[deliverable/linux.git] / drivers / hwmon / tmp102.c

/* Texas Instruments TMP102 SMBus temperature sensor driver
 *
 * Copyright (C) 2010 Steven King <sfking@fdwdc.com>
 *
 * 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.
 */

#include <linux/delay.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/device.h>
#include <linux/jiffies.h>
#include <linux/regmap.h>
#include <linux/thermal.h>
#include <linux/of.h>

#define	DRIVER_NAME "tmp102"

#define	TMP102_TEMP_REG			0x00
#define	TMP102_CONF_REG			0x01
/* note: these bit definitions are byte swapped */
#define		TMP102_CONF_SD		0x0100
#define		TMP102_CONF_TM		0x0200
#define		TMP102_CONF_POL		0x0400
#define		TMP102_CONF_F0		0x0800
#define		TMP102_CONF_F1		0x1000
#define		TMP102_CONF_R0		0x2000
#define		TMP102_CONF_R1		0x4000
#define		TMP102_CONF_OS		0x8000
#define		TMP102_CONF_EM		0x0010
#define		TMP102_CONF_AL		0x0020
#define		TMP102_CONF_CR0		0x0040
#define		TMP102_CONF_CR1		0x0080
#define	TMP102_TLOW_REG			0x02
#define	TMP102_THIGH_REG		0x03

#define TMP102_CONFREG_MASK	(TMP102_CONF_SD | TMP102_CONF_TM | \
				 TMP102_CONF_POL | TMP102_CONF_F0 | \
				 TMP102_CONF_F1 | TMP102_CONF_OS | \
				 TMP102_CONF_EM | TMP102_CONF_AL | \
				 TMP102_CONF_CR0 | TMP102_CONF_CR1)

#define TMP102_CONFIG_CLEAR	(TMP102_CONF_SD | TMP102_CONF_OS | \
				 TMP102_CONF_CR0)
#define TMP102_CONFIG_SET	(TMP102_CONF_TM | TMP102_CONF_EM | \
				 TMP102_CONF_CR1)

#define CONVERSION_TIME_MS		35	/* in milli-seconds */

struct tmp102 {
	struct regmap *regmap;
	u16 config_orig;
	unsigned long ready_time;
};

/* convert left adjusted 13-bit TMP102 register value to milliCelsius */
static inline int tmp102_reg_to_mC(s16 val)
{
	return ((val & ~0x01) * 1000) / 128;
}

/* convert milliCelsius to left adjusted 13-bit TMP102 register value */
static inline u16 tmp102_mC_to_reg(int val)
{
	return (val * 128) / 1000;
}

static int tmp102_read_temp(void *dev, int *temp)
{
	struct tmp102 *tmp102 = dev_get_drvdata(dev);
	unsigned int reg;
	int ret;

	if (time_before(jiffies, tmp102->ready_time)) {
		dev_dbg(dev, "%s: Conversion not ready yet..\n", __func__);
		return -EAGAIN;
	}

	ret = regmap_read(tmp102->regmap, TMP102_TEMP_REG, &reg);
	if (ret < 0)
		return ret;

	*temp = tmp102_reg_to_mC(reg);

	return 0;
}

static ssize_t tmp102_show_temp(struct device *dev,
				struct device_attribute *attr,
				char *buf)
{
	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
	struct tmp102 *tmp102 = dev_get_drvdata(dev);
	int regaddr = sda->index;
	unsigned int reg;
	int err;

	if (regaddr == TMP102_TEMP_REG &&
	    time_before(jiffies, tmp102->ready_time))
		return -EAGAIN;

	err = regmap_read(tmp102->regmap, regaddr, &reg);
	if (err < 0)
		return err;

	return sprintf(buf, "%d\n", tmp102_reg_to_mC(reg));
}

static ssize_t tmp102_set_temp(struct device *dev,
			       struct device_attribute *attr,
			       const char *buf, size_t count)
{
	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
	struct tmp102 *tmp102 = dev_get_drvdata(dev);
	int reg = sda->index;
	long val;
	int err;

	if (kstrtol(buf, 10, &val) < 0)
		return -EINVAL;
	val = clamp_val(val, -256000, 255000);

