drivers/hwmon/emc1403.c - linux/torvalds/linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * emc1403.c - SMSC Thermal Driver
  *
  * Copyright (C) 2008 Intel Corp
  *
  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  *
  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  */

 #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/sysfs.h>
 #include <linux/mutex.h>
 #include <linux/regmap.h>
 #include <linux/util_macros.h>

 #define THERMAL_PID_REG		0xfd
 #define THERMAL_SMSC_ID_REG	0xfe
 #define THERMAL_REVISION_REG	0xff

 enum emc1403_chip { emc1402, emc1403, emc1404, emc1428 };

 struct thermal_data {
 	enum emc1403_chip chip;
 	struct regmap *regmap;
 	struct mutex mutex;
 };

 static ssize_t power_state_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct thermal_data *data = dev_get_drvdata(dev);
 	unsigned int val;
 	int retval;

 	retval = regmap_read(data->regmap, 0x03, &val);
 	if (retval < 0)
 		return retval;
 	return sprintf(buf, "%d\n", !!(val & BIT(6)));
 }

 static ssize_t power_state_store(struct device *dev, struct device_attribute *attr,
 				 const char *buf, size_t count)
 {
 	struct thermal_data *data = dev_get_drvdata(dev);
 	unsigned long val;
 	int retval;

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

 	retval = regmap_update_bits(data->regmap, 0x03, BIT(6),
 				    val ? BIT(6) : 0);
 	if (retval < 0)
 		return retval;
 	return count;
 }

 static DEVICE_ATTR_RW(power_state);

 static struct attribute *emc1403_attrs[] = {
 	&dev_attr_power_state.attr,
 	NULL
 };
 ATTRIBUTE_GROUPS(emc1403);

 static int emc1403_detect(struct i2c_client *client,
 			struct i2c_board_info *info)
 {
 	int id;
 	/* Check if thermal chip is SMSC and EMC1403 or EMC1423 */

 	id = i2c_smbus_read_byte_data(client, THERMAL_SMSC_ID_REG);
 	if (id != 0x5d)
 		return -ENODEV;

 	id = i2c_smbus_read_byte_data(client, THERMAL_PID_REG);
 	switch (id) {
 	case 0x20:
 		strscpy(info->type, "emc1402", I2C_NAME_SIZE);
 		break;
 	case 0x21:
 		strscpy(info->type, "emc1403", I2C_NAME_SIZE);
 		break;
 	case 0x22:
 		strscpy(info->type, "emc1422", I2C_NAME_SIZE);
 		break;
 	case 0x23:
 		strscpy(info->type, "emc1423", I2C_NAME_SIZE);
 		break;
 	case 0x25:
 		strscpy(info->type, "emc1404", I2C_NAME_SIZE);
 		break;
 	case 0x27:
 		strscpy(info->type, "emc1424", I2C_NAME_SIZE);
 		break;
 	case 0x29:
 		strscpy(info->type, "emc1428", I2C_NAME_SIZE);
 		break;
 	case 0x59:
 		strscpy(info->type, "emc1438", I2C_NAME_SIZE);
 		break;
 	case 0x60:
 		strscpy(info->type, "emc1442", I2C_NAME_SIZE);
 		break;
 	default:
 		return -ENODEV;
 	}

 	id = i2c_smbus_read_byte_data(client, THERMAL_REVISION_REG);
 	if (id < 0x01 || id > 0x04)
 		return -ENODEV;

 	return 0;
 }

 static bool emc1403_regmap_is_volatile(struct device *dev, unsigned int reg)
 {
 	switch (reg) {
 	case 0x00:	/* internal diode high byte */
 	case 0x01:	/* external diode 1 high byte */
 	case 0x02:	/* status */
 	case 0x10:	/* external diode 1 low byte */
 	case 0x1b:	/* external diode fault */
 	case 0x23:	/* external diode 2 high byte */
 	case 0x24:	/* external diode 2 low byte */
 	case 0x29:	/* internal diode low byte */
 	case 0x2a:	/* externl diode 3 high byte */
 	case 0x2b:	/* external diode 3 low byte */
 	case 0x35:	/* high limit status */
 	case 0x36:	/* low limit status */
 	case 0x37:	/* therm limit status */
 	case 0x41:	/* external diode 4 high byte */
 	case 0x42:	/* external diode 4 low byte */
 	case 0x43:	/* external diode 5 high byte */
 	case 0x44:	/* external diode 5 low byte */
 	case 0x45:	/* external diode 6 high byte */
 	case 0x46:	/* external diode 6 low byte */
 	case 0x47:	/* external diode 7 high byte */
 	case 0x48:	/* external diode 7 low byte */
 		return true;
 	default:
 		return false;
 	}
 }

 static const struct regmap_config emc1403_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
 	.cache_type = REGCACHE_MAPLE,
 	.volatile_reg = emc1403_regmap_is_volatile,
 };

 enum emc1403_reg_map {temp_min, temp_max, temp_crit, temp_input};

 static u8 ema1403_temp_map[] = {
 	[hwmon_temp_min] = temp_min,
 	[hwmon_temp_max] = temp_max,
 	[hwmon_temp_crit] = temp_crit,
 	[hwmon_temp_input] = temp_input,
 };

