[mirror_ubuntu-artful-kernel.git] / drivers / hwmon / tmp401.c

/* tmp401.c
 *
 * Copyright (C) 2007,2008 Hans de Goede <hdegoede@redhat.com>
 * Preliminary tmp411 support by:
 * Gabriel Konat, Sander Leget, Wouter Willems
 * Copyright (C) 2009 Andre Prendel <andre.prendel@gmx.de>
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/*
 * Driver for the Texas Instruments TMP401 SMBUS temperature sensor IC.
 *
 * Note this IC is in some aspect similar to the LM90, but it has quite a
 * few differences too, for example the local temp has a higher resolution
 * and thus has 16 bits registers for its value and limit instead of 8 bits.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <linux/slab.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/sysfs.h>

/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x4c, 0x4d, 0x4e, I2C_CLIENT_END };

enum chips { tmp401, tmp411, tmp431 };

/*
 * The TMP401 registers, note some registers have different addresses for
 * reading and writing
 */
#define TMP401_STATUS				0x02
#define TMP401_CONFIG_READ			0x03
#define TMP401_CONFIG_WRITE			0x09
#define TMP401_CONVERSION_RATE_READ		0x04
#define TMP401_CONVERSION_RATE_WRITE		0x0A
#define TMP401_TEMP_CRIT_HYST			0x21
#define TMP401_MANUFACTURER_ID_REG		0xFE
#define TMP401_DEVICE_ID_REG			0xFF

static const u8 TMP401_TEMP_MSB_READ[6][2] = {
	{ 0x00, 0x01 },	/* temp */
	{ 0x06, 0x08 },	/* low limit */
	{ 0x05, 0x07 },	/* high limit */
	{ 0x20, 0x19 },	/* therm (crit) limit */
	{ 0x30, 0x34 },	/* lowest */
	{ 0x32, 0x36 },	/* highest */
};

static const u8 TMP401_TEMP_MSB_WRITE[6][2] = {
	{ 0, 0 },	/* temp (unused) */
	{ 0x0C, 0x0E },	/* low limit */
	{ 0x0B, 0x0D },	/* high limit */
	{ 0x20, 0x19 },	/* therm (crit) limit */
	{ 0x30, 0x34 },	/* lowest */
	{ 0x32, 0x36 },	/* highest */
};

static const u8 TMP401_TEMP_LSB[6][2] = {
	{ 0x15, 0x10 },	/* temp */
	{ 0x17, 0x14 },	/* low limit */
	{ 0x16, 0x13 },	/* high limit */
	{ 0, 0 },	/* therm (crit) limit (unused) */
	{ 0x31, 0x35 },	/* lowest */
	{ 0x33, 0x37 },	/* highest */
};

/* Flags */
#define TMP401_CONFIG_RANGE			BIT(2)
#define TMP401_CONFIG_SHUTDOWN			BIT(6)
#define TMP401_STATUS_LOCAL_CRIT		BIT(0)
#define TMP401_STATUS_REMOTE_CRIT		BIT(1)
#define TMP401_STATUS_REMOTE_OPEN		BIT(2)
#define TMP401_STATUS_REMOTE_LOW		BIT(3)
#define TMP401_STATUS_REMOTE_HIGH		BIT(4)
#define TMP401_STATUS_LOCAL_LOW			BIT(5)
#define TMP401_STATUS_LOCAL_HIGH		BIT(6)

/* Manufacturer / Device ID's */
#define TMP401_MANUFACTURER_ID			0x55
#define TMP401_DEVICE_ID			0x11
#define TMP411A_DEVICE_ID			0x12
#define TMP411B_DEVICE_ID			0x13
#define TMP411C_DEVICE_ID			0x10
#define TMP431_DEVICE_ID			0x31

/*
 * Driver data (common to all clients)
 */

static const struct i2c_device_id tmp401_id[] = {
	{ "tmp401", tmp401 },
	{ "tmp411", tmp411 },
	{ "tmp431", tmp431 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, tmp401_id);

/*
 * Client data (each client gets its own)
 */

struct tmp401_data {
	struct device *hwmon_dev;
	struct mutex update_lock;
	char valid; /* zero until following fields are valid */
	unsigned long last_updated; /* in jiffies */
	enum chips kind;

	/* register values */
	u8 status;
	u8 config;
	u16 temp[6][2];
	u8 temp_crit_hyst;
};

/*
 * Sysfs attr show / store functions
 */

static int tmp401_register_to_temp(u16 reg, u8 config)
{
	int temp = reg;

	if (config & TMP401_CONFIG_RANGE)
		temp -= 64 * 256;

	return DIV_ROUND_CLOSEST(temp * 125, 32);
}

static u16 tmp401_temp_to_register(long temp, u8 config, int zbits)
{
	if (config & TMP401_CONFIG_RANGE) {
		temp = clamp_val(temp, -64000, 191000);
		temp += 64000;
	} else
		temp = clamp_val(temp, 0, 127000);

	return DIV_ROUND_CLOSEST(temp * (1 << (8 - zbits)), 1000) << zbits;
}

static int tmp401_update_device_reg16(struct i2c_client *client,
				      struct tmp401_data *data)
{
	int i, j, val;
	int num_regs = data->kind == tmp411 ? 6 : 4;

	for (i = 0; i < 2; i++) {			/* local / rem1 */
		for (j = 0; j < num_regs; j++) {	/* temp / low / ... */
			/*
			 * High byte must be read first immediately followed
			 * by the low byte
			 */
			val = i2c_smbus_read_byte_data(client,
						TMP401_TEMP_MSB_READ[j][i]);
			if (val < 0)
				return val;
			data->temp[j][i] = val << 8;
			if (j == 3)		/* crit is msb only */
				continue;
			val = i2c_smbus_read_byte_data(client,
						TMP401_TEMP_LSB[j][i]);
			if (val < 0)
				return val;
			data->temp[j][i] |= val;
		}
	}
	return 0;
}

