[net-next-2.6.git] / drivers / hwmon / ad7418.c

/*
 * An hwmon driver for the Analog Devices AD7416/17/18
 * Copyright (C) 2006-07 Tower Technologies
 *
 * Author: Alessandro Zummo <a.zummo@towertech.it>
 *
 * Based on lm75.c
 * Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License,
 * as published by the Free Software Foundation - version 2.
 */

#include <linux/module.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/delay.h>

#include "lm75.h"

#define DRV_VERSION "0.3"

/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x28, I2C_CLIENT_END };
/* Insmod parameters */
I2C_CLIENT_INSMOD_3(ad7416, ad7417, ad7418);

/* AD7418 registers */
#define AD7418_REG_TEMP_IN	0x00
#define AD7418_REG_CONF		0x01
#define AD7418_REG_TEMP_HYST	0x02
#define AD7418_REG_TEMP_OS	0x03
#define AD7418_REG_ADC		0x04
#define AD7418_REG_CONF2	0x05

#define AD7418_REG_ADC_CH(x)	((x) << 5)
#define AD7418_CH_TEMP		AD7418_REG_ADC_CH(0)

static const u8 AD7418_REG_TEMP[] = { AD7418_REG_TEMP_IN,
					AD7418_REG_TEMP_HYST,
					AD7418_REG_TEMP_OS };

struct ad7418_data {
	struct i2c_client	client;
	struct device		*hwmon_dev;
	struct attribute_group	attrs;
	enum chips		type;
	struct mutex		lock;
	int			adc_max;	/* number of ADC channels */
	char			valid;
	unsigned long		last_updated;	/* In jiffies */
	s16			temp[3];	/* Register values */
	u16			in[4];
};

static int ad7418_attach_adapter(struct i2c_adapter *adapter);
static int ad7418_detect(struct i2c_adapter *adapter, int address, int kind);
static int ad7418_detach_client(struct i2c_client *client);

static struct i2c_driver ad7418_driver = {
	.driver = {
		.name	= "ad7418",
	},
	.attach_adapter	= ad7418_attach_adapter,
	.detach_client	= ad7418_detach_client,
};

/* All registers are word-sized, except for the configuration registers.
 * AD7418 uses a high-byte first convention. Do NOT use those functions to
 * access the configuration registers CONF and CONF2, as they are byte-sized.
 */
static inline int ad7418_read(struct i2c_client *client, u8 reg)
{
	return swab16(i2c_smbus_read_word_data(client, reg));
}

static inline int ad7418_write(struct i2c_client *client, u8 reg, u16 value)
{
	return i2c_smbus_write_word_data(client, reg, swab16(value));
}

static void ad7418_init_client(struct i2c_client *client)
{
	struct ad7418_data *data = i2c_get_clientdata(client);

	int reg = i2c_smbus_read_byte_data(client, AD7418_REG_CONF);
	if (reg < 0) {
		dev_err(&client->dev, "cannot read configuration register\n");
	} else {
		dev_info(&client->dev, "configuring for mode 1\n");
		i2c_smbus_write_byte_data(client, AD7418_REG_CONF, reg & 0xfe);

		if (data->type == ad7417 || data->type == ad7418)
			i2c_smbus_write_byte_data(client,
						AD7418_REG_CONF2, 0x00);
	}
}

static struct ad7418_data *ad7418_update_device(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct ad7418_data *data = i2c_get_clientdata(client);

	mutex_lock(&data->lock);

	if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
		|| !data->valid) {
		u8 cfg;
		int i, ch;

		/* read config register and clear channel bits */
		cfg = i2c_smbus_read_byte_data(client, AD7418_REG_CONF);
		cfg &= 0x1F;

		i2c_smbus_write_byte_data(client, AD7418_REG_CONF,
						cfg | AD7418_CH_TEMP);
		udelay(30);

		for (i = 0; i < 3; i++) {
			data->temp[i] = ad7418_read(client, AD7418_REG_TEMP[i]);
		}

		for (i = 0, ch = 4; i < data->adc_max; i++, ch--) {
			i2c_smbus_write_byte_data(client,
					AD7418_REG_CONF,
					cfg | AD7418_REG_ADC_CH(ch));

			udelay(15);
			data->in[data->adc_max - 1 - i] =
				ad7418_read(client, AD7418_REG_ADC);
		}

