Many things, most notable the lm78 module

* Some Makefile changes. doc/makefiles documents most of them.
* The lm78 module now compiles, but it will still crash.
* New module sensors, with general code usable by chip driver modules
* i2c-core: added function i2c_adapter_id(), which returns a (low)
  unique i2c-bus ID.
* lm78.h stuff moved into lm78.c or sensors.h


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@19 7894878c-1315-0410-8ee3-d5d059ff63e0

kernel/include/compat.h

@@ -37,4 +37,20 @@
 #endif
 #endif /* def MODULE */
 
+/* copy_from/to_usr is called memcpy_from/to_fs in 2.0 kernels; perhaps in
+   some early 2.1 kernels too? */
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,1,4))
+#define copy_from_user memcpy_fromfs
+#define copy_to_user memcpy_tofs
+#endif
+
+/* get_user was redefined in 2.1 kernels to use two arguments, and returns
+   an error code */
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,1,4))
+#define get_user_data(to,from) ((to) = get_user(from),0)
+#else
+#define get_user_data(to,from) get_user(to,from)
+#endif
+
+
 #endif /* SENSORS_COMPAT_H */

kernel/include/sensors.h

@@ -20,8 +20,45 @@
 #ifndef SENSORS_SENSORS_H
 #define SENSORS_SENSORS_H
 
+#include <linux/sysctl.h>
+
+#ifdef __KERNEL__
+extern int sensors_register_entry(struct i2c_client *client,
+                                  const char *prefix, ctl_table *ctl_template);
+extern void sensors_deregister_entry(int id);
+extern void sensors_parse_reals(int *nrels, void *buffer, int bufsize,
+                                long *results, int magnitude);
+extern void sensors_write_reals(int nrels,void *buffer,int *bufsize,
+                                long *results, int magnitude);
+
+#endif /* def __KERNEL__ */
+
+
 /* Driver IDs */
 #define I2C_DRIVERID_I2CPROC 1001
 #define I2C_DRIVERID_LM78 1002
 
+/* Sysctl IDs */
+#ifdef DEV_HWMON
+#define DEV_SENSORS DEV_HWMON
+#else /* ndef DEV_HWMOM */
+#define DEV_SENSORS 2  /* The id of the lm_sensors directory within the
+                          dev table */
+#endif /* def DEV_HWMON */
+
+#define LM78_SYSCTL_IN0 1000
+#define LM78_SYSCTL_IN1 1001
+#define LM78_SYSCTL_IN2 1002
+#define LM78_SYSCTL_IN3 1003
+#define LM78_SYSCTL_IN4 1004
+#define LM78_SYSCTL_IN5 1005
+#define LM78_SYSCTL_IN6 1006
+#define LM78_SYSCTL_FAN1 1101
+#define LM78_SYSCTL_FAN2 1102
+#define LM78_SYSCTL_FAN3 1103
+#define LM78_SYSCTL_TEMP 1200
+#define LM78_SYSCTL_VID 1300
+#define LM78_SYSCTL_FAN_DIV 2000
+#define LM78_SYSCTL_ALARMS 2001
+
 #endif /* def SENSORS_SENSORS_H */