static struct tmp401_data *tmp401_update_device(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct tmp401_data *data = i2c_get_clientdata(client);
	struct tmp401_data *ret = data;
	int val;

	mutex_lock(&data->update_lock);

	if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
		val = i2c_smbus_read_byte_data(client, TMP401_STATUS);
		if (val < 0) {
			ret = ERR_PTR(val);
			goto abort;
		}
		data->status = val;
		val = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
		if (val < 0) {
			ret = ERR_PTR(val);
			goto abort;
		}
		data->config = val;
		val = tmp401_update_device_reg16(client, data);
		if (val < 0) {
			ret = ERR_PTR(val);
			goto abort;
		}
		val = i2c_smbus_read_byte_data(client, TMP401_TEMP_CRIT_HYST);
		if (val < 0) {
			ret = ERR_PTR(val);
			goto abort;
		}
		data->temp_crit_hyst = val;

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

abort:
	mutex_unlock(&data->update_lock);
	return ret;
}

static ssize_t show_temp(struct device *dev,
			 struct device_attribute *devattr, char *buf)
{
	int nr = to_sensor_dev_attr_2(devattr)->nr;
	int index = to_sensor_dev_attr_2(devattr)->index;
	struct tmp401_data *data = tmp401_update_device(dev);

	if (IS_ERR(data))
		return PTR_ERR(data);

	return sprintf(buf, "%d\n",
		tmp401_register_to_temp(data->temp[nr][index], data->config));
}

static ssize_t show_temp_crit_hyst(struct device *dev,
	struct device_attribute *devattr, char *buf)
{
	int temp, index = to_sensor_dev_attr(devattr)->index;
	struct tmp401_data *data = tmp401_update_device(dev);

	if (IS_ERR(data))
		return PTR_ERR(data);

	mutex_lock(&data->update_lock);
	temp = tmp401_register_to_temp(data->temp[3][index], data->config);
	temp -= data->temp_crit_hyst * 1000;
	mutex_unlock(&data->update_lock);

	return sprintf(buf, "%d\n", temp);
}

static ssize_t show_status(struct device *dev,
	struct device_attribute *devattr, char *buf)
{
	int mask = to_sensor_dev_attr(devattr)->index;
	struct tmp401_data *data = tmp401_update_device(dev);

	if (IS_ERR(data))
		return PTR_ERR(data);

	return sprintf(buf, "%d\n", !!(data->status & mask));
}

static ssize_t store_temp(struct device *dev, struct device_attribute *devattr,
			  const char *buf, size_t count)
{
	int nr = to_sensor_dev_attr_2(devattr)->nr;
	int index = to_sensor_dev_attr_2(devattr)->index;
	struct i2c_client *client = to_i2c_client(dev);
	struct tmp401_data *data = tmp401_update_device(dev);
	long val;
	u16 reg;

	if (IS_ERR(data))
		return PTR_ERR(data);

	if (kstrtol(buf, 10, &val))
		return -EINVAL;

	reg = tmp401_temp_to_register(val, data->config, nr == 3 ? 8 : 4);

	mutex_lock(&data->update_lock);

	i2c_smbus_write_byte_data(client,
				  TMP401_TEMP_MSB_WRITE[nr][index],
				  reg >> 8);
	if (nr != 3) {
		i2c_smbus_write_byte_data(client,
					  TMP401_TEMP_LSB[nr][index],
					  reg & 0xFF);
	}
	data->temp[nr][index] = reg;

	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t store_temp_crit_hyst(struct device *dev, struct device_attribute
	*devattr, const char *buf, size_t count)
{
	int temp, index = to_sensor_dev_attr(devattr)->index;
	struct tmp401_data *data = tmp401_update_device(dev);
	long val;
	u8 reg;

	if (IS_ERR(data))
		return PTR_ERR(data);

	if (kstrtol(buf, 10, &val))
		return -EINVAL;

	if (data->config & TMP401_CONFIG_RANGE)
		val = clamp_val(val, -64000, 191000);
	else
		val = clamp_val(val, 0, 127000);

	mutex_lock(&data->update_lock);
	temp = tmp401_register_to_temp(data->temp[3][index], data->config);
	val = clamp_val(val, temp - 255000, temp);
	reg = ((temp - val) + 500) / 1000;

	i2c_smbus_write_byte_data(to_i2c_client(dev), TMP401_TEMP_CRIT_HYST,
				  reg);

	data->temp_crit_hyst = reg;

	mutex_unlock(&data->update_lock);

	return count;
}

/*
 * Resets the historical measurements of minimum and maximum temperatures.
 * This is done by writing any value to any of the minimum/maximum registers
 * (0x30-0x37).
 */
static ssize_t reset_temp_history(struct device *dev,
	struct device_attribute	*devattr, const char *buf, size_t count)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct tmp401_data *data = i2c_get_clientdata(client);
	long val;

	if (kstrtol(buf, 10, &val))
		return -EINVAL;

	if (val != 1) {
		dev_err(dev,
			"temp_reset_history value %ld not supported. Use 1 to reset the history!\n",
			val);
		return -EINVAL;
	}
	mutex_lock(&data->update_lock);
	i2c_smbus_write_byte_data(client, TMP401_TEMP_MSB_WRITE[5][0], val);
	data->valid = 0;
	mutex_unlock(&data->update_lock);

