Re: [PATCH 2/2] i.MX: HAB: update text for HABV4_CSF_UNLOCK_UID

[Jonas Rebmann <jre@pengutronix.de>]

On 2026-03-30 14:24, Fabian Pflug wrote:
> With the establishment of global.soc_uid_bin, there is no need to look
> for the serial number and reverse it.

I don't believe reverting the byte order manually is something we were
supposed to be doing before.

> Also some SoC's will have 128-bit UID's, so the hint to 64 bit is not
> correct and should be removed.
> 
> Signed-off-by: Fabian Pflug <f.pflug@pengutronix.de>
> ---
>   arch/arm/mach-imx/Kconfig | 11 +++--------
>   1 file changed, 3 insertions(+), 8 deletions(-)
> 
> diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
> index 2e4d1ac80a..bfcb6ae402 100644
> --- a/arch/arm/mach-imx/Kconfig
> +++ b/arch/arm/mach-imx/Kconfig
> @@ -918,17 +918,12 @@ config HABV4_CSF_UNLOCK_UID
>   	depends on HABV4 && HABV4_CSF_UNLOCK_FIELD_RETURN
>   	string "CSF Unlock UID"
>   	help
> -	  Device specific 64-bit UID required to unlock the field-return
> +	  Device specific UID required to unlock the field-return
>   	  feature. This value must match the per device UNIQUE_ID fuses.
>   
>   	  The below example shows the expected format. The UNIQUE_ID is
> -	  printed during boot by barebox:
> -	    i.MX___ unique ID: 7766554433221100
> -	  or it can be queried by Linux via:
> -	    - cat /sys/devices/soc0/serial_number
> -	      7766554433221100
> -
> -	  So this value have to be set:
> +	  is stored in $global.soc_uid_bin, but must be split into bytes.

"The UNIQUE_ID is is stored"?

> +	  The soc_uid_bin 0011223344556677 becomes:
>   	    - 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77

I never used this feature but is there any good reason why this should
consume a different format from what $global.soc_uid_bin returns?

>   	  Afterwards, the `hab -p -r` command can be used to burn the fuse.
> 

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