Kernel driver tc654

Supported chips:

  • Microchip TC654 and TC655

    Prefix: ‘tc654’ Datasheet: http://ww1.m icrochip.com/downloads/en/DeviceDoc/20001734C.pdf

Authors:

Description

This driver implements support for the Microchip TC654 and TC655.

The TC654 uses the 2-wire interface compatible with the SMBUS 2.0 specification. The TC654 has two (2) inputs for measuring fan RPM and one (1) PWM output which can be used for fan control.

Configuration Notes

Ordinarily the pwm1_mode ABI is used for controlling the pwm output mode. However, for this chip the output is always pwm, and the pwm1_mode determines if the pwm output is controlled via the pwm1 value or via the Vin analog input.

Setting pwm1_mode to 1 will cause the pwm output to be driven based on the pwm1 value. Setting pwm1_mode to 0 will cause the pwm output to be driven based on the Vin input.