Kernel driver aspeed-g6-pwm-tach

Supported chips:

ASPEED AST2600

Authors:

<billy_tsai@aspeedtech.com>

Description:

This driver implements support for ASPEED AST2600 Fan Tacho controller. The controller supports up to 16 tachometer inputs.

The driver provides the following sensor accesses in sysfs:

fanX_input	ro	provide current fan rotation value in RPM as reported by the fan to the device.
fanX_div	rw	Fan divisor: Supported value are power of 4 (1, 4, 16 64, ... 4194304) The larger divisor, the less rpm accuracy and the less affected by fan signal glitch.