[mirror_ubuntu-bionic-kernel.git] / drivers / hwmon / emc1403.c

/*
 * emc1403.c - SMSC Thermal Driver
 *
 * Copyright (C) 2008 Intel Corp
 *
 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * 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.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 * TODO
 *	-	cache alarm and critical limit registers
 *	-	add emc1404 support
 */

#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/jiffies.h>

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

struct thermal_data {
	struct i2c_client *client;
	struct mutex mutex;
	/*
	 * Cache the hyst value so we don't keep re-reading it. In theory
	 * we could cache it forever as nobody else should be writing it.
	 */
	u8 cached_hyst;
	unsigned long hyst_valid;
};

static ssize_t show_temp(struct device *dev,
			struct device_attribute *attr, char *buf)
{
	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
	struct thermal_data *data = dev_get_drvdata(dev);
	int retval;

	retval = i2c_smbus_read_byte_data(data->client, sda->index);
	if (retval < 0)
		return retval;
	return sprintf(buf, "%d000\n", retval);
}

static ssize_t show_bit(struct device *dev,
			struct device_attribute *attr, char *buf)
{
	struct sensor_device_attribute_2 *sda = to_sensor_dev_attr_2(attr);
	struct thermal_data *data = dev_get_drvdata(dev);
	int retval;

	retval = i2c_smbus_read_byte_data(data->client, sda->nr);
	if (retval < 0)
		return retval;
	return sprintf(buf, "%d\n", !!(retval & sda->index));
}

static ssize_t store_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 thermal_data *data = dev_get_drvdata(dev);
	unsigned long val;
	int retval;

	if (kstrtoul(buf, 10, &val))
		return -EINVAL;
	retval = i2c_smbus_write_byte_data(data->client, sda->index,
					DIV_ROUND_CLOSEST(val, 1000));
	if (retval < 0)
		return retval;
	return count;
}

static ssize_t store_bit(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	struct sensor_device_attribute_2 *sda = to_sensor_dev_attr_2(attr);
	struct thermal_data *data = dev_get_drvdata(dev);
	struct i2c_client *client = data->client;
	unsigned long val;
	int retval;

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

	mutex_lock(&data->mutex);
	retval = i2c_smbus_read_byte_data(client, sda->nr);
	if (retval < 0)
		goto fail;

	retval &= ~sda->index;
	if (val)
		retval |= sda->index;

	retval = i2c_smbus_write_byte_data(client, sda->index, retval);
	if (retval == 0)
		retval = count;
fail:
	mutex_unlock(&data->mutex);
	return retval;
}

static ssize_t show_hyst(struct device *dev,
			struct device_attribute *attr, char *buf)
{
	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
	struct thermal_data *data = dev_get_drvdata(dev);
	struct i2c_client *client = data->client;
	int retval;
	int hyst;

	retval = i2c_smbus_read_byte_data(client, sda->index);
	if (retval < 0)
		return retval;

	if (time_after(jiffies, data->hyst_valid)) {
		hyst = i2c_smbus_read_byte_data(client, 0x21);
		if (hyst < 0)
			return retval;
		data->cached_hyst = hyst;
		data->hyst_valid = jiffies + HZ;
	}
	return sprintf(buf, "%d000\n", retval - data->cached_hyst);
}

static ssize_t store_hyst(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
	struct thermal_data *data = dev_get_drvdata(dev);
	struct i2c_client *client = data->client;
	int retval;
	int hyst;
	unsigned long val;

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

	mutex_lock(&data->mutex);
	retval = i2c_smbus_read_byte_data(client, sda->index);
	if (retval < 0)
		goto fail;

	hyst = val - retval * 1000;
	hyst = DIV_ROUND_CLOSEST(hyst, 1000);
	if (hyst < 0 || hyst > 255) {
		retval = -ERANGE;
		goto fail;
	}

	retval = i2c_smbus_write_byte_data(client, 0x21, hyst);
	if (retval == 0) {
		retval = count;
		data->cached_hyst = hyst;
		data->hyst_valid = jiffies + HZ;
	}
fail:
	mutex_unlock(&data->mutex);
	return retval;
}