 static u8 emc1403_temp_regs[][4] = {
 	[0] = {
 		[temp_min] = 0x06,
 		[temp_max] = 0x05,
 		[temp_crit] = 0x20,
 		[temp_input] = 0x00,
 	},
 	[1] = {
 		[temp_min] = 0x08,
 		[temp_max] = 0x07,
 		[temp_crit] = 0x19,
 		[temp_input] = 0x01,
 	},
 	[2] = {
 		[temp_min] = 0x16,
 		[temp_max] = 0x15,
 		[temp_crit] = 0x1a,
 		[temp_input] = 0x23,
 	},
 	[3] = {
 		[temp_min] = 0x2d,
 		[temp_max] = 0x2c,
 		[temp_crit] = 0x30,
 		[temp_input] = 0x2a,
 	},
 	[4] = {
 		[temp_min] = 0x51,
 		[temp_max] = 0x50,
 		[temp_crit] = 0x64,
 		[temp_input] = 0x41,
 	},
 	[5] = {
 		[temp_min] = 0x55,
 		[temp_max] = 0x54,
 		[temp_crit] = 0x65,
 		[temp_input] = 0x43
 	},
 	[6] = {
 		[temp_min] = 0x59,
 		[temp_max] = 0x58,
 		[temp_crit] = 0x66,
 		[temp_input] = 0x45,
 	},
 	[7] = {
 		[temp_min] = 0x5d,
 		[temp_max] = 0x5c,
 		[temp_crit] = 0x67,
 		[temp_input] = 0x47,
 	},
 };

 static s8 emc1403_temp_regs_low[][4] = {
 	[0] = {
 		[temp_min] = -1,
 		[temp_max] = -1,
 		[temp_crit] = -1,
 		[temp_input] = 0x29,
 	},
 	[1] = {
 		[temp_min] = 0x14,
 		[temp_max] = 0x13,
 		[temp_crit] = -1,
 		[temp_input] = 0x10,
 	},
 	[2] = {
 		[temp_min] = 0x18,
 		[temp_max] = 0x17,
 		[temp_crit] = -1,
 		[temp_input] = 0x24,
 	},
 	[3] = {
 		[temp_min] = 0x2f,
 		[temp_max] = 0x2e,
 		[temp_crit] = -1,
 		[temp_input] = 0x2b,
 	},
 	[4] = {
 		[temp_min] = 0x53,
 		[temp_max] = 0x52,
 		[temp_crit] = -1,
 		[temp_input] = 0x42,
 	},
 	[5] = {
 		[temp_min] = 0x57,
 		[temp_max] = 0x56,
 		[temp_crit] = -1,
 		[temp_input] = 0x44,
 	},
 	[6] = {
 		[temp_min] = 0x5b,
 		[temp_max] = 0x5a,
 		[temp_crit] = -1,
 		[temp_input] = 0x46,
 	},
 	[7] = {
 		[temp_min] = 0x5f,
 		[temp_max] = 0x5e,
 		[temp_crit] = -1,
 		[temp_input] = 0x48,
 	},
 };

 static int __emc1403_get_temp(struct thermal_data *data, int channel,
 			      enum emc1403_reg_map map, long *val)
 {
 	unsigned int regvalh;
 	unsigned int regvall = 0;
 	int ret;
 	s8 reg;

 	ret = regmap_read(data->regmap, emc1403_temp_regs[channel][map], &regvalh);
 	if (ret < 0)
 		return ret;

 	reg = emc1403_temp_regs_low[channel][map];
 	if (reg >= 0) {
 		ret = regmap_read(data->regmap, reg, &regvall);
 		if (ret < 0)
 			return ret;
 	}

 	if (data->chip == emc1428)
 		*val = sign_extend32((regvalh << 3) | (regvall >> 5), 10) * 125;
 	else
 		*val = ((regvalh << 3) | (regvall >> 5)) * 125;

 	return 0;
 }

 static int emc1403_get_temp(struct thermal_data *data, int channel,
 			    enum emc1403_reg_map map, long *val)
 {
 	int ret;

 	mutex_lock(&data->mutex);
 	ret = __emc1403_get_temp(data, channel, map, val);
 	mutex_unlock(&data->mutex);

 	return ret;
 }

 static int emc1403_get_hyst(struct thermal_data *data, int channel,
 			    enum emc1403_reg_map map, long *val)
 {
 	int hyst, ret;
 	long limit;

 	mutex_lock(&data->mutex);
 	ret = __emc1403_get_temp(data, channel, map, &limit);
 	if (ret < 0)
 		goto unlock;
 	ret = regmap_read(data->regmap, 0x21, &hyst);
 	if (ret < 0)
 		goto unlock;
 	if (map == temp_min)
 		*val = limit + hyst * 1000;
 	else
 		*val = limit - hyst * 1000;
 unlock:
 	mutex_unlock(&data->mutex);
 	return ret;
 }

 static int emc1403_temp_read(struct thermal_data *data, u32 attr, int channel, long *val)
 {
 	unsigned int regval;
 	int ret;

 	switch (attr) {
 	case hwmon_temp_min:
 	case hwmon_temp_max:
 	case hwmon_temp_crit:
 	case hwmon_temp_input:
 		ret = emc1403_get_temp(data, channel, ema1403_temp_map[attr], val);
 		break;
 	case hwmon_temp_min_hyst:
 		ret = emc1403_get_hyst(data, channel, temp_min, val);
 		break;
 	case hwmon_temp_max_hyst:
 		ret = emc1403_get_hyst(data, channel, temp_max, val);
 		break;
 	case hwmon_temp_crit_hyst:
 		ret = emc1403_get_hyst(data, channel, temp_crit, val);
 		break;
 	case hwmon_temp_min_alarm:
 		if (data->chip == emc1402) {
 			ret = regmap_read(data->regmap, 0x02, &regval);
 			if (ret < 0)
 				break;
 			*val = !!(regval & BIT(5 - 2 * channel));
 		} else {
 			ret = regmap_read(data->regmap, 0x36, &regval);
 			if (ret < 0)
 				break;
 			*val = !!(regval & BIT(channel));
 		}
 		break;
 	case hwmon_temp_max_alarm:
 		if (data->chip == emc1402) {
 			ret = regmap_read(data->regmap, 0x02, &regval);
 			if (ret < 0)
 				break;
 			*val = !!(regval & BIT(6 - 2 * channel));
 		} else {
 			ret = regmap_read(data->regmap, 0x35, &regval);
 			if (ret < 0)
 				break;
 			*val = !!(regval & BIT(channel));
 		}
 		break;
 	case hwmon_temp_crit_alarm:
 		if (data->chip == emc1402) {
 			ret = regmap_read(data->regmap, 0x02, &regval);
 			if (ret < 0)
 				break;
 			*val = !!(regval & BIT(channel));
 		} else {
 			ret = regmap_read(data->regmap, 0x37, &regval);
 			if (ret < 0)
 				break;
 			*val = !!(regval & BIT(channel));
 		}
 		break;
 	case hwmon_temp_fault:
 		ret = regmap_read(data->regmap, 0x1b, &regval);
 		if (ret < 0)
 			break;
 		*val = !!(regval & BIT(channel));
 		break;
 	default:
 		return -EOPNOTSUPP;
 	}
 	return ret;
 }

