hwmon: (max1619) Convert to a new-style i2c driver
The new-style max1619 driver implements the optional detect() callback
to cover the use cases of the legacy driver.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Alexey Fisher <fishor@mail.ru>
diff --git a/drivers/hwmon/max1619.c b/drivers/hwmon/max1619.c
index 7e7267a..1ab1cac 100644
--- a/drivers/hwmon/max1619.c
+++ b/drivers/hwmon/max1619.c
@@ -79,23 +79,34 @@
* Functions declaration
*/
-static int max1619_attach_adapter(struct i2c_adapter *adapter);
-static int max1619_detect(struct i2c_adapter *adapter, int address,
- int kind);
+static int max1619_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int max1619_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info);
static void max1619_init_client(struct i2c_client *client);
-static int max1619_detach_client(struct i2c_client *client);
+static int max1619_remove(struct i2c_client *client);
static struct max1619_data *max1619_update_device(struct device *dev);
/*
* Driver data (common to all clients)
*/
+static const struct i2c_device_id max1619_id[] = {
+ { "max1619", max1619 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max1619_id);
+
static struct i2c_driver max1619_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "max1619",
},
- .attach_adapter = max1619_attach_adapter,
- .detach_client = max1619_detach_client,
+ .probe = max1619_probe,
+ .remove = max1619_remove,
+ .id_table = max1619_id,
+ .detect = max1619_detect,
+ .address_data = &addr_data,
};
/*
@@ -103,7 +114,6 @@
*/
struct max1619_data {
- struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* zero until following fields are valid */
@@ -208,41 +218,15 @@
* Real code
*/
-static int max1619_attach_adapter(struct i2c_adapter *adapter)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int max1619_detect(struct i2c_client *new_client, int kind,
+ struct i2c_board_info *info)
{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_probe(adapter, &addr_data, max1619_detect);
-}
-
-/*
- * The following function does more than just detection. If detection
- * succeeds, it also registers the new chip.
- */
-static int max1619_detect(struct i2c_adapter *adapter, int address, int kind)
-{
- struct i2c_client *new_client;
- struct max1619_data *data;
- int err = 0;
- const char *name = "";
+ struct i2c_adapter *adapter = new_client->adapter;
u8 reg_config=0, reg_convrate=0, reg_status=0;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
- goto exit;
-
- if (!(data = kzalloc(sizeof(struct max1619_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto exit;
- }
-
- /* The common I2C client data is placed right before the
- MAX1619-specific data. */
- new_client = &data->client;
- i2c_set_clientdata(new_client, data);
- new_client->addr = address;
- new_client->adapter = adapter;
- new_client->driver = &max1619_driver;
- new_client->flags = 0;
+ return -ENODEV;
/*
* Now we do the remaining detection. A negative kind means that
@@ -265,8 +249,8 @@
|| reg_convrate > 0x07 || (reg_status & 0x61 ) !=0x00) {
dev_dbg(&adapter->dev,
"MAX1619 detection failed at 0x%02x.\n",
- address);
- goto exit_free;
+ new_client->addr);
+ return -ENODEV;
}
}
@@ -285,28 +269,37 @@
dev_info(&adapter->dev,
"Unsupported chip (man_id=0x%02X, "
"chip_id=0x%02X).\n", man_id, chip_id);
- goto exit_free;
+ return -ENODEV;
}
}
- if (kind == max1619)
- name = "max1619";
+ strlcpy(info->type, "max1619", I2C_NAME_SIZE);
- /* We can fill in the remaining client fields */
- strlcpy(new_client->name, name, I2C_NAME_SIZE);
+ return 0;
+}
+
+static int max1619_probe(struct i2c_client *new_client,
+ const struct i2c_device_id *id)
+{
+ struct max1619_data *data;
+ int err;
+
+ data = kzalloc(sizeof(struct max1619_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ i2c_set_clientdata(new_client, data);
data->valid = 0;
mutex_init(&data->update_lock);
- /* Tell the I2C layer a new client has arrived */
- if ((err = i2c_attach_client(new_client)))
- goto exit_free;
-
/* Initialize the MAX1619 chip */
max1619_init_client(new_client);
/* Register sysfs hooks */
if ((err = sysfs_create_group(&new_client->dev.kobj, &max1619_group)))
- goto exit_detach;
+ goto exit_free;
data->hwmon_dev = hwmon_device_register(&new_client->dev);
if (IS_ERR(data->hwmon_dev)) {
@@ -318,8 +311,6 @@
exit_remove_files:
sysfs_remove_group(&new_client->dev.kobj, &max1619_group);
-exit_detach:
- i2c_detach_client(new_client);
exit_free:
kfree(data);
exit:
@@ -341,17 +332,13 @@
config & 0xBF); /* run */
}
-static int max1619_detach_client(struct i2c_client *client)
+static int max1619_remove(struct i2c_client *client)
{
struct max1619_data *data = i2c_get_clientdata(client);
- int err;
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &max1619_group);
- if ((err = i2c_detach_client(client)))
- return err;
-
kfree(data);
return 0;
}