/*
 *	Sensors. We pass the actual i2c register to the methods.
 */

static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO | S_IWUSR,
	show_temp, store_temp, 0x06);
static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
	show_temp, store_temp, 0x05);
static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO | S_IWUSR,
	show_temp, store_temp, 0x20);
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0x00);
static SENSOR_DEVICE_ATTR_2(temp1_min_alarm, S_IRUGO,
	show_bit, NULL, 0x36, 0x01);
static SENSOR_DEVICE_ATTR_2(temp1_max_alarm, S_IRUGO,
	show_bit, NULL, 0x35, 0x01);
static SENSOR_DEVICE_ATTR_2(temp1_crit_alarm, S_IRUGO,
	show_bit, NULL, 0x37, 0x01);
static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO | S_IWUSR,
	show_hyst, store_hyst, 0x20);

static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO | S_IWUSR,
	show_temp, store_temp, 0x08);
static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
	show_temp, store_temp, 0x07);
static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO | S_IWUSR,
	show_temp, store_temp, 0x19);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 0x01);
static SENSOR_DEVICE_ATTR_2(temp2_min_alarm, S_IRUGO,
	show_bit, NULL, 0x36, 0x02);
static SENSOR_DEVICE_ATTR_2(temp2_max_alarm, S_IRUGO,
	show_bit, NULL, 0x35, 0x02);
static SENSOR_DEVICE_ATTR_2(temp2_crit_alarm, S_IRUGO,
	show_bit, NULL, 0x37, 0x02);
static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO | S_IWUSR,
	show_hyst, store_hyst, 0x19);

static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO | S_IWUSR,
	show_temp, store_temp, 0x16);
static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO | S_IWUSR,
	show_temp, store_temp, 0x15);
static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO | S_IWUSR,
	show_temp, store_temp, 0x1A);
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 0x23);
static SENSOR_DEVICE_ATTR_2(temp3_min_alarm, S_IRUGO,
	show_bit, NULL, 0x36, 0x04);
static SENSOR_DEVICE_ATTR_2(temp3_max_alarm, S_IRUGO,
	show_bit, NULL, 0x35, 0x04);
static SENSOR_DEVICE_ATTR_2(temp3_crit_alarm, S_IRUGO,
	show_bit, NULL, 0x37, 0x04);
static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO | S_IWUSR,
	show_hyst, store_hyst, 0x1A);

static SENSOR_DEVICE_ATTR_2(power_state, S_IRUGO | S_IWUSR,
	show_bit, store_bit, 0x03, 0x40);

static struct attribute *emc1403_attrs[] = {
	&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_input.dev_attr.attr,
	&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
	&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
	&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
	&sensor_dev_attr_temp1_crit_hyst.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_input.dev_attr.attr,
	&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
	&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
	&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
	&sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
	&sensor_dev_attr_temp3_min.dev_attr.attr,
	&sensor_dev_attr_temp3_max.dev_attr.attr,
	&sensor_dev_attr_temp3_crit.dev_attr.attr,
	&sensor_dev_attr_temp3_input.dev_attr.attr,
	&sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
	&sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
	&sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
	&sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
	&sensor_dev_attr_power_state.dev_attr.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 0x21:
		strlcpy(info->type, "emc1403", I2C_NAME_SIZE);
		break;
	case 0x23:
		strlcpy(info->type, "emc1423", I2C_NAME_SIZE);
		break;
	/*
	 * Note: 0x25 is the 1404 which is very similar and this
	 * driver could be extended
	 */
	default:
		return -ENODEV;
	}

	id = i2c_smbus_read_byte_data(client, THERMAL_REVISION_REG);
	if (id != 0x01)
		return -ENODEV;

