projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| aaf6fabf CP |
1 | Kernel driver tc654 |
| 2 | =================== | |
| 3 | ||
| 4 | Supported chips: | |
| b04f2f7d | 5 | |
| 3dead5d5 | 6 | * Microchip TC654 and TC655 |
| b04f2f7d | 7 | |
| aaf6fabf | 8 | Prefix: 'tc654' |
| b04f2f7d MCC |
9 | Datasheet: http://ww1.m |
| 10 | icrochip.com/downloads/en/DeviceDoc/20001734C.pdf | |
| aaf6fabf CP |
11 | |
| 12 | Authors: | |
| b04f2f7d MCC |
13 | - Chris Packham <chris.packham@alliedtelesis.co.nz> |
| 14 | - Masahiko Iwamoto <iwamoto@allied-telesis.co.jp> | |
| aaf6fabf CP |
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. |