[PATCH v2 2/2] i.MX: HAB: update text for HABV4_CSF_UNLOCK_UID

Fabian Pflug
2026-04-15T11:11:01Z

With the establishment of global.soc_uid_hex, there is no need to look
for the serial number and reverse it.

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..cb77d0d5b6 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:
+ stored in $global.soc_uid_hex, but must be split into bytes.
+ The soc_uid_hex 0011223344556677 becomes:
- 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77

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

--
2.47.3