		/* restore old configuration value */
		ad7418_write(client, AD7418_REG_CONF, cfg);

		data->last_updated = jiffies;
		data->valid = 1;
	}

	mutex_unlock(&data->lock);

	return data;
}

static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
			char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct ad7418_data *data = ad7418_update_device(dev);
	return sprintf(buf, "%d\n",
		LM75_TEMP_FROM_REG(data->temp[attr->index]));
}

static ssize_t show_adc(struct device *dev, struct device_attribute *devattr,
			char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct ad7418_data *data = ad7418_update_device(dev);

	return sprintf(buf, "%d\n",
		((data->in[attr->index] >> 6) * 2500 + 512) / 1024);
}

static ssize_t set_temp(struct device *dev, struct device_attribute *devattr,
			const char *buf, size_t count)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct i2c_client *client = to_i2c_client(dev);
	struct ad7418_data *data = i2c_get_clientdata(client);
	long temp = simple_strtol(buf, NULL, 10);

	mutex_lock(&data->lock);
	data->temp[attr->index] = LM75_TEMP_TO_REG(temp);
	ad7418_write(client, AD7418_REG_TEMP[attr->index], data->temp[attr->index]);
	mutex_unlock(&data->lock);
	return count;
}

static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
				show_temp, set_temp, 1);
static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
				show_temp, set_temp, 2);

static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_adc, NULL, 0);
static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_adc, NULL, 1);
static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_adc, NULL, 2);
static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_adc, NULL, 3);

static int ad7418_attach_adapter(struct i2c_adapter *adapter)
{
	if (!(adapter->class & I2C_CLASS_HWMON))
		return 0;
	return i2c_probe(adapter, &addr_data, ad7418_detect);
}

static struct attribute *ad7416_attributes[] = {
	&sensor_dev_attr_temp1_max.dev_attr.attr,
	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	NULL
};

static struct attribute *ad7417_attributes[] = {
	&sensor_dev_attr_temp1_max.dev_attr.attr,
	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	&sensor_dev_attr_in1_input.dev_attr.attr,
	&sensor_dev_attr_in2_input.dev_attr.attr,
	&sensor_dev_attr_in3_input.dev_attr.attr,
	&sensor_dev_attr_in4_input.dev_attr.attr,
	NULL
};

static struct attribute *ad7418_attributes[] = {
	&sensor_dev_attr_temp1_max.dev_attr.attr,
	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	&sensor_dev_attr_in1_input.dev_attr.attr,
	NULL
};

static int ad7418_detect(struct i2c_adapter *adapter, int address, int kind)
{
	struct i2c_client *client;
	struct ad7418_data *data;
	int err = 0;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
					I2C_FUNC_SMBUS_WORD_DATA))
		goto exit;

	if (!(data = kzalloc(sizeof(struct ad7418_data), GFP_KERNEL))) {
		err = -ENOMEM;
		goto exit;
	}

	client = &data->client;
	client->addr = address;
	client->adapter = adapter;
	client->driver = &ad7418_driver;

	i2c_set_clientdata(client, data);

	mutex_init(&data->lock);

	/* AD7418 has a curious behaviour on registers 6 and 7. They
	 * both always read 0xC071 and are not documented on the datasheet.
	 * We use them to detect the chip.
	 */
	if (kind <= 0) {
		int reg, reg6, reg7;

		/* the AD7416 lies within this address range, but I have
		 * no means to check.
		 */
		if (address >= 0x48 && address <= 0x4f) {
			/* XXX add tests for AD7416 here */
			/* data->type = ad7416; */
		}
		/* here we might have AD7417 or AD7418 */
		else if (address >= 0x28 && address <= 0x2f) {
			reg6 = i2c_smbus_read_word_data(client, 0x06);
			reg7 = i2c_smbus_read_word_data(client, 0x07);

			if (address == 0x28 && reg6 == 0xC071 && reg7 == 0xC071)
				data->type = ad7418;