	return count;
}

static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0);
static SENSOR_DEVICE_ATTR_2(temp1_min, S_IWUSR | S_IRUGO, show_temp,
			    store_temp, 1, 0);
static SENSOR_DEVICE_ATTR_2(temp1_max, S_IWUSR | S_IRUGO, show_temp,
			    store_temp, 2, 0);
static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IWUSR | S_IRUGO, show_temp,
			    store_temp, 3, 0);
static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO,
			  show_temp_crit_hyst, store_temp_crit_hyst, 0);
static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_status, NULL,
			  TMP401_STATUS_LOCAL_LOW);
static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_status, NULL,
			  TMP401_STATUS_LOCAL_HIGH);
static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_status, NULL,
			  TMP401_STATUS_LOCAL_CRIT);
static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 0, 1);
static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp,
			    store_temp, 1, 1);
static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp,
			    store_temp, 2, 1);
static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IWUSR | S_IRUGO, show_temp,
			    store_temp, 3, 1);
static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temp_crit_hyst,
			  NULL, 1);
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_status, NULL,
			  TMP401_STATUS_REMOTE_OPEN);
static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_status, NULL,
			  TMP401_STATUS_REMOTE_LOW);
static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_status, NULL,
			  TMP401_STATUS_REMOTE_HIGH);
static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_status, NULL,
			  TMP401_STATUS_REMOTE_CRIT);

static struct attribute *tmp401_attributes[] = {
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	&sensor_dev_attr_temp1_min.dev_attr.attr,
	&sensor_dev_attr_temp1_max.dev_attr.attr,
	&sensor_dev_attr_temp1_crit.dev_attr.attr,
	&sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
	&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
	&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
	&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,

	&sensor_dev_attr_temp2_input.dev_attr.attr,
	&sensor_dev_attr_temp2_min.dev_attr.attr,
	&sensor_dev_attr_temp2_max.dev_attr.attr,
	&sensor_dev_attr_temp2_crit.dev_attr.attr,
	&sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
	&sensor_dev_attr_temp2_fault.dev_attr.attr,
	&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
	&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
	&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,

	NULL
};

static const struct attribute_group tmp401_group = {
	.attrs = tmp401_attributes,
};

/*
 * Additional features of the TMP411 chip.
 * The TMP411 stores the minimum and maximum
 * temperature measured since power-on, chip-reset, or
 * minimum and maximum register reset for both the local
 * and remote channels.
 */
static SENSOR_DEVICE_ATTR_2(temp1_lowest, S_IRUGO, show_temp, NULL, 4, 0);
static SENSOR_DEVICE_ATTR_2(temp1_highest, S_IRUGO, show_temp, NULL, 5, 0);
static SENSOR_DEVICE_ATTR_2(temp2_lowest, S_IRUGO, show_temp, NULL, 4, 1);
static SENSOR_DEVICE_ATTR_2(temp2_highest, S_IRUGO, show_temp, NULL, 5, 1);
static SENSOR_DEVICE_ATTR(temp_reset_history, S_IWUSR, NULL, reset_temp_history,
			  0);

static struct attribute *tmp411_attributes[] = {
	&sensor_dev_attr_temp1_highest.dev_attr.attr,
	&sensor_dev_attr_temp1_lowest.dev_attr.attr,
	&sensor_dev_attr_temp2_highest.dev_attr.attr,
	&sensor_dev_attr_temp2_lowest.dev_attr.attr,
	&sensor_dev_attr_temp_reset_history.dev_attr.attr,
	NULL
};

static const struct attribute_group tmp411_group = {
	.attrs = tmp411_attributes,
};

/*
 * Begin non sysfs callback code (aka Real code)
 */

static void tmp401_init_client(struct i2c_client *client)
{
	int config, config_orig;

	/* Set the conversion rate to 2 Hz */
	i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, 5);

	/* Start conversions (disable shutdown if necessary) */
	config = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
	if (config < 0) {
		dev_warn(&client->dev, "Initialization failed!\n");
		return;
	}

	config_orig = config;
	config &= ~TMP401_CONFIG_SHUTDOWN;

	if (config != config_orig)
		i2c_smbus_write_byte_data(client, TMP401_CONFIG_WRITE, config);
}

static int tmp401_detect(struct i2c_client *client,
			 struct i2c_board_info *info)
{
	enum chips kind;
	struct i2c_adapter *adapter = client->adapter;
	u8 reg;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return -ENODEV;

	/* Detect and identify the chip */
	reg = i2c_smbus_read_byte_data(client, TMP401_MANUFACTURER_ID_REG);
	if (reg != TMP401_MANUFACTURER_ID)
		return -ENODEV;

	reg = i2c_smbus_read_byte_data(client, TMP401_DEVICE_ID_REG);

	switch (reg) {
	case TMP401_DEVICE_ID:
		if (client->addr != 0x4c)
			return -ENODEV;
		kind = tmp401;
		break;
	case TMP411A_DEVICE_ID:
		if (client->addr != 0x4c)
			return -ENODEV;
		kind = tmp411;
		break;
	case TMP411B_DEVICE_ID:
		if (client->addr != 0x4d)
			return -ENODEV;
		kind = tmp411;
		break;
	case TMP411C_DEVICE_ID:
		if (client->addr != 0x4e)
			return -ENODEV;
		kind = tmp411;
		break;
	case TMP431_DEVICE_ID:
		if (client->addr == 0x4e)
			return -ENODEV;
		kind = tmp431;
		break;
	default:
		return -ENODEV;
	}

	reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
	if (reg & 0x1b)
		return -ENODEV;

	reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE_READ);
	/* Datasheet says: 0x1-0x6 */
	if (reg > 15)
		return -ENODEV;

	strlcpy(info->type, tmp401_id[kind].name, I2C_NAME_SIZE);

	return 0;
}

static int tmp401_remove(struct i2c_client *client)
{
	struct device *dev = &client->dev;
	struct tmp401_data *data = i2c_get_clientdata(client);

	if (data->hwmon_dev)
		hwmon_device_unregister(data->hwmon_dev);

	sysfs_remove_group(&dev->kobj, &tmp401_group);

	if (data->kind == tmp411)
		sysfs_remove_group(&dev->kobj, &tmp411_group);

	return 0;
}

static int tmp401_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct device *dev = &client->dev;
	int err;
	struct tmp401_data *data;
	const char *names[] = { "TMP401", "TMP411", "TMP431" };

	data = devm_kzalloc(dev, sizeof(struct tmp401_data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	i2c_set_clientdata(client, data);
	mutex_init(&data->update_lock);
	data->kind = id->driver_data;

