[linux-2.6-block.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>

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

struct thermal_data {
	struct device *hwmon_dev;
	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 i2c_client *client = to_i2c_client(dev);
	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
	int retval = i2c_smbus_read_byte_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 i2c_client *client = to_i2c_client(dev);
	struct sensor_device_attribute_2 *sda = to_sensor_dev_attr_2(attr);
	int retval = i2c_smbus_read_byte_data(client, sda->nr);

	if (retval < 0)
		return retval;
	retval &= sda->index;
	return sprintf(buf, "%d\n", retval ? 1 : 0);
}

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 i2c_client *client = to_i2c_client(dev);
	unsigned long val;
	int retval;

	if (kstrtoul(buf, 10, &val))
		return -EINVAL;
	retval = i2c_smbus_write_byte_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 i2c_client *client = to_i2c_client(dev);
	struct thermal_data *data = i2c_get_clientdata(client);
	struct sensor_device_attribute_2 *sda = to_sensor_dev_attr_2(attr);
	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 i2c_client *client = to_i2c_client(dev);
	struct thermal_data *data = i2c_get_clientdata(client);
	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
	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 i2c_client *client = to_i2c_client(dev);
	struct thermal_data *data = i2c_get_clientdata(client);
	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
	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 *mid_att_thermal[] = {
	&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
};

static const struct attribute_group m_thermal_gr = {
	.attrs = mid_att_thermal
};

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)
{
	int res;
	struct thermal_data *data;

	data = kzalloc(sizeof(struct thermal_data), GFP_KERNEL);
	if (data == NULL) {
		dev_warn(&client->dev, "out of memory");
		return -ENOMEM;
	}

	i2c_set_clientdata(client, data);
	mutex_init(&data->mutex);
	data->hyst_valid = jiffies - 1;		/* Expired */

	res = sysfs_create_group(&client->dev.kobj, &m_thermal_gr);
	if (res) {
		dev_warn(&client->dev, "create group failed\n");
		goto thermal_error1;
	}
	data->hwmon_dev = hwmon_device_register(&client->dev);
	if (IS_ERR(data->hwmon_dev)) {
		res = PTR_ERR(data->hwmon_dev);
		dev_warn(&client->dev, "register hwmon dev failed\n");
		goto thermal_error2;
	}
	dev_info(&client->dev, "EMC1403 Thermal chip found\n");
	return res;

thermal_error2:
	sysfs_remove_group(&client->dev.kobj, &m_thermal_gr);
thermal_error1:
	kfree(data);
	return res;
}

static int emc1403_remove(struct i2c_client *client)
{
	struct thermal_data *data = i2c_get_clientdata(client);

