[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
 */

#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

enum emc1403_chip { emc1402, emc1403, emc1404 };

struct thermal_data {
	struct i2c_client *client;
	const struct attribute_group *groups[4];
	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 = retval * 1000 - val;
	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(temp4_min, S_IRUGO | S_IWUSR,
	show_temp, store_temp, 0x2D);
static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO | S_IWUSR,
	show_temp, store_temp, 0x2C);
static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO | S_IWUSR,
	show_temp, store_temp, 0x30);
static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 0x2A);
static SENSOR_DEVICE_ATTR_2(temp4_min_alarm, S_IRUGO,
	show_bit, NULL, 0x36, 0x08);
static SENSOR_DEVICE_ATTR_2(temp4_max_alarm, S_IRUGO,
	show_bit, NULL, 0x35, 0x08);
static SENSOR_DEVICE_ATTR_2(temp4_crit_alarm, S_IRUGO,
	show_bit, NULL, 0x37, 0x08);
static SENSOR_DEVICE_ATTR(temp4_crit_hyst, S_IRUGO | S_IWUSR,
	show_hyst, store_hyst, 0x30);

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

static struct attribute *emc1402_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_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_crit_hyst.dev_attr.attr,

	&sensor_dev_attr_power_state.dev_attr.attr,
	NULL
};

static const struct attribute_group emc1402_group = {
		.attrs = emc1402_attrs,
};

static struct attribute *emc1403_attrs[] = {
	&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_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_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,
	NULL
};

static const struct attribute_group emc1403_group = {
	.attrs = emc1403_attrs,
};

static struct attribute *emc1404_attrs[] = {
	&sensor_dev_attr_temp4_min.dev_attr.attr,
	&sensor_dev_attr_temp4_max.dev_attr.attr,
	&sensor_dev_attr_temp4_crit.dev_attr.attr,
	&sensor_dev_attr_temp4_input.dev_attr.attr,
	&sensor_dev_attr_temp4_min_alarm.dev_attr.attr,
	&sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
	&sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
	&sensor_dev_attr_temp4_crit_hyst.dev_attr.attr,
	NULL
};

static const struct attribute_group emc1404_group = {
	.attrs = emc1404_attrs,
};

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:
		strlcpy(info->type, "emc1402", I2C_NAME_SIZE);
		break;
	case 0x21:
		strlcpy(info->type, "emc1403", I2C_NAME_SIZE);
		break;
	case 0x22:
		strlcpy(info->type, "emc1422", I2C_NAME_SIZE);
		break;
	case 0x23:
		strlcpy(info->type, "emc1423", I2C_NAME_SIZE);
		break;
	case 0x25:
		strlcpy(info->type, "emc1404", I2C_NAME_SIZE);
		break;
	case 0x27:
		strlcpy(info->type, "emc1424", 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 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 */

	switch (id->driver_data) {
	case emc1404:
		data->groups[2] = &emc1404_group;
	case emc1403:
		data->groups[1] = &emc1403_group;
	case emc1402:
		data->groups[0] = &emc1402_group;
	}