			/* XXX add tests for AD7417 here */


			/* both AD7417 and AD7418 have bits 0-5 of
			 * the CONF2 register at 0
			 */
			reg = i2c_smbus_read_byte_data(client,
							AD7418_REG_CONF2);
			if (reg & 0x3F)
				data->type = any_chip; /* detection failed */
		}
	} else {
		dev_dbg(&adapter->dev, "detection forced\n");
	}

	if (kind > 0)
		data->type = kind;
	else if (kind < 0 && data->type == any_chip) {
		err = -ENODEV;
		goto exit_free;
	}

	switch (data->type) {
	case any_chip:
	case ad7416:
		data->adc_max = 0;
		data->attrs.attrs = ad7416_attributes;
		strlcpy(client->name, "ad7416", I2C_NAME_SIZE);
		break;

	case ad7417:
		data->adc_max = 4;
		data->attrs.attrs = ad7417_attributes;
		strlcpy(client->name, "ad7417", I2C_NAME_SIZE);
		break;

	case ad7418:
		data->adc_max = 1;
		data->attrs.attrs = ad7418_attributes;
		strlcpy(client->name, "ad7418", I2C_NAME_SIZE);
		break;
	}

	if ((err = i2c_attach_client(client)))
		goto exit_free;

	dev_info(&client->dev, "%s chip found\n", client->name);

	/* Initialize the AD7418 chip */
	ad7418_init_client(client);

	/* Register sysfs hooks */
	if ((err = sysfs_create_group(&client->dev.kobj, &data->attrs)))
		goto exit_detach;

	data->hwmon_dev = hwmon_device_register(&client->dev);
	if (IS_ERR(data->hwmon_dev)) {
		err = PTR_ERR(data->hwmon_dev);
		goto exit_remove;
	}

	return 0;

exit_remove:
	sysfs_remove_group(&client->dev.kobj, &data->attrs);
exit_detach:
	i2c_detach_client(client);
exit_free:
	kfree(data);
exit:
	return err;
}

static int ad7418_detach_client(struct i2c_client *client)
{
	struct ad7418_data *data = i2c_get_clientdata(client);
	hwmon_device_unregister(data->hwmon_dev);
	sysfs_remove_group(&client->dev.kobj, &data->attrs);
	i2c_detach_client(client);
	kfree(data);
	return 0;
}

static int __init ad7418_init(void)
{
	return i2c_add_driver(&ad7418_driver);
}

static void __exit ad7418_exit(void)
{
	i2c_del_driver(&ad7418_driver);
}

MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
MODULE_DESCRIPTION("AD7416/17/18 driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);

