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: Lan Tianyu <tianyu.lan@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

diff --git a/drivers/thermal/int3403_thermal.c b/drivers/thermal/int3403_thermal.c
index 1301681d9a7792904324167300cdaca6a7b948b0..e93f0253f6ed2070c934570cbe5c62f400bdfcc1 100644 (file)
--- a/drivers/thermal/int3403_thermal.c
+++ b/drivers/thermal/int3403_thermal.c
@@ -62,7 +62,13 @@ 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;
 }