	err = regmap_write(tmp102->regmap, reg, tmp102_mC_to_reg(val));
	return err ? : count;
}

static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, tmp102_show_temp, NULL,
			  TMP102_TEMP_REG);

static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, tmp102_show_temp,
			  tmp102_set_temp, TMP102_TLOW_REG);

static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, tmp102_show_temp,
			  tmp102_set_temp, TMP102_THIGH_REG);

static struct attribute *tmp102_attrs[] = {
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
	&sensor_dev_attr_temp1_max.dev_attr.attr,
	NULL
};
ATTRIBUTE_GROUPS(tmp102);

static const struct thermal_zone_of_device_ops tmp102_of_thermal_ops = {
	.get_temp = tmp102_read_temp,
};

static void tmp102_restore_config(void *data)
{
	struct tmp102 *tmp102 = data;

	regmap_write(tmp102->regmap, TMP102_CONF_REG, tmp102->config_orig);
}

static bool tmp102_is_writeable_reg(struct device *dev, unsigned int reg)
{
	return reg != TMP102_TEMP_REG;
}

static bool tmp102_is_volatile_reg(struct device *dev, unsigned int reg)
{
	return reg == TMP102_TEMP_REG;
}

static const struct regmap_config tmp102_regmap_config = {
	.reg_bits = 8,
	.val_bits = 16,
	.max_register = TMP102_THIGH_REG,
	.writeable_reg = tmp102_is_writeable_reg,
	.volatile_reg = tmp102_is_volatile_reg,
	.val_format_endian = REGMAP_ENDIAN_BIG,
	.cache_type = REGCACHE_RBTREE,
	.use_single_rw = true,
};

static int tmp102_probe(struct i2c_client *client,
				  const struct i2c_device_id *id)
{
	struct device *dev = &client->dev;
	struct device *hwmon_dev;
	struct tmp102 *tmp102;
	unsigned int regval;
	int err;

	if (!i2c_check_functionality(client->adapter,
				     I2C_FUNC_SMBUS_WORD_DATA)) {
		dev_err(dev,
			"adapter doesn't support SMBus word transactions\n");
		return -ENODEV;
	}

	tmp102 = devm_kzalloc(dev, sizeof(*tmp102), GFP_KERNEL);
	if (!tmp102)
		return -ENOMEM;

	i2c_set_clientdata(client, tmp102);

	tmp102->regmap = devm_regmap_init_i2c(client, &tmp102_regmap_config);
	if (IS_ERR(tmp102->regmap))
		return PTR_ERR(tmp102->regmap);

	err = regmap_read(tmp102->regmap, TMP102_CONF_REG, &regval);
	if (err < 0) {
		dev_err(dev, "error reading config register\n");
		return err;
	}

	if ((regval & ~TMP102_CONFREG_MASK) !=
	    (TMP102_CONF_R0 | TMP102_CONF_R1)) {
		dev_err(dev, "unexpected config register value\n");
		return -ENODEV;
	}

	tmp102->config_orig = regval;

	err = devm_add_action_or_reset(dev, tmp102_restore_config, tmp102);
	if (err)
		return err;

	regval &= ~TMP102_CONFIG_CLEAR;
	regval |= TMP102_CONFIG_SET;

	err = regmap_write(tmp102->regmap, TMP102_CONF_REG, regval);
	if (err < 0) {
		dev_err(dev, "error writing config register\n");
		return err;
	}

	tmp102->ready_time = jiffies;
	if (tmp102->config_orig & TMP102_CONF_SD) {
		/*
		 * Mark that we are not ready with data until the first
		 * conversion is complete
		 */
		tmp102->ready_time += msecs_to_jiffies(CONVERSION_TIME_MS);
	}

	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
							   tmp102,
							   tmp102_groups);
	if (IS_ERR(hwmon_dev)) {
		dev_dbg(dev, "unable to register hwmon device\n");
		return PTR_ERR(hwmon_dev);
	}
	devm_thermal_zone_of_sensor_register(hwmon_dev, 0, hwmon_dev,
					     &tmp102_of_thermal_ops);

	dev_info(dev, "initialized\n");

