1Kernel driver f71882fg 2====================== 3 4Supported chips: 5 6 * Fintek F71808E 7 8 Prefix: 'f71808e' 9 10 Addresses scanned: none, address read from Super I/O config space 11 12 Datasheet: Not public 13 14 * Fintek F71808A 15 16 Prefix: 'f71808a' 17 18 Addresses scanned: none, address read from Super I/O config space 19 20 Datasheet: Not public 21 22 * Fintek F71858FG 23 24 Prefix: 'f71858fg' 25 26 Addresses scanned: none, address read from Super I/O config space 27 28 Datasheet: Available from the Fintek website 29 30 * Fintek F71862FG and F71863FG 31 32 Prefix: 'f71862fg' 33 34 Addresses scanned: none, address read from Super I/O config space 35 36 Datasheet: Available from the Fintek website 37 38 * Fintek F71869F and F71869E 39 40 Prefix: 'f71869' 41 42 Addresses scanned: none, address read from Super I/O config space 43 44 Datasheet: Available from the Fintek website 45 46 * Fintek F71869A 47 48 Prefix: 'f71869a' 49 50 Addresses scanned: none, address read from Super I/O config space 51 52 Datasheet: Not public 53 54 * Fintek F71882FG and F71883FG 55 56 Prefix: 'f71882fg' 57 58 Addresses scanned: none, address read from Super I/O config space 59 60 Datasheet: Available from the Fintek website 61 62 * Fintek F71889FG 63 64 Prefix: 'f71889fg' 65 66 Addresses scanned: none, address read from Super I/O config space 67 68 Datasheet: Available from the Fintek website 69 70 * Fintek F71889ED 71 72 Prefix: 'f71889ed' 73 74 Addresses scanned: none, address read from Super I/O config space 75 76 Datasheet: Should become available on the Fintek website soon 77 78 * Fintek F71889A 79 80 Prefix: 'f71889a' 81 82 Addresses scanned: none, address read from Super I/O config space 83 84 Datasheet: Should become available on the Fintek website soon 85 86 * Fintek F8000 87 88 Prefix: 'f8000' 89 90 Addresses scanned: none, address read from Super I/O config space 91 92 Datasheet: Not public 93 94 * Fintek F81801U 95 96 Prefix: 'f71889fg' 97 98 Addresses scanned: none, address read from Super I/O config space 99 100 Datasheet: Not public 101 102 Note: 103 This is the 64-pin variant of the F71889FG, they have the 104 same device ID and are fully compatible as far as hardware 105 monitoring is concerned. 106 107 * Fintek F81865F 108 109 Prefix: 'f81865f' 110 111 Addresses scanned: none, address read from Super I/O config space 112 113 Datasheet: Available from the Fintek website 114 115Author: Hans de Goede <hdegoede@redhat.com> 116 117 118Description 119----------- 120 121Fintek F718xx/F8000 Super I/O chips include complete hardware monitoring 122capabilities. They can monitor up to 9 voltages, 4 fans and 3 temperature 123sensors. 124 125These chips also have fan controlling features, using either DC or PWM, in 126three different modes (one manual, two automatic). 127 128The driver assumes that no more than one chip is present, which seems 129reasonable. 130 131 132Monitoring 133---------- 134 135The Voltage, Fan and Temperature Monitoring uses the standard sysfs 136interface as documented in sysfs-interface, without any exceptions. 137 138 139Fan Control 140----------- 141 142Both PWM (pulse-width modulation) and DC fan speed control methods are 143supported. The right one to use depends on external circuitry on the 144motherboard, so the driver assumes that the BIOS set the method 145properly. 146 147Note that the lowest numbered temperature zone trip point corresponds to 148the border between the highest and one but highest temperature zones, and 149vica versa. So the temperature zone trip points 1-4 (or 1-2) go from high temp 150to low temp! This is how things are implemented in the IC, and the driver 151mimics this. 152 153There are 2 modes to specify the speed of the fan, PWM duty cycle (or DC 154voltage) mode, where 0-100% duty cycle (0-100% of 12V) is specified. And RPM 155mode where the actual RPM of the fan (as measured) is controlled and the speed 156gets specified as 0-100% of the fan#_full_speed file. 157 158Since both modes work in a 0-100% (mapped to 0-255) scale, there isn't a 159whole lot of a difference when modifying fan control settings. The only 160important difference is that in RPM mode the 0-100% controls the fan speed 161between 0-100% of fan#_full_speed. It is assumed that if the BIOS programs 162RPM mode, it will also set fan#_full_speed properly, if it does not then 163fan control will not work properly, unless you set a sane fan#_full_speed 164value yourself. 165 166Switching between these modes requires re-initializing a whole bunch of 167registers, so the mode which the BIOS has set is kept. The mode is 168printed when loading the driver. 169 170Three different fan control modes are supported; the mode number is written 171to the pwm#_enable file. Note that not all modes are supported on all 172chips, and some modes may only be available in RPM / PWM mode. 173Writing an unsupported mode will result in an invalid parameter error. 174 175* 1: Manual mode 176 You ask for a specific PWM duty cycle / DC voltage or a specific % of 177 fan#_full_speed by writing to the pwm# file. This mode is only 178 available on the F71858FG / F8000 if the fan channel is in RPM mode. 179 180* 2: Normal auto mode 181 You can define a number of temperature/fan speed trip points, which % the 182 fan should run at at this temp and which temp a fan should follow using the 183 standard sysfs interface. The number and type of trip points is chip 184 depended, see which files are available in sysfs. 185 Fan/PWM channel 3 of the F8000 is always in this mode! 186 187* 3: Thermostat mode (Only available on the F8000 when in duty cycle mode) 188 The fan speed is regulated to keep the temp the fan is mapped to between 189 temp#_auto_point2_temp and temp#_auto_point3_temp. 190 191All of the automatic modes require that pwm1 corresponds to fan1, pwm2 to 192fan2 and pwm3 to fan3. 193