• Hans de Goede's avatar
    platform/x86: thinkpad_acpi: Add BAT1 is primary battery quirk for Thinkpad Yoga 11e 4th gen · 3cd420b2
    Hans de Goede authored
    The Thinkpad Yoga 11e 4th gen with the N3450 / Celeron CPU only has
    one battery which is named BAT1 instead of the expected BAT0, add a
    quirk for this. This fixes not being able to set the charging tresholds
    on this model; and this alsoe fixes the following errors in dmesg:
    
    ACPI: \_SB_.PCI0.LPCB.EC__.HKEY: BCTG evaluated but flagged as error
    thinkpad_acpi: Error probing battery 2
    battery: extension failed to load: ThinkPad Battery Extension
    battery: extension unregistered: ThinkPad Battery Extension
    
    Note that the added quirk is for the "R0K" BIOS versions which are
    used on the Thinkpad Yoga 11e 4th gen's with a Celeron CPU, there
    is a separate "R0L" BIOS for the i3/i5 based versions. This may also
    need the same quirk, but if that really is necessary is unknown.
    Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
    Link: https://lore.kernel.org/r/20201109103550.16265-1-hdegoede@redhat.com
    3cd420b2
thinkpad_acpi.c 270 KB