[U-Boot] [PATCH v2 2/3] imx: mx7: Add comment to describe OTP TESTER registers

[Fabio Estevam]

On Tue, Mar 13, 2018 at 12:48 PM, Bryan O'Donoghue
<bryan.odonoghue at 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 at linaro.org>
> Cc: Fabio Estevam <fabio.estevam at nxp.com>
> Cc: Peng Fan <peng.fan at nxp.com>
> Cc: Stefano Babic <sbabic at denx.de>

Reviewed-by: Fabio Estevam <fabio.estevam at nxp.com>