Kernel driver tc654¶
Microchip TC654 and TC655
Prefix: ‘tc654’ Datasheet: http://ww1.m icrochip.com/downloads/en/DeviceDoc/20001734C.pdf
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.
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.