Commit | Line | Data |
---|---|---|
7f15b664 RM |
1 | Kernel driver w83l785ts |
2 | ======================= | |
3 | ||
4 | Supported chips: | |
5 | * Winbond W83L785TS-S | |
6 | Prefix: 'w83l785ts' | |
7 | Addresses scanned: I2C 0x2e | |
8 | Datasheet: Publicly available at the Winbond USA website | |
9 | http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/W83L785TS-S.pdf | |
10 | ||
11 | Authors: | |
12 | Jean Delvare <khali@linux-fr.org> | |
13 | ||
14 | Description | |
15 | ----------- | |
16 | ||
17 | The W83L785TS-S is a digital temperature sensor. It senses the | |
18 | temperature of a single external diode. The high limit is | |
19 | theoretically defined as 85 or 100 degrees C through a combination | |
20 | of external resistors, so the user cannot change it. Values seen so | |
21 | far suggest that the two possible limits are actually 95 and 110 | |
22 | degrees C. The datasheet is rather poor and obviously inaccurate | |
23 | on several points including this one. | |
24 | ||
25 | All temperature values are given in degrees Celsius. Resolution | |
26 | is 1.0 degree. See the datasheet for details. | |
27 | ||
28 | The w83l785ts driver will not update its values more frequently than | |
29 | every other second; reading them more often will do no harm, but will | |
30 | return 'old' values. | |
31 | ||
32 | Known Issues | |
33 | ------------ | |
34 | ||
35 | On some systems (Asus), the BIOS is known to interfere with the driver | |
36 | and cause read errors. The driver will retry a given number of times | |
37 | (5 by default) and then give up, returning the old value (or 0 if | |
38 | there is no old value). It seems to work well enough so that you should | |
39 | not notice anything. Thanks to James Bolt for helping test this feature. |