 static int emc1403_get_convrate(struct thermal_data *data, long *val)
 {
 	unsigned int convrate;
 	int ret;

 	ret = regmap_read(data->regmap, 0x04, &convrate);
 	if (ret < 0)
 		return ret;
 	if (convrate > 10)
 		convrate = 4;

 	*val = 16000 >> convrate;
 	return 0;
 }

 static int emc1403_chip_read(struct thermal_data *data, u32 attr, long *val)
 {
 	switch (attr) {
 	case hwmon_chip_update_interval:
 		return emc1403_get_convrate(data, val);
 	default:
 		return -EOPNOTSUPP;
 	}
 }

 static int emc1403_read(struct device *dev, enum hwmon_sensor_types type,
 			u32 attr, int channel, long *val)
 {
 	struct thermal_data *data = dev_get_drvdata(dev);

 	switch (type) {
 	case hwmon_temp:
 		return emc1403_temp_read(data, attr, channel, val);
 	case hwmon_chip:
 		return emc1403_chip_read(data, attr, val);
 	default:
 		return -EOPNOTSUPP;
 	}
 }

 static int emc1403_set_hyst(struct thermal_data *data, long val)
 {
 	int hyst, ret;
 	long limit;

 	if (data->chip == emc1428)
 		val = clamp_val(val, -128000, 127000);
 	else
 		val = clamp_val(val, 0, 255000);

 	mutex_lock(&data->mutex);
 	ret = __emc1403_get_temp(data, 0, temp_crit, &limit);
 	if (ret < 0)
 		goto unlock;

 	hyst = limit - val;
 	if (data->chip == emc1428)
 		hyst = clamp_val(DIV_ROUND_CLOSEST(hyst, 1000), 0, 127);
 	else
 		hyst = clamp_val(DIV_ROUND_CLOSEST(hyst, 1000), 0, 255);
 	ret = regmap_write(data->regmap, 0x21, hyst);
 unlock:
 	mutex_unlock(&data->mutex);
 	return ret;
 }

 static int emc1403_set_temp(struct thermal_data *data, int channel,
 			    enum emc1403_reg_map map, long val)
 {
 	unsigned int regval;
 	int ret;
 	u8 regh;
 	s8 regl;

 	regh = emc1403_temp_regs[channel][map];
 	regl = emc1403_temp_regs_low[channel][map];

 	mutex_lock(&data->mutex);
 	if (regl >= 0) {
 		if (data->chip == emc1428)
 			val = clamp_val(val, -128000, 127875);
 		else
 			val = clamp_val(val, 0, 255875);
 		regval = DIV_ROUND_CLOSEST(val, 125);
 		ret = regmap_write(data->regmap, regh, (regval >> 3) & 0xff);
 		if (ret < 0)
 			goto unlock;
 		ret = regmap_write(data->regmap, regl, (regval & 0x07) << 5);
 	} else {
 		if (data->chip == emc1428)
 			val = clamp_val(val, -128000, 127000);
 		else
 			val = clamp_val(val, 0, 255000);
 		regval = DIV_ROUND_CLOSEST(val, 1000);
 		ret = regmap_write(data->regmap, regh, regval);
 	}
 unlock:
 	mutex_unlock(&data->mutex);
 	return ret;
 }

 static int emc1403_temp_write(struct thermal_data *data, u32 attr, int channel, long val)
 {
 	switch (attr) {
 	case hwmon_temp_min:
 	case hwmon_temp_max:
 	case hwmon_temp_crit:
 		return emc1403_set_temp(data, channel, ema1403_temp_map[attr], val);
 	case hwmon_temp_crit_hyst:
 		return emc1403_set_hyst(data, val);
 	default:
 		return -EOPNOTSUPP;
 	}
 }

 /* Lookup table for temperature conversion times in msec */
 static const u16 ina3221_conv_time[] = {
 	16000, 8000, 4000, 2000, 1000, 500, 250, 125, 62, 31, 16
 };

 static int emc1403_set_convrate(struct thermal_data *data, unsigned int interval)
 {
 	int convrate;

 	convrate = find_closest_descending(interval, ina3221_conv_time,
 					   ARRAY_SIZE(ina3221_conv_time));
 	return regmap_write(data->regmap, 0x04, convrate);
 }

 static int emc1403_chip_write(struct thermal_data *data, u32 attr, long val)
 {
 	switch (attr) {
 	case hwmon_chip_update_interval:
 		return emc1403_set_convrate(data, clamp_val(val, 0, 100000));
 	default:
 		return -EOPNOTSUPP;
 	}
 }

 static int emc1403_write(struct device *dev, enum hwmon_sensor_types type,
 			 u32 attr, int channel, long val)
 {
 	struct thermal_data *data = dev_get_drvdata(dev);

 	switch (type) {
 	case hwmon_temp:
 		return emc1403_temp_write(data, attr, channel, val);
 	case hwmon_chip:
 		return emc1403_chip_write(data, attr, val);
 	default:
 		return -EOPNOTSUPP;
 	}
 }

