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Based on kernel version 3.15.4. Page generated on 2014-07-07 09:03 EST.

1	Kernel driver ds620
2	===================
3	
4	Supported chips:
5	  * Dallas Semiconductor DS620
6	    Prefix: 'ds620'
7	    Datasheet: Publicly available at the Dallas Semiconductor website
8	               http://www.dalsemi.com/
9	
10	Authors:
11	        Roland Stigge <stigge@antcom.de>
12	        based on ds1621.c by
13	        Christian W. Zuckschwerdt <zany@triq.net>
14	
15	Description
16	-----------
17	
18	The DS620 is a (one instance) digital thermometer and thermostat. It has both
19	high and low temperature limits which can be user defined (i.e.  programmed
20	into non-volatile on-chip registers). Temperature range is -55 degree Celsius
21	to +125. Between 0 and 70 degree Celsius, accuracy is 0.5 Kelvin. The value
22	returned via sysfs displays post decimal positions.
23	
24	The thermostat function works as follows: When configured via platform_data
25	(struct ds620_platform_data) .pomode == 0 (default), the thermostat output pin
26	PO is always low. If .pomode == 1, the thermostat is in PO_LOW mode. I.e., the
27	output pin PO becomes active when the temperature falls below temp1_min and
28	stays active until the temperature goes above temp1_max.
29	
30	Likewise, with .pomode == 2, the thermostat is in PO_HIGH mode. I.e., the PO
31	output pin becomes active when the temperature goes above temp1_max and stays
32	active until the temperature falls below temp1_min.
33	
34	The PO output pin of the DS620 operates active-low.
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