module_init(ad7418_init);
module_exit(ad7418_exit);
Commit	Line	Data
2d8dd65f AZ	1	/*
	2	* An hwmon driver for the Analog Devices AD7416/17/18
	3	* Copyright (C) 2006-07 Tower Technologies
	4	*
	5	* Author: Alessandro Zummo <a.zummo@towertech.it>
	6	*
	7	* Based on lm75.c
	8	* Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl>
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License,
	12	* as published by the Free Software Foundation - version 2.
	13	*/
	14
	15	#include <linux/module.h>
	16	#include <linux/jiffies.h>
	17	#include <linux/i2c.h>
	18	#include <linux/hwmon.h>
	19	#include <linux/hwmon-sysfs.h>
	20	#include <linux/err.h>
	21	#include <linux/mutex.h>
	22	#include <linux/delay.h>
	23
	24	#include "lm75.h"
	25
	26	#define DRV_VERSION "0.3"
	27
	28	/* Addresses to scan */
25e9c86d	29	static const unsigned short normal_i2c[] = { 0x28, I2C_CLIENT_END };
2d8dd65f AZ	30	/* Insmod parameters */
	31	I2C_CLIENT_INSMOD_3(ad7416, ad7417, ad7418);
	32
	33	/* AD7418 registers */
	34	#define AD7418_REG_TEMP_IN 0x00
	35	#define AD7418_REG_CONF 0x01
	36	#define AD7418_REG_TEMP_HYST 0x02
	37	#define AD7418_REG_TEMP_OS 0x03
	38	#define AD7418_REG_ADC 0x04
	39	#define AD7418_REG_CONF2 0x05
	40
	41	#define AD7418_REG_ADC_CH(x) ((x) << 5)
	42	#define AD7418_CH_TEMP AD7418_REG_ADC_CH(0)
	43
	44	static const u8 AD7418_REG_TEMP[] = { AD7418_REG_TEMP_IN,
	45	AD7418_REG_TEMP_HYST,
	46	AD7418_REG_TEMP_OS };
	47
	48	struct ad7418_data {
	49	struct i2c_client client;
1beeffe4	50	struct device *hwmon_dev;
2d8dd65f AZ	51	struct attribute_group attrs;
	52	enum chips type;
	53	struct mutex lock;
	54	int adc_max; /* number of ADC channels */
	55	char valid;
	56	unsigned long last_updated; /* In jiffies */
	57	s16 temp[3]; /* Register values */
	58	u16 in[4];
	59	};
	60
	61	static int ad7418_attach_adapter(struct i2c_adapter *adapter);
	62	static int ad7418_detect(struct i2c_adapter *adapter, int address, int kind);
	63	static int ad7418_detach_client(struct i2c_client *client);
	64
	65	static struct i2c_driver ad7418_driver = {
	66	.driver = {
	67	.name = "ad7418",
	68	},
	69	.attach_adapter = ad7418_attach_adapter,
	70	.detach_client = ad7418_detach_client,
	71	};
	72
	73	/* All registers are word-sized, except for the configuration registers.
	74	* AD7418 uses a high-byte first convention. Do NOT use those functions to
	75	* access the configuration registers CONF and CONF2, as they are byte-sized.
	76	*/
	77	static inline int ad7418_read(struct i2c_client *client, u8 reg)
	78	{
	79	return swab16(i2c_smbus_read_word_data(client, reg));
	80	}
	81
	82	static inline int ad7418_write(struct i2c_client *client, u8 reg, u16 value)
	83	{
	84	return i2c_smbus_write_word_data(client, reg, swab16(value));
	85	}
	86
	87	static void ad7418_init_client(struct i2c_client *client)
	88	{
	89	struct ad7418_data *data = i2c_get_clientdata(client);
	90
	91	int reg = i2c_smbus_read_byte_data(client, AD7418_REG_CONF);
	92	if (reg < 0) {
	93	dev_err(&client->dev, "cannot read configuration register\n");
	94	} else {
	95	dev_info(&client->dev, "configuring for mode 1\n");
	96	i2c_smbus_write_byte_data(client, AD7418_REG_CONF, reg & 0xfe);
	97
	98	if (data->type == ad7417 \|\| data->type == ad7418)
	99	i2c_smbus_write_byte_data(client,
	100	AD7418_REG_CONF2, 0x00);
	101	}
	102	}
	103
	104	static struct ad7418_data ad7418_update_device(struct device dev)
	105	{
	106	struct i2c_client *client = to_i2c_client(dev);
	107	struct ad7418_data *data = i2c_get_clientdata(client);
	108
	109	mutex_lock(&data->lock);
	110
	111	if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
	112	\|\| !data->valid) {
	113	u8 cfg;
	114	int i, ch;
115
116	/* read config register and clear channel bits */
117	cfg = i2c_smbus_read_byte_data(client, AD7418_REG_CONF);
