. -- David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson
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