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Based on kernel version 3.3. Page generated on 2012-03-23 21:32 EST.

1	Kernel driver jc42
2	==================
3	
4	Supported chips:
5	  * Analog Devices ADT7408
6	    Prefix: 'adt7408'
7	    Addresses scanned: I2C 0x18 - 0x1f
8	    Datasheets:
9		http://www.analog.com/static/imported-files/data_sheets/ADT7408.pdf
10	  * Atmel AT30TS00
11	    Prefix: 'at30ts00'
12	    Addresses scanned: I2C 0x18 - 0x1f
13	    Datasheets:
14		http://www.atmel.com/Images/doc8585.pdf
15	  * IDT TSE2002B3, TSE2002GB2, TS3000B3, TS3000GB2
16	    Prefix: 'tse2002', 'ts3000'
17	    Addresses scanned: I2C 0x18 - 0x1f
18	    Datasheets:
19		http://www.idt.com/sites/default/files/documents/IDT_TSE2002B3C_DST_20100512_120303152056.pdf
20		http://www.idt.com/sites/default/files/documents/IDT_TSE2002GB2A1_DST_20111107_120303145914.pdf
21		http://www.idt.com/sites/default/files/documents/IDT_TS3000B3A_DST_20101129_120303152013.pdf
22		http://www.idt.com/sites/default/files/documents/IDT_TS3000GB2A1_DST_20111104_120303151012.pdf
23	  * Maxim MAX6604
24	    Prefix: 'max6604'
25	    Addresses scanned: I2C 0x18 - 0x1f
26	    Datasheets:
27		http://datasheets.maxim-ic.com/en/ds/MAX6604.pdf
28	  * Microchip MCP9804, MCP9805, MCP98242, MCP98243, MCP9843
29	    Prefixes: 'mcp9804', 'mcp9805', 'mcp98242', 'mcp98243', 'mcp9843'
30	    Addresses scanned: I2C 0x18 - 0x1f
31	    Datasheets:
32		http://ww1.microchip.com/downloads/en/DeviceDoc/22203C.pdf
33		http://ww1.microchip.com/downloads/en/DeviceDoc/21977b.pdf
34		http://ww1.microchip.com/downloads/en/DeviceDoc/21996a.pdf
35		http://ww1.microchip.com/downloads/en/DeviceDoc/22153c.pdf
36	  * NXP Semiconductors SE97, SE97B
37	    Prefix: 'se97'
38	    Addresses scanned: I2C 0x18 - 0x1f
39	    Datasheets:
40		http://www.nxp.com/documents/data_sheet/SE97.pdf
41		http://www.nxp.com/documents/data_sheet/SE97B.pdf
42	  * NXP Semiconductors SE98
43	    Prefix: 'se98'
44	    Addresses scanned: I2C 0x18 - 0x1f
45	    Datasheets:
46		http://www.nxp.com/documents/data_sheet/SE98.pdf
47	  * ON Semiconductor CAT34TS02, CAT6095
48	    Prefix: 'cat34ts02', 'cat6095'
49	    Addresses scanned: I2C 0x18 - 0x1f
50	    Datasheet:
51		http://www.onsemi.com/pub_link/Collateral/CAT34TS02-D.PDF
52		http://www.onsemi.com/pub/Collateral/CAT6095-D.PDF
53	  * ST Microelectronics STTS424, STTS424E02
54	    Prefix: 'stts424'
55	    Addresses scanned: I2C 0x18 - 0x1f
56	    Datasheets:
57		http://www.st.com/stonline/products/literature/ds/13447/stts424.pdf
58		http://www.st.com/stonline/products/literature/ds/13448/stts424e02.pdf
59	  * ST Microelectronics STTS2002, STTS3000
60	    Prefix: 'stts2002', 'stts3000'
61	    Addresses scanned: I2C 0x18 - 0x1f
62	    Datasheets:
63		http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/CD00225278.pdf
64		http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATA_BRIEF/CD00270920.pdf
65	  * JEDEC JC 42.4 compliant temperature sensor chips
66	    Prefix: 'jc42'
67	    Addresses scanned: I2C 0x18 - 0x1f
68	    Datasheet:
69		http://www.jedec.org/sites/default/files/docs/4_01_04R19.pdf
70	
71	Author:
72		Guenter Roeck <guenter.roeck@ericsson.com>
73	
74	
75	Description
76	-----------
77	
78	This driver implements support for JEDEC JC 42.4 compliant temperature sensors,
79	which are used on many DDR3 memory modules for mobile devices and servers. Some
80	systems use the sensor to prevent memory overheating by automatically throttling
81	the memory controller.
82	
83	The driver auto-detects the chips listed above, but can be manually instantiated
84	to support other JC 42.4 compliant chips.
85	
86	Example: the following will load the driver for a generic JC 42.4 compliant
87	temperature sensor at address 0x18 on I2C bus #1:
88	
89	# modprobe jc42
90	# echo jc42 0x18 > /sys/bus/i2c/devices/i2c-1/new_device
91	
92	A JC 42.4 compliant chip supports a single temperature sensor. Minimum, maximum,
93	and critical temperature can be configured. There are alarms for high, low,
94	and critical thresholds.
95	
96	There is also an hysteresis to control the thresholds for resetting alarms.
97	Per JC 42.4 specification, the hysteresis threshold can be configured to 0, 1.5,
98	3.0, and 6.0 degrees C. Configured hysteresis values will be rounded to those
99	limits. The chip supports only a single register to configure the hysteresis,
100	which applies to all limits. This register can be written by writing into
101	temp1_crit_hyst. Other hysteresis attributes are read-only.
102	
103	If the BIOS has configured the sensor for automatic temperature management, it
104	is likely that it has locked the registers, i.e., that the temperature limits
105	cannot be changed.
106	
107	Sysfs entries
108	-------------
109	
110	temp1_input		Temperature (RO)
111	temp1_min		Minimum temperature (RO or RW)
112	temp1_max		Maximum temperature (RO or RW)
113	temp1_crit		Critical high temperature (RO or RW)
114	
115	temp1_crit_hyst		Critical hysteresis temperature (RO or RW)
116	temp1_max_hyst		Maximum hysteresis temperature (RO)
117	
118	temp1_min_alarm		Temperature low alarm
119	temp1_max_alarm		Temperature high alarm
120	temp1_crit_alarm	Temperature critical alarm
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