	return 0;
}

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

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

	data->client = client;
	mutex_init(&data->mutex);
	data->hyst_valid = jiffies - 1;		/* Expired */

	hwmon_dev = hwmon_device_register_with_groups(&client->dev,
						      client->name, data,
						      emc1403_groups);
	if (IS_ERR(hwmon_dev))
		return PTR_ERR(hwmon_dev);

	dev_info(&client->dev, "EMC1403 Thermal chip found\n");
	return 0;
}

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

static const struct i2c_device_id emc1403_idtable[] = {
	{ "emc1403", 0 },
	{ "emc1423", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, emc1403_idtable);

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");
Commit	Line	Data
dac6831e KT	1	/*
	2	* emc1403.c - SMSC Thermal Driver
	3	*
	4	* Copyright (C) 2008 Intel Corp
	5	*
	6	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	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; version 2 of the License.
	11	*
	12	* This program is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License along
	18	* with this program; if not, write to the Free Software Foundation, Inc.,
	19	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
	20	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	21	*
	22	* TODO
	23	* - cache alarm and critical limit registers
	24	* - add emc1404 support
	25	*/
	26
	27	#include <linux/module.h>
	28	#include <linux/init.h>
	29	#include <linux/slab.h>
	30	#include <linux/i2c.h>
	31	#include <linux/hwmon.h>
	32	#include <linux/hwmon-sysfs.h>
	33	#include <linux/err.h>
	34	#include <linux/sysfs.h>
	35	#include <linux/mutex.h>
dcd8f392	36	#include <linux/jiffies.h>
dac6831e KT	37
	38	#define THERMAL_PID_REG 0xfd
	39	#define THERMAL_SMSC_ID_REG 0xfe
	40	#define THERMAL_REVISION_REG 0xff
	41
	42	struct thermal_data {
454aee17	43	struct i2c_client *client;
dac6831e	44	struct mutex mutex;
4bebced8 GR	45	/*
	46	* Cache the hyst value so we don't keep re-reading it. In theory
	47	* we could cache it forever as nobody else should be writing it.
	48	*/
dac6831e KT	49	u8 cached_hyst;
	50	unsigned long hyst_valid;
	51	};
	52
	53	static ssize_t show_temp(struct device *dev,
	54	struct device_attribute attr, char buf)
	55	{
dac6831e	56	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
454aee17 GR	57	struct thermal_data *data = dev_get_drvdata(dev);
454aee17 GR	58	int retval;
dac6831e	59
454aee17	60	retval = i2c_smbus_read_byte_data(data->client, sda->index);
dac6831e KT	61	if (retval < 0)
	62	return retval;
	63	return sprintf(buf, "%d000\n", retval);
	64	}
	65
	66	static ssize_t show_bit(struct device *dev,
	67	struct device_attribute attr, char buf)
	68	{
dac6831e	69	struct sensor_device_attribute_2 *sda = to_sensor_dev_attr_2(attr);
454aee17 GR	70	struct thermal_data *data = dev_get_drvdata(dev);
454aee17 GR	71	int retval;
dac6831e	72
454aee17	73	retval = i2c_smbus_read_byte_data(data->client, sda->nr);
dac6831e KT	74	if (retval < 0)
dac6831e KT	75	return retval;
454aee17	76	return sprintf(buf, "%d\n", !!(retval & sda->index));
dac6831e KT	77	}
	78
	79	static ssize_t store_temp(struct device *dev,
	80	struct device_attribute attr, const char buf, size_t count)
	81	{