	hwmon_device_unregister(data->hwmon_dev);
	sysfs_remove_group(&client->dev.kobj, &m_thermal_gr);
	kfree(data);
	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,
	.remove = emc1403_remove,
	.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>
	36
	37	#define THERMAL_PID_REG 0xfd
	38	#define THERMAL_SMSC_ID_REG 0xfe
	39	#define THERMAL_REVISION_REG 0xff
	40
	41	struct thermal_data {
	42	struct device *hwmon_dev;
	43	struct mutex mutex;
4bebced8 GR	44	/*
	45	* Cache the hyst value so we don't keep re-reading it. In theory
	46	* we could cache it forever as nobody else should be writing it.
	47	*/
dac6831e KT	48	u8 cached_hyst;
	49	unsigned long hyst_valid;
	50	};
	51
	52	static ssize_t show_temp(struct device *dev,
	53	struct device_attribute attr, char buf)
	54	{
	55	struct i2c_client *client = to_i2c_client(dev);
	56	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
	57	int retval = i2c_smbus_read_byte_data(client, sda->index);
	58
	59	if (retval < 0)
	60	return retval;
	61	return sprintf(buf, "%d000\n", retval);
	62	}
	63
	64	static ssize_t show_bit(struct device *dev,
	65	struct device_attribute attr, char buf)
	66	{
	67	struct i2c_client *client = to_i2c_client(dev);
	68	struct sensor_device_attribute_2 *sda = to_sensor_dev_attr_2(attr);
	69	int retval = i2c_smbus_read_byte_data(client, sda->nr);
	70
	71	if (retval < 0)
	72	return retval;
	73	retval &= sda->index;
	74	return sprintf(buf, "%d\n", retval ? 1 : 0);
	75	}
	76
	77	static ssize_t store_temp(struct device *dev,
	78	struct device_attribute attr, const char buf, size_t count)
	79	{
	80	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
	81	struct i2c_client *client = to_i2c_client(dev);
	82	unsigned long val;
	83	int retval;
	84
179c4fdb	85	if (kstrtoul(buf, 10, &val))
dac6831e KT	86	return -EINVAL;
	87	retval = i2c_smbus_write_byte_data(client, sda->index,
	88	DIV_ROUND_CLOSEST(val, 1000));
	89	if (retval < 0)
	90	return retval;
	91	return count;
	92	}
	93
960f12f4 AC	94	static ssize_t store_bit(struct device *dev,
	95	struct device_attribute attr, const char buf, size_t count)
	96	{
	97	struct i2c_client *client = to_i2c_client(dev);
	98	struct thermal_data *data = i2c_get_clientdata(client);
	99	struct sensor_device_attribute_2 *sda = to_sensor_dev_attr_2(attr);
	100	unsigned long val;
	101	int retval;
	102
179c4fdb	103	if (kstrtoul(buf, 10, &val))
960f12f4 AC	104	return -EINVAL;
	105
	106	mutex_lock(&data->mutex);
	107	retval = i2c_smbus_read_byte_data(client, sda->nr);
	108	if (retval < 0)
	109	goto fail;
	110
	111	retval &= ~sda->index;
	112	if (val)
	113	retval \|= sda->index;
	114
	115	retval = i2c_smbus_write_byte_data(client, sda->index, retval);
	116	if (retval == 0)
	117	retval = count;
	118	fail:
	119	mutex_unlock(&data->mutex);
	120	return retval;
	121	}
	122
dac6831e KT	123	static ssize_t show_hyst(struct device *dev,
	124	struct device_attribute attr, char buf)
	125	{
	126	struct i2c_client *client = to_i2c_client(dev);
	127	struct thermal_data *data = i2c_get_clientdata(client);
	128	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
	129	int retval;
	130	int hyst;
	131
	132	retval = i2c_smbus_read_byte_data(client, sda->index);
	133	if (retval < 0)
	134	return retval;
	135
	136	if (time_after(jiffies, data->hyst_valid)) {
	137	hyst = i2c_smbus_read_byte_data(client, 0x21);
	138	if (hyst < 0)
	139	return retval;
	140	data->cached_hyst = hyst;
	141	data->hyst_valid = jiffies + HZ;
	142	}
	143	return sprintf(buf, "%d000\n", retval - data->cached_hyst);
	144	}
	145
	146	static ssize_t store_hyst(struct device *dev,
	147	struct device_attribute attr, const char buf, size_t count)
	148	{
	149	struct i2c_client *client = to_i2c_client(dev);
	150	struct thermal_data *data = i2c_get_clientdata(client);
	151	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
	152	int retval;
	153	int hyst;
	154	unsigned long val;
	155
179c4fdb	156	if (kstrtoul(buf, 10, &val))
