1 Kernel driver f71882fg
2 ======================
3
4 Supported chips:
5
6 * Fintek F71808E
7
8 Prefix: 'f71808e'
9
10 Addresses scanned: none, address read from
11
12 Datasheet: Not public
13
14 * Fintek F71808A
15
16 Prefix: 'f71808a'
17
18 Addresses scanned: none, address read from
19
20 Datasheet: Not public
21
22 * Fintek F71858FG
23
24 Prefix: 'f71858fg'
25
26 Addresses scanned: none, address read from
27
28 Datasheet: Available from the Fintek websi
29
30 * Fintek F71862FG and F71863FG
31
32 Prefix: 'f71862fg'
33
34 Addresses scanned: none, address read from
35
36 Datasheet: Available from the Fintek websi
37
38 * Fintek F71869F and F71869E
39
40 Prefix: 'f71869'
41
42 Addresses scanned: none, address read from
43
44 Datasheet: Available from the Fintek websi
45
46 * Fintek F71869A
47
48 Prefix: 'f71869a'
49
50 Addresses scanned: none, address read from
51
52 Datasheet: Not public
53
54 * Fintek F71882FG and F71883FG
55
56 Prefix: 'f71882fg'
57
58 Addresses scanned: none, address read from
59
60 Datasheet: Available from the Fintek websi
61
62 * Fintek F71889FG
63
64 Prefix: 'f71889fg'
65
66 Addresses scanned: none, address read from
67
68 Datasheet: Available from the Fintek websi
69
70 * Fintek F71889ED
71
72 Prefix: 'f71889ed'
73
74 Addresses scanned: none, address read from
75
76 Datasheet: Should become available on the
77
78 * Fintek F71889A
79
80 Prefix: 'f71889a'
81
82 Addresses scanned: none, address read from
83
84 Datasheet: Should become available on the
85
86 * Fintek F8000
87
88 Prefix: 'f8000'
89
90 Addresses scanned: none, address read from
91
92 Datasheet: Not public
93
94 * Fintek F81801U
95
96 Prefix: 'f71889fg'
97
98 Addresses scanned: none, address read from
99
100 Datasheet: Not public
101
102 Note:
103 This is the 64-pin variant of the F7
104 same device ID and are fully compati
105 monitoring is concerned.
106
107 * Fintek F81865F
108
109 Prefix: 'f81865f'
110
111 Addresses scanned: none, address read from
112
113 Datasheet: Available from the Fintek websi
114
115 Author: Hans de Goede <hdegoede@redhat.com>
116
117
118 Description
119 -----------
120
121 Fintek F718xx/F8000 Super I/O chips include co
122 capabilities. They can monitor up to 9 voltage
123 sensors.
124
125 These chips also have fan controlling features
126 three different modes (one manual, two automat
127
128 The driver assumes that no more than one chip
129 reasonable.
130
131
132 Monitoring
133 ----------
134
135 The Voltage, Fan and Temperature Monitoring us
136 interface as documented in sysfs-interface, wi
137
138
139 Fan Control
140 -----------
141
142 Both PWM (pulse-width modulation) and DC fan s
143 supported. The right one to use depends on ext
144 motherboard, so the driver assumes that the BI
145 properly.
146
147 Note that the lowest numbered temperature zone
148 the border between the highest and one but hig
149 vica versa. So the temperature zone trip point
150 to low temp! This is how things are implemente
151 mimics this.
152
153 There are 2 modes to specify the speed of the
154 voltage) mode, where 0-100% duty cycle (0-100%
155 mode where the actual RPM of the fan (as measu
156 gets specified as 0-100% of the fan#_full_spee
157
158 Since both modes work in a 0-100% (mapped to 0
159 whole lot of a difference when modifying fan c
160 important difference is that in RPM mode the 0
161 between 0-100% of fan#_full_speed. It is assum
162 RPM mode, it will also set fan#_full_speed pro
163 fan control will not work properly, unless you
164 value yourself.
165
166 Switching between these modes requires re-init
167 registers, so the mode which the BIOS has set
168 printed when loading the driver.
169
170 Three different fan control modes are supporte
171 to the pwm#_enable file. Note that not all mod
172 chips, and some modes may only be available in
173 Writing an unsupported mode will result in an
174
175 * 1: Manual mode
176 You ask for a specific PWM duty cycle / DC v
177 fan#_full_speed by writing to the pwm# file.
178 available on the F71858FG / F8000 if the fan
179
180 * 2: Normal auto mode
181 You can define a number of temperature/fan s
182 fan should run at at this temp and which tem
183 standard sysfs interface. The number and typ
184 depended, see which files are available in s
185 Fan/PWM channel 3 of the F8000 is always in
186
187 * 3: Thermostat mode (Only available on the F8
188 The fan speed is regulated to keep the temp
189 temp#_auto_point2_temp and temp#_auto_point3
190
191 All of the automatic modes require that pwm1 c
192 fan2 and pwm3 to fan3.
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