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Commit 65817ed8 authored by Jean Delvare's avatar Jean Delvare Committed by Jean Delvare
Browse files

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



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

Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
parent 369932f6

drivers/hwmon/adm1021.c

+53 −52
Original line number Diff line number Diff line
@@ -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;

	}



	/* 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;

		return -ENODEV;

	}



	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;

	mutex_init(&data->update_lock);

	return 0;

}



	/* Tell the I2C layer a new client has arrived */

	if ((err = i2c_attach_client(client)))

		goto error1;

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);



	/* 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;

}