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int tmp102_suspend(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct tmp102 *tmp102 = i2c_get_clientdata(client);

	return regmap_update_bits(tmp102->regmap, TMP102_CONF_REG,
				  TMP102_CONF_SD, TMP102_CONF_SD);
}

static int tmp102_resume(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct tmp102 *tmp102 = i2c_get_clientdata(client);
	int err;

	err = regmap_update_bits(tmp102->regmap, TMP102_CONF_REG,
				 TMP102_CONF_SD, 0);

	tmp102->ready_time = jiffies + msecs_to_jiffies(CONVERSION_TIME_MS);

	return err;
}
#endif /* CONFIG_PM */

static SIMPLE_DEV_PM_OPS(tmp102_dev_pm_ops, tmp102_suspend, tmp102_resume);

static const struct i2c_device_id tmp102_id[] = {
	{ "tmp102", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, tmp102_id);

static struct i2c_driver tmp102_driver = {
	.driver.name	= DRIVER_NAME,
	.driver.pm	= &tmp102_dev_pm_ops,
	.probe		= tmp102_probe,
	.id_table	= tmp102_id,
};

module_i2c_driver(tmp102_driver);

MODULE_AUTHOR("Steven King <sfking@fdwdc.com>");
MODULE_DESCRIPTION("Texas Instruments TMP102 temperature sensor driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
cff37c9e	1	/* Texas Instruments TMP102 SMBus temperature sensor driver
beb1b6bb	2	*
cff37c9e	3	* Copyright (C) 2010 Steven King <sfking@fdwdc.com>
beb1b6bb SK	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
beb1b6bb SK	14	*/
beb1b6bb SK	15
3d8f7a89	16	#include <linux/delay.h>
beb1b6bb SK	17	#include <linux/module.h>
	18	#include <linux/init.h>
	19	#include <linux/slab.h>
	20	#include <linux/i2c.h>
	21	#include <linux/hwmon.h>
	22	#include <linux/hwmon-sysfs.h>
	23	#include <linux/err.h>
	24	#include <linux/mutex.h>
cff37c9e	25	#include <linux/device.h>
dcd8f392	26	#include <linux/jiffies.h>
28a340db	27	#include <linux/regmap.h>
6a027523 EV	28	#include <linux/thermal.h>
6a027523 EV	29	#include <linux/of.h>
beb1b6bb SK	30
	31	#define DRIVER_NAME "tmp102"
	32
	33	#define TMP102_TEMP_REG 0x00
	34	#define TMP102_CONF_REG 0x01
	35	/* note: these bit definitions are byte swapped */
	36	#define TMP102_CONF_SD 0x0100
	37	#define TMP102_CONF_TM 0x0200
	38	#define TMP102_CONF_POL 0x0400
	39	#define TMP102_CONF_F0 0x0800
	40	#define TMP102_CONF_F1 0x1000
	41	#define TMP102_CONF_R0 0x2000
	42	#define TMP102_CONF_R1 0x4000
	43	#define TMP102_CONF_OS 0x8000
	44	#define TMP102_CONF_EM 0x0010
	45	#define TMP102_CONF_AL 0x0020
	46	#define TMP102_CONF_CR0 0x0040
	47	#define TMP102_CONF_CR1 0x0080
	48	#define TMP102_TLOW_REG 0x02
	49	#define TMP102_THIGH_REG 0x03
	50
a9f92ccf GR	51	#define TMP102_CONFREG_MASK (TMP102_CONF_SD \| TMP102_CONF_TM \| \
	52	TMP102_CONF_POL \| TMP102_CONF_F0 \| \
	53	TMP102_CONF_F1 \| TMP102_CONF_OS \| \
	54	TMP102_CONF_EM \| TMP102_CONF_AL \| \
	55	TMP102_CONF_CR0 \| TMP102_CONF_CR1)
	56
	57	#define TMP102_CONFIG_CLEAR (TMP102_CONF_SD \| TMP102_CONF_OS \| \
	58	TMP102_CONF_CR0)