	/* Initialize the TMP401 chip */
	tmp401_init_client(client);

	/* Register sysfs hooks */
	err = sysfs_create_group(&dev->kobj, &tmp401_group);
	if (err)
		return err;

	/* Register additional tmp411 sysfs hooks */
	if (data->kind == tmp411) {
		err = sysfs_create_group(&dev->kobj, &tmp411_group);
		if (err)
			goto exit_remove;
	}

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

	dev_info(dev, "Detected TI %s chip\n", names[data->kind]);

	return 0;

exit_remove:
	tmp401_remove(client);
	return err;
}

static struct i2c_driver tmp401_driver = {
	.class		= I2C_CLASS_HWMON,
	.driver = {
		.name	= "tmp401",
	},
	.probe		= tmp401_probe,
	.remove		= tmp401_remove,
	.id_table	= tmp401_id,
	.detect		= tmp401_detect,
	.address_list	= normal_i2c,
};

module_i2c_driver(tmp401_driver);

MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_DESCRIPTION("Texas Instruments TMP401 temperature sensor driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
ab2b79d5 HG	1	/* tmp401.c
	2	*
	3	* Copyright (C) 2007,2008 Hans de Goede <hdegoede@redhat.com>
fce0758f AP	4	* Preliminary tmp411 support by:
	5	* Gabriel Konat, Sander Leget, Wouter Willems
	6	* Copyright (C) 2009 Andre Prendel <andre.prendel@gmx.de>
ab2b79d5 HG	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	21	*/
	22
	23	/*
	24	* Driver for the Texas Instruments TMP401 SMBUS temperature sensor IC.
	25	*
	26	* Note this IC is in some aspect similar to the LM90, but it has quite a
	27	* few differences too, for example the local temp has a higher resolution
	28	* and thus has 16 bits registers for its value and limit instead of 8 bits.
	29	*/
	30
	31	#include <linux/module.h>
	32	#include <linux/init.h>
947e9271	33	#include <linux/bitops.h>
ab2b79d5 HG	34	#include <linux/slab.h>
	35	#include <linux/jiffies.h>
	36	#include <linux/i2c.h>
	37	#include <linux/hwmon.h>
	38	#include <linux/hwmon-sysfs.h>
	39	#include <linux/err.h>
	40	#include <linux/mutex.h>
	41	#include <linux/sysfs.h>
	42
	43	/* Addresses to scan */
a1fac92b	44	static const unsigned short normal_i2c[] = { 0x4c, 0x4d, 0x4e, I2C_CLIENT_END };
ab2b79d5	45
a1fac92b	46	enum chips { tmp401, tmp411, tmp431 };
ab2b79d5 HG	47
	48	/*
	49	* The TMP401 registers, note some registers have different addresses for
	50	* reading and writing
	51	*/
	52	#define TMP401_STATUS 0x02
	53	#define TMP401_CONFIG_READ 0x03
	54	#define TMP401_CONFIG_WRITE 0x09
	55	#define TMP401_CONVERSION_RATE_READ 0x04
	56	#define TMP401_CONVERSION_RATE_WRITE 0x0A
	57	#define TMP401_TEMP_CRIT_HYST 0x21
ab2b79d5 HG	58	#define TMP401_MANUFACTURER_ID_REG 0xFE
	59	#define TMP401_DEVICE_ID_REG 0xFF
	60
14f2a665 GR	61	static const u8 TMP401_TEMP_MSB_READ[6][2] = {
	62	{ 0x00, 0x01 }, /* temp */
	63	{ 0x06, 0x08 }, /* low limit */
	64	{ 0x05, 0x07 }, /* high limit */
	65	{ 0x20, 0x19 }, /* therm (crit) limit */
	66	{ 0x30, 0x34 }, /* lowest */
	67	{ 0x32, 0x36 }, /* highest */
	68	};
	69
	70	static const u8 TMP401_TEMP_MSB_WRITE[6][2] = {
	71	{ 0, 0 }, /* temp (unused) */
	72	{ 0x0C, 0x0E }, /* low limit */
	73	{ 0x0B, 0x0D }, /* high limit */
	74	{ 0x20, 0x19 }, /* therm (crit) limit */
	75	{ 0x30, 0x34 }, /* lowest */
	76	{ 0x32, 0x36 }, /* highest */
	77	};
	78
	79	static const u8 TMP401_TEMP_LSB[6][2] = {
	80	{ 0x15, 0x10 }, /* temp */
	81	{ 0x17, 0x14 }, /* low limit */
	82	{ 0x16, 0x13 }, /* high limit */
	83	{ 0, 0 }, /* therm (crit) limit (unused) */
	84	{ 0x31, 0x35 }, /* lowest */
	85	{ 0x33, 0x37 }, /* highest */
	86	};
fce0758f	87
ab2b79d5	88	/* Flags */
947e9271 GR	89	#define TMP401_CONFIG_RANGE BIT(2)
	90	#define TMP401_CONFIG_SHUTDOWN BIT(6)
	91	#define TMP401_STATUS_LOCAL_CRIT BIT(0)
	92	#define TMP401_STATUS_REMOTE_CRIT BIT(1)
	93	#define TMP401_STATUS_REMOTE_OPEN BIT(2)
	94	#define TMP401_STATUS_REMOTE_LOW BIT(3)
	95	#define TMP401_STATUS_REMOTE_HIGH BIT(4)
	96	#define TMP401_STATUS_LOCAL_LOW BIT(5)
	97	#define TMP401_STATUS_LOCAL_HIGH BIT(6)
ab2b79d5 HG	98
	99	/* Manufacturer / Device ID's */
	100	#define TMP401_MANUFACTURER_ID 0x55
	101	#define TMP401_DEVICE_ID 0x11
4ce5b1fe GR	102	#define TMP411A_DEVICE_ID 0x12
	103	#define TMP411B_DEVICE_ID 0x13
	104	#define TMP411C_DEVICE_ID 0x10
a1fac92b	105	#define TMP431_DEVICE_ID 0x31
ab2b79d5	106
ab2b79d5 HG	107	/*
	108	* Driver data (common to all clients)
	109	*/
	110
	111	static const struct i2c_device_id tmp401_id[] = {
