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Kernel driver tc654
===================
Supported chips:
* Microchip TC654 and TC655
Prefix: 'tc654'
Datasheet:
http://ww1.m
icrochip.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.