 static umode_t emc1403_temp_is_visible(const void *_data, u32 attr, int channel)
 {
 	const struct thermal_data *data = _data;

 	if (data->chip == emc1402 && channel > 1)
 		return 0;
 	if (data->chip == emc1403 && channel > 2)
 		return 0;
 	if (data->chip != emc1428 && channel > 3)
 		return 0;

 	switch (attr) {
 	case hwmon_temp_input:
 	case hwmon_temp_min_alarm:
 	case hwmon_temp_max_alarm:
 	case hwmon_temp_crit_alarm:
 	case hwmon_temp_fault:
 	case hwmon_temp_min_hyst:
 	case hwmon_temp_max_hyst:
 		return 0444;
 	case hwmon_temp_min:
 	case hwmon_temp_max:
 	case hwmon_temp_crit:
 		return 0644;
 	case hwmon_temp_crit_hyst:
 		if (channel == 0)
 			return 0644;
 		return 0444;
 	default:
 		return 0;
 	}
 }

 static umode_t emc1403_chip_is_visible(const void *_data, u32 attr)
 {
 	switch (attr) {
 	case hwmon_chip_update_interval:
 		return 0644;
 	default:
 		return 0;
 	}
 }

 static umode_t emc1403_is_visible(const void *data, enum hwmon_sensor_types type,
 				  u32 attr, int channel)
 {
 	switch (type) {
 	case hwmon_temp:
 		return emc1403_temp_is_visible(data, attr, channel);
 	case hwmon_chip:
 		return emc1403_chip_is_visible(data, attr);
 	default:
 		return 0;
 	}
 }

 static const struct hwmon_channel_info * const emc1403_info[] = {
 	HWMON_CHANNEL_INFO(chip, HWMON_C_UPDATE_INTERVAL),
 	HWMON_CHANNEL_INFO(temp,
 			   HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
 			   HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
 			   HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
 			   HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM,
 			   HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
 			   HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
 			   HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
 			   HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT,
 			   HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
 			   HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
 			   HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
 			   HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT,
 			   HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
 			   HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
 			   HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
 			   HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT,
 			   HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
 			   HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
 			   HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
 			   HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT,
 			   HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
 			   HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
 			   HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
 			   HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT,
 			   HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
 			   HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
 			   HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
 			   HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT,
 			   HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
 			   HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
 			   HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
 			   HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT
 			   ),
 	NULL
 };

 static const struct hwmon_ops emc1403_hwmon_ops = {
 	.is_visible = emc1403_is_visible,
 	.read = emc1403_read,
 	.write = emc1403_write,
 };

 static const struct hwmon_chip_info emc1403_chip_info = {
 	.ops = &emc1403_hwmon_ops,
 	.info = emc1403_info,
 };

 /* Last digit of chip name indicates number of channels */
 static const struct i2c_device_id emc1403_idtable[] = {
 	{ "emc1402", emc1402 },
 	{ "emc1403", emc1403 },
 	{ "emc1404", emc1404 },
 	{ "emc1412", emc1402 },
 	{ "emc1413", emc1403 },
 	{ "emc1414", emc1404 },
 	{ "emc1422", emc1402 },
 	{ "emc1423", emc1403 },
 	{ "emc1424", emc1404 },
 	{ "emc1428", emc1428 },
 	{ "emc1438", emc1428 },
 	{ "emc1442", emc1402 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, emc1403_idtable);

 static int emc1403_probe(struct i2c_client *client)
 {
 	struct thermal_data *data;
 	struct device *hwmon_dev;
 	const struct i2c_device_id *id = i2c_match_id(emc1403_idtable, client);

 	data = devm_kzalloc(&client->dev, sizeof(struct thermal_data),
 			    GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;

 	data->chip = id->driver_data;
 	data->regmap = devm_regmap_init_i2c(client, &emc1403_regmap_config);
 	if (IS_ERR(data->regmap))
 		return PTR_ERR(data->regmap);

 	mutex_init(&data->mutex);

 	hwmon_dev = devm_hwmon_device_register_with_info(&client->dev,
 							 client->name, data,
 							 &emc1403_chip_info,
 							 emc1403_groups);
 	return PTR_ERR_OR_ZERO(hwmon_dev);
 }

 static const unsigned short emc1403_address_list[] = {
 	0x18, 0x1c, 0x29, 0x3c, 0x4c, 0x4d, 0x5c, I2C_CLIENT_END
 };

 static struct i2c_driver sensor_emc1403 = {
 	.class = I2C_CLASS_HWMON,
 	.driver = {
 		.name = "emc1403",
 	},
 	.detect = emc1403_detect,
 	.probe = emc1403_probe,
 	.id_table = emc1403_idtable,
 	.address_list = emc1403_address_list,
 };

 module_i2c_driver(sensor_emc1403);

 MODULE_AUTHOR("Kalhan Trisal <kalhan.trisal@intel.com");
 MODULE_DESCRIPTION("emc1403 Thermal Driver");
 MODULE_LICENSE("GPL v2");
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* emc1403.c - SMSC Thermal Driver
	*
	* Copyright (C) 2008 Intel Corp
	*
	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	*
	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	*/

	#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/sysfs.h>
	#include <linux/mutex.h>
	#include <linux/regmap.h>
	#include <linux/util_macros.h>

	#define THERMAL_PID_REG 0xfd
	#define THERMAL_SMSC_ID_REG 0xfe
	#define THERMAL_REVISION_REG 0xff

	enum emc1403_chip { emc1402, emc1403, emc1404, emc1428 };

	struct thermal_data {
	enum emc1403_chip chip;
	struct regmap *regmap;
	struct mutex mutex;
	};

	static ssize_t power_state_show(struct device dev, struct device_attribute attr, char *buf)
	{
	struct thermal_data *data = dev_get_drvdata(dev);
	unsigned int val;
	int retval;

	retval = regmap_read(data->regmap, 0x03, &val);
	if (retval < 0)
	return retval;
	return sprintf(buf, "%d\n", !!(val & BIT(6)));
	}

	static ssize_t power_state_store(struct device dev, struct device_attribute attr,
	const char *buf, size_t count)
	{
	struct thermal_data *data = dev_get_drvdata(dev);
	unsigned long val;
	int retval;

