1 Kernel driver tc654 2 =================== 3 4 Supported chips: 5 6 * Microchip TC654 and TC655 7 8 Prefix: 'tc654' 9 Datasheet: http://ww1.m 10 icrochip.com/downloads/en/DeviceDoc/20001734C.pdf 11 12 Authors: 13 - Chris Packham <chris.packham@alliedtelesis.co.nz> 14 - Masahiko Iwamoto <iwamoto@allied-telesis.co.jp> 15 16 Description 17 ----------- 18 This driver implements support for the Microchip TC654 and TC655. 19 20 The TC654 uses the 2-wire interface compatible with the SMBUS 2.0 21 specification. The TC654 has two (2) inputs for measuring fan RPM and 22 one (1) PWM output which can be used for fan control. 23 24 Configuration Notes 25 ------------------- 26 Ordinarily the pwm1_mode ABI is used for controlling the pwm output 27 mode. However, for this chip the output is always pwm, and the 28 pwm1_mode determines if the pwm output is controlled via the pwm1 value 29 or via the Vin analog input. 30 31 32 Setting pwm1_mode to 1 will cause the pwm output to be driven based on 33 the pwm1 value. Setting pwm1_mode to 0 will cause the pwm output to be 34 driven based on the Vin input.
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