Commit 225112a5 authored by lan,Tianyu's avatar lan,Tianyu Committed by Eduardo Valentin

Thermal/int3403: Fix thermal hysteresis unit conversion

Thermal hysteresis represents a temperature difference.
But the original code treats it as a temperature value,
Convert it from tenths of degree Kelvin to Milli-Celsius
by deducing 273200. This is not right.

Kelvin and Celsius have same degree size. From temperature
difference view, the conversion between tenths of degree
Kelvin unit and Milli-Celsius unit is just to multiply 100.
Signed-off-by: default avatarLan Tianyu <tianyu.lan@intel.com>
Acked-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: default avatarZhang Rui <rui.zhang@intel.com>
Signed-off-by: default avatarEduardo Valentin <edubezval@gmail.com>
parent a1cff6e2
......@@ -92,7 +92,13 @@ static int sys_get_trip_hyst(struct thermal_zone_device *tzone,
if (ACPI_FAILURE(status))
return -EIO;
*temp = DECI_KELVIN_TO_MILLI_CELSIUS(hyst, KELVIN_OFFSET);
/*
* Thermal hysteresis represents a temperature difference.
* Kelvin and Celsius have same degree size. So the
* conversion here between tenths of degree Kelvin unit
* and Milli-Celsius unit is just to multiply 100.
*/
*temp = hyst * 100;
return 0;
}
......
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