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-Kernel driver emc2103
-Supported chips:
- * SMSC EMC2103
- Addresses scanned: I2C 0x2e
- Prefix: 'emc2103'
- Datasheet: Not public
- Steve Glendinning <>
-The Standard Microsystems Corporation (SMSC) EMC2103 chips
-contain up to 4 temperature sensors and a single fan controller.
-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 1, the lowest
-representable value is 480 RPM.
-This driver supports RPM based control, to use this a fan target
-should be written to fan1_target and pwm1_enable should be set to 3.
-The 2103-2 and 2103-4 variants have a third temperature sensor, which can
-be connected to two anti-parallel diodes. These values can be read
-as temp3 and temp4. If only one diode is attached to this channel, temp4
-will show as "fault". The module parameter "apd=0" can be used to suppress
-this 4th channel when anti-parallel diodes are not fitted.