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aports: add fp6-charging-mode (offline charging, charger-boot detection)

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Charger-insertion boots (androidboot.mode=charger, ABL-appended) divert to
a minimal charging.target instead of the full UI, ending the dead-battery
bootloop: ADSP charging/USB-PD runs, splash+panel killed ~6-10s in via an
initramfs hook, modem+cdsp stopped, radios/sensors suppressed, CPU capped.
Power key reboots to a normal boot, volume-up shows battery status,
volume-down enables USB ssh, unplug powers off. Measured >= breakeven on a
100mA-classified SDP port, strongly net-positive on real chargers.

Suspend duty-cycling (~13mA floor) exists behind an off-by-default flag:
resume from deep suspend intermittently kills the UFS link (hibern8 exit
failed ret=5) - do not enable until that kernel bug is fixed.

Byte-identical to the deployment verified on the dev phone 2026-08-24
(journal/power: r5 armed tests, crash autopsies, measurements).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Jorijn van der Graaf 2026-08-24 04:03:06 +02:00
commit eb13c18ea8
12 changed files with 507 additions and 1 deletions
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9
aports/device/fp6-charging-mode/charging-keys.service Normal file
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[Unit]
Description=Charging-mode key handler (volume-down enables ssh)
# Only ever pulled by charging.target.
[Service]
Type=exec
ExecStart=/usr/lib/charging-mode/charging-keys.sh
Restart=on-failure
RestartSec=5