5 * Microchip TC654 and TC655
7 Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/20001734C.pdf
10 Chris Packham <chris.packham@alliedtelesis.co.nz>
11 Masahiko Iwamoto <iwamoto@allied-telesis.co.jp>
15 This driver implements support for the Microchip TC654 and TC655.
17 The TC654 uses the 2-wire interface compatible with the SMBUS 2.0
18 specification. The TC654 has two (2) inputs for measuring fan RPM and
19 one (1) PWM output which can be used for fan control.
23 Ordinarily the pwm1_mode ABI is used for controlling the pwm output
24 mode. However, for this chip the output is always pwm, and the
25 pwm1_mode determines if the pwm output is controlled via the pwm1 value
26 or via the Vin analog input.
29 Setting pwm1_mode to 1 will cause the pwm output to be driven based on
30 the pwm1 value. Setting pwm1_mode to 0 will cause the pwm output to be
31 driven based on the Vin input.