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

	retval = regmap_update_bits(data->regmap, 0x03, BIT(6),
	val ? BIT(6) : 0);
	if (retval < 0)
	return retval;
	return count;
	}

	static DEVICE_ATTR_RW(power_state);

	static struct attribute *emc1403_attrs[] = {
	&dev_attr_power_state.attr,
	NULL
	};
	ATTRIBUTE_GROUPS(emc1403);

	static int emc1403_detect(struct i2c_client *client,
	struct i2c_board_info *info)
	{
	int id;
	/* Check if thermal chip is SMSC and EMC1403 or EMC1423 */

	id = i2c_smbus_read_byte_data(client, THERMAL_SMSC_ID_REG);
	if (id != 0x5d)
	return -ENODEV;

	id = i2c_smbus_read_byte_data(client, THERMAL_PID_REG);
	switch (id) {
	case 0x20:
	strscpy(info->type, "emc1402", I2C_NAME_SIZE);
	break;
	case 0x21:
	strscpy(info->type, "emc1403", I2C_NAME_SIZE);
	break;
	case 0x22:
	strscpy(info->type, "emc1422", I2C_NAME_SIZE);
	break;
	case 0x23:
	strscpy(info->type, "emc1423", I2C_NAME_SIZE);
	break;
	case 0x25:
	strscpy(info->type, "emc1404", I2C_NAME_SIZE);
	break;
	case 0x27:
	strscpy(info->type, "emc1424", I2C_NAME_SIZE);
	break;
	case 0x29:
	strscpy(info->type, "emc1428", I2C_NAME_SIZE);
	break;
	case 0x59:
	strscpy(info->type, "emc1438", I2C_NAME_SIZE);
	break;
	case 0x60:
	strscpy(info->type, "emc1442", I2C_NAME_SIZE);
	break;
	default:
	return -ENODEV;
	}

	id = i2c_smbus_read_byte_data(client, THERMAL_REVISION_REG);
	if (id < 0x01 \|\| id > 0x04)
	return -ENODEV;

	return 0;
	}

	static bool emc1403_regmap_is_volatile(struct device *dev, unsigned int reg)
	{
	switch (reg) {
	case 0x00: /* internal diode high byte */
	case 0x01: /* external diode 1 high byte */
	case 0x02: /* status */
	case 0x10: /* external diode 1 low byte */
	case 0x1b: /* external diode fault */
	case 0x23: /* external diode 2 high byte */
	case 0x24: /* external diode 2 low byte */
	case 0x29: /* internal diode low byte */
	case 0x2a: /* externl diode 3 high byte */
	case 0x2b: /* external diode 3 low byte */
	case 0x35: /* high limit status */
	case 0x36: /* low limit status */
	case 0x37: /* therm limit status */
	case 0x41: /* external diode 4 high byte */
	case 0x42: /* external diode 4 low byte */
	case 0x43: /* external diode 5 high byte */
	case 0x44: /* external diode 5 low byte */
	case 0x45: /* external diode 6 high byte */
	case 0x46: /* external diode 6 low byte */
	case 0x47: /* external diode 7 high byte */
	case 0x48: /* external diode 7 low byte */
	return true;
	default:
	return false;
	}
	}

	static const struct regmap_config emc1403_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.cache_type = REGCACHE_MAPLE,
	.volatile_reg = emc1403_regmap_is_volatile,
	};

	enum emc1403_reg_map {temp_min, temp_max, temp_crit, temp_input};

	static u8 ema1403_temp_map[] = {
	[hwmon_temp_min] = temp_min,
	[hwmon_temp_max] = temp_max,
	[hwmon_temp_crit] = temp_crit,
	[hwmon_temp_input] = temp_input,
	};

	static u8 emc1403_temp_regs[][4] = {
	[0] = {
	[temp_min] = 0x06,
	[temp_max] = 0x05,
	[temp_crit] = 0x20,
	[temp_input] = 0x00,
	},
	[1] = {
	[temp_min] = 0x08,
	[temp_max] = 0x07,
	[temp_crit] = 0x19,
	[temp_input] = 0x01,
	},
	[2] = {
	[temp_min] = 0x16,
	[temp_max] = 0x15,
	[temp_crit] = 0x1a,
	[temp_input] = 0x23,
	},
	[3] = {
	[temp_min] = 0x2d,
	[temp_max] = 0x2c,
	[temp_crit] = 0x30,
	[temp_input] = 0x2a,
	},
	[4] = {
	[temp_min] = 0x51,
	[temp_max] = 0x50,
	[temp_crit] = 0x64,
	[temp_input] = 0x41,
	},
	[5] = {
	[temp_min] = 0x55,
	[temp_max] = 0x54,
	[temp_crit] = 0x65,
	[temp_input] = 0x43
	},
	[6] = {
	[temp_min] = 0x59,
	[temp_max] = 0x58,
	[temp_crit] = 0x66,
	[temp_input] = 0x45,
	},
	[7] = {
	[temp_min] = 0x5d,
	[temp_max] = 0x5c,
	[temp_crit] = 0x67,
	[temp_input] = 0x47,
	},
	};