	112	{ "tmp401", tmp401 },
fce0758f	113	{ "tmp411", tmp411 },
a1fac92b	114	{ "tmp431", tmp431 },
ab2b79d5 HG	115	{ }
	116	};
	117	MODULE_DEVICE_TABLE(i2c, tmp401_id);
	118
ab2b79d5 HG	119	/*
	120	* Client data (each client gets its own)
	121	*/
	122
	123	struct tmp401_data {
	124	struct device *hwmon_dev;
	125	struct mutex update_lock;
	126	char valid; /* zero until following fields are valid */
	127	unsigned long last_updated; /* in jiffies */
dc71afe5	128	enum chips kind;
ab2b79d5 HG	129
	130	/* register values */
	131	u8 status;
	132	u8 config;
14f2a665	133	u16 temp[6][2];
ab2b79d5 HG	134	u8 temp_crit_hyst;
	135	};
	136
	137	/*
	138	* Sysfs attr show / store functions
	139	*/
	140
	141	static int tmp401_register_to_temp(u16 reg, u8 config)
	142	{
	143	int temp = reg;
	144
	145	if (config & TMP401_CONFIG_RANGE)
	146	temp -= 64 * 256;
	147
14f2a665	148	return DIV_ROUND_CLOSEST(temp * 125, 32);
ab2b79d5 HG	149	}
ab2b79d5 HG	150
14f2a665	151	static u16 tmp401_temp_to_register(long temp, u8 config, int zbits)
ab2b79d5 HG	152	{
ab2b79d5 HG	153	if (config & TMP401_CONFIG_RANGE) {
2a844c14	154	temp = clamp_val(temp, -64000, 191000);
ab2b79d5 HG	155	temp += 64000;
ab2b79d5 HG	156	} else
2a844c14	157	temp = clamp_val(temp, 0, 127000);
ab2b79d5	158
14f2a665	159	return DIV_ROUND_CLOSEST(temp * (1 << (8 - zbits)), 1000) << zbits;
ab2b79d5 HG	160	}
ab2b79d5 HG	161
14f2a665 GR	162	static int tmp401_update_device_reg16(struct i2c_client *client,
14f2a665 GR	163	struct tmp401_data *data)
ea63c2b9	164	{
14f2a665 GR	165	int i, j, val;
	166	int num_regs = data->kind == tmp411 ? 6 : 4;
	167
	168	for (i = 0; i < 2; i++) { /* local / rem1 */
	169	for (j = 0; j < num_regs; j++) { /* temp / low / ... */
	170	/*
	171	* High byte must be read first immediately followed
	172	* by the low byte
	173	*/
	174	val = i2c_smbus_read_byte_data(client,
	175	TMP401_TEMP_MSB_READ[j][i]);
	176	if (val < 0)
	177	return val;
	178	data->temp[j][i] = val << 8;
	179	if (j == 3) /* crit is msb only */
	180	continue;
	181	val = i2c_smbus_read_byte_data(client,
	182	TMP401_TEMP_LSB[j][i]);
	183	if (val < 0)
	184	return val;
	185	data->temp[j][i] \|= val;
ea63c2b9 AP	186	}
ea63c2b9 AP	187	}
14f2a665	188	return 0;
ea63c2b9 AP	189	}
	190
	191	static struct tmp401_data tmp401_update_device(struct device dev)
	192	{
	193	struct i2c_client *client = to_i2c_client(dev);
	194	struct tmp401_data *data = i2c_get_clientdata(client);
14f2a665 GR	195	struct tmp401_data *ret = data;
14f2a665 GR	196	int val;
ea63c2b9 AP	197
	198	mutex_lock(&data->update_lock);
	199
	200	if (time_after(jiffies, data->last_updated + HZ) \|\| !data->valid) {
14f2a665 GR	201	val = i2c_smbus_read_byte_data(client, TMP401_STATUS);
	202	if (val < 0) {
	203	ret = ERR_PTR(val);
	204	goto abort;
	205	}
	206	data->status = val;
	207	val = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
	208	if (val < 0) {
	209	ret = ERR_PTR(val);
	210	goto abort;
	211	}
	212	data->config = val;
	213	val = tmp401_update_device_reg16(client, data);
	214	if (val < 0) {
	215	ret = ERR_PTR(val);
	216	goto abort;
	217	}
	218	val = i2c_smbus_read_byte_data(client, TMP401_TEMP_CRIT_HYST);
	219	if (val < 0) {
	220	ret = ERR_PTR(val);
	221	goto abort;
	222	}
	223	data->temp_crit_hyst = val;
ea63c2b9 AP	224
	225	data->last_updated = jiffies;
	226	data->valid = 1;
	227	}
	228
14f2a665	229	abort:
ea63c2b9	230	mutex_unlock(&data->update_lock);
14f2a665	231	return ret;
ab2b79d5 HG	232	}
ab2b79d5 HG	233
14f2a665 GR	234	static ssize_t show_temp(struct device *dev,
14f2a665 GR	235	struct device_attribute devattr, char buf)
ab2b79d5	236	{
14f2a665 GR	237	int nr = to_sensor_dev_attr_2(devattr)->nr;
14f2a665 GR	238	int index = to_sensor_dev_attr_2(devattr)->index;
ab2b79d5 HG	239	struct tmp401_data *data = tmp401_update_device(dev);
ab2b79d5 HG	240
14f2a665 GR	241	if (IS_ERR(data))
14f2a665 GR	242	return PTR_ERR(data);
ab2b79d5 HG	243
ab2b79d5 HG	244	return sprintf(buf, "%d\n",
14f2a665	245	tmp401_register_to_temp(data->temp[nr][index], data->config));
ab2b79d5 HG	246	}
	247
	248	static ssize_t show_temp_crit_hyst(struct device *dev,
	249	struct device_attribute devattr, char buf)
	250	{
	251	int temp, index = to_sensor_dev_attr(devattr)->index;
	252	struct tmp401_data *data = tmp401_update_device(dev);
	253
14f2a665 GR	254	if (IS_ERR(data))
	255	return PTR_ERR(data);
	256
