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| -rw-r--r-- | Documentation/hwmon/tc654 | 31 |
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diff --git a/Documentation/hwmon/tc654 b/Documentation/hwmon/tc654 new file mode 100644 index 000000000..47636a807 --- /dev/null +++ b/Documentation/hwmon/tc654 @@ -0,0 +1,31 @@ +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. |