	static s8 emc1403_temp_regs_low[][4] = {
	[0] = {
	[temp_min] = -1,
	[temp_max] = -1,
	[temp_crit] = -1,
	[temp_input] = 0x29,
	},
	[1] = {
	[temp_min] = 0x14,
	[temp_max] = 0x13,
	[temp_crit] = -1,
	[temp_input] = 0x10,
	},
	[2] = {
	[temp_min] = 0x18,
	[temp_max] = 0x17,
	[temp_crit] = -1,
	[temp_input] = 0x24,
	},
	[3] = {
	[temp_min] = 0x2f,
	[temp_max] = 0x2e,
	[temp_crit] = -1,
	[temp_input] = 0x2b,
	},
	[4] = {
	[temp_min] = 0x53,
	[temp_max] = 0x52,
	[temp_crit] = -1,
	[temp_input] = 0x42,
	},
	[5] = {
	[temp_min] = 0x57,
	[temp_max] = 0x56,
	[temp_crit] = -1,
	[temp_input] = 0x44,
	},
	[6] = {
	[temp_min] = 0x5b,
	[temp_max] = 0x5a,
	[temp_crit] = -1,
	[temp_input] = 0x46,
	},
	[7] = {
	[temp_min] = 0x5f,
	[temp_max] = 0x5e,
	[temp_crit] = -1,
	[temp_input] = 0x48,
	},
	};

	static int __emc1403_get_temp(struct thermal_data *data, int channel,
	enum emc1403_reg_map map, long *val)
	{
	unsigned int regvalh;
	unsigned int regvall = 0;
	int ret;
	s8 reg;

	ret = regmap_read(data->regmap, emc1403_temp_regs[channel][map], &regvalh);
	if (ret < 0)
	return ret;

	reg = emc1403_temp_regs_low[channel][map];
	if (reg >= 0) {
	ret = regmap_read(data->regmap, reg, &regvall);
	if (ret < 0)
	return ret;
	}

	if (data->chip == emc1428)
	val = sign_extend32((regvalh << 3) \| (regvall >> 5), 10) 125;
	else
	val = ((regvalh << 3) \| (regvall >> 5)) 125;

	return 0;
	}

	static int emc1403_get_temp(struct thermal_data *data, int channel,
	enum emc1403_reg_map map, long *val)
	{
	int ret;

	mutex_lock(&data->mutex);
	ret = __emc1403_get_temp(data, channel, map, val);
	mutex_unlock(&data->mutex);

	return ret;
	}

	static int emc1403_get_hyst(struct thermal_data *data, int channel,
	enum emc1403_reg_map map, long *val)
	{
	int hyst, ret;
	long limit;

	mutex_lock(&data->mutex);
	ret = __emc1403_get_temp(data, channel, map, &limit);
	if (ret < 0)
	goto unlock;
	ret = regmap_read(data->regmap, 0x21, &hyst);
	if (ret < 0)
	goto unlock;
	if (map == temp_min)
	val = limit + hyst 1000;
	else
	val = limit - hyst 1000;
	unlock:
	mutex_unlock(&data->mutex);
	return ret;
	}

	static int emc1403_temp_read(struct thermal_data data, u32 attr, int channel, long val)
	{
	unsigned int regval;
	int ret;

	switch (attr) {
	case hwmon_temp_min:
	case hwmon_temp_max:
	case hwmon_temp_crit:
	case hwmon_temp_input:
	ret = emc1403_get_temp(data, channel, ema1403_temp_map[attr], val);
	break;
	case hwmon_temp_min_hyst:
	ret = emc1403_get_hyst(data, channel, temp_min, val);
	break;
	case hwmon_temp_max_hyst:
	ret = emc1403_get_hyst(data, channel, temp_max, val);
	break;
	case hwmon_temp_crit_hyst:
	ret = emc1403_get_hyst(data, channel, temp_crit, val);
	break;
	case hwmon_temp_min_alarm:
	if (data->chip == emc1402) {
	ret = regmap_read(data->regmap, 0x02, &regval);
	if (ret < 0)
	break;
	val = !!(regval & BIT(5 - 2 channel));
	} else {
	ret = regmap_read(data->regmap, 0x36, &regval);
	if (ret < 0)
	break;
	*val = !!(regval & BIT(channel));
	}
	break;
	case hwmon_temp_max_alarm:
	if (data->chip == emc1402) {
	ret = regmap_read(data->regmap, 0x02, &regval);
	if (ret < 0)
	break;
	val = !!(regval & BIT(6 - 2 channel));
	} else {
	ret = regmap_read(data->regmap, 0x35, &regval);
	if (ret < 0)
	break;
	*val = !!(regval & BIT(channel));
	}
	break;
	case hwmon_temp_crit_alarm:
	if (data->chip == emc1402) {
	ret = regmap_read(data->regmap, 0x02, &regval);
	if (ret < 0)
	break;
	*val = !!(regval & BIT(channel));
	} else {
	ret = regmap_read(data->regmap, 0x37, &regval);
	if (ret < 0)
	break;
	*val = !!(regval & BIT(channel));
	}
	break;
	case hwmon_temp_fault:
	ret = regmap_read(data->regmap, 0x1b, &regval);
	if (ret < 0)
	break;
	*val = !!(regval & BIT(channel));
	break;
	default:
	return -EOPNOTSUPP;
	}
	return ret;
	}

	static int emc1403_get_convrate(struct thermal_data data, long val)
	{
	unsigned int convrate;
	int ret;

	ret = regmap_read(data->regmap, 0x04, &convrate);
	if (ret < 0)
	return ret;
	if (convrate > 10)
	convrate = 4;