	59	#define TMP102_CONFIG_SET (TMP102_CONF_TM \| TMP102_CONF_EM \| \
	60	TMP102_CONF_CR1)
	61
3d8f7a89 GR	62	#define CONVERSION_TIME_MS 35 /* in milli-seconds */
3d8f7a89 GR	63
beb1b6bb	64	struct tmp102 {
28a340db	65	struct regmap *regmap;
38806bda	66	u16 config_orig;
3d8f7a89	67	unsigned long ready_time;
beb1b6bb SK	68	};
beb1b6bb SK	69
cff37c9e JD	70	/* convert left adjusted 13-bit TMP102 register value to milliCelsius */
cff37c9e JD	71	static inline int tmp102_reg_to_mC(s16 val)
beb1b6bb	72	{
cff37c9e	73	return ((val & ~0x01) * 1000) / 128;
beb1b6bb SK	74	}
beb1b6bb SK	75
cff37c9e JD	76	/* convert milliCelsius to left adjusted 13-bit TMP102 register value */
cff37c9e JD	77	static inline u16 tmp102_mC_to_reg(int val)
beb1b6bb SK	78	{
	79	return (val * 128) / 1000;
	80	}
	81
17e8351a	82	static int tmp102_read_temp(void dev, int temp)
6a027523	83	{
3d8f7a89	84	struct tmp102 *tmp102 = dev_get_drvdata(dev);
28a340db GR	85	unsigned int reg;
28a340db GR	86	int ret;
6a027523	87
3d8f7a89	88	if (time_before(jiffies, tmp102->ready_time)) {
00917b5c NM	89	dev_dbg(dev, "%s: Conversion not ready yet..\n", __func__);
	90	return -EAGAIN;
	91	}
	92
28a340db GR	93	ret = regmap_read(tmp102->regmap, TMP102_TEMP_REG, &reg);
	94	if (ret < 0)
	95	return ret;
3d8f7a89	96
28a340db	97	*temp = tmp102_reg_to_mC(reg);
6a027523 EV	98
	99	return 0;
	100	}
	101
beb1b6bb SK	102	static ssize_t tmp102_show_temp(struct device *dev,
	103	struct device_attribute *attr,
	104	char *buf)
	105	{
	106	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
3d8f7a89	107	struct tmp102 *tmp102 = dev_get_drvdata(dev);
28a340db GR	108	int regaddr = sda->index;
	109	unsigned int reg;
	110	int err;
beb1b6bb	111
28a340db GR	112	if (regaddr == TMP102_TEMP_REG &&
28a340db GR	113	time_before(jiffies, tmp102->ready_time))
00917b5c NM	114	return -EAGAIN;
00917b5c NM	115
28a340db GR	116	err = regmap_read(tmp102->regmap, regaddr, &reg);
	117	if (err < 0)
	118	return err;
3d8f7a89	119
28a340db	120	return sprintf(buf, "%d\n", tmp102_reg_to_mC(reg));
beb1b6bb SK	121	}
	122
	123	static ssize_t tmp102_set_temp(struct device *dev,
	124	struct device_attribute *attr,
	125	const char *buf, size_t count)
	126	{
	127	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
ad9beea4	128	struct tmp102 *tmp102 = dev_get_drvdata(dev);
28a340db	129	int reg = sda->index;
beb1b6bb	130	long val;
28a340db	131	int err;
beb1b6bb	132
179c4fdb	133	if (kstrtol(buf, 10, &val) < 0)
beb1b6bb	134	return -EINVAL;
2a844c14	135	val = clamp_val(val, -256000, 255000);
cff37c9e	136
28a340db GR	137	err = regmap_write(tmp102->regmap, reg, tmp102_mC_to_reg(val));
28a340db GR	138	return err ? : count;
beb1b6bb SK	139	}
beb1b6bb SK	140
28a340db GR	141	static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, tmp102_show_temp, NULL,
28a340db GR	142	TMP102_TEMP_REG);
beb1b6bb SK	143
beb1b6bb SK	144	static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR \| S_IRUGO, tmp102_show_temp,