	82	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
454aee17	83	struct thermal_data *data = dev_get_drvdata(dev);
dac6831e KT	84	unsigned long val;
	85	int retval;
	86
179c4fdb	87	if (kstrtoul(buf, 10, &val))
dac6831e	88	return -EINVAL;
454aee17	89	retval = i2c_smbus_write_byte_data(data->client, sda->index,
dac6831e KT	90	DIV_ROUND_CLOSEST(val, 1000));
	91	if (retval < 0)
	92	return retval;
	93	return count;
	94	}
	95
960f12f4 AC	96	static ssize_t store_bit(struct device *dev,
	97	struct device_attribute attr, const char buf, size_t count)
	98	{
960f12f4	99	struct sensor_device_attribute_2 *sda = to_sensor_dev_attr_2(attr);
454aee17 GR	100	struct thermal_data *data = dev_get_drvdata(dev);
454aee17 GR	101	struct i2c_client *client = data->client;
960f12f4 AC	102	unsigned long val;
	103	int retval;
	104
179c4fdb	105	if (kstrtoul(buf, 10, &val))
960f12f4 AC	106	return -EINVAL;
	107
	108	mutex_lock(&data->mutex);
	109	retval = i2c_smbus_read_byte_data(client, sda->nr);
	110	if (retval < 0)
	111	goto fail;
	112
	113	retval &= ~sda->index;
	114	if (val)
	115	retval \|= sda->index;
	116
	117	retval = i2c_smbus_write_byte_data(client, sda->index, retval);
	118	if (retval == 0)
	119	retval = count;
	120	fail:
	121	mutex_unlock(&data->mutex);
	122	return retval;
	123	}
	124
dac6831e KT	125	static ssize_t show_hyst(struct device *dev,
	126	struct device_attribute attr, char buf)
	127	{
dac6831e	128	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
454aee17 GR	129	struct thermal_data *data = dev_get_drvdata(dev);
454aee17 GR	130	struct i2c_client *client = data->client;
dac6831e KT	131	int retval;
	132	int hyst;
	133
	134	retval = i2c_smbus_read_byte_data(client, sda->index);
	135	if (retval < 0)
	136	return retval;
	137
	138	if (time_after(jiffies, data->hyst_valid)) {
	139	hyst = i2c_smbus_read_byte_data(client, 0x21);
	140	if (hyst < 0)
	141	return retval;
	142	data->cached_hyst = hyst;
	143	data->hyst_valid = jiffies + HZ;
	144	}
	145	return sprintf(buf, "%d000\n", retval - data->cached_hyst);
	146	}
	147
	148	static ssize_t store_hyst(struct device *dev,
	149	struct device_attribute attr, const char buf, size_t count)
	150	{
dac6831e	151	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
454aee17 GR	152	struct thermal_data *data = dev_get_drvdata(dev);
454aee17 GR	153	struct i2c_client *client = data->client;
dac6831e KT	154	int retval;
	155	int hyst;
	156	unsigned long val;
	157
179c4fdb	158	if (kstrtoul(buf, 10, &val))
dac6831e KT	159	return -EINVAL;
	160
	161	mutex_lock(&data->mutex);
	162	retval = i2c_smbus_read_byte_data(client, sda->index);
	163	if (retval < 0)
	164	goto fail;
	165
	166	hyst = val - retval * 1000;
	167	hyst = DIV_ROUND_CLOSEST(hyst, 1000);
	168	if (hyst < 0 \|\| hyst > 255) {
	169	retval = -ERANGE;
	170	goto fail;
	171	}
	172
	173	retval = i2c_smbus_write_byte_data(client, 0x21, hyst);
	174	if (retval == 0) {
	175	retval = count;
	176	data->cached_hyst = hyst;
	177	data->hyst_valid = jiffies + HZ;
	178	}
	179	fail:
	180	mutex_unlock(&data->mutex);
	181	return retval;
	182	}
	183
	184	/*
	185	* Sensors. We pass the actual i2c register to the methods.
	186	*/
	187
	188	static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO \| S_IWUSR,
	189	show_temp, store_temp, 0x06);
