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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/hwmon/ds620.rst | |
parent | Initial commit. (diff) | |
download | linux-upstream/5.10.209.tar.xz linux-upstream/5.10.209.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | Documentation/hwmon/ds620.rst | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/Documentation/hwmon/ds620.rst b/Documentation/hwmon/ds620.rst new file mode 100644 index 000000000..2d686b17b --- /dev/null +++ b/Documentation/hwmon/ds620.rst @@ -0,0 +1,38 @@ +Kernel driver ds620 +=================== + +Supported chips: + + * Dallas Semiconductor DS620 + + Prefix: 'ds620' + + Datasheet: Publicly available at the Dallas Semiconductor website + + http://www.dalsemi.com/ + +Authors: + Roland Stigge <stigge@antcom.de> + based on ds1621.c by + Christian W. Zuckschwerdt <zany@triq.net> + +Description +----------- + +The DS620 is a (one instance) digital thermometer and thermostat. It has both +high and low temperature limits which can be user defined (i.e. programmed +into non-volatile on-chip registers). Temperature range is -55 degree Celsius +to +125. Between 0 and 70 degree Celsius, accuracy is 0.5 Kelvin. The value +returned via sysfs displays post decimal positions. + +The thermostat function works as follows: When configured via platform_data +(struct ds620_platform_data) .pomode == 0 (default), the thermostat output pin +PO is always low. If .pomode == 1, the thermostat is in PO_LOW mode. I.e., the +output pin PO becomes active when the temperature falls below temp1_min and +stays active until the temperature goes above temp1_max. + +Likewise, with .pomode == 2, the thermostat is in PO_HIGH mode. I.e., the PO +output pin becomes active when the temperature goes above temp1_max and stays +active until the temperature falls below temp1_min. + +The PO output pin of the DS620 operates active-low. |