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Based on kernel version 4.13.3. Page generated on 2017-09-23 13:55 EST.

1	Kernel driver lm70
2	==================
3	
4	Supported chips:
5	  * National Semiconductor LM70
6	    Datasheet: http://www.national.com/pf/LM/LM70.html
7	  * Texas Instruments TMP121/TMP123
8	    Information: http://focus.ti.com/docs/prod/folders/print/tmp121.html
9	  * Texas Instruments TMP122/TMP124
10	    Information: http://www.ti.com/product/tmp122
11	  * National Semiconductor LM71
12	    Datasheet: http://www.ti.com/product/LM71
13	  * National Semiconductor LM74
14	    Datasheet: http://www.ti.com/product/LM74
15	
16	Author:
17	        Kaiwan N Billimoria <kaiwan@designergraphix.com>
18	
19	Description
20	-----------
21	
22	This driver implements support for the National Semiconductor LM70
23	temperature sensor.
24	
25	The LM70 temperature sensor chip supports a single temperature sensor.
26	It communicates with a host processor (or microcontroller) via an
27	SPI/Microwire Bus interface.
28	
29	Communication with the LM70 is simple: when the temperature is to be sensed,
30	the driver accesses the LM70 using SPI communication: 16 SCLK cycles
31	comprise the MOSI/MISO loop. At the end of the transfer, the 11-bit 2's
32	complement digital temperature (sent via the SIO line), is available in the
33	driver for interpretation. This driver makes use of the kernel's in-core
34	SPI support.
35	
36	As a real (in-tree) example of this "SPI protocol driver" interfacing
37	with a "SPI master controller driver", see drivers/spi/spi_lm70llp.c
38	and its associated documentation.
39	
40	The LM74 and TMP121/TMP122/TMP123/TMP124 are very similar; main difference is
41	13-bit temperature data (0.0625 degrees celsius resolution).
42	
43	The TMP122/TMP124 also feature configurable temperature thresholds.
44	
45	The LM71 is also very similar; main difference is 14-bit temperature
46	data (0.03125 degrees celsius resolution).
47	
48	Thanks to
49	---------
50	Jean Delvare <jdelvare@suse.de> for mentoring the hwmon-side driver
51	development.
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