tps6598x-source-psy keeps POWER_SUPPLY_ONLINE=1 after charger unplug

[DerAlbertCom]

Machine

Apple MacBook Air (13-inch, M2, 2022)

Kernel

7.1.13-3-1-ARCH (Asahi)

What happens

After charging to 100% and unplugging the charger, one USB-C PD port keeps reporting that it is online / sourcing, indefinitely:

/sys/class/power_supply/tps6598x-source-psy-0-0038:  POWER_SUPPLY_ONLINE=1   (stale, charger unplugged)
/sys/class/power_supply/macsmc-ac:                   POWER_SUPPLY_ONLINE=0
/sys/class/power_supply/macsmc-battery:              status=Discharging, current_now=-334000

No USB device is attached to that port, so the source state should be idle. The battery is genuinely discharging, which makes the online=1 stale state in the CD321x/tps6598x path rather than real sourcing.

Impact

UPower enumerates these USB power supplies as line-power devices; the stale online=1 keeps the daemon's on-battery flag false, so desktops (e.g. GNOME, Omarchy's Quickshell shell) show "charging"/AC state while the battery drains. Low-battery logic keyed on on-battery also breaks.

Steps to reproduce

Charge to 100%, unplug the charger, then check /sys/class/power_supply/tps6598x-source-psy-*/online.