The new-style adm1029 driver implements the optional detect() callback
to cover the use cases of the legacy driver.
Signed-off-by: Jean Delvare <khali at linux-fr.org>
Cc: Corentin Labbe <corentin.labbe at geomatys.fr>
---
drivers/hwmon/adm1029.c | 97 +++++++++++++++++++++--------------------------
1 file changed, 44 insertions(+), 53 deletions(-)
--- linux-2.6.26-rc9.orig/drivers/hwmon/adm1029.c 2008-07-12 09:20:31.000000000 +0200
+++ linux-2.6.26-rc9/drivers/hwmon/adm1029.c 2008-07-12 10:27:32.000000000 +0200
@@ -115,9 +115,11 @@ static const u8 ADM1029_REG_FAN_DIV[] =
* Functions declaration
*/
-static int adm1029_attach_adapter(struct i2c_adapter *adapter);
-static int adm1029_detect(struct i2c_adapter *adapter, int address, int kind);
-static int adm1029_detach_client(struct i2c_client *client);
+static int adm1029_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int adm1029_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info);
+static int adm1029_remove(struct i2c_client *client);
static struct adm1029_data *adm1029_update_device(struct device *dev);
static int adm1029_init_client(struct i2c_client *client);
@@ -125,12 +127,22 @@ static int adm1029_init_client(struct i2
* Driver data (common to all clients)
*/
+static const struct i2c_device_id adm1029_id[] = {
+ { "adm1029", adm1029 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, adm1029_id);
+
static struct i2c_driver adm1029_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "adm1029",
},
- .attach_adapter = adm1029_attach_adapter,
- .detach_client = adm1029_detach_client,
+ .probe = adm1029_probe,
+ .remove = adm1029_remove,
+ .id_table = adm1029_id,
+ .detect = adm1029_detect,
+ .address_data = &addr_data,
};
/*
@@ -138,7 +150,6 @@ static struct i2c_driver adm1029_driver
*/
struct adm1029_data {
- struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* zero until following fields are valid */
@@ -284,37 +295,14 @@ static const struct attribute_group adm1
* Real code
*/
-static int adm1029_attach_adapter(struct i2c_adapter *adapter)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int adm1029_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info)
{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_probe(adapter, &addr_data, adm1029_detect);
-}
+ struct i2c_adapter *adapter = client->adapter;
-/*
- * The following function does more than just detection. If detection
- * succeeds, it also registers the new chip.
- */
-
-static int adm1029_detect(struct i2c_adapter *adapter, int address, int kind)
-{
- struct i2c_client *client;
- struct adm1029_data *data;
- int err = 0;
- const char *name = "";
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
- goto exit;
-
- if (!(data = kzalloc(sizeof(struct adm1029_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto exit;
- }
-
- client = &data->client;
- i2c_set_clientdata(client, data);
- client->addr = address;
- client->adapter = adapter;
- client->driver = &adm1029_driver;
+ return -ENODEV;
/* Now we do the detection and identification. A negative kind
* means that the driver was loaded with no force parameter
@@ -362,32 +350,41 @@ static int adm1029_detect(struct i2c_ada
if (kind <= 0) { /* identification failed */
pr_debug("adm1029: Unsupported chip (man_id=0x%02X, "
"chip_id=0x%02X)\n", man_id, chip_id);
- goto exit_free;
+ return -ENODEV;
}
}
+ strlcpy(info->type, "adm1029", I2C_NAME_SIZE);
- if (kind == adm1029) {
- name = "adm1029";
+ return 0;
+}
+
+static int adm1029_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct adm1029_data *data;
+ int err;
+
+ data = kzalloc(sizeof(struct adm1029_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
}
- /* We can fill in the remaining client fields */
- strlcpy(client->name, name, I2C_NAME_SIZE);
+ i2c_set_clientdata(client, data);
mutex_init(&data->update_lock);
- /* Tell the I2C layer a new client has arrived */
- if ((err = i2c_attach_client(client)))
- goto exit_free;
-
/*
* Initialize the ADM1029 chip
* Check config register
*/
- if (adm1029_init_client(client) == 0)
- goto exit_detach;
+ if (adm1029_init_client(client) == 0) {
+ err = -ENODEV;
+ goto exit_free;
+ }
/* Register sysfs hooks */
if ((err = sysfs_create_group(&client->dev.kobj, &adm1029_group)))
- goto exit_detach;
+ goto exit_free;
data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
@@ -399,8 +396,6 @@ static int adm1029_detect(struct i2c_ada
exit_remove_files:
sysfs_remove_group(&client->dev.kobj, &adm1029_group);
- exit_detach:
- i2c_detach_client(client);
exit_free:
kfree(data);
exit:
@@ -424,17 +419,13 @@ static int adm1029_init_client(struct i2
return 1;
}
-static int adm1029_detach_client(struct i2c_client *client)
+static int adm1029_remove(struct i2c_client *client)
{
struct adm1029_data *data = i2c_get_clientdata(client);
- int err;
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &adm1029_group);
- if ((err = i2c_detach_client(client)))
- return err;
-
kfree(data);
return 0;
}
--
Jean Delvare
