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hwmon: (adm1021) Convert to a new-style i2c driver

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The new-style adm1021 driver implements the optional detect() callback
to cover the use cases of the legacy driver.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Jean Delvare 2008-07-16 19:30:08 +02:00 committed by Jean Delvare
parent 369932f6f8
commit 65817ed8d1
1 changed files with 53 additions and 52 deletions
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105
drivers/hwmon/adm1021.c
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@ -78,7 +78,6 @@ clearing it. Weird, ey? --Phil */
/* Each client has this additional data */
struct adm1021_data {
struct i2c_client client;
struct device *hwmon_dev;
enum chips type;
@ -98,23 +97,42 @@ struct adm1021_data {
u8 remote_temp_offset_prec;
};
static int adm1021_attach_adapter(struct i2c_adapter *adapter);
static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind);
static int adm1021_probe(struct i2c_client *client,
const struct i2c_device_id *id);
static int adm1021_detect(struct i2c_client *client, int kind,
struct i2c_board_info *info);
static void adm1021_init_client(struct i2c_client *client);
static int adm1021_detach_client(struct i2c_client *client);
static int adm1021_remove(struct i2c_client *client);
static struct adm1021_data *adm1021_update_device(struct device *dev);
/* (amalysh) read only mode, otherwise any limit's writing confuse BIOS */
static int read_only;
static const struct i2c_device_id adm1021_id[] = {
{ "adm1021", adm1021 },
{ "adm1023", adm1023 },
{ "max1617", max1617 },
{ "max1617a", max1617a },
{ "thmc10", thmc10 },
{ "lm84", lm84 },
{ "gl523sm", gl523sm },
{ "mc1066", mc1066 },
{ }
};
MODULE_DEVICE_TABLE(i2c, adm1021_id);
/* This is the driver that will be inserted */
static struct i2c_driver adm1021_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "adm1021",
},
.attach_adapter = adm1021_attach_adapter,
.detach_client = adm1021_detach_client,
.probe = adm1021_probe,
.remove = adm1021_remove,
.id_table = adm1021_id,
.detect = adm1021_detect,
.address_data = &addr_data,
};
static ssize_t show_temp(struct device *dev,
@ -216,13 +234,6 @@ static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
static int adm1021_attach_adapter(struct i2c_adapter *adapter)
{
if (!(adapter->class & I2C_CLASS_HWMON))
return 0;
return i2c_probe(adapter, &addr_data, adm1021_detect);
}
static struct attribute *adm1021_attributes[] = {
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp1_min.dev_attr.attr,
@ -243,36 +254,21 @@ static const struct attribute_group adm1021_group = {
.attrs = adm1021_attributes,
};
static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind)
/* Return 0 if detection is successful, -ENODEV otherwise */
static int adm1021_detect(struct i2c_client *client, int kind,
struct i2c_board_info *info)
{
struct i2c_adapter *adapter = client->adapter;
int i;
struct i2c_client *client;
struct adm1021_data *data;
int err = 0;
const char *type_name = "";
int conv_rate, status, config;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
pr_debug("adm1021: detect failed, "
"smbus byte data not supported!\n");
goto error0;
return -ENODEV;
}
/* 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 adm1021 register values. */
if (!(data = kzalloc(sizeof(struct adm1021_data), GFP_KERNEL))) {
pr_debug("adm1021: detect failed, kzalloc failed!\n");
err = -ENOMEM;
goto error0;
}
client = &data->client;
i2c_set_clientdata(client, data);
client->addr = address;
client->adapter = adapter;
client->driver = &adm1021_driver;
status = i2c_smbus_read_byte_data(client, ADM1021_REG_STATUS);
conv_rate = i2c_smbus_read_byte_data(client,
ADM1021_REG_CONV_RATE_R);
@ -284,8 +280,7 @@ static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind)
|| (conv_rate & 0xF8) != 0x00) {
pr_debug("adm1021: detect failed, "
"chip not detected!\n");
err = -ENODEV;
goto error1;
return -ENODEV;
}
}
@ -336,24 +331,36 @@ static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind)
type_name = "mc1066";
}
pr_debug("adm1021: Detected chip %s at adapter %d, address 0x%02x.\n",
type_name, i2c_adapter_id(adapter), address);
type_name, i2c_adapter_id(adapter), client->addr);
strlcpy(info->type, type_name, I2C_NAME_SIZE);
/* Fill in the remaining client fields */
strlcpy(client->name, type_name, I2C_NAME_SIZE);
data->type = kind;
return 0;
}
static int adm1021_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct adm1021_data *data;
int err;
data = kzalloc(sizeof(struct adm1021_data), GFP_KERNEL);
if (!data) {
pr_debug("adm1021: detect failed, kzalloc failed!\n");
err = -ENOMEM;
goto error0;
}
i2c_set_clientdata(client, data);
data->type = id->driver_data;
mutex_init(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(client)))
goto error1;
/* Initialize the ADM1021 chip */
if (kind != lm84 && !read_only)
if (data->type != lm84 && !read_only)
adm1021_init_client(client);
/* Register sysfs hooks */
if ((err = sysfs_create_group(&client->dev.kobj, &adm1021_group)))
goto error2;
goto error1;
data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
@ -365,8 +372,6 @@ static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind)
error3:
sysfs_remove_group(&client->dev.kobj, &adm1021_group);
error2:
i2c_detach_client(client);
error1:
kfree(data);
error0:
@ -382,17 +387,13 @@ static void adm1021_init_client(struct i2c_client *client)
i2c_smbus_write_byte_data(client, ADM1021_REG_CONV_RATE_W, 0x04);
}
static int adm1021_detach_client(struct i2c_client *client)
static int adm1021_remove(struct i2c_client *client)
{
struct adm1021_data *data = i2c_get_clientdata(client);
int err;
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &adm1021_group);
if ((err = i2c_detach_client(client)))
return err;
kfree(data);
return 0;
}