currently perusing the kernel code for device tree processing and
stumbled across this in drivers/of/base.c:
void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align))
{
struct property *pp;
of_aliases = of_find_node_by_path("/aliases");
of_chosen = of_find_node_by_path("/chosen");
if (of_chosen == NULL)
of_chosen = of_find_node_by_path("/chosen@0"); ?
if (of_chosen) {
... snip ...
that pretty clearly says that "/chosen@0" is an equivalent node name
for "/chosen", correct? but why was that equivalence first defined?
if i scan the entire kernel source tree, this is all i get:
$ grep -r "/chosen@0" *
arch/powerpc/boot/oflib.c: chosen = of_finddevice("/chosen@0");
drivers/of/base.c: of_chosen = of_find_node_by_path("/chosen@0");
drivers/of/fdt.c: offset = fdt_path_offset(fdt, "/chosen@0");
$
so there are apparently three files that *check* for that alternate
name, but not a single .dts or .dtsi that actually uses it. is there
any value to that alternate name?
rday
--
Robert P. J. Day Ottawa, Ontario, CANADA
http://crashcourse.ca
Twitter: http://twitter.com/rpjday
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