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| author | lan,Tianyu <tianyu.lan@intel.com> | 2014-11-03 01:53:01 -0800 |
|---|---|---|
| committer | Eduardo Valentin <edubezval@gmail.com> | 2014-11-04 19:17:32 -0400 |
| commit | 225112a56942c74f1e114587719fa2bd0d180b3e (patch) | |
| tree | ad777dfc70d02672c86d67883aced13c5614a4d2 /drivers/thermal | |
| parent | a1cff6e25e6e3b55183610dddca91546951b20e3 (diff) | |
| download | lwn-225112a56942c74f1e114587719fa2bd0d180b3e.tar.gz lwn-225112a56942c74f1e114587719fa2bd0d180b3e.zip | |
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>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/int340x_thermal/int3403_thermal.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/thermal/int340x_thermal/int3403_thermal.c b/drivers/thermal/int340x_thermal/int3403_thermal.c index d20dba986f0f..6e9fb62eb817 100644 --- a/drivers/thermal/int340x_thermal/int3403_thermal.c +++ b/drivers/thermal/int340x_thermal/int3403_thermal.c @@ -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; } |