hwmon: (lm92) Convert to a new-style i2c driver
The new-style lm92 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/lm92.c b/drivers/hwmon/lm92.c
index c31942e..b2e00c5 100644
--- a/drivers/hwmon/lm92.c
+++ b/drivers/hwmon/lm92.c
@@ -1,6 +1,6 @@
/*
* lm92 - Hardware monitoring driver
- * Copyright (C) 2005 Jean Delvare <khali@linux-fr.org>
+ * Copyright (C) 2005-2008 Jean Delvare <khali@linux-fr.org>
*
* Based on the lm90 driver, with some ideas taken from the lm_sensors
* lm92 driver as well.
@@ -96,7 +96,6 @@
/* Client data (each client gets its own) */
struct lm92_data {
- struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* zero until following fields are valid */
@@ -319,32 +318,15 @@
.attrs = lm92_attributes,
};
-/* The following function does more than just detection. If detection
- succeeds, it also registers the new chip. */
-static int lm92_detect(struct i2c_adapter *adapter, int address, int kind)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int lm92_detect(struct i2c_client *new_client, int kind,
+ struct i2c_board_info *info)
{
- struct i2c_client *new_client;
- struct lm92_data *data;
- int err = 0;
- char *name;
+ struct i2c_adapter *adapter = new_client->adapter;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA
| I2C_FUNC_SMBUS_WORD_DATA))
- goto exit;
-
- if (!(data = kzalloc(sizeof(struct lm92_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto exit;
- }
-
- /* Fill in enough client fields so that we can read from the chip,
- which is required for identication */
- new_client = &data->client;
- i2c_set_clientdata(new_client, data);
- new_client->addr = address;
- new_client->adapter = adapter;
- new_client->driver = &lm92_driver;
- new_client->flags = 0;
+ return -ENODEV;
/* A negative kind means that the driver was loaded with no force
parameter (default), so we must identify the chip. */
@@ -364,34 +346,36 @@
kind = lm92; /* No separate prefix */
}
else
- goto exit_free;
- } else
- if (kind == 0) /* Default to an LM92 if forced */
- kind = lm92;
-
- /* Give it the proper name */
- if (kind == lm92) {
- name = "lm92";
- } else { /* Supposedly cannot happen */
- dev_dbg(&new_client->dev, "Kind out of range?\n");
- goto exit_free;
+ return -ENODEV;
}
- /* Fill in the remaining client fields */
- strlcpy(new_client->name, name, I2C_NAME_SIZE);
+ strlcpy(info->type, "lm92", I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static int lm92_probe(struct i2c_client *new_client,
+ const struct i2c_device_id *id)
+{
+ struct lm92_data *data;
+ int err;
+
+ data = kzalloc(sizeof(struct lm92_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 subsystem a new client has arrived */
- if ((err = i2c_attach_client(new_client)))
- goto exit_free;
-
/* Initialize the chipset */
lm92_init_client(new_client);
/* Register sysfs hooks */
if ((err = sysfs_create_group(&new_client->dev.kobj, &lm92_group)))
- goto exit_detach;
+ goto exit_free;
data->hwmon_dev = hwmon_device_register(&new_client->dev);
if (IS_ERR(data->hwmon_dev)) {
@@ -403,32 +387,19 @@
exit_remove:
sysfs_remove_group(&new_client->dev.kobj, &lm92_group);
-exit_detach:
- i2c_detach_client(new_client);
exit_free:
kfree(data);
exit:
return err;
}
-static int lm92_attach_adapter(struct i2c_adapter *adapter)
-{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_probe(adapter, &addr_data, lm92_detect);
-}
-
-static int lm92_detach_client(struct i2c_client *client)
+static int lm92_remove(struct i2c_client *client)
{
struct lm92_data *data = i2c_get_clientdata(client);
- int err;
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &lm92_group);
- if ((err = i2c_detach_client(client)))
- return err;
-
kfree(data);
return 0;
}
@@ -438,12 +409,23 @@
* Module and driver stuff
*/
+static const struct i2c_device_id lm92_id[] = {
+ { "lm92", lm92 },
+ /* max6635 could be added here */
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lm92_id);
+
static struct i2c_driver lm92_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "lm92",
},
- .attach_adapter = lm92_attach_adapter,
- .detach_client = lm92_detach_client,
+ .probe = lm92_probe,
+ .remove = lm92_remove,
+ .id_table = lm92_id,
+ .detect = lm92_detect,
+ .address_data = &addr_data,
};
static int __init sensors_lm92_init(void)