| Kernel driver tc654 |
| =================== |
| |
| Supported chips: |
| * Microchip TC654 and TC655 |
| Prefix: 'tc654' |
| Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/20001734C.pdf |
| |
| Authors: |
| Chris Packham <chris.packham@alliedtelesis.co.nz> |
| Masahiko Iwamoto <iwamoto@allied-telesis.co.jp> |
| |
| 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. |