use /sys/class/i2c-dev/i2c-x/name file if available;

solves problem with drivers that have multiple busses;
      requires Greg's patch (for kernel 2.6.5?)


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@2341 7894878c-1315-0410-8ee3-d5d059ff63e0

CHANGES

@@ -17,6 +17,10 @@ ask CVS about it:
 
 -----------------------------------------------------------------------------
 
+2.8.6 (2004????)
+  Programs i2cdetect, i2cdump, i2cset: Fix incorrect bus names if possible
+
+
 2.8.5 (20040305)
   File doc/chips/SUMMARY: Update
   File etc/sensors.conf.eg: Epox 8K3A tweaks. (Kronos)

prog/dump/i2cbusses.c

@@ -90,11 +90,19 @@ void print_i2c_busses(int procfmt)
 		if (!strcmp(de->d_name, ".."))
 			continue;
 
-		/* this seems to work for ISA */
-		sprintf(n, "%s/%s/device/name", sysfs, de->d_name);
+		/* this should work for kernels 2.6.5 or higher and */
+		/* is preferred because is unambiguous */
+		sprintf(n, "%s/%s/name", sysfs, de->d_name);
 		f = fopen(n, "r");
+		/* this seems to work for ISA */
+		if(f == NULL) {
+			sprintf(n, "%s/%s/device/name", sysfs, de->d_name);
+			f = fopen(n, "r");
+		}
+		/* non-ISA is much harder */
+		/* and this won't find the correct bus name if a driver
+		   has more than one bus */
 		if(f == NULL) {
-			/* non-ISA is much harder */
 			sprintf(n, "%s/%s/device", sysfs, de->d_name);
 			if(!(ddir = opendir(n)))
 				continue;