ACPI / battery: fix wrong value of capacity_now reported when fully charged

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It seems that some batteries (noticed on DELL JYPJ136) assume
capacity_now = design_capacity when fully charged. This causes
reported capacity to suddenly jump to >full_charge_capacity (and that
means capacity reported to userspace is >100% and incorrect)
values after 99%. This patch detects capacity_now > full_charge_capacity,
notifies userspace (unless it is the known bug where capacity_now ==
design_capacity) and trims the value to full_charge_capacity.

Signed-off-by: Josef Gajdusek <atx@atx.name>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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Josef Gajdusek 2014-06-17 23:15:49 +02:00 • committed by Rafael J. Wysocki

parent 75646e758a

commit 232de51437

1 changed files with 14 additions and 0 deletions

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drivers/acpi/battery.c

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