hwmon: (gl518sm) Convert to a new-style i2c driver
The new-style gl518sm 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/gl518sm.c b/drivers/hwmon/gl518sm.c
index 33e9e8a..7820df4 100644
--- a/drivers/hwmon/gl518sm.c
+++ b/drivers/hwmon/gl518sm.c
@@ -114,7 +114,6 @@
/* Each client has this additional data */
struct gl518_data {
- struct i2c_client client;
struct device *hwmon_dev;
enum chips type;
@@ -138,21 +137,33 @@
u8 beep_enable; /* Boolean */
};
-static int gl518_attach_adapter(struct i2c_adapter *adapter);
-static int gl518_detect(struct i2c_adapter *adapter, int address, int kind);
+static int gl518_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int gl518_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info);
static void gl518_init_client(struct i2c_client *client);
-static int gl518_detach_client(struct i2c_client *client);
+static int gl518_remove(struct i2c_client *client);
static int gl518_read_value(struct i2c_client *client, u8 reg);
static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value);
static struct gl518_data *gl518_update_device(struct device *dev);
+static const struct i2c_device_id gl518_id[] = {
+ { "gl518sm", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, gl518_id);
+
/* This is the driver that will be inserted */
static struct i2c_driver gl518_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "gl518sm",
},
- .attach_adapter = gl518_attach_adapter,
- .detach_client = gl518_detach_client,
+ .probe = gl518_probe,
+ .remove = gl518_remove,
+ .id_table = gl518_id,
+ .detect = gl518_detect,
+ .address_data = &addr_data,
};
/*
@@ -472,46 +483,23 @@
* Real code
*/
-static int gl518_attach_adapter(struct i2c_adapter *adapter)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int gl518_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info)
{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_probe(adapter, &addr_data, gl518_detect);
-}
-
-static int gl518_detect(struct i2c_adapter *adapter, int address, int kind)
-{
+ struct i2c_adapter *adapter = client->adapter;
int i;
- struct i2c_client *client;
- struct gl518_data *data;
- int err = 0;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_WORD_DATA))
- goto exit;
-
- /* OK. For now, we presume we have a valid client. We now create the
- client structure, even though we cannot fill it completely yet.
- But it allows us to access gl518_{read,write}_value. */
-
- if (!(data = kzalloc(sizeof(struct gl518_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto exit;
- }
-
- client = &data->client;
- i2c_set_clientdata(client, data);
-
- client->addr = address;
- client->adapter = adapter;
- client->driver = &gl518_driver;
+ return -ENODEV;
/* Now, we do the remaining detection. */
if (kind < 0) {
if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80)
|| (gl518_read_value(client, GL518_REG_CONF) & 0x80))
- goto exit_free;
+ return -ENODEV;
}
/* Determine the chip type. */
@@ -526,19 +514,32 @@
dev_info(&adapter->dev,
"Ignoring 'force' parameter for unknown "
"chip at adapter %d, address 0x%02x\n",
- i2c_adapter_id(adapter), address);
- goto exit_free;
+ i2c_adapter_id(adapter), client->addr);
+ return -ENODEV;
}
}
- /* Fill in the remaining client fields */
- strlcpy(client->name, "gl518sm", I2C_NAME_SIZE);
- data->type = kind;
- mutex_init(&data->update_lock);
+ strlcpy(info->type, "gl518sm", I2C_NAME_SIZE);
- /* Tell the I2C layer a new client has arrived */
- if ((err = i2c_attach_client(client)))
- goto exit_free;
+ return 0;
+}
+
+static int gl518_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct gl518_data *data;
+ int err, revision;
+
+ data = kzalloc(sizeof(struct gl518_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ i2c_set_clientdata(client, data);
+ revision = gl518_read_value(client, GL518_REG_REVISION);
+ data->type = revision == 0x80 ? gl518sm_r80 : gl518sm_r00;
+ mutex_init(&data->update_lock);
/* Initialize the GL518SM chip */
data->alarm_mask = 0xff;
@@ -546,7 +547,7 @@
/* Register sysfs hooks */
if ((err = sysfs_create_group(&client->dev.kobj, &gl518_group)))
- goto exit_detach;
+ goto exit_free;
if (data->type == gl518sm_r80)
if ((err = sysfs_create_group(&client->dev.kobj,
&gl518_group_r80)))
@@ -564,8 +565,6 @@
sysfs_remove_group(&client->dev.kobj, &gl518_group);
if (data->type == gl518sm_r80)
sysfs_remove_group(&client->dev.kobj, &gl518_group_r80);
-exit_detach:
- i2c_detach_client(client);
exit_free:
kfree(data);
exit:
@@ -591,19 +590,15 @@
gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue);
}
-static int gl518_detach_client(struct i2c_client *client)
+static int gl518_remove(struct i2c_client *client)
{
struct gl518_data *data = i2c_get_clientdata(client);
- int err;
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &gl518_group);
if (data->type == gl518sm_r80)
sysfs_remove_group(&client->dev.kobj, &gl518_group_r80);
- if ((err = i2c_detach_client(client)))
- return err;
-
kfree(data);
return 0;
}