ab2b79d5	257	mutex_lock(&data->update_lock);
14f2a665	258	temp = tmp401_register_to_temp(data->temp[3][index], data->config);
ab2b79d5 HG	259	temp -= data->temp_crit_hyst * 1000;
	260	mutex_unlock(&data->update_lock);
	261
	262	return sprintf(buf, "%d\n", temp);
	263	}
	264
	265	static ssize_t show_status(struct device *dev,
	266	struct device_attribute devattr, char buf)
	267	{
	268	int mask = to_sensor_dev_attr(devattr)->index;
	269	struct tmp401_data *data = tmp401_update_device(dev);
	270
14f2a665 GR	271	if (IS_ERR(data))
14f2a665 GR	272	return PTR_ERR(data);
ab2b79d5	273
14f2a665	274	return sprintf(buf, "%d\n", !!(data->status & mask));
ab2b79d5 HG	275	}
ab2b79d5 HG	276
14f2a665 GR	277	static ssize_t store_temp(struct device dev, struct device_attribute devattr,
14f2a665 GR	278	const char *buf, size_t count)
ab2b79d5	279	{
14f2a665 GR	280	int nr = to_sensor_dev_attr_2(devattr)->nr;
	281	int index = to_sensor_dev_attr_2(devattr)->index;
	282	struct i2c_client *client = to_i2c_client(dev);
ab2b79d5 HG	283	struct tmp401_data *data = tmp401_update_device(dev);
	284	long val;
	285	u16 reg;
	286
14f2a665 GR	287	if (IS_ERR(data))
14f2a665 GR	288	return PTR_ERR(data);
ab2b79d5	289
179c4fdb	290	if (kstrtol(buf, 10, &val))
ab2b79d5 HG	291	return -EINVAL;
ab2b79d5 HG	292
14f2a665	293	reg = tmp401_temp_to_register(val, data->config, nr == 3 ? 8 : 4);
ab2b79d5 HG	294
	295	mutex_lock(&data->update_lock);
	296
14f2a665 GR	297	i2c_smbus_write_byte_data(client,
	298	TMP401_TEMP_MSB_WRITE[nr][index],
	299	reg >> 8);
	300	if (nr != 3) {
	301	i2c_smbus_write_byte_data(client,
	302	TMP401_TEMP_LSB[nr][index],
	303	reg & 0xFF);
	304	}
	305	data->temp[nr][index] = reg;
ab2b79d5 HG	306
	307	mutex_unlock(&data->update_lock);
	308
	309	return count;
	310	}
	311
	312	static ssize_t store_temp_crit_hyst(struct device *dev, struct device_attribute
	313	devattr, const char buf, size_t count)
	314	{
	315	int temp, index = to_sensor_dev_attr(devattr)->index;
	316	struct tmp401_data *data = tmp401_update_device(dev);
	317	long val;
	318	u8 reg;
	319
14f2a665 GR	320	if (IS_ERR(data))
	321	return PTR_ERR(data);
	322
179c4fdb	323	if (kstrtol(buf, 10, &val))
ab2b79d5 HG	324	return -EINVAL;
	325
	326	if (data->config & TMP401_CONFIG_RANGE)
2a844c14	327	val = clamp_val(val, -64000, 191000);
ab2b79d5	328	else
2a844c14	329	val = clamp_val(val, 0, 127000);
ab2b79d5 HG	330
ab2b79d5 HG	331	mutex_lock(&data->update_lock);
14f2a665	332	temp = tmp401_register_to_temp(data->temp[3][index], data->config);
2a844c14	333	val = clamp_val(val, temp - 255000, temp);
ab2b79d5 HG	334	reg = ((temp - val) + 500) / 1000;
ab2b79d5 HG	335
14f2a665 GR	336	i2c_smbus_write_byte_data(to_i2c_client(dev), TMP401_TEMP_CRIT_HYST,
14f2a665 GR	337	reg);
ab2b79d5 HG	338
	339	data->temp_crit_hyst = reg;
	340
	341	mutex_unlock(&data->update_lock);
	342
	343	return count;
	344	}
	345
fce0758f AP	346	/*
	347	* Resets the historical measurements of minimum and maximum temperatures.
	348	* This is done by writing any value to any of the minimum/maximum registers
	349	* (0x30-0x37).
	350	*/
	351	static ssize_t reset_temp_history(struct device *dev,
	352	struct device_attribute devattr, const char buf, size_t count)
	353	{
8eb6d90f GR	354	struct i2c_client *client = to_i2c_client(dev);
8eb6d90f GR	355	struct tmp401_data *data = i2c_get_clientdata(client);
fce0758f AP	356	long val;
fce0758f AP	357
179c4fdb	358	if (kstrtol(buf, 10, &val))
fce0758f AP	359	return -EINVAL;
	360
	361	if (val != 1) {
b55f3757 GR	362	dev_err(dev,
	363	"temp_reset_history value %ld not supported. Use 1 to reset the history!\n",
	364	val);
fce0758f AP	365	return -EINVAL;
fce0758f AP	366	}
8eb6d90f GR	367	mutex_lock(&data->update_lock);
	368	i2c_smbus_write_byte_data(client, TMP401_TEMP_MSB_WRITE[5][0], val);
	369	data->valid = 0;
	370	mutex_unlock(&data->update_lock);
fce0758f AP	371
	372	return count;
	373	}
	374
14f2a665 GR	375	static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0);
	376	static SENSOR_DEVICE_ATTR_2(temp1_min, S_IWUSR \| S_IRUGO, show_temp,
	377	store_temp, 1, 0);
	378	static SENSOR_DEVICE_ATTR_2(temp1_max, S_IWUSR \| S_IRUGO, show_temp,
	379	store_temp, 2, 0);
	380	static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IWUSR \| S_IRUGO, show_temp,
	381	store_temp, 3, 0);
b4e665c7 GR	382	static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR \| S_IRUGO,
