projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 85f03bcc KL |
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 |