Hi Tien Fong,

On Thu, 15 Oct 2026 12:36:00 +0800, Chee, Tien Fong
<[email protected]> wrote:

> QSPI-sourced calibration restore: trust boundary with fail-closed checks
>
> Please document trust model (sysmgr retention bit + flash integrity) in
> cover or binding; keep fail-closed

Fixed in v4. Documented the trust model in
doc/device-tree-bindings/ram/intel,sdr-ctl-n5x.txt.
Skip-calibrate is gated by the System Manager retention bit (and
reset type); the QSPI backup stays untrusted until magic / bounds /
CRC32 / SHA384 checks pass. On any failure the path stays fail-closed
and forces a full PHY recalibration.

Thanks,
Lok

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