hwmon: (lm83) Convert to a new-style i2c driver
The new-style lm83 driver implements the optional detect() callback
to cover the use cases of the legacy driver.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/hwmon/lm83.c b/drivers/hwmon/lm83.c
index 6a8642f..e59e2d1 100644
--- a/drivers/hwmon/lm83.c
+++ b/drivers/hwmon/lm83.c
@@ -1,7 +1,7 @@
/*
* lm83.c - Part of lm_sensors, Linux kernel modules for hardware
* monitoring
- * Copyright (C) 2003-2006 Jean Delvare <khali@linux-fr.org>
+ * Copyright (C) 2003-2008 Jean Delvare <khali@linux-fr.org>
*
* Heavily inspired from the lm78, lm75 and adm1021 drivers. The LM83 is
* a sensor chip made by National Semiconductor. It reports up to four
@@ -118,21 +118,34 @@
* Functions declaration
*/
-static int lm83_attach_adapter(struct i2c_adapter *adapter);
-static int lm83_detect(struct i2c_adapter *adapter, int address, int kind);
-static int lm83_detach_client(struct i2c_client *client);
+static int lm83_detect(struct i2c_client *new_client, int kind,
+ struct i2c_board_info *info);
+static int lm83_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int lm83_remove(struct i2c_client *client);
static struct lm83_data *lm83_update_device(struct device *dev);
/*
* Driver data (common to all clients)
*/
+static const struct i2c_device_id lm83_id[] = {
+ { "lm83", lm83 },
+ { "lm82", lm82 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lm83_id);
+
static struct i2c_driver lm83_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "lm83",
},
- .attach_adapter = lm83_attach_adapter,
- .detach_client = lm83_detach_client,
+ .probe = lm83_probe,
+ .remove = lm83_remove,
+ .id_table = lm83_id,
+ .detect = lm83_detect,
+ .address_data = &addr_data,
};
/*
@@ -140,7 +153,6 @@
*/
struct lm83_data {
- struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* zero until following fields are valid */
@@ -278,40 +290,15 @@
* Real code
*/
-static int lm83_attach_adapter(struct i2c_adapter *adapter)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int lm83_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, lm83_detect);
-}
-
-/*
- * The following function does more than just detection. If detection
- * succeeds, it also registers the new chip.
- */
-static int lm83_detect(struct i2c_adapter *adapter, int address, int kind)
-{
- struct i2c_client *new_client;
- struct lm83_data *data;
- int err = 0;
+ struct i2c_adapter *adapter = new_client->adapter;
const char *name = "";
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
- goto exit;
-
- if (!(data = kzalloc(sizeof(struct lm83_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto exit;
- }
-
- /* The common I2C client data is placed right after the
- * LM83-specific data. */
- new_client = &data->client;
- i2c_set_clientdata(new_client, data);
- new_client->addr = address;
- new_client->adapter = adapter;
- new_client->driver = &lm83_driver;
- new_client->flags = 0;
+ return -ENODEV;
/* Now we do the detection and identification. A negative kind
* means that the driver was loaded with no force parameter
@@ -335,8 +322,9 @@
((i2c_smbus_read_byte_data(new_client, LM83_REG_R_CONFIG)
& 0x41) != 0x00)) {
dev_dbg(&adapter->dev,
- "LM83 detection failed at 0x%02x.\n", address);
- goto exit_free;
+ "LM83 detection failed at 0x%02x.\n",
+ new_client->addr);
+ return -ENODEV;
}
}
@@ -361,7 +349,7 @@
dev_info(&adapter->dev,
"Unsupported chip (man_id=0x%02X, "
"chip_id=0x%02X).\n", man_id, chip_id);
- goto exit_free;
+ return -ENODEV;
}
}
@@ -372,15 +360,27 @@
name = "lm82";
}
- /* We can fill in the remaining client fields */
- strlcpy(new_client->name, name, I2C_NAME_SIZE);
+ strlcpy(info->type, name, I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static int lm83_probe(struct i2c_client *new_client,
+ const struct i2c_device_id *id)
+{
+ struct lm83_data *data;
+ int err;
+
+ data = kzalloc(sizeof(struct lm83_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;
-
/*
* Register sysfs hooks
* The LM82 can only monitor one external diode which is
@@ -389,9 +389,9 @@
*/
if ((err = sysfs_create_group(&new_client->dev.kobj, &lm83_group)))
- goto exit_detach;
+ goto exit_free;
- if (kind == lm83) {
+ if (id->driver_data == lm83) {
if ((err = sysfs_create_group(&new_client->dev.kobj,
&lm83_group_opt)))
goto exit_remove_files;
@@ -408,26 +408,20 @@
exit_remove_files:
sysfs_remove_group(&new_client->dev.kobj, &lm83_group);
sysfs_remove_group(&new_client->dev.kobj, &lm83_group_opt);
-exit_detach:
- i2c_detach_client(new_client);
exit_free:
kfree(data);
exit:
return err;
}
-static int lm83_detach_client(struct i2c_client *client)
+static int lm83_remove(struct i2c_client *client)
{
struct lm83_data *data = i2c_get_clientdata(client);
- int err;
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &lm83_group);
sysfs_remove_group(&client->dev.kobj, &lm83_group_opt);
- if ((err = i2c_detach_client(client)))
- return err;
-
kfree(data);
return 0;
}