dac6831e KT	157	return -EINVAL;
	158
	159	mutex_lock(&data->mutex);
	160	retval = i2c_smbus_read_byte_data(client, sda->index);
	161	if (retval < 0)
	162	goto fail;
	163
	164	hyst = val - retval * 1000;
	165	hyst = DIV_ROUND_CLOSEST(hyst, 1000);
	166	if (hyst < 0 \|\| hyst > 255) {
	167	retval = -ERANGE;
	168	goto fail;
	169	}
	170
	171	retval = i2c_smbus_write_byte_data(client, 0x21, hyst);
	172	if (retval == 0) {
	173	retval = count;
	174	data->cached_hyst = hyst;
	175	data->hyst_valid = jiffies + HZ;
	176	}
	177	fail:
	178	mutex_unlock(&data->mutex);
	179	return retval;
	180	}
	181
	182	/*
	183	* Sensors. We pass the actual i2c register to the methods.
	184	*/
	185
	186	static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO \| S_IWUSR,
	187	show_temp, store_temp, 0x06);
	188	static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO \| S_IWUSR,
	189	show_temp, store_temp, 0x05);
	190	static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO \| S_IWUSR,
	191	show_temp, store_temp, 0x20);
	192	static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0x00);
	193	static SENSOR_DEVICE_ATTR_2(temp1_min_alarm, S_IRUGO,
	194	show_bit, NULL, 0x36, 0x01);
	195	static SENSOR_DEVICE_ATTR_2(temp1_max_alarm, S_IRUGO,
	196	show_bit, NULL, 0x35, 0x01);
	197	static SENSOR_DEVICE_ATTR_2(temp1_crit_alarm, S_IRUGO,
	198	show_bit, NULL, 0x37, 0x01);
	199	static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO \| S_IWUSR,
	200	show_hyst, store_hyst, 0x20);
	201
	202	static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO \| S_IWUSR,
	203	show_temp, store_temp, 0x08);
	204	static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO \| S_IWUSR,
	205	show_temp, store_temp, 0x07);
	206	static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO \| S_IWUSR,
	207	show_temp, store_temp, 0x19);
	208	static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 0x01);
	209	static SENSOR_DEVICE_ATTR_2(temp2_min_alarm, S_IRUGO,
	210	show_bit, NULL, 0x36, 0x02);
	211	static SENSOR_DEVICE_ATTR_2(temp2_max_alarm, S_IRUGO,
	212	show_bit, NULL, 0x35, 0x02);
	213	static SENSOR_DEVICE_ATTR_2(temp2_crit_alarm, S_IRUGO,
	214	show_bit, NULL, 0x37, 0x02);
	215	static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO \| S_IWUSR,
	216	show_hyst, store_hyst, 0x19);
	217
	218	static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO \| S_IWUSR,
	219	show_temp, store_temp, 0x16);
	220	static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO \| S_IWUSR,
221	show_temp, store_temp, 0x15);
222	static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO \| S_IWUSR,
223	show_temp, store_temp, 0x1A);
224	static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 0x23);
225	static SENSOR_DEVICE_ATTR_2(temp3_min_alarm, S_IRUGO,
226	show_bit, NULL, 0x36, 0x04);
227	static SENSOR_DEVICE_ATTR_2(temp3_max_alarm, S_IRUGO,
228	show_bit, NULL, 0x35, 0x04);
229	static SENSOR_DEVICE_ATTR_2(temp3_crit_alarm, S_IRUGO,
230	show_bit, NULL, 0x37, 0x04);
231	static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO \| S_IWUSR,
232	show_hyst, store_hyst, 0x1A);
233
960f12f4 AC	234	static SENSOR_DEVICE_ATTR_2(power_state, S_IRUGO \| S_IWUSR,
	235	show_bit, store_bit, 0x03, 0x40);
	236
dac6831e KT	237	static struct attribute *mid_att_thermal[] = {
	238	&sensor_dev_attr_temp1_min.dev_attr.attr,
	239	&sensor_dev_attr_temp1_max.dev_attr.attr,
	240	&sensor_dev_attr_temp1_crit.dev_attr.attr,
	241	&sensor_dev_attr_temp1_input.dev_attr.attr,
	242	&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
	243	&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
	244	&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
	245	&sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
	246	&sensor_dev_attr_temp2_min.dev_attr.attr,
	247	&sensor_dev_attr_temp2_max.dev_attr.attr,
	248	&sensor_dev_attr_temp2_crit.dev_attr.attr,
	249	&sensor_dev_attr_temp2_input.dev_attr.attr,
	250	&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
