| Kernel driver w83l785ts | |
| ======================= | |
| Supported chips: | |
| * Winbond W83L785TS-S | |
| Prefix: 'w83l785ts' | |
| Addresses scanned: I2C 0x2e | |
| Datasheet: Publicly available at the Winbond USA website | |
| http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/W83L785TS-S.pdf | |
| Authors: | |
| Jean Delvare <khali@linux-fr.org> | |
| Description | |
| ----------- | |
| The W83L785TS-S is a digital temperature sensor. It senses the | |
| temperature of a single external diode. The high limit is | |
| theoretically defined as 85 or 100 degrees C through a combination | |
| of external resistors, so the user cannot change it. Values seen so | |
| far suggest that the two possible limits are actually 95 and 110 | |
| degrees C. The datasheet is rather poor and obviously inaccurate | |
| on several points including this one. | |
| All temperature values are given in degrees Celsius. Resolution | |
| is 1.0 degree. See the datasheet for details. | |
| The w83l785ts driver will not update its values more frequently than | |
| every other second; reading them more often will do no harm, but will | |
| return 'old' values. | |
| Known Issues | |
| ------------ | |
| On some systems (Asus), the BIOS is known to interfere with the driver | |
| and cause read errors. Or maybe the W83L785TS-S chip is simply unreliable, | |
| we don't really know. The driver will retry a given number of times | |
| (5 by default) and then give up, returning the old value (or 0 if | |
| there is no old value). It seems to work well enough so that you should | |
| not notice anything. Thanks to James Bolt for helping test this feature. |