2005-05-26 08:42:19 -04:00
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Kernel driver w83l785ts
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=======================
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Supported chips:
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* Winbond W83L785TS-S
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Prefix: 'w83l785ts'
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Addresses scanned: I2C 0x2e
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Datasheet: Publicly available at the Winbond USA website
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http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/W83L785TS-S.pdf
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Authors:
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Jean Delvare <khali@linux-fr.org>
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Description
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-----------
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The W83L785TS-S is a digital temperature sensor. It senses the
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temperature of a single external diode. The high limit is
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theoretically defined as 85 or 100 degrees C through a combination
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of external resistors, so the user cannot change it. Values seen so
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far suggest that the two possible limits are actually 95 and 110
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degrees C. The datasheet is rather poor and obviously inaccurate
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on several points including this one.
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All temperature values are given in degrees Celsius. Resolution
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is 1.0 degree. See the datasheet for details.
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The w83l785ts driver will not update its values more frequently than
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every other second; reading them more often will do no harm, but will
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return 'old' values.
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Known Issues
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------------
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On some systems (Asus), the BIOS is known to interfere with the driver
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2008-02-12 05:17:26 -05:00
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and cause read errors. Or maybe the W83L785TS-S chip is simply unreliable,
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we don't really know. The driver will retry a given number of times
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2005-05-26 08:42:19 -04:00
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(5 by default) and then give up, returning the old value (or 0 if
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there is no old value). It seems to work well enough so that you should
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not notice anything. Thanks to James Bolt for helping test this feature.
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