[GitHub/mt8127/android_kernel_alcatel_ttab.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 (strict_strtoul(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 (strict_strtoul(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 (strict_strtoul(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 */

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

	/* Note: 0x25 is the 1404 which is very similar and this
	   driver could be extended */
	id = i2c_smbus_read_byte_data(client, THERMAL_PID_REG);
	if (id != 0x21)
		return -ENODEV;

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

	strlcpy(info->type, "emc1403", I2C_NAME_SIZE);
	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, 0x2a, 0x4c, 0x4d, I2C_CLIENT_END
};

static const struct i2c_device_id emc1403_idtable[] = {
	{ "emc1403", 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,
};

static int __init sensor_emc1403_init(void)
{
	return i2c_add_driver(&sensor_emc1403);
}

static void  __exit sensor_emc1403_exit(void)
{
	i2c_del_driver(&sensor_emc1403);
}

module_init(sensor_emc1403_init);
module_exit(sensor_emc1403_exit);

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;
	44	/* Cache the hyst value so we don't keep re-reading it. In theory
	45	we could cache it forever as nobody else should be writing it. */
	46	u8 cached_hyst;
	47	unsigned long hyst_valid;
	48	};
	49
	50	static ssize_t show_temp(struct device *dev,
	51	struct device_attribute attr, char buf)
	52	{
	53	struct i2c_client *client = to_i2c_client(dev);
	54	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
	55	int retval = i2c_smbus_read_byte_data(client, sda->index);
	56
	57	if (retval < 0)
	58	return retval;
	59	return sprintf(buf, "%d000\n", retval);
	60	}
	61
	62	static ssize_t show_bit(struct device *dev,
	63	struct device_attribute attr, char buf)
	64	{
65	struct i2c_client *client = to_i2c_client(dev);
66	struct sensor_device_attribute_2 *sda = to_sensor_dev_attr_2(attr);
67	int retval = i2c_smbus_read_byte_data(client, sda->nr);
68
69	if (retval < 0)
70	return retval;
71	retval &= sda->index;
72	return sprintf(buf, "%d\n", retval ? 1 : 0);
73	}
74
75	static ssize_t store_temp(struct device *dev,
76	struct device_attribute attr, const char buf, size_t count)
77	{
78	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
79	struct i2c_client *client = to_i2c_client(dev);
80	unsigned long val;
81	int retval;
82
83	if (strict_strtoul(buf, 10, &val))
84	return -EINVAL;
85	retval = i2c_smbus_write_byte_data(client, sda->index,
86	DIV_ROUND_CLOSEST(val, 1000));
87	if (retval < 0)
88	return retval;
89	return count;
90	}
91
960f12f4 AC	92	static ssize_t store_bit(struct device *dev,
	93	struct device_attribute attr, const char buf, size_t count)
	94	{
	95	struct i2c_client *client = to_i2c_client(dev);
	96	struct thermal_data *data = i2c_get_clientdata(client);
	97	struct sensor_device_attribute_2 *sda = to_sensor_dev_attr_2(attr);
	98	unsigned long val;
	99	int retval;
	100
	101	if (strict_strtoul(buf, 10, &val))
	102	return -EINVAL;
	103
	104	mutex_lock(&data->mutex);
	105	retval = i2c_smbus_read_byte_data(client, sda->nr);
	106	if (retval < 0)
	107	goto fail;
	108
	109	retval &= ~sda->index;
	110	if (val)
	111	retval \|= sda->index;
	112
	113	retval = i2c_smbus_write_byte_data(client, sda->index, retval);
	114	if (retval == 0)
	115	retval = count;
	116	fail:
	117	mutex_unlock(&data->mutex);
	118	return retval;
	119	}
	120
dac6831e KT	121	static ssize_t show_hyst(struct device *dev,
	122	struct device_attribute attr, char buf)
	123	{
	124	struct i2c_client *client = to_i2c_client(dev);
	125	struct thermal_data *data = i2c_get_clientdata(client);
	126	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
	127	int retval;
	128	int hyst;
	129
	130	retval = i2c_smbus_read_byte_data(client, sda->index);
	131	if (retval < 0)
	132	return retval;
	133
	134	if (time_after(jiffies, data->hyst_valid)) {
	135	hyst = i2c_smbus_read_byte_data(client, 0x21);
	136	if (hyst < 0)
	137	return retval;
	138	data->cached_hyst = hyst;
	139	data->hyst_valid = jiffies + HZ;
	140	}