	251	&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
	252	&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
	253	&sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
	254	&sensor_dev_attr_temp3_min.dev_attr.attr,
	255	&sensor_dev_attr_temp3_max.dev_attr.attr,
	256	&sensor_dev_attr_temp3_crit.dev_attr.attr,
	257	&sensor_dev_attr_temp3_input.dev_attr.attr,
	258	&sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
	259	&sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
	260	&sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
	261	&sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
960f12f4	262	&sensor_dev_attr_power_state.dev_attr.attr,
dac6831e KT	263	NULL
	264	};
	265
	266	static const struct attribute_group m_thermal_gr = {
	267	.attrs = mid_att_thermal
	268	};
	269
	270	static int emc1403_detect(struct i2c_client *client,
	271	struct i2c_board_info *info)
	272	{
	273	int id;
7a1b76f2	274	/* Check if thermal chip is SMSC and EMC1403 or EMC1423 */
dac6831e KT	275
	276	id = i2c_smbus_read_byte_data(client, THERMAL_SMSC_ID_REG);
	277	if (id != 0x5d)
	278	return -ENODEV;
	279
7a1b76f2 JL	280	id = i2c_smbus_read_byte_data(client, THERMAL_PID_REG);
	281	switch (id) {
	282	case 0x21:
	283	strlcpy(info->type, "emc1403", I2C_NAME_SIZE);
	284	break;
	285	case 0x23:
	286	strlcpy(info->type, "emc1423", I2C_NAME_SIZE);
	287	break;
4bebced8 GR	288	/*
	289	* Note: 0x25 is the 1404 which is very similar and this
	290	* driver could be extended
	291	*/
7a1b76f2	292	default:
dac6831e	293	return -ENODEV;
7a1b76f2	294	}
dac6831e KT	295
	296	id = i2c_smbus_read_byte_data(client, THERMAL_REVISION_REG);
	297	if (id != 0x01)
	298	return -ENODEV;
	299
dac6831e KT	300	return 0;
	301	}
	302
	303	static int emc1403_probe(struct i2c_client *client,
	304	const struct i2c_device_id *id)
	305	{
	306	int res;
	307	struct thermal_data *data;
	308
	309	data = kzalloc(sizeof(struct thermal_data), GFP_KERNEL);
	310	if (data == NULL) {
	311	dev_warn(&client->dev, "out of memory");
	312	return -ENOMEM;
	313	}
	314
	315	i2c_set_clientdata(client, data);
	316	mutex_init(&data->mutex);
	317	data->hyst_valid = jiffies - 1; /* Expired */
	318
	319	res = sysfs_create_group(&client->dev.kobj, &m_thermal_gr);
	320	if (res) {
	321	dev_warn(&client->dev, "create group failed\n");
dac6831e KT	322	goto thermal_error1;
	323	}
	324	data->hwmon_dev = hwmon_device_register(&client->dev);
	325	if (IS_ERR(data->hwmon_dev)) {
	326	res = PTR_ERR(data->hwmon_dev);
	327	dev_warn(&client->dev, "register hwmon dev failed\n");
	328	goto thermal_error2;
	329	}
	330	dev_info(&client->dev, "EMC1403 Thermal chip found\n");
	331	return res;
	332
	333	thermal_error2:
	334	sysfs_remove_group(&client->dev.kobj, &m_thermal_gr);
	335	thermal_error1:
	336	kfree(data);
	337	return res;
	338	}
	339
	340	static int emc1403_remove(struct i2c_client *client)
	341	{
	342	struct thermal_data *data = i2c_get_clientdata(client);
	343
	344	hwmon_device_unregister(data->hwmon_dev);
	345	sysfs_remove_group(&client->dev.kobj, &m_thermal_gr);
	346	kfree(data);
	347	return 0;
	348	}
	349
	350	static const unsigned short emc1403_address_list[] = {
bcf721d1	351	0x18, 0x29, 0x4c, 0x4d, I2C_CLIENT_END
dac6831e KT	352	};
	353
	354	static const struct i2c_device_id emc1403_idtable[] = {
	355	{ "emc1403", 0 },
7a1b76f2	356	{ "emc1423", 0 },
dac6831e KT	357	{ }
	358	};
	359	MODULE_DEVICE_TABLE(i2c, emc1403_idtable);
	360
	361	static struct i2c_driver sensor_emc1403 = {
	362	.class = I2C_CLASS_HWMON,
	363	.driver = {
	364	.name = "emc1403",
	365	},
	366	.detect = emc1403_detect,
	367	.probe = emc1403_probe,
	368	.remove = emc1403_remove,
	369	.id_table = emc1403_idtable,
	370	.address_list = emc1403_address_list,
	371	};
	372
f0967eea	373	module_i2c_driver(sensor_emc1403);
dac6831e KT	374
	375	MODULE_AUTHOR("Kalhan Trisal <kalhan.trisal@intel.com");
	376	MODULE_DESCRIPTION("emc1403 Thermal Driver");
	377	MODULE_LICENSE("GPL v2");