This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / Documentation / hwmon / w83627hf

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+Kernel driver w83627hf
+======================
+
+Supported chips:
+  * Winbond W83627HF (ISA accesses ONLY)
+    Prefix: 'w83627hf'
+    Addresses scanned: ISA address retrieved from Super I/O registers
+    Datasheet: http://www.winbond.com/PDF/sheet/w83627hf.pdf
+  * Winbond W83627THF
+    Prefix: 'w83627thf'
+    Addresses scanned: ISA address retrieved from Super I/O registers
+    Datasheet: http://www.winbond.com/PDF/sheet/w83627thf.pdf
+  * Winbond W83697HF
+    Prefix: 'w83697hf'
+    Addresses scanned: ISA address retrieved from Super I/O registers
+    Datasheet: http://www.winbond.com/PDF/sheet/697hf.pdf
+  * Winbond W83637HF
+    Prefix: 'w83637hf'
+    Addresses scanned: ISA address retrieved from Super I/O registers
+    Datasheet: http://www.winbond.com/PDF/sheet/w83637hf.pdf
+  * Winbond W83687THF
+    Prefix: 'w83687thf'
+    Addresses scanned: ISA address retrieved from Super I/O registers
+    Datasheet: Provided by Winbond on request
+
+Authors:
+        Frodo Looijaard <frodol@dds.nl>,
+        Philip Edelbrock <phil@netroedge.com>,
+        Mark Studebaker <mdsxyz123@yahoo.com>,
+        Bernhard C. Schrenk <clemy@clemy.org>
+
+Module Parameters
+-----------------
+
+* force_addr: int
+  Initialize the ISA address of the sensors
+* force_i2c: int
+  Initialize the I2C address of the sensors
+* init: int
+  (default is 1)
+  Use 'init=0' to bypass initializing the chip.
+  Try this if your computer crashes when you load the module.
+* reset: int
+  (default is 0)
+  The driver used to reset the chip on load, but does no more. Use
+  'reset=1' to restore the old behavior. Report if you need to do this.
+
+Description
+-----------
+
+This driver implements support for ISA accesses *only* for
+the Winbond W83627HF, W83627THF, W83697HF and W83637HF Super I/O chips.
+We will refer to them collectively as Winbond chips.
+
+This driver supports ISA accesses, which should be more reliable
+than i2c accesses. Also, for Tyan boards which contain both a
+Super I/O chip and a second i2c-only Winbond chip (often a W83782D),
+using this driver will avoid i2c address conflicts and complex
+initialization that were required in the w83781d driver.
+
+If you really want i2c accesses for these Super I/O chips,
+use the w83781d driver. However this is not the preferred method
+now that this ISA driver has been developed.
+
+The w83627_HF_ uses pins 110-106 as VID0-VID4. The w83627_THF_ uses the
+same pins as GPIO[0:4]. Technically, the w83627_THF_ does not support a
+VID reading. However the two chips have the identical 128 pin package. So,
+it is possible or even likely for a w83627thf to have the VID signals routed
+to these pins despite their not being labeled for that purpose. Therefore,
+the w83627thf driver interprets these as VID. If the VID on your board
+doesn't work, first see doc/vid in the lm_sensors package[1]. If that still
+doesn't help, you may just ignore the bogus VID reading with no harm done.
+
+For further information on this driver see the w83781d driver documentation.
+
+[1] http://www2.lm-sensors.nu/~lm78/cvs/browse.cgi/lm_sensors2/doc/vid
+