The new-style adt7470 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: Darrick J. Wong <djwong at us.ibm.com>
---
drivers/hwmon/adt7470.c | 100 ++++++++++++++++++++++-------------------------
1 file changed, 48 insertions(+), 52 deletions(-)
--- linux-2.6.26-rc9.orig/drivers/hwmon/adt7470.c 2008-07-12 09:20:30.000000000 +0200
+++ linux-2.6.26-rc9/drivers/hwmon/adt7470.c 2008-07-12 10:27:29.000000000 +0200
@@ -138,7 +138,6 @@ I2C_CLIENT_INSMOD_1(adt7470);
#define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID)
struct adt7470_data {
- struct i2c_client client;
struct device *hwmon_dev;
struct attribute_group attrs;
struct mutex lock;
@@ -164,16 +163,28 @@ struct adt7470_data {
u8 pwm_auto_temp[ADT7470_PWM_COUNT];
};
-static int adt7470_attach_adapter(struct i2c_adapter *adapter);
-static int adt7470_detect(struct i2c_adapter *adapter, int address, int kind);
-static int adt7470_detach_client(struct i2c_client *client);
+static int adt7470_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int adt7470_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info);
+static int adt7470_remove(struct i2c_client *client);
+
+static const struct i2c_device_id adt7470_id[] = {
+ { "adt7470", adt7470 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, adt7470_id);
static struct i2c_driver adt7470_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "adt7470",
},
- .attach_adapter = adt7470_attach_adapter,
- .detach_client = adt7470_detach_client,
+ .probe = adt7470_probe,
+ .remove = adt7470_remove,
+ .id_table = adt7470_id,
+ .detect = adt7470_detect,
+ .address_data = &addr_data,
};
/*
@@ -1004,64 +1015,52 @@ static struct attribute *adt7470_attr[]
NULL
};
-static int adt7470_attach_adapter(struct i2c_adapter *adapter)
-{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_probe(adapter, &addr_data, adt7470_detect);
-}
-
-static int adt7470_detect(struct i2c_adapter *adapter, int address, int kind)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int adt7470_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info)
{
- struct i2c_client *client;
- struct adt7470_data *data;
- int err = 0;
+ struct i2c_adapter *adapter = client->adapter;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
- goto exit;
-
- if (!(data = kzalloc(sizeof(struct adt7470_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto exit;
- }
-
- client = &data->client;
- client->addr = address;
- client->adapter = adapter;
- client->driver = &adt7470_driver;
-
- i2c_set_clientdata(client, data);
-
- mutex_init(&data->lock);
+ return -ENODEV;
if (kind <= 0) {
int vendor, device, revision;
vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR);
- if (vendor != ADT7470_VENDOR) {
- err = -ENODEV;
- goto exit_free;
- }
+ if (vendor != ADT7470_VENDOR)
+ return -ENODEV;
device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE);
- if (device != ADT7470_DEVICE) {
- err = -ENODEV;
- goto exit_free;
- }
+ if (device != ADT7470_DEVICE)
+ return -ENODEV;
revision = i2c_smbus_read_byte_data(client,
ADT7470_REG_REVISION);
- if (revision != ADT7470_REVISION) {
- err = -ENODEV;
- goto exit_free;
- }
+ if (revision != ADT7470_REVISION)
+ return -ENODEV;
} else
dev_dbg(&adapter->dev, "detection forced\n");
- strlcpy(client->name, "adt7470", I2C_NAME_SIZE);
+ strlcpy(info->type, "adt7470", I2C_NAME_SIZE);
- if ((err = i2c_attach_client(client)))
- goto exit_free;
+ return 0;
+}
+
+static int adt7470_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct adt7470_data *data;
+ int err;
+
+ data = kzalloc(sizeof(struct adt7470_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->lock);
dev_info(&client->dev, "%s chip found\n", client->name);
@@ -1071,7 +1070,7 @@ static int adt7470_detect(struct i2c_ada
/* Register sysfs hooks */
data->attrs.attrs = adt7470_attr;
if ((err = sysfs_create_group(&client->dev.kobj, &data->attrs)))
- goto exit_detach;
+ goto exit_free;
data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
@@ -1083,21 +1082,18 @@ static int adt7470_detect(struct i2c_ada
exit_remove:
sysfs_remove_group(&client->dev.kobj, &data->attrs);
-exit_detach:
- i2c_detach_client(client);
exit_free:
kfree(data);
exit:
return err;
}
-static int adt7470_detach_client(struct i2c_client *client)
+static int adt7470_remove(struct i2c_client *client)
{
struct adt7470_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &data->attrs);
- i2c_detach_client(client);
kfree(data);
return 0;
}
--
Jean Delvare
