13 Mar
2018
13 Mar
'18
4:53 p.m.
On Tue, Mar 13, 2018 at 12:48 PM, Bryan O'Donoghue bryan.odonoghue@linaro.org wrote:
The tester registers provide a unique chip-level identifier which get_board_serial() returns in a "struct tag_serialnr".
This patch documents the properties of the registers; in summary.
31:0 OCOTP_TESTER0 (most significant)
- FSL-wide unique, encoded LOT ID STD II/SJC CHALLENGE/ Unique ID
OCOTP_TESTER1 (least significant) 31:24
- The X-coordinate of the die location on the wafer/SJC CHALLENGE/ Unique ID
23:16
- The Y-coordinate of the die location on the wafer/SJC CHALLENGE/ Unique ID
15:11
- The wafer number of the wafer on which the device was fabricated/SJC CHALLENGE/ Unique ID
10:0
- FSL-wide unique, encoded LOT ID STD II/SJC CHALLENGE/ Unique ID
The 64 bits of data generate a unique serial number per-chip.
Signed-off-by: Bryan O'Donoghue bryan.odonoghue@linaro.org Cc: Fabio Estevam fabio.estevam@nxp.com Cc: Peng Fan peng.fan@nxp.com Cc: Stefano Babic sbabic@denx.de
Reviewed-by: Fabio Estevam fabio.estevam@nxp.com