	*val = 16000 >> convrate;
	return 0;
	}

	static int emc1403_chip_read(struct thermal_data data, u32 attr, long val)
	{
	switch (attr) {
	case hwmon_chip_update_interval:
	return emc1403_get_convrate(data, val);
	default:
	return -EOPNOTSUPP;
	}
	}

	static int emc1403_read(struct device *dev, enum hwmon_sensor_types type,
	u32 attr, int channel, long *val)
	{
	struct thermal_data *data = dev_get_drvdata(dev);

	switch (type) {
	case hwmon_temp:
	return emc1403_temp_read(data, attr, channel, val);
	case hwmon_chip:
	return emc1403_chip_read(data, attr, val);
	default:
	return -EOPNOTSUPP;
	}
	}

	static int emc1403_set_hyst(struct thermal_data *data, long val)
	{
	int hyst, ret;
	long limit;

	if (data->chip == emc1428)
	val = clamp_val(val, -128000, 127000);
	else
	val = clamp_val(val, 0, 255000);

	mutex_lock(&data->mutex);
	ret = __emc1403_get_temp(data, 0, temp_crit, &limit);
	if (ret < 0)
	goto unlock;

	hyst = limit - val;
	if (data->chip == emc1428)
	hyst = clamp_val(DIV_ROUND_CLOSEST(hyst, 1000), 0, 127);
	else
	hyst = clamp_val(DIV_ROUND_CLOSEST(hyst, 1000), 0, 255);
	ret = regmap_write(data->regmap, 0x21, hyst);
	unlock:
	mutex_unlock(&data->mutex);
	return ret;
	}

	static int emc1403_set_temp(struct thermal_data *data, int channel,
	enum emc1403_reg_map map, long val)
	{
	unsigned int regval;
	int ret;
	u8 regh;
	s8 regl;

	regh = emc1403_temp_regs[channel][map];
	regl = emc1403_temp_regs_low[channel][map];

	mutex_lock(&data->mutex);
	if (regl >= 0) {
	if (data->chip == emc1428)
	val = clamp_val(val, -128000, 127875);
	else
	val = clamp_val(val, 0, 255875);
	regval = DIV_ROUND_CLOSEST(val, 125);
	ret = regmap_write(data->regmap, regh, (regval >> 3) & 0xff);
	if (ret < 0)
	goto unlock;
	ret = regmap_write(data->regmap, regl, (regval & 0x07) << 5);
	} else {
	if (data->chip == emc1428)
	val = clamp_val(val, -128000, 127000);
	else
	val = clamp_val(val, 0, 255000);
	regval = DIV_ROUND_CLOSEST(val, 1000);
	ret = regmap_write(data->regmap, regh, regval);
	}
	unlock:
	mutex_unlock(&data->mutex);
	return ret;
	}

	static int emc1403_temp_write(struct thermal_data *data, u32 attr, int channel, long val)
	{
	switch (attr) {
	case hwmon_temp_min:
	case hwmon_temp_max:
	case hwmon_temp_crit:
	return emc1403_set_temp(data, channel, ema1403_temp_map[attr], val);
	case hwmon_temp_crit_hyst:
	return emc1403_set_hyst(data, val);
	default:
	return -EOPNOTSUPP;
	}
	}

	/* Lookup table for temperature conversion times in msec */
	static const u16 ina3221_conv_time[] = {
	16000, 8000, 4000, 2000, 1000, 500, 250, 125, 62, 31, 16
	};

	static int emc1403_set_convrate(struct thermal_data *data, unsigned int interval)
	{
	int convrate;

	convrate = find_closest_descending(interval, ina3221_conv_time,
	ARRAY_SIZE(ina3221_conv_time));
	return regmap_write(data->regmap, 0x04, convrate);
	}

	static int emc1403_chip_write(struct thermal_data *data, u32 attr, long val)
	{
	switch (attr) {
	case hwmon_chip_update_interval:
	return emc1403_set_convrate(data, clamp_val(val, 0, 100000));
	default:
	return -EOPNOTSUPP;
	}
	}

	static int emc1403_write(struct device *dev, enum hwmon_sensor_types type,
	u32 attr, int channel, long val)
	{
	struct thermal_data *data = dev_get_drvdata(dev);

	switch (type) {
	case hwmon_temp:
	return emc1403_temp_write(data, attr, channel, val);
	case hwmon_chip:
	return emc1403_chip_write(data, attr, val);
	default:
	return -EOPNOTSUPP;
	}
	}

	static umode_t emc1403_temp_is_visible(const void *_data, u32 attr, int channel)
	{
	const struct thermal_data *data = _data;

	if (data->chip == emc1402 && channel > 1)
	return 0;
	if (data->chip == emc1403 && channel > 2)
	return 0;
	if (data->chip != emc1428 && channel > 3)
	return 0;

	switch (attr) {
	case hwmon_temp_input:
	case hwmon_temp_min_alarm:
	case hwmon_temp_max_alarm:
	case hwmon_temp_crit_alarm:
	case hwmon_temp_fault:
	case hwmon_temp_min_hyst:
	case hwmon_temp_max_hyst:
	return 0444;
	case hwmon_temp_min:
	case hwmon_temp_max:
	case hwmon_temp_crit:
	return 0644;
	case hwmon_temp_crit_hyst:
	if (channel == 0)
	return 0644;
	return 0444;
	default:
	return 0;
	}
	}

	static umode_t emc1403_chip_is_visible(const void *_data, u32 attr)
	{
	switch (attr) {
	case hwmon_chip_update_interval:
	return 0644;
	default:
	return 0;
	}
	}

	static umode_t emc1403_is_visible(const void *data, enum hwmon_sensor_types type,
	u32 attr, int channel)
	{
	switch (type) {
	case hwmon_temp:
	return emc1403_temp_is_visible(data, attr, channel);
	case hwmon_chip:
	return emc1403_chip_is_visible(data, attr);
	default:
	return 0;
	}
	}

