| Kevin Lo | 85f03bc | 2007-11-23 09:31:52 +0800 | [diff] [blame^] | 1 | Kernel driver w83l786ng |
| 2 | ===================== |
| 3 | |
| 4 | Supported chips: |
| 5 | * Winbond W83L786NG/W83L786NR |
| 6 | Prefix: 'w83l786ng' |
| 7 | Addresses scanned: I2C 0x2e - 0x2f |
| 8 | Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/W83L786NRNG09.pdf |
| 9 | |
| 10 | Author: Kevin Lo <kevlo@kevlo.org> |
| 11 | |
| 12 | |
| 13 | Module Parameters |
| 14 | ----------------- |
| 15 | |
| 16 | * reset boolean |
| 17 | (default 0) |
| 18 | Use 'reset=1' to reset the chip (via index 0x40, bit 7). The default |
| 19 | behavior is no chip reset to preserve BIOS settings |
| 20 | |
| 21 | |
| 22 | Description |
| 23 | ----------- |
| 24 | |
| 25 | This driver implements support for Winbond W83L786NG/W83L786NR chips. |
| 26 | |
| 27 | The driver implements two temperature sensors, two fan rotation speed |
| 28 | sensors, and three voltage sensors. |
| 29 | |
| 30 | Temperatures are measured in degrees Celsius and measurement resolution is 1 |
| 31 | degC for temp1 and temp2. |
| 32 | |
| 33 | Fan rotation speeds are reported in RPM (rotations per minute). Fan readings |
| 34 | readings can be divided by a programmable divider (1, 2, 4, 8, 16, 32, 64 |
| 35 | or 128 for fan 1/2) to give the readings more range or accuracy. |
| 36 | |
| 37 | Voltage sensors (also known as IN sensors) report their values in millivolts. |
| 38 | An alarm is triggered if the voltage has crossed a programmable minimum |
| 39 | or maximum limit. |
| 40 | |
| 41 | /sys files |
| 42 | ---------- |
| 43 | |
| 44 | pwm[1-2] - this file stores PWM duty cycle or DC value (fan speed) in range: |
| 45 | 0 (stop) to 255 (full) |
| 46 | pwm[1-2]_enable - this file controls mode of fan/temperature control: |
| 47 | * 0 Manual Mode |
| 48 | * 1 Thermal Cruise |
| 49 | * 2 Smart Fan II |
| 50 | * 4 FAN_SET |
| 51 | pwm[1-2]_mode - Select PWM of DC mode |
| 52 | * 0 DC |
| 53 | * 1 PWM |
| 54 | tolerance[1-2] - Value in degrees of Celsius (degC) for +- T |