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Example lm_sensors-2 driver

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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
This commit is contained in:
Frodo Looijaard committed 1998-11-26 10:16:08 +00:00
1 parent 4d29df9f32
commit 45d6e40e75
12 files changed
+75 -46
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kernel/include/i2c-isa.h
+3 -1
View File
@@ -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) \
kernel/include/isa.h
+3 -1
View File
@@ -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) \
kernel/include/smbus.h
+16 -12
View File
@@ -130,6 +130,8 @@ struct smbus_adapter {
course. */
#define i2c_is_smbus_client(clientptr) \
((clientptr)->adapter->algo->id == ALGO_SMBUS)
#define i2c_is_smbus_adapter(adapptr) \
((adapptr)->algo->id == ALGO_SMBUS)
/* This union is used within smbus_access routines */
union smbus_data {
@@ -157,21 +159,23 @@ extern struct smbus_algorithm smbus_algorithm;
/* This is the very generalized SMBus access routine. You probably do not
want to use this, though; one of the functions below may be much easier,
and probably just as fast. */
extern s32 smbus_access (struct smbus_adapter * adapter, u8 addr,
and probably just as fast.
Note that we use i2c_adapter here, because you do not need a specific
smbus adapter to call this function. */
extern s32 smbus_access (struct i2c_adapter * adapter, u8 addr,
char read_write, u8 command, int size,
union smbus_data * data);
/* Now follow the 'nice' access routines. These also document the calling
conventions of smbus_access. */
extern inline s32 smbus_write_quick(struct smbus_adapter * adapter, u8 addr,
extern inline s32 smbus_write_quick(struct i2c_adapter * adapter, u8 addr,
u8 value)
{
return smbus_access(adapter,addr,value,0,SMBUS_QUICK,NULL);
}
extern inline s32 smbus_read_byte(struct smbus_adapter * adapter,u8 addr)
extern inline s32 smbus_read_byte(struct i2c_adapter * adapter,u8 addr)
{
union smbus_data data;
if (smbus_access(adapter,addr,SMBUS_READ,0,SMBUS_BYTE,&data))
@@ -180,13 +184,13 @@ extern inline s32 smbus_read_byte(struct smbus_adapter * adapter,u8 addr)
return data.byte;
}
extern inline s32 smbus_write_byte(struct smbus_adapter * adapter, u8 addr,
extern inline s32 smbus_write_byte(struct i2c_adapter * adapter, u8 addr,
u8 value)
{
return smbus_access(adapter,addr,SMBUS_WRITE,value, SMBUS_BYTE,NULL);
}
extern inline s32 smbus_read_byte_data(struct smbus_adapter * adapter,
extern inline s32 smbus_read_byte_data(struct i2c_adapter * adapter,
u8 addr, u8 command)
{
union smbus_data data;
@@ -196,7 +200,7 @@ extern inline s32 smbus_read_byte_data(struct smbus_adapter * adapter,
return data.byte;
}
extern inline s32 smbus_write_byte_data(struct smbus_adapter * adapter,
extern inline s32 smbus_write_byte_data(struct i2c_adapter * adapter,
u8 addr, u8 command, u8 value)
{
union smbus_data data;
@@ -204,7 +208,7 @@ extern inline s32 smbus_write_byte_data(struct smbus_adapter * adapter,
return smbus_access(adapter,addr,SMBUS_WRITE,command,SMBUS_BYTE_DATA,&data);
}
extern inline s32 smbus_read_word_data(struct smbus_adapter * adapter,
extern inline s32 smbus_read_word_data(struct i2c_adapter * adapter,
u8 addr, u8 command)
{
union smbus_data data;
@@ -214,7 +218,7 @@ extern inline s32 smbus_read_word_data(struct smbus_adapter * adapter,
return data.word;
}
extern inline s32 smbus_write_word_data(struct smbus_adapter * adapter,
extern inline s32 smbus_write_word_data(struct i2c_adapter * adapter,
u8 addr, u8 command, u16 value)
{
union smbus_data data;
@@ -222,7 +226,7 @@ extern inline s32 smbus_write_word_data(struct smbus_adapter * adapter,
return smbus_access(adapter,addr,SMBUS_WRITE,command,SMBUS_WORD_DATA,&data);
}
extern inline s32 smbus_process_call(struct smbus_adapter * adapter,
extern inline s32 smbus_process_call(struct i2c_adapter * adapter,
u8 addr, u8 command, u16 value)
{
union smbus_data data;
@@ -234,7 +238,7 @@ extern inline s32 smbus_process_call(struct smbus_adapter * adapter,
}
/* Returns the number of read bytes */
extern inline s32 smbus_read_block_data(struct smbus_adapter * adapter,
extern inline s32 smbus_read_block_data(struct i2c_adapter * adapter,
u8 addr, u8 command, u8 *values)
{
union smbus_data data;
@@ -248,7 +252,7 @@ extern inline s32 smbus_read_block_data(struct smbus_adapter * adapter,
}
}
extern inline int smbus_write_block_data(struct smbus_adapter * adapter,
extern inline int smbus_write_block_data(struct i2c_adapter * adapter,
u8 addr, u8 command, u8 length,
u8 *values)
{