1 Kernel driver w83793
2 ====================
3
4 Supported chips:
5
6 * Winbond W83793G/W83793R
7
8 Prefix: 'w83793'
9
10 Addresses scanned: I2C 0x2c - 0x2f
11
12 Datasheet: Still not published
13
14 Authors:
15 - Yuan Mu (Winbond Electronics)
16 - Rudolf Marek <r.marek@assembler.cz>
17
18
19 Module parameters
20 -----------------
21
22 * reset int
23 (default 0)
24
25 This parameter is not recommended, it will
26 settings. Use 'reset=1' to reset the chip
27
28 * force_subclients=bus,caddr,saddr1,saddr2
29 This is used to force the i2c addresses fo
30 a certain chip. Typical usage is `force_su
31 to force the subclients of chip 0x2f on bu
32 0x4a and 0x4b.
33
34
35 Description
36 -----------
37
38 This driver implements support for Winbond W83
39
40 * Exported features
41 This driver exports 10 voltage sensors, up
42 6 remote temperatures, up to 8 sets of PWM
43 (automatic fan speed control) on all tempe
44 sets of 6-pin CPU VID input.
45
46 * Sensor resolutions
47 If your motherboard maker used the referen
48 voltage0-2 is 2mV, resolution of voltage3/
49 24mV for voltage7/8. Temp1-4 have a 0.25 d
50 temp5-6 have a 1 degree Celsiis resolution
51
52 * Temperature sensor types
53 Temp1-4 have 2 possible types. It can be r
54 temp[1-4]_type.
55
56 - If the value is 3, it starts monitoring
57 (default).
58 - If the value is 6, it starts monitoring
59 in Intel CPU and get result by PECI.
60
61 Temp5-6 can be connected to external therm
62 temp[5-6]_type is 4).
63
64 * Alarm mechanism
65 For voltage sensors, an alarm triggers if
66 the low voltage limit or over the high vol
67 For temperature sensors, an alarm triggers
68 above the high temperature limit, and wear
69 value drops below the hysteresis value.
70 For fan sensors, an alarm triggers if the
71 low speed limit.
72
73 * SmartFan/PWM control
74 If you want to set a pwm fan to manual mod
75 is not controlled by any temp channel, for
76 to manual mode, you need to check the valu
77 sure bit 0 is cleared in the 6 values. And
78 control the fan.
79
80 Each temperature channel can control all t
81 corresponding bit in tempX_fan_map), you c
82 mode using temp[1-6]_pwm_enable, 2 is Ther
83 is the SmartFanII mode. Temperature channe
84 slow down all controlled fans, this means
85 PWM value requests from different temperat
86 will always pick the safest (max) PWM valu
87
88 In Thermal Cruise mode, the chip attempts
89 predefined value, within a tolerance margi
90 thermal_cruiseX + toleranceX, the chip wil
91 if tempX_input < thermal_cruiseX - toleran
92 the PWM value. If the temperature is withi
93 value is left unchanged.
94
95 SmartFanII works differently, you have to
96 trip points, defining a PWM/temperature cu
97 While not fundamentally different from the
98 implementation is quite different, giving
99
100 * Chassis
101 If the case open alarm triggers, it will s
102 by writing 0 to the sysfs file "intrusion0
103
104 * VID and VRM
105 The VRM version is detected automatically,
106 *do* know the cpu VRM version and it's not
107
108
109 Notes
110 -----
111
112 Only Fan1-5 and PWM1-3 are guaranteed to alw
113 PWM outputs may or may not exist depending o
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.