	static const struct hwmon_channel_info * const emc1403_info[] = {
	HWMON_CHANNEL_INFO(chip, HWMON_C_UPDATE_INTERVAL),
	HWMON_CHANNEL_INFO(temp,
	HWMON_T_INPUT \| HWMON_T_MIN \| HWMON_T_MAX \|
	HWMON_T_CRIT \| HWMON_T_MIN_HYST \| HWMON_T_MAX_HYST \|
	HWMON_T_CRIT_HYST \| HWMON_T_MIN_ALARM \|
	HWMON_T_MAX_ALARM \| HWMON_T_CRIT_ALARM,
	HWMON_T_INPUT \| HWMON_T_MIN \| HWMON_T_MAX \|
	HWMON_T_CRIT \| HWMON_T_MIN_HYST \| HWMON_T_MAX_HYST \|
	HWMON_T_CRIT_HYST \| HWMON_T_MIN_ALARM \|
	HWMON_T_MAX_ALARM \| HWMON_T_CRIT_ALARM \| HWMON_T_FAULT,
	HWMON_T_INPUT \| HWMON_T_MIN \| HWMON_T_MAX \|
	HWMON_T_CRIT \| HWMON_T_MIN_HYST \| HWMON_T_MAX_HYST \|
	HWMON_T_CRIT_HYST \| HWMON_T_MIN_ALARM \|
	HWMON_T_MAX_ALARM \| HWMON_T_CRIT_ALARM \| HWMON_T_FAULT,
	HWMON_T_INPUT \| HWMON_T_MIN \| HWMON_T_MAX \|
	HWMON_T_CRIT \| HWMON_T_MIN_HYST \| HWMON_T_MAX_HYST \|
	HWMON_T_CRIT_HYST \| HWMON_T_MIN_ALARM \|
	HWMON_T_MAX_ALARM \| HWMON_T_CRIT_ALARM \| HWMON_T_FAULT,
	HWMON_T_INPUT \| HWMON_T_MIN \| HWMON_T_MAX \|
	HWMON_T_CRIT \| HWMON_T_MIN_HYST \| HWMON_T_MAX_HYST \|
	HWMON_T_CRIT_HYST \| HWMON_T_MIN_ALARM \|
	HWMON_T_MAX_ALARM \| HWMON_T_CRIT_ALARM \| HWMON_T_FAULT,
	HWMON_T_INPUT \| HWMON_T_MIN \| HWMON_T_MAX \|
	HWMON_T_CRIT \| HWMON_T_MIN_HYST \| HWMON_T_MAX_HYST \|
	HWMON_T_CRIT_HYST \| HWMON_T_MIN_ALARM \|
	HWMON_T_MAX_ALARM \| HWMON_T_CRIT_ALARM \| HWMON_T_FAULT,
	HWMON_T_INPUT \| HWMON_T_MIN \| HWMON_T_MAX \|
	HWMON_T_CRIT \| HWMON_T_MIN_HYST \| HWMON_T_MAX_HYST \|
	HWMON_T_CRIT_HYST \| HWMON_T_MIN_ALARM \|
	HWMON_T_MAX_ALARM \| HWMON_T_CRIT_ALARM \| HWMON_T_FAULT,
	HWMON_T_INPUT \| HWMON_T_MIN \| HWMON_T_MAX \|
	HWMON_T_CRIT \| HWMON_T_MIN_HYST \| HWMON_T_MAX_HYST \|
	HWMON_T_CRIT_HYST \| HWMON_T_MIN_ALARM \|
	HWMON_T_MAX_ALARM \| HWMON_T_CRIT_ALARM \| HWMON_T_FAULT
	),
	NULL
	};

	static const struct hwmon_ops emc1403_hwmon_ops = {
	.is_visible = emc1403_is_visible,
	.read = emc1403_read,
	.write = emc1403_write,
	};

	static const struct hwmon_chip_info emc1403_chip_info = {
	.ops = &emc1403_hwmon_ops,
	.info = emc1403_info,
	};

	/* Last digit of chip name indicates number of channels */
	static const struct i2c_device_id emc1403_idtable[] = {
	{ "emc1402", emc1402 },
	{ "emc1403", emc1403 },
	{ "emc1404", emc1404 },
	{ "emc1412", emc1402 },
	{ "emc1413", emc1403 },
	{ "emc1414", emc1404 },
	{ "emc1422", emc1402 },
	{ "emc1423", emc1403 },
	{ "emc1424", emc1404 },
	{ "emc1428", emc1428 },
	{ "emc1438", emc1428 },
	{ "emc1442", emc1402 },
	{ }
	};
	MODULE_DEVICE_TABLE(i2c, emc1403_idtable);

	static int emc1403_probe(struct i2c_client *client)
	{
	struct thermal_data *data;
	struct device *hwmon_dev;
	const struct i2c_device_id *id = i2c_match_id(emc1403_idtable, client);

	data = devm_kzalloc(&client->dev, sizeof(struct thermal_data),
	GFP_KERNEL);
	if (!data)
	return -ENOMEM;

	data->chip = id->driver_data;
	data->regmap = devm_regmap_init_i2c(client, &emc1403_regmap_config);
	if (IS_ERR(data->regmap))
	return PTR_ERR(data->regmap);

	mutex_init(&data->mutex);

	hwmon_dev = devm_hwmon_device_register_with_info(&client->dev,
	client->name, data,
	&emc1403_chip_info,
	emc1403_groups);
	return PTR_ERR_OR_ZERO(hwmon_dev);
	}

	static const unsigned short emc1403_address_list[] = {
	0x18, 0x1c, 0x29, 0x3c, 0x4c, 0x4d, 0x5c, I2C_CLIENT_END
	};

	static struct i2c_driver sensor_emc1403 = {
	.class = I2C_CLASS_HWMON,
	.driver = {
	.name = "emc1403",
	},
	.detect = emc1403_detect,
	.probe = emc1403_probe,
	.id_table = emc1403_idtable,
	.address_list = emc1403_address_list,
	};

	module_i2c_driver(sensor_emc1403);

	MODULE_AUTHOR("Kalhan Trisal <kalhan.trisal@intel.com");
	MODULE_DESCRIPTION("emc1403 Thermal Driver");
	MODULE_LICENSE("GPL v2");