	141	return sprintf(buf, "%d000\n", retval - data->cached_hyst);
	142	}
	143
	144	static ssize_t store_hyst(struct device *dev,
	145	struct device_attribute attr, const char buf, size_t count)
	146	{
	147	struct i2c_client *client = to_i2c_client(dev);
	148	struct thermal_data *data = i2c_get_clientdata(client);
	149	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
	150	int retval;
	151	int hyst;
	152	unsigned long val;
	153
	154	if (strict_strtoul(buf, 10, &val))
	155	return -EINVAL;
	156
	157	mutex_lock(&data->mutex);
	158	retval = i2c_smbus_read_byte_data(client, sda->index);
	159	if (retval < 0)
	160	goto fail;
	161
	162	hyst = val - retval * 1000;
	163	hyst = DIV_ROUND_CLOSEST(hyst, 1000);
	164	if (hyst < 0 \|\| hyst > 255) {
	165	retval = -ERANGE;
	166	goto fail;
	167	}
	168
	169	retval = i2c_smbus_write_byte_data(client, 0x21, hyst);
	170	if (retval == 0) {
	171	retval = count;
	172	data->cached_hyst = hyst;
	173	data->hyst_valid = jiffies + HZ;
	174	}
	175	fail:
	176	mutex_unlock(&data->mutex);
	177	return retval;
	178	}
	179
	180	/*
	181	* Sensors. We pass the actual i2c register to the methods.
	182	*/
	183
	184	static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO \| S_IWUSR,
185	show_temp, store_temp, 0x06);
186	static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO \| S_IWUSR,
187	show_temp, store_temp, 0x05);
188	static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO \| S_IWUSR,
189	show_temp, store_temp, 0x20);
190	static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0x00);
191	static SENSOR_DEVICE_ATTR_2(temp1_min_alarm, S_IRUGO,
192	show_bit, NULL, 0x36, 0x01);
193	static SENSOR_DEVICE_ATTR_2(temp1_max_alarm, S_IRUGO,
194	show_bit, NULL, 0x35, 0x01);
195	static SENSOR_DEVICE_ATTR_2(temp1_crit_alarm, S_IRUGO,
196	show_bit, NULL, 0x37, 0x01);
197	static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO \| S_IWUSR,
198	show_hyst, store_hyst, 0x20);
199
200	static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO \| S_IWUSR,
201	show_temp, store_temp, 0x08);
202	static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO \| S_IWUSR,
203	show_temp, store_temp, 0x07);
204	static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO \| S_IWUSR,
205	show_temp, store_temp, 0x19);
206	static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 0x01);
207	static SENSOR_DEVICE_ATTR_2(temp2_min_alarm, S_IRUGO,
208	show_bit, NULL, 0x36, 0x02);
209	static SENSOR_DEVICE_ATTR_2(temp2_max_alarm, S_IRUGO,
210	show_bit, NULL, 0x35, 0x02);
211	static SENSOR_DEVICE_ATTR_2(temp2_crit_alarm, S_IRUGO,
212	show_bit, NULL, 0x37, 0x02);
213	static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO \| S_IWUSR,
214	show_hyst, store_hyst, 0x19);
215
216	static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO \| S_IWUSR,
217	show_temp, store_temp, 0x16);
218	static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO \| S_IWUSR,
219	show_temp, store_temp, 0x15);
220	static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO \| S_IWUSR,
221	show_temp, store_temp, 0x1A);
222	static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 0x23);
223	static SENSOR_DEVICE_ATTR_2(temp3_min_alarm, S_IRUGO,
224	show_bit, NULL, 0x36, 0x04);
225	static SENSOR_DEVICE_ATTR_2(temp3_max_alarm, S_IRUGO,
226	show_bit, NULL, 0x35, 0x04);
227	static SENSOR_DEVICE_ATTR_2(temp3_crit_alarm, S_IRUGO,
228	show_bit, NULL, 0x37, 0x04);
229	static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO \| S_IWUSR,
230	show_hyst, store_hyst, 0x1A);
231
960f12f4 AC	232	static SENSOR_DEVICE_ATTR_2(power_state, S_IRUGO \| S_IWUSR,
	233	show_bit, store_bit, 0x03, 0x40);
	234
dac6831e KT	235	static struct attribute *mid_att_thermal[] = {
	236	&sensor_dev_attr_temp1_min.dev_attr.attr,
	237	&sensor_dev_attr_temp1_max.dev_attr.attr,
	238	&sensor_dev_attr_temp1_crit.dev_attr.attr,
	239	&sensor_dev_attr_temp1_input.dev_attr.attr,
	240	&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
	241	&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
	242	&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
	243	&sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
