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-rw-r--r--src/ec/lenovo/h8/acpi/battery.asl29
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))