summaryrefslogtreecommitdiffstats
path: root/Documentation/i2c
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/i2c')
-rw-r--r--Documentation/i2c/writing-clients62
1 files changed, 12 insertions, 50 deletions
diff --git a/Documentation/i2c/writing-clients b/Documentation/i2c/writing-clients
index ad27511..f482dae 100644
--- a/Documentation/i2c/writing-clients
+++ b/Documentation/i2c/writing-clients
@@ -171,45 +171,31 @@ The following lists are used internally:
normal_i2c: filled in by the module writer.
A list of I2C addresses which should normally be examined.
- normal_i2c_range: filled in by the module writer.
- A list of pairs of I2C addresses, each pair being an inclusive range of
- addresses which should normally be examined.
probe: insmod parameter.
A list of pairs. The first value is a bus number (-1 for any I2C bus),
the second is the address. These addresses are also probed, as if they
were in the 'normal' list.
- probe_range: insmod parameter.
- A list of triples. The first value is a bus number (-1 for any I2C bus),
- the second and third are addresses. These form an inclusive range of
- addresses that are also probed, as if they were in the 'normal' list.
ignore: insmod parameter.
A list of pairs. The first value is a bus number (-1 for any I2C bus),
the second is the I2C address. These addresses are never probed.
This parameter overrules 'normal' and 'probe', but not the 'force' lists.
- ignore_range: insmod parameter.
- A list of triples. The first value is a bus number (-1 for any I2C bus),
- the second and third are addresses. These form an inclusive range of
- I2C addresses that are never probed.
- This parameter overrules 'normal' and 'probe', but not the 'force' lists.
force: insmod parameter.
A list of pairs. The first value is a bus number (-1 for any I2C bus),
the second is the I2C address. A device is blindly assumed to be on
the given address, no probing is done.
-Fortunately, as a module writer, you just have to define the `normal'
-and/or `normal_range' parameters. The complete declaration could look
-like this:
+Fortunately, as a module writer, you just have to define the `normal_i2c'
+parameter. The complete declaration could look like this:
- /* Scan 0x20 to 0x2f, 0x37, and 0x40 to 0x4f */
- static unsigned short normal_i2c[] = { 0x37,I2C_CLIENT_END };
- static unsigned short normal_i2c_range[] = { 0x20, 0x2f, 0x40, 0x4f,
- I2C_CLIENT_END };
+ /* Scan 0x37, and 0x48 to 0x4f */
+ static unsigned short normal_i2c[] = { 0x37, 0x48, 0x49, 0x4a, 0x4b, 0x4c,
+ 0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
/* Magic definition of all other variables and things */
I2C_CLIENT_INSMOD;
-Note that you *have* to call the two defined variables `normal_i2c' and
-`normal_i2c_range', without any prefix!
+Note that you *have* to call the defined variable `normal_i2c',
+without any prefix!
Probing classes (sensors)
@@ -223,39 +209,17 @@ The following lists are used internally. They are all lists of integers.
normal_i2c: filled in by the module writer. Terminated by SENSORS_I2C_END.
A list of I2C addresses which should normally be examined.
- normal_i2c_range: filled in by the module writer. Terminated by
- SENSORS_I2C_END
- A list of pairs of I2C addresses, each pair being an inclusive range of
- addresses which should normally be examined.
normal_isa: filled in by the module writer. Terminated by SENSORS_ISA_END.
A list of ISA addresses which should normally be examined.
- normal_isa_range: filled in by the module writer. Terminated by
- SENSORS_ISA_END
- A list of triples. The first two elements are ISA addresses, being an
- range of addresses which should normally be examined. The third is the
- modulo parameter: only addresses which are 0 module this value relative
- to the first address of the range are actually considered.
probe: insmod parameter. Initialize this list with SENSORS_I2C_END values.
A list of pairs. The first value is a bus number (SENSORS_ISA_BUS for
the ISA bus, -1 for any I2C bus), the second is the address. These
addresses are also probed, as if they were in the 'normal' list.
- probe_range: insmod parameter. Initialize this list with SENSORS_I2C_END
- values.
- A list of triples. The first value is a bus number (SENSORS_ISA_BUS for
- the ISA bus, -1 for any I2C bus), the second and third are addresses.
- These form an inclusive range of addresses that are also probed, as
- if they were in the 'normal' list.
ignore: insmod parameter. Initialize this list with SENSORS_I2C_END values.
A list of pairs. The first value is a bus number (SENSORS_ISA_BUS for
the ISA bus, -1 for any I2C bus), the second is the I2C address. These
addresses are never probed. This parameter overrules 'normal' and
'probe', but not the 'force' lists.
- ignore_range: insmod parameter. Initialize this list with SENSORS_I2C_END
- values.
- A list of triples. The first value is a bus number (SENSORS_ISA_BUS for
- the ISA bus, -1 for any I2C bus), the second and third are addresses.
- These form an inclusive range of I2C addresses that are never probed.
- This parameter overrules 'normal' and 'probe', but not the 'force' lists.
Also used is a list of pointers to sensors_force_data structures:
force_data: insmod parameters. A list, ending with an element of which
@@ -269,16 +233,14 @@ Also used is a list of pointers to sensors_force_data structures:
So we have a generic insmod variabled `force', and chip-specific variables
`force_CHIPNAME'.
-Fortunately, as a module writer, you just have to define the `normal'
-and/or `normal_range' parameters, and define what chip names are used.
+Fortunately, as a module writer, you just have to define the `normal_i2c'
+and `normal_isa' parameters, and define what chip names are used.
The complete declaration could look like this:
- /* Scan i2c addresses 0x20 to 0x2f, 0x37, and 0x40 to 0x4f
- static unsigned short normal_i2c[] = {0x37,SENSORS_I2C_END};
- static unsigned short normal_i2c_range[] = {0x20,0x2f,0x40,0x4f,
- SENSORS_I2C_END};
+ /* Scan i2c addresses 0x37, and 0x48 to 0x4f */
+ static unsigned short normal_i2c[] = { 0x37, 0x48, 0x49, 0x4a, 0x4b, 0x4c,
+ 0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
/* Scan ISA address 0x290 */
static unsigned int normal_isa[] = {0x0290,SENSORS_ISA_END};
- static unsigned int normal_isa_range[] = {SENSORS_ISA_END};
/* Define chips foo and bar, as well as all module parameters and things */
SENSORS_INSMOD_2(foo,bar);
OpenPOWER on IntegriCloud