118	cfg &= 0x1F;
119
120	i2c_smbus_write_byte_data(client, AD7418_REG_CONF,
121	cfg \| AD7418_CH_TEMP);
122	udelay(30);
123
124	for (i = 0; i < 3; i++) {
125	data->temp[i] = ad7418_read(client, AD7418_REG_TEMP[i]);
126	}
127
128	for (i = 0, ch = 4; i < data->adc_max; i++, ch--) {
129	i2c_smbus_write_byte_data(client,
130	AD7418_REG_CONF,
131	cfg \| AD7418_REG_ADC_CH(ch));
132
133	udelay(15);
134	data->in[data->adc_max - 1 - i] =
135	ad7418_read(client, AD7418_REG_ADC);
136	}
137
138	/* restore old configuration value */
139	ad7418_write(client, AD7418_REG_CONF, cfg);
140
141	data->last_updated = jiffies;
142	data->valid = 1;
143	}
144
145	mutex_unlock(&data->lock);
146
147	return data;
148	}
149
150	static ssize_t show_temp(struct device dev, struct device_attribute devattr,
151	char *buf)
152	{
153	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
154	struct ad7418_data *data = ad7418_update_device(dev);
155	return sprintf(buf, "%d\n",
156	LM75_TEMP_FROM_REG(data->temp[attr->index]));
157	}
158
159	static ssize_t show_adc(struct device dev, struct device_attribute devattr,
160	char *buf)
161	{
162	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
163	struct ad7418_data *data = ad7418_update_device(dev);
164
165	return sprintf(buf, "%d\n",
166	((data->in[attr->index] >> 6) * 2500 + 512) / 1024);
167	}
168
169	static ssize_t set_temp(struct device dev, struct device_attribute devattr,
170	const char *buf, size_t count)
171	{
172	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
173	struct i2c_client *client = to_i2c_client(dev);
174	struct ad7418_data *data = i2c_get_clientdata(client);
5bfedac0	175	long temp = simple_strtol(buf, NULL, 10);
2d8dd65f AZ	176
	177	mutex_lock(&data->lock);
	178	data->temp[attr->index] = LM75_TEMP_TO_REG(temp);
	179	ad7418_write(client, AD7418_REG_TEMP[attr->index], data->temp[attr->index]);
	180	mutex_unlock(&data->lock);
	181	return count;
	182	}
	183
	184	static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
	185	static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR \| S_IRUGO,
	186	show_temp, set_temp, 1);
	187	static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR \| S_IRUGO,
	188	show_temp, set_temp, 2);
	189
	190	static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_adc, NULL, 0);
	191	static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_adc, NULL, 1);
	192	static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_adc, NULL, 2);
	193	static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_adc, NULL, 3);
	194
	195	static int ad7418_attach_adapter(struct i2c_adapter *adapter)
	196	{
	197	if (!(adapter->class & I2C_CLASS_HWMON))
	198	return 0;
	199	return i2c_probe(adapter, &addr_data, ad7418_detect);
	200	}
	201
	202	static struct attribute *ad7416_attributes[] = {
	203	&sensor_dev_attr_temp1_max.dev_attr.attr,
	204	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
	205	&sensor_dev_attr_temp1_input.dev_attr.attr,
	206	NULL
	207	};
	208
	209	static struct attribute *ad7417_attributes[] = {
	210	&sensor_dev_attr_temp1_max.dev_attr.attr,
	211	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
	212	&sensor_dev_attr_temp1_input.dev_attr.attr,
	213	&sensor_dev_attr_in1_input.dev_attr.attr,
	214	&sensor_dev_attr_in2_input.dev_attr.attr,
	215	&sensor_dev_attr_in3_input.dev_attr.attr,
	216	&sensor_dev_attr_in4_input.dev_attr.attr,
	217	NULL
	218	};
	219
	220	static struct attribute *ad7418_attributes[] = {
	221	&sensor_dev_attr_temp1_max.dev_attr.attr,
	222	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
	223	&sensor_dev_attr_temp1_input.dev_attr.attr,
	224	&sensor_dev_attr_in1_input.dev_attr.attr,
	225	NULL
	226	};
	227
	228	static int ad7418_detect(struct i2c_adapter *adapter, int address, int kind)
