diff options
Diffstat (limited to 'src/ec/lenovo/h8/acpi/battery.asl')
| -rw-r--r-- | src/ec/lenovo/h8/acpi/battery.asl | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/src/ec/lenovo/h8/acpi/battery.asl b/src/ec/lenovo/h8/acpi/battery.asl index 0ebc9eea9d..fef994a1d6 100644 --- a/src/ec/lenovo/h8/acpi/battery.asl +++ b/src/ec/lenovo/h8/acpi/battery.asl @@ -97,21 +97,36 @@ Method(BSTA, 4, NotSerialized) Store(BAMA, Local1) Store(Arg0, PAGE) /* Battery dynamic information */ + /* + * Present rate is a 16bit signed int, positive while charging + * and negative while discharging. + */ Store(BAPR, Local2) - if (Arg2) // charging + If (Arg2) // Charging { Or(2, Local0, Local0) - - If (LGreaterEqual (Local2, 0x8000)) { + } + Else + { + If (Arg3) // Discharging + { + Or(1, Local0, Local0) + // Negate present rate + Subtract(0x10000, Local2, Local2) + } + Else // Full battery, force to 0 + { Store(0, Local2) } } - if (Arg3) // discharging - { - Or(1, Local0, Local0) - Subtract(0x10000, Local2, Local2) + /* + * The present rate value must be positive now, if it is not we have an + * EC bug or inconsistency and force the value to 0. + */ + If (LGreaterEqual (Local2, 0x8000)) { + Store(0, Local2) } Store(Local0, Index(Arg1, 0x00)) |