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authorKevin Lo <kevlo@kevlo.org>2007-11-22 20:31:52 -0500
committerMark M. Hoffman <mhoffman@lightlink.com>2008-02-07 20:39:40 -0500
commit85f03bccd6e0e2ac6ccf017d4bcd5d74bb87a671 (patch)
tree2e71c1f5edbbb9e78237da39f208514656c873a1 /Documentation
parentce9c2f449b9e6b68d3a71ba146d64c44c8945d8d (diff)
hwmon: Add support for Winbond W83L786NG/NR
Signed-off-by: Kevin Lo <kevlo@kevlo.org> Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
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1Kernel driver w83l786ng
2=====================
3
4Supported 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
10Author: Kevin Lo <kevlo@kevlo.org>
11
12
13Module 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
22Description
23-----------
24
25This driver implements support for Winbond W83L786NG/W83L786NR chips.
26
27The driver implements two temperature sensors, two fan rotation speed
28sensors, and three voltage sensors.
29
30Temperatures are measured in degrees Celsius and measurement resolution is 1
31degC for temp1 and temp2.
32
33Fan rotation speeds are reported in RPM (rotations per minute). Fan readings
34readings can be divided by a programmable divider (1, 2, 4, 8, 16, 32, 64
35or 128 for fan 1/2) to give the readings more range or accuracy.
36
37Voltage sensors (also known as IN sensors) report their values in millivolts.
38An alarm is triggered if the voltage has crossed a programmable minimum
39or maximum limit.
40
41/sys files
42----------
43
44pwm[1-2] - this file stores PWM duty cycle or DC value (fan speed) in range:
45 0 (stop) to 255 (full)
46pwm[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
51pwm[1-2]_mode - Select PWM of DC mode
52 * 0 DC
53 * 1 PWM
54tolerance[1-2] - Value in degrees of Celsius (degC) for +- T