Backport updates from Linux 2.6.

git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@3146 7894878c-1315-0410-8ee3-d5d059ff63e0

doc/chips/via686a

@@ -20,8 +20,9 @@ Authors: Ky
 Module Parameters
 -----------------
 
-force_addr=0xaddr	Set the I/O base address. Useful for Asus A7V boards
-			that don't set the address in the BIOS. Does not do a
+force_addr=0xaddr	Set the I/O base address. Useful for boards that
+			don't set the address in the BIOS. Look for a BIOS
+			upgrade before resorting to this. Does not do a
 			PCI force; the via686a must still be present in lspci.
 			Don't use this unless the driver complains that the
 			base address is not set.
@@ -68,6 +69,19 @@ The driver only updates its values each 1.5 seconds; reading it more often
 will do no harm, but will return 'old' values.
 
 
+Known Issues
+------------
+
+This driver handles sensors integrated in some VIA south bridges. It is
+possible that a motherboard maker used a VT82C686A/B chip as part of a
+product design but was not interested in its hardware monitoring features,
+in which case the sensor inputs will not be wired. This is the case of
+the Asus K7V, A7V and A7V133 motherboards, to name only a few of them.
+So, if you need the force_addr parameter, and end up with values which
+don't seem to make any sense, don't look any further: your chip is simply
+not wired for hardware monitoring.
+
+
 Chip Features
 -------------