	190	static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO \| S_IWUSR,
	191	show_temp, store_temp, 0x05);
	192	static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO \| S_IWUSR,
	193	show_temp, store_temp, 0x20);
	194	static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0x00);
	195	static SENSOR_DEVICE_ATTR_2(temp1_min_alarm, S_IRUGO,
	196	show_bit, NULL, 0x36, 0x01);
	197	static SENSOR_DEVICE_ATTR_2(temp1_max_alarm, S_IRUGO,
	198	show_bit, NULL, 0x35, 0x01);
	199	static SENSOR_DEVICE_ATTR_2(temp1_crit_alarm, S_IRUGO,
	200	show_bit, NULL, 0x37, 0x01);
	201	static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO \| S_IWUSR,
	202	show_hyst, store_hyst, 0x20);
	203
	204	static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO \| S_IWUSR,
	205	show_temp, store_temp, 0x08);
	206	static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO \| S_IWUSR,
	207	show_temp, store_temp, 0x07);
	208	static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO \| S_IWUSR,
	209	show_temp, store_temp, 0x19);
	210	static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 0x01);
	211	static SENSOR_DEVICE_ATTR_2(temp2_min_alarm, S_IRUGO,
	212	show_bit, NULL, 0x36, 0x02);
	213	static SENSOR_DEVICE_ATTR_2(temp2_max_alarm, S_IRUGO,
	214	show_bit, NULL, 0x35, 0x02);
	215	static SENSOR_DEVICE_ATTR_2(temp2_crit_alarm, S_IRUGO,
	216	show_bit, NULL, 0x37, 0x02);
	217	static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO \| S_IWUSR,
	218	show_hyst, store_hyst, 0x19);
	219
	220	static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO \| S_IWUSR,
	221	show_temp, store_temp, 0x16);
	222	static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO \| S_IWUSR,
223	show_temp, store_temp, 0x15);
224	static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO \| S_IWUSR,
225	show_temp, store_temp, 0x1A);
226	static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 0x23);
227	static SENSOR_DEVICE_ATTR_2(temp3_min_alarm, S_IRUGO,
228	show_bit, NULL, 0x36, 0x04);
229	static SENSOR_DEVICE_ATTR_2(temp3_max_alarm, S_IRUGO,
230	show_bit, NULL, 0x35, 0x04);
231	static SENSOR_DEVICE_ATTR_2(temp3_crit_alarm, S_IRUGO,
232	show_bit, NULL, 0x37, 0x04);
233	static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO \| S_IWUSR,
234	show_hyst, store_hyst, 0x1A);
235
960f12f4 AC	236	static SENSOR_DEVICE_ATTR_2(power_state, S_IRUGO \| S_IWUSR,
	237	show_bit, store_bit, 0x03, 0x40);
	238
454aee17	239	static struct attribute *emc1403_attrs[] = {
dac6831e KT	240	&sensor_dev_attr_temp1_min.dev_attr.attr,
	241	&sensor_dev_attr_temp1_max.dev_attr.attr,
	242	&sensor_dev_attr_temp1_crit.dev_attr.attr,
	243	&sensor_dev_attr_temp1_input.dev_attr.attr,
	244	&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
	245	&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
	246	&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
	247	&sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
	248	&sensor_dev_attr_temp2_min.dev_attr.attr,
	249	&sensor_dev_attr_temp2_max.dev_attr.attr,
	250	&sensor_dev_attr_temp2_crit.dev_attr.attr,
	251	&sensor_dev_attr_temp2_input.dev_attr.attr,
	252	&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
	253	&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
