/* All-zero MAC addresses are rejected, because those could be properties that exist in the device tree, but were not set by U-Boot. For example, the DTS could define 'mac-address' and 'local-mac-address', with zero MAC addresses. Some older U-Boots only initialized 'local-mac-address'. In this case, the real MAC is in 'local-mac-address', and 'mac-address' exists but is all zeros.  */
const void* of_get_mac_address(struct device_node *np)
/* All-zero MAC addresses are rejected, because those could be properties that exist in the device tree, but were not set by U-Boot. For example, the DTS could define 'mac-address' and 'local-mac-address', with zero MAC addresses. Some older U-Boots only initialized 'local-mac-address'. In this case, the real MAC is in 'local-mac-address', and 'mac-address' exists but is all zeros.  */
const void* of_get_mac_address(struct device_node *np)
{
	struct property *pp;
	pp = of_find_property(np, "mac-address", NULL);
	if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
		return pp->value;
	pp = of_find_property(np, "local-mac-address", NULL);
	if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
		return pp->value;
	pp = of_find_property(np, "address", NULL);
	if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
		return pp->value;
	return NULL;
}