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fdtgrep: Allow propagating properties up to supernodes

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The existing bootph binding is defined such that properties in a
subnode are also implied in the supernode also, as in this example:

   buttons {
      /* bootph,pre-ram is implied by btn1 */
      compatible = "gpio-keys";

      btn1 {
         bootph,pre-ram;
         gpios = <&gpio_a 3 0>;
         label = "button1";
         linux,code = <BTN_1>;
      };

Provide an option to implement this in fdtgrep.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2023-12-17 09:36:22 -07:00
parent 0b2e47be2c
commit 7a06cc2027
1 changed files with 17 additions and 1 deletions
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18
tools/fdtgrep.c
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@ -63,6 +63,7 @@ struct display_info {
int types_inc; /* Mask of types that we include (FDT_IS...) */
int types_exc; /* Mask of types that we exclude (FDT_IS...) */
int invert; /* Invert polarity of match */
int props_up; /* Imply properties up to supernodes */
struct value_node *value_head; /* List of values to match */
const char *output_fname; /* Output filename */
FILE *fout; /* File to write dts/dtb output */
@ -606,6 +607,16 @@ static int check_props(struct display_info *disp, const void *fdt, int node,
strlen(str));
}
/* if requested, check all subnodes for this property too */
if (inc != 1 && disp->props_up) {
int subnode;
for (subnode = fdt_first_subnode(fdt, node);
subnode > 0 && inc != 1;
subnode = fdt_next_subnode(fdt, subnode))
inc = check_props(disp, fdt, subnode, inc);
}
return inc;
}
@ -955,7 +966,7 @@ static const char usage_synopsis[] =
case '?': usage("unknown option");
static const char usage_short_opts[] =
"haAc:b:C:defg:G:HIlLmn:N:o:O:p:P:rRsStTv"
"haAc:b:C:defg:G:HIlLmn:N:o:O:p:P:rRsStTuv"
USAGE_COMMON_SHORT_OPTS;
static const struct option usage_long_opts[] = {
{"show-address", no_argument, NULL, 'a'},
@ -985,6 +996,7 @@ static const struct option usage_long_opts[] = {
{"skip-supernodes", no_argument, NULL, 'S'},
{"show-stringtab", no_argument, NULL, 't'},
{"show-aliases", no_argument, NULL, 'T'},
{"props-up-to-supernode", no_argument, NULL, 'u'},
{"invert-match", no_argument, NULL, 'v'},
USAGE_COMMON_LONG_OPTS,
};
@ -1016,6 +1028,7 @@ static const char * const usage_opts_help[] = {
"Don't include supernodes of matching nodes",
"Include string table in binary output",
"Include matching aliases in output",
"Add -p properties to supernodes too",
"Invert the sense of matching (select non-matching lines)",
USAGE_COMMON_OPTS_HELP
};
@ -1202,6 +1215,9 @@ static void scan_args(struct display_info *disp, int argc, char *argv[])
case 'T':
disp->add_aliases = 1;
break;
case 'u':
disp->props_up = 1;
break;
case 'v':
disp->invert = 1;
break;