1 Kernel driver jc42
2 ==================
3
4 Supported chips:
5
6 * Analog Devices ADT7408
7
8 Datasheets:
9
10 https://www.analog.com/static/imported
11
12 * Atmel AT30TS00, AT30TS002A/B, AT30TSE004A
13
14 Datasheets:
15
16 http://www.atmel.com/Images/doc8585.pd
17
18 http://www.atmel.com/Images/doc8711.pd
19
20 http://www.atmel.com/Images/Atmel-8852
21
22 http://www.atmel.com/Images/Atmel-8868
23
24 * IDT TSE2002B3, TSE2002GB2, TSE2004GB2, TS3
25
26 TS3001GB2
27
28 Datasheets:
29
30 Available from IDT web site
31
32 * Maxim MAX6604
33
34 Datasheets:
35
36 http://datasheets.maxim-ic.com/en/ds/M
37
38 * Microchip MCP9804, MCP9805, MCP9808, MCP98
39
40 Datasheets:
41
42 https://ww1.microchip.com/downloads/en
43
44 https://ww1.microchip.com/downloads/en
45
46 https://ww1.microchip.com/downloads/en
47
48 https://ww1.microchip.com/downloads/en
49
50 https://ww1.microchip.com/downloads/en
51
52 https://ww1.microchip.com/downloads/en
53
54 * NXP Semiconductors SE97, SE97B, SE98, SE98
55
56 Datasheets:
57
58 https://www.nxp.com/documents/data_she
59
60 https://www.nxp.com/documents/data_she
61
62 https://www.nxp.com/documents/data_she
63
64 https://www.nxp.com/documents/data_she
65
66 * ON Semiconductor CAT34TS02, CAT6095
67
68 Datasheet:
69
70 https://www.onsemi.com/pub_link/Collat
71
72 https://www.onsemi.com/pub/Collateral/
73
74 * ST Microelectronics STTS424, STTS424E02, S
75
76 Datasheets:
77
78 http://www.st.com/web/en/resource/tech
79
80 http://www.st.com/web/en/resource/tech
81
82 http://www.st.com/web/en/resource/tech
83
84 http://www.st.com/web/en/resource/tech
85
86 http://www.st.com/web/en/resource/tech
87
88 * JEDEC JC 42.4 compliant temperature sensor
89
90 Datasheet:
91
92 http://www.jedec.org/sites/default/fil
93
94
95 Common for all chips:
96
97 Prefix: 'jc42'
98
99 Addresses scanned: I2C 0x18 - 0x1f
100
101 Author:
102 Guenter Roeck <linux@roeck-us.net>
103
104
105 Description
106 -----------
107
108 This driver implements support for JEDEC JC 42
109 which are used on many DDR3 memory modules for
110 systems use the sensor to prevent memory overh
111 the memory controller.
112
113 The driver auto-detects the chips listed above
114 to support other JC 42.4 compliant chips.
115
116 Example: the following will load the driver fo
117 temperature sensor at address 0x18 on I2C bus
118
119 # modprobe jc42
120 # echo jc42 0x18 > /sys/bus/i2c/device
121
122 A JC 42.4 compliant chip supports a single tem
123 and critical temperature can be configured. Th
124 and critical thresholds.
125
126 There is also an hysteresis to control the thr
127 Per JC 42.4 specification, the hysteresis thre
128 3.0, and 6.0 degrees C. Configured hysteresis
129 limits. The chip supports only a single regist
130 which applies to all limits. This register can
131 temp1_crit_hyst. Other hysteresis attributes a
132
133 If the BIOS has configured the sensor for auto
134 is likely that it has locked the registers, i.
135 cannot be changed.
136
137 Sysfs entries
138 -------------
139
140 ======================= ======================
141 temp1_input Temperature (RO)
142 temp1_min Minimum temperature (R
143 temp1_max Maximum temperature (R
144 temp1_crit Critical high temperat
145
146 temp1_crit_hyst Critical hysteresis te
147 temp1_max_hyst Maximum hysteresis tem
148
149 temp1_min_alarm Temperature low alarm
150 temp1_max_alarm Temperature high alarm
151 temp1_crit_alarm Temperature critical a
152 ======================= ======================
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