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dtc: Add ability to delete nodes and properties

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dtc currently allows the contents of properties to be changed, and the
contents of nodes to be added to. There are situations where removing
properties or nodes may be useful. This change implements the following
syntax to do that:

    / {
        /delete-property/ propname;
        /delete-node/ nodename;
    };

or:

    /delete-node/ &noderef;

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Stephen Warren 2012-08-07 22:50:15 -06:00 • committed by Jon Loeliger
parent 8716901d22
commit 45013d8619
10 changed files with 312 additions and 52 deletions
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14
dtc-lexer.l
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@ -103,6 +103,20 @@ static int pop_input_file(void);
return DT_BITS;
}
<*>"/delete-property/" {
DPRINT("Keyword: /delete-property/\n");
DPRINT("<PROPNODENAME>\n");
BEGIN(PROPNODENAME);
return DT_DEL_PROP;
}
<*>"/delete-node/" {
DPRINT("Keyword: /delete-node/\n");
DPRINT("<PROPNODENAME>\n");
BEGIN(PROPNODENAME);
return DT_DEL_NODE;
}
<*>{LABEL}: {
DPRINT("Label: %s\n", yytext);
yylval.labelref = xstrdup(yytext);