Root/
1 | Kernel driver f71882fg |
2 | ====================== |
3 | |
4 | Supported chips: |
5 | * Fintek F71808E |
6 | Prefix: 'f71808e' |
7 | Addresses scanned: none, address read from Super I/O config space |
8 | Datasheet: Not public |
9 | * Fintek F71808A |
10 | Prefix: 'f71808a' |
11 | Addresses scanned: none, address read from Super I/O config space |
12 | Datasheet: Not public |
13 | * Fintek F71858FG |
14 | Prefix: 'f71858fg' |
15 | Addresses scanned: none, address read from Super I/O config space |
16 | Datasheet: Available from the Fintek website |
17 | * Fintek F71862FG and F71863FG |
18 | Prefix: 'f71862fg' |
19 | Addresses scanned: none, address read from Super I/O config space |
20 | Datasheet: Available from the Fintek website |
21 | * Fintek F71869F and F71869E |
22 | Prefix: 'f71869' |
23 | Addresses scanned: none, address read from Super I/O config space |
24 | Datasheet: Available from the Fintek website |
25 | * Fintek F71869A |
26 | Prefix: 'f71869a' |
27 | Addresses scanned: none, address read from Super I/O config space |
28 | Datasheet: Not public |
29 | * Fintek F71882FG and F71883FG |
30 | Prefix: 'f71882fg' |
31 | Addresses scanned: none, address read from Super I/O config space |
32 | Datasheet: Available from the Fintek website |
33 | * Fintek F71889FG |
34 | Prefix: 'f71889fg' |
35 | Addresses scanned: none, address read from Super I/O config space |
36 | Datasheet: Available from the Fintek website |
37 | * Fintek F71889ED |
38 | Prefix: 'f71889ed' |
39 | Addresses scanned: none, address read from Super I/O config space |
40 | Datasheet: Should become available on the Fintek website soon |
41 | * Fintek F71889A |
42 | Prefix: 'f71889a' |
43 | Addresses scanned: none, address read from Super I/O config space |
44 | Datasheet: Should become available on the Fintek website soon |
45 | * Fintek F8000 |
46 | Prefix: 'f8000' |
47 | Addresses scanned: none, address read from Super I/O config space |
48 | Datasheet: Not public |
49 | * Fintek F81801U |
50 | Prefix: 'f71889fg' |
51 | Addresses scanned: none, address read from Super I/O config space |
52 | Datasheet: Not public |
53 | Note: This is the 64-pin variant of the F71889FG, they have the |
54 | same device ID and are fully compatible as far as hardware |
55 | monitoring is concerned. |
56 | * Fintek F81865F |
57 | Prefix: 'f81865f' |
58 | Addresses scanned: none, address read from Super I/O config space |
59 | Datasheet: Available from the Fintek website |
60 | |
61 | Author: Hans de Goede <hdegoede@redhat.com> |
62 | |
63 | |
64 | Description |
65 | ----------- |
66 | |
67 | Fintek F718xx/F8000 Super I/O chips include complete hardware monitoring |
68 | capabilities. They can monitor up to 9 voltages, 4 fans and 3 temperature |
69 | sensors. |
70 | |
71 | These chips also have fan controlling features, using either DC or PWM, in |
72 | three different modes (one manual, two automatic). |
73 | |
74 | The driver assumes that no more than one chip is present, which seems |
75 | reasonable. |
76 | |
77 | |
78 | Monitoring |
79 | ---------- |
80 | |
81 | The Voltage, Fan and Temperature Monitoring uses the standard sysfs |
82 | interface as documented in sysfs-interface, without any exceptions. |
83 | |
84 | |
85 | Fan Control |
86 | ----------- |
87 | |
88 | Both PWM (pulse-width modulation) and DC fan speed control methods are |
89 | supported. The right one to use depends on external circuitry on the |
90 | motherboard, so the driver assumes that the BIOS set the method |
91 | properly. |
92 | |
93 | Note that the lowest numbered temperature zone trip point corresponds to |
94 | to the border between the highest and one but highest temperature zones, and |
95 | vica versa. So the temperature zone trip points 1-4 (or 1-2) go from high temp |
96 | to low temp! This is how things are implemented in the IC, and the driver |
97 | mimicks this. |
98 | |
99 | There are 2 modes to specify the speed of the fan, PWM duty cycle (or DC |
100 | voltage) mode, where 0-100% duty cycle (0-100% of 12V) is specified. And RPM |
101 | mode where the actual RPM of the fan (as measured) is controlled and the speed |
102 | gets specified as 0-100% of the fan#_full_speed file. |
103 | |
104 | Since both modes work in a 0-100% (mapped to 0-255) scale, there isn't a |
105 | whole lot of a difference when modifying fan control settings. The only |
106 | important difference is that in RPM mode the 0-100% controls the fan speed |
107 | between 0-100% of fan#_full_speed. It is assumed that if the BIOS programs |
108 | RPM mode, it will also set fan#_full_speed properly, if it does not then |
109 | fan control will not work properly, unless you set a sane fan#_full_speed |
110 | value yourself. |
111 | |
112 | Switching between these modes requires re-initializing a whole bunch of |
113 | registers, so the mode which the BIOS has set is kept. The mode is |
114 | printed when loading the driver. |
115 | |
116 | Three different fan control modes are supported; the mode number is written |
117 | to the pwm#_enable file. Note that not all modes are supported on all |
118 | chips, and some modes may only be available in RPM / PWM mode. |
119 | Writing an unsupported mode will result in an invalid parameter error. |
120 | |
121 | * 1: Manual mode |
122 | You ask for a specific PWM duty cycle / DC voltage or a specific % of |
123 | fan#_full_speed by writing to the pwm# file. This mode is only |
124 | available on the F71858FG / F8000 if the fan channel is in RPM mode. |
125 | |
126 | * 2: Normal auto mode |
127 | You can define a number of temperature/fan speed trip points, which % the |
128 | fan should run at at this temp and which temp a fan should follow using the |
129 | standard sysfs interface. The number and type of trip points is chip |
130 | depended, see which files are available in sysfs. |
131 | Fan/PWM channel 3 of the F8000 is always in this mode! |
132 | |
133 | * 3: Thermostat mode (Only available on the F8000 when in duty cycle mode) |
134 | The fan speed is regulated to keep the temp the fan is mapped to between |
135 | temp#_auto_point2_temp and temp#_auto_point3_temp. |
136 | |
137 | All of the automatic modes require that pwm1 corresponds to fan1, pwm2 to |
138 | fan2 and pwm3 to fan3. |
139 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
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v3.9