f71805f: Fix the device address decoding

The lowest 3 bits are ignored, and the chip decodes all 8 addresses,
not only the 2 it needs. This is a backport from Linux 2.6.20.


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@4263 7894878c-1315-0410-8ee3-d5d059ff63e0

CHANGES

@@ -14,6 +14,7 @@ SVN HEAD
   Man page i2cdetect.8: Describe the output convention
   Man page sensors.1: Update (option -c) and clean up
   Module i2c-i801: Add ICH9 support
+  Module f71805f: Fix the device address decoding (2.6 backport)
   Module icspll: Delete. It was useless and dangerous.
   Program eepromer: Fix loads of warnings
   Program i2cdetect: Make the output clearer

kernel/chips/f71805f.c

@@ -99,9 +99,9 @@ superio_exit(int base)
  * ISA constants
  */
 
-#define REGION_LENGTH		2
-#define ADDR_REG_OFFSET		0
-#define DATA_REG_OFFSET		1
+#define REGION_LENGTH		8
+#define ADDR_REG_OFFSET		5
+#define DATA_REG_OFFSET		6
 
 /*
  * Registers
@@ -722,6 +722,7 @@ static int __init f71805f_find(int sioaddr, unsigned int *address)
 		       "skipping\n");
 		goto exit;
 	}
+	*address &= ~(REGION_LENGTH - 1);	/* Ignore 3 LSB */
 
 	err = 0;
 	printk(KERN_INFO DRVNAME ": Found F71805F chip at %#x, revision %u\n",