Mirrors/m1n1
2
0
Fork 0
mirror of https://github.com/AsahiLinux/m1n1 synced 2024-11-27 08:50:17 +00:00
Code Issues Projects Releases Packages Wiki Activity

kboot: Provide MAC addresses in device tree

Browse source 
Read the MAC addresses from the ADT and store them in
"local-mac-address" properties on the relevant nodes in the FDT.
This relies on appropriate aliases in the provided FDT, which
matches how U-Boot provides MAC addresses on embedded targets.

Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
This commit is contained in:
Mark Kettenis 2021-06-11 11:57:18 +02:00 committed by Hector Martin
parent e833e3c052
commit d33d7ba89d
1 changed files with 37 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

37
src/kboot.c
View file

@ -244,6 +244,41 @@ static int dt_set_cpus(void)
return 0;
}
static const char *aliases[] = {
"bluetooth0",
"ethernet0",
"wifi0",
};
static int dt_set_mac_addresses(void)
{
int anode = adt_path_offset(adt, "/chosen");
if (anode < 0)
bail("ADT: /chosen not found\n");
for (size_t i = 0; i < sizeof(aliases) / sizeof(*aliases); i++) {
char propname[32];
sprintf(propname, "mac-address-%s", aliases[i]);
uint8_t addr[6];
if (ADT_GETPROP_ARRAY(adt, anode, propname, addr) < 0)
continue;
const char *path = fdt_get_alias(dt, aliases[i]);
if (path == NULL)
continue;
int node = fdt_path_offset(dt, path);
if (node < 0)
continue;
fdt_setprop(dt, node, "local-mac-address", addr, sizeof(addr));
}
return 0;
}
void kboot_set_initrd(void *start, size_t size)
{
initrd_start = start;
@ -292,6 +327,8 @@ int kboot_prepare_dt(void *fdt)
return -1;
if (dt_set_cpus())
return -1;
if (dt_set_mac_addresses())
return -1;
if (fdt_pack(dt))
bail("FDT: fdt_pack() failed\n");