(Phil) It should now handle negative temps going to and from registers.

I tested the new macros from a simple stand alone C app, but actual
system testing is still desired.


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@852 7894878c-1315-0410-8ee3-d5d059ff63e0

kernel/chips/lm75.c

@@ -58,7 +58,7 @@ SENSORS_INSMOD_1(lm75);
    these macros are called: arguments may be evaluated more than once.
    Fixing this is just not worth it. */
 #define TEMP_FROM_REG(val) ((((val & 0x7fff) >> 7) * 5) | ((val & 0x8000)?-256:0))
-#define TEMP_TO_REG(val)   (SENSORS_LIMIT(((((val) + 2) / 5) << 7),0,0xffff))
+#define TEMP_TO_REG(val)   (SENSORS_LIMIT((val<0?(0x200+((val)/5))<<7:(((val) + 2) / 5) << 7),0,0xffff))
 
 /* Initial values */
 #define LM75_INIT_TEMP_OS 600