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* docs(mochabin): add EP06 mPCIe GPIO investigation runbook (ref #345) scripts/probe-mpcie-gpios.sh: empirical CP0 GPIO sweep that drives each unrequested line HIGH for a few seconds and watches dmesg/lsusb for new USB device. Skips [used] lines, uses libgpiod gpioset --mode=time so the line auto-restores to input on release. Modes: --baseline (snapshot only, safe), --line gpiochipN K (single line), no arg (full sweep gpiochip1+gpiochip2). docs/hardware/mochabin-mpcie-ep06-runbook.md: hypothesis, procedure, and DTS rfkill-gpio template patterned after cn9132-clearfog.dts lines 69-122. Apply once a candidate GPIO is identified. --baseline smoke-tested on gk2 — sweep deferred until spare EP06 arrives (no mPCIe device in J5 = no signal regardless of which line drives W_DISABLE#). * docs(mochabin): drop EP06 spare assumption from runbook (ref #345) No spare EP06 on order; the existing EP06-E will be used for the sweep when re-seated in J5. Replaces "deferred until spare" framing with a multimeter-scoping fallback for the inconclusive case. * fix(mpcie): v0.2.0 probe-mpcie-gpios.sh — drop blanket sweep, danger-list, dry-run default (ref #345) The v0.1.0 "drive every unused-input CP0 GPIO HIGH for 3s one-at-a-time" sweep took gk2 hard-down within seconds (host became unreachable; ARP stopped responding). gpioinfo's [used] tag only reflects lines the kernel *requested* — several unrequested CP0 GPIOs are physically wired to critical board functions (eth switch reset, PCIe2 PERST#, pca9554 IRQ) and driving them HIGH wedged the board. v0.2.0: - No blanket-sweep mode. Removed. - Default mode = dry-run candidate listing only. No GPIO is driven. - --commit --line CHIP N required to actually drive a single line. - Hardcoded DANGER_LINES (gpiochip1:1, gpiochip1:9, gpiochip1:27) skipped unconditionally, even with --commit. - gpiochip2 entirely held off without --allow-chip2 (no per-line schematic mapping for that bank). - Hard refusals are vocal (REFUSED: ... reason) before exit. Runbook updated to walk through the new dry-run → --commit flow. HISTORY documents the incident + the v0.2.0 mitigations. Lesson saved in memory feedback_gpio_blanket_sweep_crashed_board.md. --------- Co-authored-by: CyberMind-FR <gandalf@Gk2.net> |
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| smart-strip | ||
| mochabin-mpcie-ep06-runbook.md | ||
| smart-strip-v1.1.md | ||