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Commit 7dbafe02 authored by Jean Delvare's avatar Jean Delvare Committed by Jean Delvare
Browse files

hwmon: (adm1025) Convert to a new-style i2c driver 



The new-style adm1025 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 65817ed8

drivers/hwmon/adm1025.c

+49 −52
Original line number Diff line number Diff line
@@ -2,7 +2,7 @@ 
 * adm1025.c

 *

 * Copyright (C) 2000       Chen-Yuan Wu <gwu@esoft.com>

 * Copyright (C) 2003-2004  Jean Delvare <khali@linux-fr.org>

 * Copyright (C) 2003-2008  Jean Delvare <khali@linux-fr.org>

 *

 * The ADM1025 is a sensor chip made by Analog Devices. It reports up to 6

 * voltages (including its own power source) and up to two temperatures
@@ -109,22 +109,35 @@ static const int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 }; 
 * Functions declaration

 */



static int adm1025_attach_adapter(struct i2c_adapter *adapter);

static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind);

static int adm1025_probe(struct i2c_client *client,

			 const struct i2c_device_id *id);

static int adm1025_detect(struct i2c_client *client, int kind,

			  struct i2c_board_info *info);

static void adm1025_init_client(struct i2c_client *client);

static int adm1025_detach_client(struct i2c_client *client);

static int adm1025_remove(struct i2c_client *client);

static struct adm1025_data *adm1025_update_device(struct device *dev);



/*

 * Driver data (common to all clients)

 */



static const struct i2c_device_id adm1025_id[] = {

	{ "adm1025", adm1025 },

	{ "ne1619", ne1619 },

	{ }

};

MODULE_DEVICE_TABLE(i2c, adm1025_id);



static struct i2c_driver adm1025_driver = {

	.class		= I2C_CLASS_HWMON,

	.driver = {

		.name	= "adm1025",

	},

	.attach_adapter	= adm1025_attach_adapter,

	.detach_client	= adm1025_detach_client,

	.probe		= adm1025_probe,

	.remove		= adm1025_remove,

	.id_table	= adm1025_id,

	.detect		= adm1025_detect,

	.address_data	= &addr_data,

};



/*
@@ -132,7 +145,6 @@ static struct i2c_driver adm1025_driver = { 
 */



struct adm1025_data {

	struct i2c_client client;

	struct device *hwmon_dev;

	struct mutex update_lock;

	char valid; /* zero until following fields are valid */
@@ -344,13 +356,6 @@ static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); 
 * Real code

 */



static int adm1025_attach_adapter(struct i2c_adapter *adapter)

{

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

		return 0;

	return i2c_probe(adapter, &addr_data, adm1025_detect);

}



static struct attribute *adm1025_attributes[] = {

	&sensor_dev_attr_in0_input.dev_attr.attr,

	&sensor_dev_attr_in1_input.dev_attr.attr,
@@ -403,31 +408,16 @@ static const struct attribute_group adm1025_group_in4 = { 
	.attrs = adm1025_attributes_in4,

};



/*

 * The following function does more than just detection. If detection

 * succeeds, it also registers the new chip.

 */

static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind)

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

static int adm1025_detect(struct i2c_client *client, int kind,

			  struct i2c_board_info *info)

{

	struct i2c_client *client;

	struct adm1025_data *data;

	int err = 0;

	struct i2c_adapter *adapter = client->adapter;

	const char *name = "";

	u8 config;



	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))

		goto exit;



	if (!(data = kzalloc(sizeof(struct adm1025_data), GFP_KERNEL))) {

		err = -ENOMEM;

		goto exit;

	}



	client = &data->client;

	i2c_set_clientdata(client, data);

	client->addr = address;

	client->adapter = adapter;

	client->driver = &adm1025_driver;

		return -ENODEV;



	/*

	 * Now we do the remaining detection. A negative kind means that
@@ -448,8 +438,8 @@ static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind) 
		     ADM1025_REG_STATUS2) & 0xBC) != 0x00) {

			dev_dbg(&adapter->dev,

				"ADM1025 detection failed at 0x%02x.\n",

				address);

			goto exit_free;

				client->addr);

			return -ENODEV;

		}

	}
@@ -465,7 +455,7 @@ static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind) 
			}

		} else

		if (man_id == 0xA1) { /* Philips */

			if (address != 0x2E

			if (client->addr != 0x2E

			 && (chip_id & 0xF0) == 0x20) { /* NE1619 */

				kind = ne1619;

			}
@@ -475,7 +465,7 @@ static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind) 
			dev_info(&adapter->dev,

			    "Unsupported chip (man_id=0x%02X, "

			    "chip_id=0x%02X).\n", man_id, chip_id);

			goto exit_free;

			return -ENODEV;

		}

	}
@@ -484,23 +474,36 @@ static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind) 
	} else if (kind == ne1619) {

		name = "ne1619";

	}

	strlcpy(info->type, name, I2C_NAME_SIZE);



	/* We can fill in the remaining client fields */

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

	mutex_init(&data->update_lock);

	return 0;

}



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

	if ((err = i2c_attach_client(client)))

		goto exit_free;

static int adm1025_probe(struct i2c_client *client,

			 const struct i2c_device_id *id)

{

	struct adm1025_data *data;

	int err;

	u8 config;



	data = kzalloc(sizeof(struct adm1025_data), GFP_KERNEL);

	if (!data) {

		err = -ENOMEM;

		goto exit;

	}



	i2c_set_clientdata(client, data);

	mutex_init(&data->update_lock);



	/* Initialize the ADM1025 chip */

	adm1025_init_client(client);



	/* Register sysfs hooks */

	if ((err = sysfs_create_group(&client->dev.kobj, &adm1025_group)))

		goto exit_detach;

		goto exit_free;



	/* Pin 11 is either in4 (+12V) or VID4 */

	config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);

	if (!(config & 0x20)) {

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

					      &adm1025_group_in4)))
@@ -518,8 +521,6 @@ static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind) 
exit_remove:

	sysfs_remove_group(&client->dev.kobj, &adm1025_group);

	sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4);

exit_detach:

	i2c_detach_client(client);

exit_free:

	kfree(data);

exit:
@@ -568,18 +569,14 @@ static void adm1025_init_client(struct i2c_client *client) 
					  (reg&0x7E)|0x01);

}



static int adm1025_detach_client(struct i2c_client *client)

static int adm1025_remove(struct i2c_client *client)

{

	struct adm1025_data *data = i2c_get_clientdata(client);

	int err;



	hwmon_device_unregister(data->hwmon_dev);

	sysfs_remove_group(&client->dev.kobj, &adm1025_group);

	sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4);



	if ((err = i2c_detach_client(client)))

		return err;



	kfree(data);

	return 0;

}