	244	&sensor_dev_attr_temp2_min.dev_attr.attr,
	245	&sensor_dev_attr_temp2_max.dev_attr.attr,
	246	&sensor_dev_attr_temp2_crit.dev_attr.attr,
	247	&sensor_dev_attr_temp2_input.dev_attr.attr,
	248	&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
	249	&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
	250	&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
	251	&sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
	252	&sensor_dev_attr_temp3_min.dev_attr.attr,
	253	&sensor_dev_attr_temp3_max.dev_attr.attr,
	254	&sensor_dev_attr_temp3_crit.dev_attr.attr,
	255	&sensor_dev_attr_temp3_input.dev_attr.attr,
	256	&sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
	257	&sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
	258	&sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
	259	&sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
960f12f4	260	&sensor_dev_attr_power_state.dev_attr.attr,
dac6831e KT	261	NULL
	262	};
	263
	264	static const struct attribute_group m_thermal_gr = {
	265	.attrs = mid_att_thermal
	266	};
	267
	268	static int emc1403_detect(struct i2c_client *client,
	269	struct i2c_board_info *info)
	270	{
	271	int id;
	272	/* Check if thermal chip is SMSC and EMC1403 */
	273
	274	id = i2c_smbus_read_byte_data(client, THERMAL_SMSC_ID_REG);
	275	if (id != 0x5d)
	276	return -ENODEV;
	277
	278	/* Note: 0x25 is the 1404 which is very similar and this
	279	driver could be extended */
	280	id = i2c_smbus_read_byte_data(client, THERMAL_PID_REG);
	281	if (id != 0x21)
	282	return -ENODEV;
	283
	284	id = i2c_smbus_read_byte_data(client, THERMAL_REVISION_REG);
	285	if (id != 0x01)
	286	return -ENODEV;
	287
	288	strlcpy(info->type, "emc1403", I2C_NAME_SIZE);
	289	return 0;
	290	}
	291
	292	static int emc1403_probe(struct i2c_client *client,
	293	const struct i2c_device_id *id)
	294	{
	295	int res;
	296	struct thermal_data *data;
	297
	298	data = kzalloc(sizeof(struct thermal_data), GFP_KERNEL);
	299	if (data == NULL) {
	300	dev_warn(&client->dev, "out of memory");
	301	return -ENOMEM;
	302	}
	303
	304	i2c_set_clientdata(client, data);
	305	mutex_init(&data->mutex);
	306	data->hyst_valid = jiffies - 1; /* Expired */
	307
	308	res = sysfs_create_group(&client->dev.kobj, &m_thermal_gr);
	309	if (res) {
	310	dev_warn(&client->dev, "create group failed\n");
dac6831e KT	311	goto thermal_error1;
	312	}
	313	data->hwmon_dev = hwmon_device_register(&client->dev);
	314	if (IS_ERR(data->hwmon_dev)) {
	315	res = PTR_ERR(data->hwmon_dev);
	316	dev_warn(&client->dev, "register hwmon dev failed\n");
	317	goto thermal_error2;
	318	}
	319	dev_info(&client->dev, "EMC1403 Thermal chip found\n");
	320	return res;
	321
	322	thermal_error2:
	323	sysfs_remove_group(&client->dev.kobj, &m_thermal_gr);
	324	thermal_error1:
	325	kfree(data);
	326	return res;
	327	}
	328
	329	static int emc1403_remove(struct i2c_client *client)
	330	{
	331	struct thermal_data *data = i2c_get_clientdata(client);
	332
	333	hwmon_device_unregister(data->hwmon_dev);
	334	sysfs_remove_group(&client->dev.kobj, &m_thermal_gr);
	335	kfree(data);
	336	return 0;
	337	}
	338
	339	static const unsigned short emc1403_address_list[] = {
	340	0x18, 0x2a, 0x4c, 0x4d, I2C_CLIENT_END
	341	};
	342
	343	static const struct i2c_device_id emc1403_idtable[] = {
	344	{ "emc1403", 0 },
	345	{ }
	346	};
	347	MODULE_DEVICE_TABLE(i2c, emc1403_idtable);
	348
	349	static struct i2c_driver sensor_emc1403 = {
	350	.class = I2C_CLASS_HWMON,
	351	.driver = {
	352	.name = "emc1403",
	353	},
	354	.detect = emc1403_detect,
	355	.probe = emc1403_probe,
	356	.remove = emc1403_remove,
	357	.id_table = emc1403_idtable,
	358	.address_list = emc1403_address_list,
	359	};
	360
	361	static int __init sensor_emc1403_init(void)
	362	{
	363	return i2c_add_driver(&sensor_emc1403);
	364	}
	365
	366	static void __exit sensor_emc1403_exit(void)
	367	{
	368	i2c_del_driver(&sensor_emc1403);
	369	}
	370
	371	module_init(sensor_emc1403_init);
	372	module_exit(sensor_emc1403_exit);
	373
	374	MODULE_AUTHOR("Kalhan Trisal <kalhan.trisal@intel.com");
375	MODULE_DESCRIPTION("emc1403 Thermal Driver");
376	MODULE_LICENSE("GPL v2");