	254	&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
	255	&sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
	256	&sensor_dev_attr_temp3_min.dev_attr.attr,
	257	&sensor_dev_attr_temp3_max.dev_attr.attr,
	258	&sensor_dev_attr_temp3_crit.dev_attr.attr,
	259	&sensor_dev_attr_temp3_input.dev_attr.attr,
	260	&sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
	261	&sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
	262	&sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
	263	&sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
960f12f4	264	&sensor_dev_attr_power_state.dev_attr.attr,
dac6831e KT	265	NULL
dac6831e KT	266	};
454aee17	267	ATTRIBUTE_GROUPS(emc1403);
dac6831e KT	268
	269	static int emc1403_detect(struct i2c_client *client,
	270	struct i2c_board_info *info)
	271	{
	272	int id;
7a1b76f2	273	/* Check if thermal chip is SMSC and EMC1403 or EMC1423 */
dac6831e KT	274
	275	id = i2c_smbus_read_byte_data(client, THERMAL_SMSC_ID_REG);
	276	if (id != 0x5d)
	277	return -ENODEV;
	278
7a1b76f2 JL	279	id = i2c_smbus_read_byte_data(client, THERMAL_PID_REG);
	280	switch (id) {
	281	case 0x21:
	282	strlcpy(info->type, "emc1403", I2C_NAME_SIZE);
	283	break;
	284	case 0x23:
	285	strlcpy(info->type, "emc1423", I2C_NAME_SIZE);
	286	break;
4bebced8 GR	287	/*
	288	* Note: 0x25 is the 1404 which is very similar and this
	289	* driver could be extended
	290	*/
7a1b76f2	291	default:
dac6831e	292	return -ENODEV;
7a1b76f2	293	}
dac6831e KT	294
	295	id = i2c_smbus_read_byte_data(client, THERMAL_REVISION_REG);
	296	if (id != 0x01)
	297	return -ENODEV;
	298
dac6831e KT	299	return 0;
	300	}
	301
	302	static int emc1403_probe(struct i2c_client *client,
	303	const struct i2c_device_id *id)
	304	{
dac6831e	305	struct thermal_data *data;
454aee17	306	struct device *hwmon_dev;
dac6831e	307
7b52eefe GR	308	data = devm_kzalloc(&client->dev, sizeof(struct thermal_data),
	309	GFP_KERNEL);
	310	if (data == NULL)
dac6831e	311	return -ENOMEM;
dac6831e	312
454aee17	313	data->client = client;
dac6831e KT	314	mutex_init(&data->mutex);
	315	data->hyst_valid = jiffies - 1; /* Expired */
	316
454aee17 GR	317	hwmon_dev = hwmon_device_register_with_groups(&client->dev,
	318	client->name, data,
	319	emc1403_groups);
	320	if (IS_ERR(hwmon_dev))
	321	return PTR_ERR(hwmon_dev);
dac6831e	322
454aee17	323	dev_info(&client->dev, "EMC1403 Thermal chip found\n");
dac6831e KT	324	return 0;
	325	}
	326
	327	static const unsigned short emc1403_address_list[] = {
bcf721d1	328	0x18, 0x29, 0x4c, 0x4d, I2C_CLIENT_END
dac6831e KT	329	};
	330
	331	static const struct i2c_device_id emc1403_idtable[] = {
	332	{ "emc1403", 0 },
7a1b76f2	333	{ "emc1423", 0 },
dac6831e KT	334	{ }
	335	};
	336	MODULE_DEVICE_TABLE(i2c, emc1403_idtable);
	337
	338	static struct i2c_driver sensor_emc1403 = {
	339	.class = I2C_CLASS_HWMON,
	340	.driver = {
	341	.name = "emc1403",
	342	},
	343	.detect = emc1403_detect,
	344	.probe = emc1403_probe,
dac6831e KT	345	.id_table = emc1403_idtable,
	346	.address_list = emc1403_address_list,
	347	};
	348
f0967eea	349	module_i2c_driver(sensor_emc1403);
dac6831e KT	350
	351	MODULE_AUTHOR("Kalhan Trisal <kalhan.trisal@intel.com");
	352	MODULE_DESCRIPTION("emc1403 Thermal Driver");
	353	MODULE_LICENSE("GPL v2");