1 Kernel driver gl518sm
2 =====================
3
4 Supported chips:
5
6 * Genesys Logic GL518SM release 0x00
7
8 Prefix: 'gl518sm'
9
10 Addresses scanned: I2C 0x2c and 0x2d
11
12 * Genesys Logic GL518SM release 0x80
13
14 Prefix: 'gl518sm'
15
16 Addresses scanned: I2C 0x2c and 0x2d
17
18 Datasheet: http://www.genesyslogic.com/
19
20 Authors:
21 - Frodo Looijaard <frodol@dds.nl>,
22 - Kyösti Mälkki <kmalkki@cc.hut.fi>
23 - Hong-Gunn Chew <hglinux@gunnet.org>
24 - Jean Delvare <jdelvare@suse.de>
25
26 Description
27 -----------
28
29 .. important::
30
31 For the revision 0x00 chip, the in0, in1, a
32 and +12V) CANNOT be read. This is a limitat
33
34 This driver supports the Genesys Logic GL518SM
35 two revision of this chip, which we call revis
36 0x80 chips support the reading of all voltages
37 for VIN3.
38
39 The GL518SM implements one temperature sensor,
40 sensors, and four voltage sensors. It can repo
41 computer speakers.
42
43 Temperatures are measured in degrees Celsius.
44 temperature is above the over temperature limi
45 below the hysteresis limit. The alarm always r
46 situation. Measurements are guaranteed between
47 degrees, with a accuracy of +/-3 degrees.
48
49 Rotation speeds are reported in RPM (rotations
50 triggered if the rotation speed has dropped be
51 case when you have selected to turn fan1 off,
52
53 Fan readings can be divided by a programmable
54 give the readings more range or accuracy. Not
55 accurately be represented, so some rounding is
56 of 2, the lowest representable value is around
57
58 Voltage sensors (also known as VIN sensors) re
59 An alarm is triggered if the voltage has cross
60 maximum limit. Note that minimum in this case
61 zero'; this is important for negative voltage
62 measures voltages between 0.000 and 5.865 volt
63 volt. The other inputs measure voltages betwee
64 a resolution of 0.019 volt. Note that revision
65 reading the current voltage of any input excep
66 alarms work fine, though.
67
68 When an alarm is triggered, you can be warned
69 computer speaker. It is possible to enable all
70 beeping for some alarms.
71
72 If an alarm triggers, it will remain triggered
73 is read at least once (except for temperature
74 cause for the alarm may already have disappear
75 implementation, all hardware registers are rea
76 (unless it is less than 1.5 seconds since the
77 you can easily miss once-only alarms.
78
79 The GL518SM only updates its values each 1.5 s
80 will do no harm, but will return 'old' values.
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