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1 | Kernel driver w83l786ng | ||
2 | ======================= | ||
3 | |||
4 | Supported chips: | ||
5 | |||
6 | * Winbond W83L786NG/W83L786NR | ||
7 | |||
8 | Prefix: 'w83l786ng' | ||
9 | |||
10 | Addresses scanned: I2C 0x2e - 0x2f | ||
11 | |||
12 | Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/W83L786NRNG09.pdf | ||
13 | |||
14 | Author: Kevin Lo <kevlo@kevlo.org> | ||
15 | |||
16 | |||
17 | Module Parameters | ||
18 | ----------------- | ||
19 | |||
20 | * reset boolean | ||
21 | (default 0) | ||
22 | |||
23 | Use 'reset=1' to reset the chip (via index 0x40, bit 7). The default | ||
24 | behavior is no chip reset to preserve BIOS settings | ||
25 | |||
26 | |||
27 | Description | ||
28 | ----------- | ||
29 | |||
30 | This driver implements support for Winbond W83L786NG/W83L786NR chips. | ||
31 | |||
32 | The driver implements two temperature sensors, two fan rotation speed | ||
33 | sensors, and three voltage sensors. | ||
34 | |||
35 | Temperatures are measured in degrees Celsius and measurement resolution is 1 | ||
36 | degC for temp1 and temp2. | ||
37 | |||
38 | Fan rotation speeds are reported in RPM (rotations per minute). Fan readings | ||
39 | readings can be divided by a programmable divider (1, 2, 4, 8, 16, 32, 64 | ||
40 | or 128 for fan 1/2) to give the readings more range or accuracy. | ||
41 | |||
42 | Voltage sensors (also known as IN sensors) report their values in millivolts. | ||
43 | An alarm is triggered if the voltage has crossed a programmable minimum | ||
44 | or maximum limit. | ||
45 | |||
46 | /sys files | ||
47 | ---------- | ||
48 | |||
49 | pwm[1-2] | ||
50 | - this file stores PWM duty cycle or DC value (fan speed) in range: | ||
51 | |||
52 | 0 (stop) to 255 (full) | ||
53 | pwm[1-2]_enable | ||
54 | - this file controls mode of fan/temperature control: | ||
55 | |||
56 | * 0 Manual Mode | ||
57 | * 1 Thermal Cruise | ||
58 | * 2 Smart Fan II | ||
59 | * 4 FAN_SET | ||
60 | pwm[1-2]_mode | ||
61 | - Select PWM of DC mode | ||
62 | |||
63 | * 0 DC | ||
64 | * 1 PWM | ||
65 | tolerance[1-2] | ||
66 | - Value in degrees of Celsius (degC) for +- T | ||