Introduced /proc/sys/dev/sensors/chips file

See doc/sysctl for an explanation why it is needed.

Also fixed two very small cleanup bugs in lm75/lm78, which would probably be
impossible to trigger anyway, but still.


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@51 7894878c-1315-0410-8ee3-d5d059ff63e0

kernel/include/sensors.h

@@ -73,10 +73,12 @@ extern int sensors_register_entry(struct i2c_client *client,
                                   const char *prefix, ctl_table *ctl_template);
 extern void sensors_deregister_entry(int id);
 
-
 #endif /* def __KERNEL__ */
 
 
+/* The maximum length of the prefix */
+#define SENSORS_PREFIX_MAX 20
+
 /* Driver IDs */
 #define I2C_DRIVERID_I2CPROC 1001
 #define I2C_DRIVERID_LM78 1002
@@ -90,6 +92,12 @@ extern void sensors_deregister_entry(int id);
                           dev table */
 #endif /* def DEV_HWMON */
 
+#define SENSORS_CHIPS 1
+struct sensors_chips_data {
+  int sysctl_id;
+  char name[SENSORS_PREFIX_MAX + 13];
+};
+
 #define LM78_SYSCTL_IN0 1000  /* Volts * 100 */
 #define LM78_SYSCTL_IN1 1001
 #define LM78_SYSCTL_IN2 1002