aboutsummaryrefslogtreecommitdiffstats
path: root/Documentation/i2c
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/i2c')
-rw-r--r--Documentation/i2c/writing-clients18
1 files changed, 14 insertions, 4 deletions
diff --git a/Documentation/i2c/writing-clients b/Documentation/i2c/writing-clients
index ee75cbace28d..d4cd4126d1ad 100644
--- a/Documentation/i2c/writing-clients
+++ b/Documentation/i2c/writing-clients
@@ -25,12 +25,23 @@ routines, and should be zero-initialized except for fields with data you
25provide. A client structure holds device-specific information like the 25provide. A client structure holds device-specific information like the
26driver model device node, and its I2C address. 26driver model device node, and its I2C address.
27 27
28/* iff driver uses driver model ("new style") binding model: */
29
30static struct i2c_device_id foo_idtable[] = {
31 { "foo", my_id_for_foo },
32 { "bar", my_id_for_bar },
33 { }
34};
35
36MODULE_DEVICE_TABLE(i2c, foo_idtable);
37
28static struct i2c_driver foo_driver = { 38static struct i2c_driver foo_driver = {
29 .driver = { 39 .driver = {
30 .name = "foo", 40 .name = "foo",
31 }, 41 },
32 42
33 /* iff driver uses driver model ("new style") binding model: */ 43 /* iff driver uses driver model ("new style") binding model: */
44 .id_table = foo_ids,
34 .probe = foo_probe, 45 .probe = foo_probe,
35 .remove = foo_remove, 46 .remove = foo_remove,
36 47
@@ -173,10 +184,9 @@ handle may be used during foo_probe(). If foo_probe() reports success
173(zero not a negative status code) it may save the handle and use it until 184(zero not a negative status code) it may save the handle and use it until
174foo_remove() returns. That binding model is used by most Linux drivers. 185foo_remove() returns. That binding model is used by most Linux drivers.
175 186
176Drivers match devices when i2c_client.driver_name and the driver name are 187The probe function is called when an entry in the id_table name field
177the same; this approach is used in several other busses that don't have 188matches the device's name. It is passed the entry that was matched so
178device typing support in the hardware. The driver and module name should 189the driver knows which one in the table matched.
179match, so hotplug/coldplug mechanisms will modprobe the driver.
180 190
181 191
182Device Creation (Standard driver model) 192Device Creation (Standard driver model)