Fix Super-I/O exit sequence for Winbond/Fintek chips. isadump

and friends now use the same sequence as sensors-detect uses.


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@4405 7894878c-1315-0410-8ee3-d5d059ff63e0

CHANGES

@@ -10,6 +10,7 @@ SVN HEAD
   Man page sensors.conf.5: Update the chip statement section
   Module i2c-nforce2: Add nForce MCP61, MCP65 support (2.6 backport)
   Program isadump: Detect when address bit 7 is a busy flag
+                   Fix Super-I/O exit sequence for Winbond/Fintek chips
   Program pwmconfig: Use smaller steps for low PWM values
   Program rrd: Support non-i2c devices (hwmon class)
                Add missing shell declarations

prog/dump/superio.c

@@ -66,6 +66,10 @@ void superio_write_key(int addrreg, unsigned char *key)
 
 void superio_reset(int addrreg, int datareg)
 {
+	/* Some chips (SMSC, Winbond) want this */
+	outb(0xaa, addrreg);
+
+	/* Return to "Wait For Key" state (PNP-ISA spec) */
 	outb(0x02, addrreg);
 	outb(0x02, datareg);
 }