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Documentation/hwmon/w83l785ts 1.49 KB
7f15b6646   Rudolf Marek   [PATCH] I2C: docu...
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  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:
7c81c60f3   Jean Delvare   Update Jean Delva...
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          Jean Delvare <jdelvare@suse.de>
7f15b6646   Rudolf Marek   [PATCH] I2C: docu...
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  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
4040c415f   Jean Delvare   hwmon: (w83l785ts...
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  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
7f15b6646   Rudolf Marek   [PATCH] I2C: docu...
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  (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.