	383	show_temp_crit_hyst, store_temp_crit_hyst, 0);
	384	static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_status, NULL,
	385	TMP401_STATUS_LOCAL_LOW);
	386	static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_status, NULL,
	387	TMP401_STATUS_LOCAL_HIGH);
	388	static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_status, NULL,
	389	TMP401_STATUS_LOCAL_CRIT);
14f2a665 GR	390	static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 0, 1);
	391	static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR \| S_IRUGO, show_temp,
	392	store_temp, 1, 1);
	393	static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR \| S_IRUGO, show_temp,
	394	store_temp, 2, 1);
	395	static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IWUSR \| S_IRUGO, show_temp,
	396	store_temp, 3, 1);
b4e665c7 GR	397	static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temp_crit_hyst,
	398	NULL, 1);
	399	static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_status, NULL,
	400	TMP401_STATUS_REMOTE_OPEN);
	401	static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_status, NULL,
	402	TMP401_STATUS_REMOTE_LOW);
	403	static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_status, NULL,
	404	TMP401_STATUS_REMOTE_HIGH);
	405	static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_status, NULL,
	406	TMP401_STATUS_REMOTE_CRIT);
	407
	408	static struct attribute *tmp401_attributes[] = {
	409	&sensor_dev_attr_temp1_input.dev_attr.attr,
	410	&sensor_dev_attr_temp1_min.dev_attr.attr,
	411	&sensor_dev_attr_temp1_max.dev_attr.attr,
	412	&sensor_dev_attr_temp1_crit.dev_attr.attr,
	413	&sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
	414	&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
	415	&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
	416	&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
	417
	418	&sensor_dev_attr_temp2_input.dev_attr.attr,
	419	&sensor_dev_attr_temp2_min.dev_attr.attr,
	420	&sensor_dev_attr_temp2_max.dev_attr.attr,
	421	&sensor_dev_attr_temp2_crit.dev_attr.attr,
	422	&sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
	423	&sensor_dev_attr_temp2_fault.dev_attr.attr,
	424	&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
	425	&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
	426	&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
	427
	428	NULL
	429	};
	430
	431	static const struct attribute_group tmp401_group = {
	432	.attrs = tmp401_attributes,
ab2b79d5 HG	433	};
ab2b79d5 HG	434
fce0758f AP	435	/*
	436	* Additional features of the TMP411 chip.
	437	* The TMP411 stores the minimum and maximum
	438	* temperature measured since power-on, chip-reset, or
	439	* minimum and maximum register reset for both the local
	440	* and remote channels.
	441	*/
14f2a665 GR	442	static SENSOR_DEVICE_ATTR_2(temp1_lowest, S_IRUGO, show_temp, NULL, 4, 0);
	443	static SENSOR_DEVICE_ATTR_2(temp1_highest, S_IRUGO, show_temp, NULL, 5, 0);
	444	static SENSOR_DEVICE_ATTR_2(temp2_lowest, S_IRUGO, show_temp, NULL, 4, 1);
	445	static SENSOR_DEVICE_ATTR_2(temp2_highest, S_IRUGO, show_temp, NULL, 5, 1);
b4e665c7 GR	446	static SENSOR_DEVICE_ATTR(temp_reset_history, S_IWUSR, NULL, reset_temp_history,
	447	0);
	448
	449	static struct attribute *tmp411_attributes[] = {
	450	&sensor_dev_attr_temp1_highest.dev_attr.attr,
	451	&sensor_dev_attr_temp1_lowest.dev_attr.attr,
	452	&sensor_dev_attr_temp2_highest.dev_attr.attr,
	453	&sensor_dev_attr_temp2_lowest.dev_attr.attr,
	454	&sensor_dev_attr_temp_reset_history.dev_attr.attr,
	455	NULL
	456	};
	457
	458	static const struct attribute_group tmp411_group = {
	459	.attrs = tmp411_attributes,
fce0758f AP	460	};
fce0758f AP	461
ab2b79d5 HG	462	/*
	463	* Begin non sysfs callback code (aka Real code)
	464	*/
	465
	466	static void tmp401_init_client(struct i2c_client *client)
	467	{
	468	int config, config_orig;
	469
	470	/* Set the conversion rate to 2 Hz */
	471	i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, 5);
	472
	473	/* Start conversions (disable shutdown if necessary) */
	474	config = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
	475	if (config < 0) {
	476	dev_warn(&client->dev, "Initialization failed!\n");
	477	return;
	478	}
	479
	480	config_orig = config;
	481	config &= ~TMP401_CONFIG_SHUTDOWN;
	482
	483	if (config != config_orig)
