Store serial number from atsha cryptochip into the serial# env variable.
U-Boot automatically puts content of this variable into the root device
tree property serial-number when booting Linux kernel. Refactor turris
atsha code and from turris_atsha_otp_get_serial_number() function returns
directly string suitable for printing or storing into device tree. Because
during different boot stages is env storage read-only, it is not possible
to always store serial number into env storage. So introduce a new function
turris_atsha_otp_init_serial_number() which is called at later stage and
which ensures that serial number is correctly stored into env.
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Marek Behún <kabel@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
Turris Omnia uses first MAC address from OTP for second ethernet interface.
Second MAC address for third interface and third MAC address for first
interface.
Other Turris routers do not have this rotate by one mapping. So add
function parameter for specifying id of the first ethernet interface.
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
OTP code is not Atsha generic but also it is not Omnia specific. It is
common for all Turris routers which use Atsha cryptochip for storing OTP.
So move this common Turris specific Atsha OTP code from Turris Omnia into
separate file. It will be used also by other Turris routers.
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
