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-Kernel driver asb100
-Supported Chips:
- * Asus ASB100 and ASB100-A "Bach"
- Prefix: 'asb100'
- Addresses scanned: I2C 0x2d
- Datasheet: none released
-Author: Mark M. Hoffman <>
-This driver implements support for the Asus ASB100 and ASB100-A "Bach".
-These are custom ASICs available only on Asus mainboards. Asus refuses to
-supply a datasheet for these chips. Thanks go to many people who helped
-investigate their hardware, including:
-Vitaly V. Bursov
-Alexander van Kaam (author of MBM for Windows)
-Bertrik Sikken
-The ASB100 implements seven voltage sensors, three fan rotation speed
-sensors, four temperature sensors, VID lines and alarms. In addition to
-these, the ASB100-A also implements a single PWM controller for fans 2 and
-3 (i.e. one setting controls both.) If you have a plain ASB100, the PWM
-controller will simply not work (or maybe it will for you... it doesn't for
-Temperatures are measured and reported in degrees Celsius.
-Fan speeds are reported in RPM (rotations per minute). An alarm is
-triggered if the rotation speed has dropped below a programmable limit.
-Voltage sensors (also known as IN sensors) report values in volts.
-The VID lines encode the core voltage value: the voltage level your
-processor should work with. This is hardcoded by the mainboard and/or
-processor itself. It is a value in volts.
-Alarms: (TODO question marks indicate may or may not work)
-0x0001 => in0 (?)
-0x0002 => in1 (?)
-0x0004 => in2
-0x0008 => in3
-0x0010 => temp1 (1)
-0x0020 => temp2
-0x0040 => fan1
-0x0080 => fan2
-0x0100 => in4
-0x0200 => in5 (?) (2)
-0x0400 => in6 (?) (2)
-0x0800 => fan3
-0x1000 => chassis switch
-0x2000 => temp3
-Alarm Notes:
-(1) This alarm will only trigger if the hysteresis value is 127C.
-I.e. it behaves the same as w83781d.
-(2) The min and max registers for these values appear to
-be read-only or otherwise stuck at 0x00.
-* Experiment with fan divisors > 8.
-* Experiment with temp. sensor types.
-* Are there really 13 voltage inputs? Probably not...
-* Cleanups, no doubt...