Example lm_sensors-2 driver

Though it is called the LM78 driver, there is not too much LM78 specific
code in it; it can better be seen as an example code skeleton for other
drivers. Right now, it creats a file /proc/sensors-test, which contains
a list of busses it registered itself on. Stupid, but very useful for
testing purposes!

You need a 2.0 kernel for lm78.o to insert (or hack the /proc system
specific parts; see lm78.c of lm_sensors version 1 how to do this).
Other parts of lm_sensors-2 are not tested for 2.1 kernels either, but
I am certain it won't work in this case :-).

See the TODO list to get some idea what is left to do, choose something
and implement it. Or not :-). But please, send a note to the mailing
list when you start on something, to avoid duplicate work...

Other notable changes:
  the smbus_access routines now use (the more logical) i2c_adapter
  structure, instead of smbus_adapter.


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@13 7894878c-1315-0410-8ee3-d5d059ff63e0

kernel/include/isa.h

@@ -77,7 +77,7 @@ struct isa_client {
   void *data;
 
   /* Here ended i2c_client */
-  unsigned int full_address;
+  unsigned int isa_addr;
 };
 
 /* An algorithm describes how a certain class of busses can be accessed.
@@ -127,6 +127,8 @@ struct isa_adapter {
   access will fail! */
 #define i2c_is_isa_client(clientptr) \
         ((clientptr)->adapter->algo->id == ALGO_ISA)
+#define i2c_is_isa_adapter(adapptr) \
+        ((adapptr)->algo->id == ALGO_ISA)
 
 /* Next: define ISA variants of registering. */
 #define isa_add_algorithm(algoptr) \