1 Kernel driver smsc47m192
2 ========================
3
4 Supported chips:
5
6 * SMSC LPC47M192, LPC47M15x, LPC47M292 and L
7
8 Prefix: 'smsc47m192'
9
10 Addresses scanned: I2C 0x2c - 0x2d
11
12 Datasheet: The datasheet for LPC47M192 is
13
14 http://www.smsc.com/
15
16 The LPC47M15x, LPC47M292 and LP
17
18 hardware monitoring.
19
20
21
22 Author:
23 - Hartmut Rick <linux@rick.claranet.de>
24
25 - Special thanks to Jean Delvare for car
26 of the code and many helpful comments
27
28
29 Description
30 -----------
31
32 This driver implements support for the hardwar
33 of the SMSC LPC47M192 and compatible Super-I/O
34
35 These chips support 3 temperature channels and
36 as well as CPU voltage VID input.
37
38 They do also have fan monitoring and control c
39 these features are accessed via ISA bus and ar
40 driver. Use the 'smsc47m1' driver for fan moni
41
42 Voltages and temperatures are measured by an 8
43 of the temperatures is 1 bit per degree C.
44 Voltages are scaled such that the nominal volt
45 192 counts, i.e. 3/4 of the full range. Thus t
46 each voltage channel is 0V ... 255/192*(nomina
47 is 1 bit per (nominal voltage)/192.
48 Both voltage and temperature values are scaled
49 show voltages in mV and temperatures in units
50
51 The +12V analog voltage input channel (in4_inp
52 bit 4 of the encoded CPU voltage. This means t
53 a +12V voltage measurement or a 5 bit CPU VID,
54 The default setting is to use the pin as 12V i
55 This driver assumes that the information in th
56 is correct, i.e. that the BIOS has updated the
57 the motherboard has this input wired to VID4.
58
59 The temperature and voltage readings are updat
60 Reading them more often repeats the same value
61
62
63 sysfs interface
64 ---------------
65
66 ===================== ========================
67 in0_input +2.5V voltage input
68 in1_input CPU voltage input (nomin
69 in2_input +3.3V voltage input
70 in3_input +5V voltage input
71 in4_input +12V voltage input (may
72 in5_input Vcc voltage input (nomin
73 This is the supply volta
74 in6_input +1.5V voltage input
75 in7_input +1.8V voltage input
76
77 in[0-7]_min,
78 in[0-7]_max lower and upper alarm th
79
80 All voltages are read an
81
82 in[0-7]_alarm alarm flags for voltage
83 These files read '1' in
84
85 temp1_input chip temperature measure
86 temp[2-3]_input temperature measured by
87 would typically be wired
88
89 temp[1-3]_min,
90 temp[1-3]_max lower and upper alarm th
91
92 temp[1-3]_offset temperature offset regis
93 The chip adds the offset
94 the corresponding temper
95 Note that temp1 and temp
96 they cannot both be diff
97 Writing a non-zero numbe
98 offset to zero.
99
100 All temperatures and off
101 units of 0.001 degC.
102
103 temp[1-3]_alarm alarm flags for temperat
104 '0' otherwise.
105 temp[2-3]_input_fault diode fault flags for te
106 A fault is detected if t
107 sensor are open or short
108 to ground or Vcc. '1' in
109
110 cpu0_vid CPU voltage as received
111
112 vrm CPU VID standard used fo
113 ===================== ========================
114
115 The `*_min`, `*_max`, `*_offset` and `vrm` fil
116 all others are read-only.
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.