28a340db	145	tmp102_set_temp, TMP102_TLOW_REG);
beb1b6bb SK	146
beb1b6bb SK	147	static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR \| S_IRUGO, tmp102_show_temp,
28a340db	148	tmp102_set_temp, TMP102_THIGH_REG);
beb1b6bb	149
ad9beea4	150	static struct attribute *tmp102_attrs[] = {
beb1b6bb SK	151	&sensor_dev_attr_temp1_input.dev_attr.attr,
	152	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
	153	&sensor_dev_attr_temp1_max.dev_attr.attr,
	154	NULL
	155	};
ad9beea4	156	ATTRIBUTE_GROUPS(tmp102);
beb1b6bb	157
2251aef6 EV	158	static const struct thermal_zone_of_device_ops tmp102_of_thermal_ops = {
	159	.get_temp = tmp102_read_temp,
	160	};
	161
b17ea1ca GR	162	static void tmp102_restore_config(void *data)
	163	{
	164	struct tmp102 *tmp102 = data;
b17ea1ca	165
28a340db GR	166	regmap_write(tmp102->regmap, TMP102_CONF_REG, tmp102->config_orig);
	167	}
	168
	169	static bool tmp102_is_writeable_reg(struct device *dev, unsigned int reg)
	170	{
	171	return reg != TMP102_TEMP_REG;
b17ea1ca GR	172	}
b17ea1ca GR	173
28a340db GR	174	static bool tmp102_is_volatile_reg(struct device *dev, unsigned int reg)
	175	{
	176	return reg == TMP102_TEMP_REG;
	177	}
	178
	179	static const struct regmap_config tmp102_regmap_config = {
	180	.reg_bits = 8,
	181	.val_bits = 16,
	182	.max_register = TMP102_THIGH_REG,
	183	.writeable_reg = tmp102_is_writeable_reg,
	184	.volatile_reg = tmp102_is_volatile_reg,
	185	.val_format_endian = REGMAP_ENDIAN_BIG,
	186	.cache_type = REGCACHE_RBTREE,
	187	.use_single_rw = true,
	188	};
	189
6c931ae1	190	static int tmp102_probe(struct i2c_client *client,
beb1b6bb SK	191	const struct i2c_device_id *id)
beb1b6bb SK	192	{
fbd9af16	193	struct device *dev = &client->dev;
ad9beea4	194	struct device *hwmon_dev;
beb1b6bb	195	struct tmp102 *tmp102;
28a340db GR	196	unsigned int regval;
28a340db GR	197	int err;
beb1b6bb	198
cff37c9e	199	if (!i2c_check_functionality(client->adapter,
beb1b6bb	200	I2C_FUNC_SMBUS_WORD_DATA)) {
fbd9af16	201	dev_err(dev,
b55f3757	202	"adapter doesn't support SMBus word transactions\n");
beb1b6bb SK	203	return -ENODEV;
	204	}
	205
fbd9af16	206	tmp102 = devm_kzalloc(dev, sizeof(*tmp102), GFP_KERNEL);
f511a21f	207	if (!tmp102)
beb1b6bb	208	return -ENOMEM;
f511a21f	209
beb1b6bb SK	210	i2c_set_clientdata(client, tmp102);
beb1b6bb SK	211
28a340db GR	212	tmp102->regmap = devm_regmap_init_i2c(client, &tmp102_regmap_config);
	213	if (IS_ERR(tmp102->regmap))
	214	return PTR_ERR(tmp102->regmap);
	215
	216	err = regmap_read(tmp102->regmap, TMP102_CONF_REG, &regval);
	217	if (err < 0) {
fbd9af16	218	dev_err(dev, "error reading config register\n");
28a340db	219	return err;
38806bda	220	}
a9f92ccf	221
28a340db	222	if ((regval & ~TMP102_CONFREG_MASK) !=
a9f92ccf GR	223	(TMP102_CONF_R0 \| TMP102_CONF_R1)) {
	224	dev_err(dev, "unexpected config register value\n");
	225	return -ENODEV;
	226	}
	227
28a340db	228	tmp102->config_orig = regval;
