hwmon: (lm63) Convert to a new-style i2c driver
The new-style lm63 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/lm63.c b/drivers/hwmon/lm63.c
index 1162870..3195a26 100644
--- a/drivers/hwmon/lm63.c
+++ b/drivers/hwmon/lm63.c
@@ -1,7 +1,7 @@
/*
* lm63.c - driver for the National Semiconductor LM63 temperature sensor
* with integrated fan control
- * Copyright (C) 2004-2006 Jean Delvare <khali@linux-fr.org>
+ * Copyright (C) 2004-2008 Jean Delvare <khali@linux-fr.org>
* Based on the lm90 driver.
*
* The LM63 is a sensor chip made by National Semiconductor. It measures
@@ -128,24 +128,36 @@
* Functions declaration
*/
-static int lm63_attach_adapter(struct i2c_adapter *adapter);
-static int lm63_detach_client(struct i2c_client *client);
+static int lm63_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int lm63_remove(struct i2c_client *client);
static struct lm63_data *lm63_update_device(struct device *dev);
-static int lm63_detect(struct i2c_adapter *adapter, int address, int kind);
+static int lm63_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info);
static void lm63_init_client(struct i2c_client *client);
/*
* Driver data (common to all clients)
*/
+static const struct i2c_device_id lm63_id[] = {
+ { "lm63", lm63 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lm63_id);
+
static struct i2c_driver lm63_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "lm63",
},
- .attach_adapter = lm63_attach_adapter,
- .detach_client = lm63_detach_client,
+ .probe = lm63_probe,
+ .remove = lm63_remove,
+ .id_table = lm63_id,
+ .detect = lm63_detect,
+ .address_data = &addr_data,
};
/*
@@ -153,7 +165,6 @@
*/
struct lm63_data {
- struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* zero until following fields are valid */
@@ -411,43 +422,14 @@
* Real code
*/
-static int lm63_attach_adapter(struct i2c_adapter *adapter)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int lm63_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, lm63_detect);
-}
-
-/*
- * The following function does more than just detection. If detection
- * succeeds, it also registers the new chip.
- */
-static int lm63_detect(struct i2c_adapter *adapter, int address, int kind)
-{
- struct i2c_client *new_client;
- struct lm63_data *data;
- int err = 0;
+ struct i2c_adapter *adapter = new_client->adapter;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
- goto exit;
-
- if (!(data = kzalloc(sizeof(struct lm63_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto exit;
- }
-
- /* The common I2C client data is placed right before the
- LM63-specific data. */
- new_client = &data->client;
- i2c_set_clientdata(new_client, data);
- new_client->addr = address;
- new_client->adapter = adapter;
- new_client->driver = &lm63_driver;
- new_client->flags = 0;
-
- /* Default to an LM63 if forced */
- if (kind == 0)
- kind = lm63;
+ return -ENODEV;
if (kind < 0) { /* must identify */
u8 man_id, chip_id, reg_config1, reg_config2;
@@ -477,25 +459,38 @@
dev_dbg(&adapter->dev, "Unsupported chip "
"(man_id=0x%02X, chip_id=0x%02X).\n",
man_id, chip_id);
- goto exit_free;
+ return -ENODEV;
}
}
- strlcpy(new_client->name, "lm63", I2C_NAME_SIZE);
+ strlcpy(info->type, "lm63", I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static int lm63_probe(struct i2c_client *new_client,
+ const struct i2c_device_id *id)
+{
+ struct lm63_data *data;
+ int err;
+
+ data = kzalloc(sizeof(struct lm63_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 LM63 chip */
lm63_init_client(new_client);
/* Register sysfs hooks */
if ((err = sysfs_create_group(&new_client->dev.kobj,
&lm63_group)))
- goto exit_detach;
+ goto exit_free;
if (data->config & 0x04) { /* tachometer enabled */
if ((err = sysfs_create_group(&new_client->dev.kobj,
&lm63_group_fan1)))
@@ -513,8 +508,6 @@
exit_remove_files:
sysfs_remove_group(&new_client->dev.kobj, &lm63_group);
sysfs_remove_group(&new_client->dev.kobj, &lm63_group_fan1);
-exit_detach:
- i2c_detach_client(new_client);
exit_free:
kfree(data);
exit:
@@ -556,18 +549,14 @@
(data->config_fan & 0x20) ? "manual" : "auto");
}
-static int lm63_detach_client(struct i2c_client *client)
+static int lm63_remove(struct i2c_client *client)
{
struct lm63_data *data = i2c_get_clientdata(client);
- int err;
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &lm63_group);
sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1);
- if ((err = i2c_detach_client(client)))
- return err;
-
kfree(data);
return 0;
}