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| 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. | ||