	484	i2c_smbus_write_byte_data(client, TMP401_CONFIG_WRITE, config);
	485	}
	486
310ec792	487	static int tmp401_detect(struct i2c_client *client,
ab2b79d5 HG	488	struct i2c_board_info *info)
ab2b79d5 HG	489	{
dbe73c8f	490	enum chips kind;
ab2b79d5	491	struct i2c_adapter *adapter = client->adapter;
dbe73c8f	492	u8 reg;
ab2b79d5 HG	493
	494	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
	495	return -ENODEV;
	496
	497	/* Detect and identify the chip */
dbe73c8f JD	498	reg = i2c_smbus_read_byte_data(client, TMP401_MANUFACTURER_ID_REG);
	499	if (reg != TMP401_MANUFACTURER_ID)
	500	return -ENODEV;
ab2b79d5	501
dbe73c8f	502	reg = i2c_smbus_read_byte_data(client, TMP401_DEVICE_ID_REG);
ab2b79d5	503
dbe73c8f JD	504	switch (reg) {
dbe73c8f JD	505	case TMP401_DEVICE_ID:
a1fac92b GR	506	if (client->addr != 0x4c)
a1fac92b GR	507	return -ENODEV;
dbe73c8f JD	508	kind = tmp401;
dbe73c8f JD	509	break;
4ce5b1fe GR	510	case TMP411A_DEVICE_ID:
	511	if (client->addr != 0x4c)
	512	return -ENODEV;
	513	kind = tmp411;
	514	break;
	515	case TMP411B_DEVICE_ID:
	516	if (client->addr != 0x4d)
	517	return -ENODEV;
	518	kind = tmp411;
	519	break;
	520	case TMP411C_DEVICE_ID:
	521	if (client->addr != 0x4e)
	522	return -ENODEV;
dbe73c8f JD	523	kind = tmp411;
dbe73c8f JD	524	break;
a1fac92b GR	525	case TMP431_DEVICE_ID:
	526	if (client->addr == 0x4e)
	527	return -ENODEV;
	528	kind = tmp431;
	529	break;
dbe73c8f JD	530	default:
dbe73c8f JD	531	return -ENODEV;
ab2b79d5	532	}
dbe73c8f JD	533
	534	reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
	535	if (reg & 0x1b)
	536	return -ENODEV;
	537
	538	reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE_READ);
	539	/* Datasheet says: 0x1-0x6 */
	540	if (reg > 15)
	541	return -ENODEV;
	542
dc71afe5	543	strlcpy(info->type, tmp401_id[kind].name, I2C_NAME_SIZE);
ab2b79d5 HG	544
	545	return 0;
	546	}
	547
ea63c2b9 AP	548	static int tmp401_remove(struct i2c_client *client)
ea63c2b9 AP	549	{
b4e665c7	550	struct device *dev = &client->dev;
ea63c2b9	551	struct tmp401_data *data = i2c_get_clientdata(client);
ea63c2b9 AP	552
	553	if (data->hwmon_dev)
	554	hwmon_device_unregister(data->hwmon_dev);
	555
b4e665c7	556	sysfs_remove_group(&dev->kobj, &tmp401_group);
ea63c2b9	557
b4e665c7 GR	558	if (data->kind == tmp411)
b4e665c7 GR	559	sysfs_remove_group(&dev->kobj, &tmp411_group);
ea63c2b9	560
ea63c2b9 AP	561	return 0;
	562	}
	563
ab2b79d5 HG	564	static int tmp401_probe(struct i2c_client *client,
	565	const struct i2c_device_id *id)
	566	{
b4e665c7 GR	567	struct device *dev = &client->dev;
b4e665c7 GR	568	int err;
ab2b79d5	569	struct tmp401_data *data;
a1fac92b	570	const char *names[] = { "TMP401", "TMP411", "TMP431" };
ab2b79d5	571
b4e665c7	572	data = devm_kzalloc(dev, sizeof(struct tmp401_data), GFP_KERNEL);
ab2b79d5 HG	573	if (!data)
	574	return -ENOMEM;
	575
	576	i2c_set_clientdata(client, data);
	577	mutex_init(&data->update_lock);
fce0758f	578	data->kind = id->driver_data;
ab2b79d5 HG	579
	580	/* Initialize the TMP401 chip */
	581	tmp401_init_client(client);
	582
	583	/* Register sysfs hooks */
b4e665c7 GR	584	err = sysfs_create_group(&dev->kobj, &tmp401_group);
	585	if (err)
	586	return err;
ab2b79d5	587
a80581d0	588	/* Register additional tmp411 sysfs hooks */
fce0758f	589	if (data->kind == tmp411) {
b4e665c7 GR	590	err = sysfs_create_group(&dev->kobj, &tmp411_group);
	591	if (err)
	592	goto exit_remove;
fce0758f AP	593	}
fce0758f AP	594
b4e665c7	595	data->hwmon_dev = hwmon_device_register(dev);
ab2b79d5 HG	596	if (IS_ERR(data->hwmon_dev)) {
	597	err = PTR_ERR(data->hwmon_dev);
	598	data->hwmon_dev = NULL;
	599	goto exit_remove;
	600	}
	601
b4e665c7	602	dev_info(dev, "Detected TI %s chip\n", names[data->kind]);
ab2b79d5 HG	603
	604	return 0;
	605
	606	exit_remove:
0df9fc7b	607	tmp401_remove(client);
ab2b79d5 HG	608	return err;
	609	}
	610
ea63c2b9 AP	611	static struct i2c_driver tmp401_driver = {
	612	.class = I2C_CLASS_HWMON,
	613	.driver = {
	614	.name = "tmp401",
	615	},
	616	.probe = tmp401_probe,
	617	.remove = tmp401_remove,
	618	.id_table = tmp401_id,
	619	.detect = tmp401_detect,
	620	.address_list = normal_i2c,
	621	};
ab2b79d5	622
f0967eea	623	module_i2c_driver(tmp401_driver);
ab2b79d5 HG	624
	625	MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
	626	MODULE_DESCRIPTION("Texas Instruments TMP401 temperature sensor driver");
	627	MODULE_LICENSE("GPL");