Kernel driver `vt8231.o' ======================== Status: Beta Supported chips: * VIA VT8231 South Bridge Prefix: 'vt8231' Addresses scanned: none, address read from PCI space Author: Mark D. Studebaker License: GPL Module Parameters ----------------- * force_addr: int Initialize the base address of the sensors * force: short array (min = 1, max = 48) List of adapter,address pairs to boldly assume to be present * force_vt8231: short array (min = 1, max = 48) List of adapter,address pairs which are unquestionably assumed to contain a `vt8231' chip * probe: short array (min = 1, max = 48) List of adapter,address pairs to scan additionally * probe_range: short array (min = 1, max = 48) List of adapter,start-addr,end-addr triples to scan additionally * ignore: short array (min = 1, max = 48) List of adapter,address pairs not to scan * ignore_range: short array (min = 1, max = 48) List of adapter,start-addr,end-addr triples not to scan Description ----------- The VIA VT8231 South Bridge contains voltage/temperature monitoring and PWM control circuitry for two fans. We define the sensors as follows. Sensor Voltage Mode Temp Mode uch_config bit ------ ------------ --------- -------------- Reading 1 temp1 UCH1 in0 temp2 0x04 (4) UCH2 in1 temp3 0x08 (8) UCH3 in2 temp4 0x10 (16) UCH4 in3 temp5 0x20 (32) UCH5 in4 temp6 0x40 (64) 3.3V in5 As noted above, 5 of the sensors are "universal channels" and can be set for either voltage or temperature. Set the uch_config bit (in /proc) to 0 for voltage and 1 for temperature. Voltages will read 0 if set for temperature. Temperatures will read a really low number if set for voltage. Fan rotation speeds are reported in RPM (rotations per minute). An alarm is triggered if the rotation speed has dropped below a programmable limit. Fan readings can be divided by a programmable divider (1, 2, 4 or 8) to give the readings more range or accuracy. Not all RPM values can accurately be represented, so some rounding is done. With a divider of 2, the lowest representable value is around 2600 RPM. PWM values are from 0 to 255. The first value in the /proc entry is the pwm value; the second is the enable (0 or 1). If an alarm triggers, it will remain triggered until the hardware register is read at least once. This means that the cause for the alarm may already have disappeared! Note that in the current implementation, all hardware registers are read whenever any data is read (unless it is less than 1.5 seconds since the last update). This means that you can easily miss once-only alarms. Chip Features ------------- Chip 'vt8231' LABEL LABEL CLASS COMPUTE CLASS MODE MAGN in0 - - R- 2 in1 - - R- 2 in2 - - R- 2 in3 - - R- 2 in4 - - R- 2 in5 - - R- 2 in0_min in0 in0 RW 2 in1_min in1 in1 RW 2 in2_min in2 in2 RW 2 in3_min in3 in3 RW 2 in4_min in4 in4 RW 2 in5_min in5 in5 RW 2 in0_max in0 in0 RW 2 in1_max in1 in1 RW 2 in2_max in2 in2 RW 2 in3_max in3 in3 RW 2 in4_max in4 in4 RW 2 in5_max in5 in5 RW 2 fan1 - - R- 0 fan2 - - R- 0 fan1_min fan1 fan1 RW 0 fan2_min fan2 fan2 RW 0 temp1 - - R- 1 temp1_hyst temp1 temp1 RW 1 temp1_over temp1 temp1 RW 1 temp2 - - R- 2 temp2_hyst temp2 temp2 RW 2 temp2_over temp2 temp2 RW 2 temp3 - - R- 2 temp3_hyst temp3 temp3 RW 2 temp3_over temp3 temp3 RW 2 temp4 - - R- 2 temp4_hyst temp4 temp4 RW 2 temp4_over temp4 temp4 RW 2 temp5 - - R- 2 temp5_hyst temp5 temp5 RW 2 temp5_over temp5 temp5 RW 2 temp6 - - R- 2 temp6_hyst temp6 temp6 RW 2 temp6_over temp6 temp6 RW 2 fan1_div fan1 - RW 0 fan2_div fan2 - RW 0 alarms - - R- 0 vid - - R- 3 vrm - - RW 1 config - - R- 0 LABEL FEATURE SYMBOL SYSCTL FILE:N in0 SENSORS_VT8231_IN0 in0:3 in1 SENSORS_VT8231_IN1 in1:3 in2 SENSORS_VT8231_IN2 in2:3 in3 SENSORS_VT8231_IN3 in3:3 in4 SENSORS_VT8231_IN4 in4:3 in5 SENSORS_VT8231_IN5 in5:3 in0_min SENSORS_VT8231_IN0_MIN in0:1 in1_min SENSORS_VT8231_IN1_MIN in1:1 in2_min SENSORS_VT8231_IN2_MIN in2:1 in3_min SENSORS_VT8231_IN3_MIN in3:1 in4_min SENSORS_VT8231_IN4_MIN in4:1 in5_min SENSORS_VT8231_IN5_MIN in5:1 in0_max SENSORS_VT8231_IN0_MAX in0:2 in1_max SENSORS_VT8231_IN1_MAX in1:2 in2_max SENSORS_VT8231_IN2_MAX in2:2 in3_max SENSORS_VT8231_IN3_MAX in3:2 in4_max SENSORS_VT8231_IN4_MAX in4:2 in5_max SENSORS_VT8231_IN5_MAX in5:2 fan1 SENSORS_VT8231_FAN1 fan1:2 fan2 SENSORS_VT8231_FAN2 fan2:2 fan1_min SENSORS_VT8231_FAN1_MIN fan1:1 fan2_min SENSORS_VT8231_FAN2_MIN fan2:1 temp1 SENSORS_VT8231_TEMP temp1:3 temp1_hyst SENSORS_VT8231_TEMP_HYST temp1:2 temp1_over SENSORS_VT8231_TEMP_OVER temp1:1 temp2 SENSORS_VT8231_TEMP2 temp2:3 temp2_hyst SENSORS_VT8231_TEMP2_HYST temp2:2 temp2_over SENSORS_VT8231_TEMP2_OVER temp2:1 temp3 SENSORS_VT8231_TEMP3 temp3:3 temp3_hyst SENSORS_VT8231_TEMP3_HYST temp3:2 temp3_over SENSORS_VT8231_TEMP3_OVER temp3:1 temp4 SENSORS_VT8231_TEMP4 temp4:3 temp4_hyst SENSORS_VT8231_TEMP4_HYST temp4:2 temp4_over SENSORS_VT8231_TEMP4_OVER temp4:1 temp5 SENSORS_VT8231_TEMP5 temp5:3 temp5_hyst SENSORS_VT8231_TEMP5_HYST temp5:2 temp5_over SENSORS_VT8231_TEMP5_OVER temp5:1 temp6 SENSORS_VT8231_TEMP6 temp6:3 temp6_hyst SENSORS_VT8231_TEMP6_HYST temp6:2 temp6_over SENSORS_VT8231_TEMP6_OVER temp6:1 fan1_div SENSORS_VT8231_FAN1_DIV fan_div:1 fan2_div SENSORS_VT8231_FAN2_DIV fan_div:2 alarms SENSORS_VT8231_ALARMS alarms:1 vid SENSORS_VT8231_VID vid:1 vrm SENSORS_VT8231_VRM vrm:1 config SENSORS_VT8231_UCH uch_config:1 Notes ----- The lm_sensors project gratefully acknowledges the support of VIA in the development of this driver.