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Commit 57f7eb0b authored by Jean Delvare's avatar Jean Delvare Committed by Jean Delvare
Browse files

hwmon: (adm1026) Convert to a new-style i2c driver 



The new-style adm1026 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 7dbafe02

drivers/hwmon/adm1026.c

+44 −65
Original line number Diff line number Diff line
@@ -259,7 +259,6 @@ struct pwm_data { 
};



struct adm1026_data {

	struct i2c_client client;

	struct device *hwmon_dev;



	struct mutex update_lock;
@@ -293,10 +292,11 @@ struct adm1026_data { 
	u8 config3;		/* Register value */

};



static int adm1026_attach_adapter(struct i2c_adapter *adapter);

static int adm1026_detect(struct i2c_adapter *adapter, int address,

	int kind);

static int adm1026_detach_client(struct i2c_client *client);

static int adm1026_probe(struct i2c_client *client,

			 const struct i2c_device_id *id);

static int adm1026_detect(struct i2c_client *client, int kind,

			  struct i2c_board_info *info);

static int adm1026_remove(struct i2c_client *client);

static int adm1026_read_value(struct i2c_client *client, u8 reg);

static int adm1026_write_value(struct i2c_client *client, u8 reg, int value);

static void adm1026_print_gpio(struct i2c_client *client);
@@ -305,22 +305,24 @@ static struct adm1026_data *adm1026_update_device(struct device *dev); 
static void adm1026_init_client(struct i2c_client *client);





static const struct i2c_device_id adm1026_id[] = {

	{ "adm1026", adm1026 },

	{ }

};

MODULE_DEVICE_TABLE(i2c, adm1026_id);



static struct i2c_driver adm1026_driver = {

	.class		= I2C_CLASS_HWMON,

	.driver = {

		.name	= "adm1026",

	},

	.attach_adapter = adm1026_attach_adapter,

	.detach_client	= adm1026_detach_client,

	.probe		= adm1026_probe,

	.remove		= adm1026_remove,

	.id_table	= adm1026_id,

	.detect		= adm1026_detect,

	.address_data	= &addr_data,

};



static int adm1026_attach_adapter(struct i2c_adapter *adapter)

{

	if (!(adapter->class & I2C_CLASS_HWMON)) {

		return 0;

	}

	return i2c_probe(adapter, &addr_data, adm1026_detect);

}



static int adm1026_read_value(struct i2c_client *client, u8 reg)

{

	int res;
@@ -1647,48 +1649,32 @@ static const struct attribute_group adm1026_group_in8_9 = { 
	.attrs = adm1026_attributes_in8_9,

};



static int adm1026_detect(struct i2c_adapter *adapter, int address,

			  int kind)

/* Return 0 if detection is successful, -ENODEV otherwise */

static int adm1026_detect(struct i2c_client *client, int kind,

			  struct i2c_board_info *info)

{

	struct i2c_adapter *adapter = client->adapter;

	int address = client->addr;

	int company, verstep;

	struct i2c_client *client;

	struct adm1026_data *data;

	int err = 0;

	const char *type_name = "";



	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {

		/* We need to be able to do byte I/O */

		goto exit;

		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 adm1026_{read,write}_value. */



	if (!(data = kzalloc(sizeof(struct adm1026_data), GFP_KERNEL))) {

		err = -ENOMEM;

		goto exit;

	}



	client = &data->client;

	i2c_set_clientdata(client, data);

	client->addr = address;

	client->adapter = adapter;

	client->driver = &adm1026_driver;



	/* Now, we do the remaining detection. */



	company = adm1026_read_value(client, ADM1026_REG_COMPANY);

	verstep = adm1026_read_value(client, ADM1026_REG_VERSTEP);



	dev_dbg(&client->dev, "Detecting device at %d,0x%02x with"

	dev_dbg(&adapter->dev, "Detecting device at %d,0x%02x with"

		" COMPANY: 0x%02x and VERSTEP: 0x%02x\n",

		i2c_adapter_id(client->adapter), client->addr,

		company, verstep);



	/* If auto-detecting, Determine the chip type. */

	if (kind <= 0) {

		dev_dbg(&client->dev, "Autodetecting device at %d,0x%02x "

		dev_dbg(&adapter->dev, "Autodetecting device at %d,0x%02x "

			"...\n", i2c_adapter_id(adapter), address);

		if (company == ADM1026_COMPANY_ANALOG_DEV

		    && verstep == ADM1026_VERSTEP_ADM1026) {
@@ -1704,7 +1690,7 @@ static int adm1026_detect(struct i2c_adapter *adapter, int address, 
				verstep);

			kind = any_chip;

		} else {

			dev_dbg(&client->dev, ": Autodetection "

			dev_dbg(&adapter->dev, ": Autodetection "

				"failed\n");

			/* Not an ADM1026 ... */

			if (kind == 0) { /* User used force=x,y */
@@ -1713,32 +1699,28 @@ static int adm1026_detect(struct i2c_adapter *adapter, int address, 
					"force_adm1026.\n",

					i2c_adapter_id(adapter), address);

			}

			goto exitfree;

			return -ENODEV;

		}

	}

	strlcpy(info->type, "adm1026", I2C_NAME_SIZE);



	/* Fill in the chip specific driver values */

	switch (kind) {

	case any_chip :

		type_name = "adm1026";

		break;

	case adm1026 :

		type_name = "adm1026";

		break;

	default :

		dev_err(&adapter->dev, ": Internal error, invalid "

			"kind (%d)!\n", kind);

		err = -EFAULT;

		goto exitfree;

	return 0;

}

	strlcpy(client->name, type_name, I2C_NAME_SIZE);



	/* Fill in the remaining client fields */

	mutex_init(&data->update_lock);

static int adm1026_probe(struct i2c_client *client,

			 const struct i2c_device_id *id)

{

	struct adm1026_data *data;

	int err;



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

	if ((err = i2c_attach_client(client)))

		goto exitfree;

	data = kzalloc(sizeof(struct adm1026_data), GFP_KERNEL);

	if (!data) {

		err = -ENOMEM;

		goto exit;

	}



	i2c_set_clientdata(client, data);

	mutex_init(&data->update_lock);



	/* Set the VRM version */

	data->vrm = vid_which_vrm();
@@ -1748,7 +1730,7 @@ static int adm1026_detect(struct i2c_adapter *adapter, int address, 


	/* Register sysfs hooks */

	if ((err = sysfs_create_group(&client->dev.kobj, &adm1026_group)))

		goto exitdetach;

		goto exitfree;

	if (data->config1 & CFG1_AIN8_9)

		err = sysfs_create_group(&client->dev.kobj,

					 &adm1026_group_in8_9);
@@ -1773,15 +1755,13 @@ exitremove: 
		sysfs_remove_group(&client->dev.kobj, &adm1026_group_in8_9);

	else

		sysfs_remove_group(&client->dev.kobj, &adm1026_group_temp3);

exitdetach:

	i2c_detach_client(client);

exitfree:

	kfree(data);

exit:

	return err;

}



static int adm1026_detach_client(struct i2c_client *client)

static int adm1026_remove(struct i2c_client *client)

{

	struct adm1026_data *data = i2c_get_clientdata(client);

	hwmon_device_unregister(data->hwmon_dev);
@@ -1790,7 +1770,6 @@ static int adm1026_detach_client(struct i2c_client *client) 
		sysfs_remove_group(&client->dev.kobj, &adm1026_group_in8_9);

	else

		sysfs_remove_group(&client->dev.kobj, &adm1026_group_temp3);

	i2c_detach_client(client);

	kfree(data);

	return 0;

}