The MAC addresses get fixed in the device tree for "ethernet" nodes is by using trailing number behind "ethernet" found in "/aliases". It may not be necessary for the "ethernet" nodes to be sequential. There can be gaps in between or any node disabled
So provide a support to fetch MAC addr sequentially from env and apply them to "ethernet" nodes in the order they appear in device tree only if "ethernet" is not "disabled"
Signed-off-by: Prabhakar Kushwaha prabhakar.kushwaha@nxp.com --- Changes for v2: Updated description and README Changes for v3: sending as it is
README | 9 +++++++++ common/fdt_support.c | 25 +++++++++++++++++++++---- 2 files changed, 30 insertions(+), 4 deletions(-)
diff --git a/README b/README index 7a4f342..15310a2 100644 --- a/README +++ b/README @@ -1603,6 +1603,15 @@ The following options need to be configured:
See doc/README.link-local for more information.
+ - MAC address from environment variables + + FDT_SEQ_MACADDR_FROM_ENV + + Fix-up device tree with MAC addresses fetched sequentially from + environment variables. This config work on assumption that + non-usable ethernet node of device-tree are either not present + or their status has been marked as "disabled". + - CDP Options: CONFIG_CDP_DEVICE_ID
diff --git a/common/fdt_support.c b/common/fdt_support.c index f4f9543..43ca8db 100644 --- a/common/fdt_support.c +++ b/common/fdt_support.c @@ -469,12 +469,16 @@ int fdt_fixup_memory(void *blob, u64 start, u64 size)
void fdt_fixup_ethernet(void *fdt) { - int i, j, prop; + int i = 0, j, prop; char *tmp, *end; char mac[16]; const char *path; unsigned char mac_addr[ARP_HLEN]; int offset; +#ifdef FDT_SEQ_MACADDR_FROM_ENV + int nodeoff; + const struct fdt_property *fdt_prop; +#endif
if (fdt_path_offset(fdt, "/aliases") < 0) return; @@ -487,7 +491,7 @@ void fdt_fixup_ethernet(void *fdt) offset = fdt_first_property_offset(fdt, fdt_path_offset(fdt, "/aliases")); /* Select property number 'prop' */ - for (i = 0; i < prop; i++) + for (j = 0; j < prop; j++) offset = fdt_next_property_offset(fdt, offset);
if (offset < 0) @@ -496,11 +500,16 @@ void fdt_fixup_ethernet(void *fdt) path = fdt_getprop_by_offset(fdt, offset, &name, NULL); if (!strncmp(name, "ethernet", 8)) { /* Treat plain "ethernet" same as "ethernet0". */ - if (!strcmp(name, "ethernet")) + if (!strcmp(name, "ethernet") +#ifdef FDT_SEQ_MACADDR_FROM_ENV + || !strcmp(name, "ethernet0") +#endif + ) i = 0; +#ifndef FDT_SEQ_MACADDR_FROM_ENV else i = trailing_strtol(name); - +#endif if (i != -1) { if (i == 0) strcpy(mac, "ethaddr"); @@ -509,6 +518,14 @@ void fdt_fixup_ethernet(void *fdt) } else { continue; } +#ifdef FDT_SEQ_MACADDR_FROM_ENV + nodeoff = fdt_path_offset(fdt, path); + fdt_prop = fdt_get_property(fdt, nodeoff, "status", + NULL); + if (fdt_prop && !strcmp(fdt_prop->data, "disabled")) + continue; + i++; +#endif tmp = env_get(mac); if (!tmp) continue;