	229	{
	230	struct i2c_client *client;
	231	struct ad7418_data *data;
	232	int err = 0;
	233
	234	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA \|
	235	I2C_FUNC_SMBUS_WORD_DATA))
	236	goto exit;
	237
	238	if (!(data = kzalloc(sizeof(struct ad7418_data), GFP_KERNEL))) {
	239	err = -ENOMEM;
240	goto exit;
241	}
242
243	client = &data->client;
244	client->addr = address;
245	client->adapter = adapter;
246	client->driver = &ad7418_driver;
247
248	i2c_set_clientdata(client, data);
249
250	mutex_init(&data->lock);
251
252	/* AD7418 has a curious behaviour on registers 6 and 7. They
253	* both always read 0xC071 and are not documented on the datasheet.
254	* We use them to detect the chip.
255	*/
256	if (kind <= 0) {
257	int reg, reg6, reg7;
258
259	/* the AD7416 lies within this address range, but I have
260	* no means to check.
261	*/
262	if (address >= 0x48 && address <= 0x4f) {
263	/* XXX add tests for AD7416 here */
264	/* data->type = ad7416; */
265	}
266	/* here we might have AD7417 or AD7418 */
267	else if (address >= 0x28 && address <= 0x2f) {
268	reg6 = i2c_smbus_read_word_data(client, 0x06);
269	reg7 = i2c_smbus_read_word_data(client, 0x07);
270
271	if (address == 0x28 && reg6 == 0xC071 && reg7 == 0xC071)
272	data->type = ad7418;
273
274	/* XXX add tests for AD7417 here */
275
276
277	/* both AD7417 and AD7418 have bits 0-5 of
278	* the CONF2 register at 0
279	*/
280	reg = i2c_smbus_read_byte_data(client,
281	AD7418_REG_CONF2);
282	if (reg & 0x3F)
283	data->type = any_chip; /* detection failed */
284	}
285	} else {
286	dev_dbg(&adapter->dev, "detection forced\n");
287	}
288
289	if (kind > 0)
290	data->type = kind;
291	else if (kind < 0 && data->type == any_chip) {
292	err = -ENODEV;
293	goto exit_free;
294	}
295
296	switch (data->type) {
297	case any_chip:
298	case ad7416:
299	data->adc_max = 0;
300	data->attrs.attrs = ad7416_attributes;
301	strlcpy(client->name, "ad7416", I2C_NAME_SIZE);
302	break;
303
304	case ad7417:
305	data->adc_max = 4;
306	data->attrs.attrs = ad7417_attributes;
307	strlcpy(client->name, "ad7417", I2C_NAME_SIZE);
308	break;
309
310	case ad7418:
311	data->adc_max = 1;
312	data->attrs.attrs = ad7418_attributes;
313	strlcpy(client->name, "ad7418", I2C_NAME_SIZE);
314	break;
315	}
316
317	if ((err = i2c_attach_client(client)))
318	goto exit_free;
319
320	dev_info(&client->dev, "%s chip found\n", client->name);
321
322	/* Initialize the AD7418 chip */
323	ad7418_init_client(client);
324
325	/* Register sysfs hooks */
326	if ((err = sysfs_create_group(&client->dev.kobj, &data->attrs)))
327	goto exit_detach;
328
1beeffe4 TJ	329	data->hwmon_dev = hwmon_device_register(&client->dev);
	330	if (IS_ERR(data->hwmon_dev)) {
	331	err = PTR_ERR(data->hwmon_dev);
2d8dd65f AZ	332	goto exit_remove;
	333	}
	334
	335	return 0;
	336
	337	exit_remove:
	338	sysfs_remove_group(&client->dev.kobj, &data->attrs);
	339	exit_detach:
	340	i2c_detach_client(client);
	341	exit_free:
	342	kfree(data);
	343	exit:
	344	return err;
	345	}
	346
	347	static int ad7418_detach_client(struct i2c_client *client)
	348	{
	349	struct ad7418_data *data = i2c_get_clientdata(client);
1beeffe4	350	hwmon_device_unregister(data->hwmon_dev);
2d8dd65f AZ	351	sysfs_remove_group(&client->dev.kobj, &data->attrs);
	352	i2c_detach_client(client);
	353	kfree(data);
	354	return 0;
	355	}
	356
	357	static int __init ad7418_init(void)
	358	{
	359	return i2c_add_driver(&ad7418_driver);
	360	}
	361
	362	static void __exit ad7418_exit(void)
	363	{
	364	i2c_del_driver(&ad7418_driver);
	365	}
	366
	367	MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
	368	MODULE_DESCRIPTION("AD7416/17/18 driver");
	369	MODULE_LICENSE("GPL");
	370	MODULE_VERSION(DRV_VERSION);
	371
	372	module_init(ad7418_init);
	373	module_exit(ad7418_exit);