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rk3399: r4s: Derive local MAC address if EEPROM is missing

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Some RK3399 boards, such as newer revisions of NanoPi R4S, do not
provide an EEPROM chip containing a globally unique MAC address.

Currently, this means that a randomly generated temporary MAC address
may be generated each time the device is rebooted, leading to ARP cache
issues and other confusing bugs.

Since RK3399 CPUs provide a built-in unique serial number, we can
reliably derive a locally MAC address from it by reading the
corresponding bits from the non-secure efuse block.

Enable configuration options that allow deriving a local MAC address
from the CPU serial number.
This commit is contained in:
Christian Kohlschütter 2022-09-27 15:05:21 +00:00 committed by Kever Yang
parent 53c5093b2e
commit c2d5edff91
1 changed files with 4 additions and 0 deletions
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4
configs/nanopi-r4s-rk3399_defconfig
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@ -78,3 +78,7 @@ CONFIG_VIDEO_ROCKCHIP=y
CONFIG_DISPLAY_ROCKCHIP_HDMI=y
CONFIG_SPL_TINY_MEMSET=y
CONFIG_ERRNO_STR=y
CONFIG_MISC=y
CONFIG_MISC_INIT_R=y
CONFIG_ROCKCHIP_EFUSE=y
CONFIG_ROCKCHIP_OTP=y