Commit | Line | Data |
---|---|---|
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1 | Kernel driver w83l785ts |
2 | ======================= | |
3 | ||
4 | Supported chips: | |
b04f2f7d | 5 | |
7f15b664 | 6 | * Winbond W83L785TS-S |
b04f2f7d | 7 | |
7f15b664 | 8 | Prefix: 'w83l785ts' |
b04f2f7d | 9 | |
7f15b664 | 10 | Addresses scanned: I2C 0x2e |
b04f2f7d | 11 | |
7f15b664 | 12 | Datasheet: Publicly available at the Winbond USA website |
b04f2f7d MCC |
13 | |
14 | http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/W83L785TS-S.pdf | |
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15 | |
16 | Authors: | |
b04f2f7d | 17 | Jean Delvare <jdelvare@suse.de> |
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18 | |
19 | Description | |
20 | ----------- | |
21 | ||
22 | The W83L785TS-S is a digital temperature sensor. It senses the | |
23 | temperature of a single external diode. The high limit is | |
24 | theoretically defined as 85 or 100 degrees C through a combination | |
25 | of external resistors, so the user cannot change it. Values seen so | |
26 | far suggest that the two possible limits are actually 95 and 110 | |
27 | degrees C. The datasheet is rather poor and obviously inaccurate | |
28 | on several points including this one. | |
29 | ||
30 | All temperature values are given in degrees Celsius. Resolution | |
31 | is 1.0 degree. See the datasheet for details. | |
32 | ||
33 | The w83l785ts driver will not update its values more frequently than | |
34 | every other second; reading them more often will do no harm, but will | |
35 | return 'old' values. | |
36 | ||
37 | Known Issues | |
38 | ------------ | |
39 | ||
40 | On some systems (Asus), the BIOS is known to interfere with the driver | |
4040c415 JD |
41 | and cause read errors. Or maybe the W83L785TS-S chip is simply unreliable, |
42 | we don't really know. The driver will retry a given number of times | |
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43 | (5 by default) and then give up, returning the old value (or 0 if |
44 | there is no old value). It seems to work well enough so that you should | |
45 | not notice anything. Thanks to James Bolt for helping test this feature. |