b17ea1ca	229
1aa4f028 GR	230	err = devm_add_action_or_reset(dev, tmp102_restore_config, tmp102);
	231	if (err)
	232	return err;
b17ea1ca	233
28a340db GR	234	regval &= ~TMP102_CONFIG_CLEAR;
28a340db GR	235	regval \|= TMP102_CONFIG_SET;
a9f92ccf	236
28a340db GR	237	err = regmap_write(tmp102->regmap, TMP102_CONF_REG, regval);
28a340db GR	238	if (err < 0) {
fbd9af16	239	dev_err(dev, "error writing config register\n");
28a340db	240	return err;
cff37c9e	241	}
3d8f7a89	242
3d8f7a89 GR	243	tmp102->ready_time = jiffies;
	244	if (tmp102->config_orig & TMP102_CONF_SD) {
	245	/*
	246	* Mark that we are not ready with data until the first
	247	* conversion is complete
	248	*/
	249	tmp102->ready_time += msecs_to_jiffies(CONVERSION_TIME_MS);
	250	}
	251
b17ea1ca GR	252	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
	253	tmp102,
	254	tmp102_groups);
ad9beea4	255	if (IS_ERR(hwmon_dev)) {
fbd9af16	256	dev_dbg(dev, "unable to register hwmon device\n");
b17ea1ca	257	return PTR_ERR(hwmon_dev);
beb1b6bb	258	}
51b77fd7 EV	259	devm_thermal_zone_of_sensor_register(hwmon_dev, 0, hwmon_dev,
51b77fd7 EV	260	&tmp102_of_thermal_ops);
6a027523	261
fbd9af16	262	dev_info(dev, "initialized\n");
beb1b6bb	263
beb1b6bb SK	264	return 0;
	265	}
	266
dd378b1b	267	#ifdef CONFIG_PM_SLEEP
beb1b6bb SK	268	static int tmp102_suspend(struct device *dev)
	269	{
	270	struct i2c_client *client = to_i2c_client(dev);
28a340db	271	struct tmp102 *tmp102 = i2c_get_clientdata(client);
beb1b6bb	272
28a340db GR	273	return regmap_update_bits(tmp102->regmap, TMP102_CONF_REG,
28a340db GR	274	TMP102_CONF_SD, TMP102_CONF_SD);
beb1b6bb SK	275	}
	276
	277	static int tmp102_resume(struct device *dev)
	278	{
	279	struct i2c_client *client = to_i2c_client(dev);
3d8f7a89	280	struct tmp102 *tmp102 = i2c_get_clientdata(client);
28a340db	281	int err;
beb1b6bb	282
28a340db GR	283	err = regmap_update_bits(tmp102->regmap, TMP102_CONF_REG,
28a340db GR	284	TMP102_CONF_SD, 0);
beb1b6bb	285
3d8f7a89 GR	286	tmp102->ready_time = jiffies + msecs_to_jiffies(CONVERSION_TIME_MS);
3d8f7a89 GR	287
28a340db	288	return err;
beb1b6bb	289	}
beb1b6bb SK	290	#endif /* CONFIG_PM */
beb1b6bb SK	291
dd378b1b GS	292	static SIMPLE_DEV_PM_OPS(tmp102_dev_pm_ops, tmp102_suspend, tmp102_resume);
dd378b1b GS	293
beb1b6bb	294	static const struct i2c_device_id tmp102_id[] = {
cff37c9e	295	{ "tmp102", 0 },
beb1b6bb SK	296	{ }
beb1b6bb SK	297	};
cff37c9e	298	MODULE_DEVICE_TABLE(i2c, tmp102_id);
beb1b6bb SK	299
	300	static struct i2c_driver tmp102_driver = {
	301	.driver.name = DRIVER_NAME,
dd378b1b	302	.driver.pm = &tmp102_dev_pm_ops,
beb1b6bb	303	.probe = tmp102_probe,
beb1b6bb	304	.id_table = tmp102_id,
beb1b6bb SK	305	};
beb1b6bb SK	306
f0967eea	307	module_i2c_driver(tmp102_driver);
beb1b6bb	308
beb1b6bb SK	309	MODULE_AUTHOR("Steven King <sfking@fdwdc.com>");
	310	MODULE_DESCRIPTION("Texas Instruments TMP102 temperature sensor driver");
	311	MODULE_LICENSE("GPL");