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

	dev_info(&client->dev, "%s Thermal chip found\n", id->name);
	return 0;
}

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

/* Last digit of chip name indicates number of channels */
static const struct i2c_device_id emc1403_idtable[] = {
	{ "emc1402", emc1402 },
	{ "emc1403", emc1403 },
	{ "emc1404", emc1404 },
	{ "emc1422", emc1402 },
	{ "emc1423", emc1403 },
	{ "emc1424", emc1404 },
	{ }
};
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
dac6831e KT	24	*/
	25
	26	#include <linux/module.h>
	27	#include <linux/init.h>
	28	#include <linux/slab.h>
	29	#include <linux/i2c.h>
	30	#include <linux/hwmon.h>
	31	#include <linux/hwmon-sysfs.h>
	32	#include <linux/err.h>
	33	#include <linux/sysfs.h>
	34	#include <linux/mutex.h>
dcd8f392	35	#include <linux/jiffies.h>
dac6831e KT	36
	37	#define THERMAL_PID_REG 0xfd
	38	#define THERMAL_SMSC_ID_REG 0xfe
	39	#define THERMAL_REVISION_REG 0xff
	40
be7f5c4d JG	41	enum emc1403_chip { emc1402, emc1403, emc1404 };
be7f5c4d JG	42
dac6831e	43	struct thermal_data {
454aee17	44	struct i2c_client *client;
be7f5c4d	45	const struct attribute_group *groups[4];
dac6831e	46	struct mutex mutex;
4bebced8 GR	47	/*
	48	* Cache the hyst value so we don't keep re-reading it. In theory
	49	* we could cache it forever as nobody else should be writing it.
	50	*/
dac6831e KT	51	u8 cached_hyst;
	52	unsigned long hyst_valid;
	53	};
	54
	55	static ssize_t show_temp(struct device *dev,
	56	struct device_attribute attr, char buf)
	57	{
dac6831e	58	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
454aee17 GR	59	struct thermal_data *data = dev_get_drvdata(dev);
454aee17 GR	60	int retval;
dac6831e	61
454aee17	62	retval = i2c_smbus_read_byte_data(data->client, sda->index);
dac6831e KT	63	if (retval < 0)
	64	return retval;
	65	return sprintf(buf, "%d000\n", retval);
	66	}
	67
	68	static ssize_t show_bit(struct device *dev,
	69	struct device_attribute attr, char buf)
	70	{
dac6831e	71	struct sensor_device_attribute_2 *sda = to_sensor_dev_attr_2(attr);
454aee17 GR	72	struct thermal_data *data = dev_get_drvdata(dev);
454aee17 GR	73	int retval;
dac6831e	74
454aee17	75	retval = i2c_smbus_read_byte_data(data->client, sda->nr);
dac6831e KT	76	if (retval < 0)
dac6831e KT	77	return retval;
454aee17	78	return sprintf(buf, "%d\n", !!(retval & sda->index));
dac6831e KT	79	}
	80
	81	static ssize_t store_temp(struct device *dev,
	82	struct device_attribute attr, const char buf, size_t count)
	83	{
	84	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
454aee17	85	struct thermal_data *data = dev_get_drvdata(dev);
dac6831e KT	86	unsigned long val;
	87	int retval;
	88
179c4fdb	89	if (kstrtoul(buf, 10, &val))
dac6831e	90	return -EINVAL;
454aee17	91	retval = i2c_smbus_write_byte_data(data->client, sda->index,
dac6831e KT	92	DIV_ROUND_CLOSEST(val, 1000));
	93	if (retval < 0)
	94	return retval;
	95	return count;
	96	}
	97
960f12f4 AC	98	static ssize_t store_bit(struct device *dev,
	99	struct device_attribute attr, const char buf, size_t count)
	100	{
960f12f4	101	struct sensor_device_attribute_2 *sda = to_sensor_dev_attr_2(attr);
454aee17 GR	102	struct thermal_data *data = dev_get_drvdata(dev);
454aee17 GR	103	struct i2c_client *client = data->client;
960f12f4 AC	104	unsigned long val;
	105	int retval;
	106
179c4fdb	107	if (kstrtoul(buf, 10, &val))
960f12f4 AC	108	return -EINVAL;
	109
	110	mutex_lock(&data->mutex);
	111	retval = i2c_smbus_read_byte_data(client, sda->nr);
	112	if (retval < 0)
	113	goto fail;
	114
	115	retval &= ~sda->index;
	116	if (val)
	117	retval \|= sda->index;
	118
	119	retval = i2c_smbus_write_byte_data(client, sda->index, retval);
	120	if (retval == 0)
	121	retval = count;
	122	fail:
	123	mutex_unlock(&data->mutex);
	124	return retval;
	125	}
	126
dac6831e KT	127	static ssize_t show_hyst(struct device *dev,
	128	struct device_attribute attr, char buf)
	129	{
dac6831e	130	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
454aee17 GR	131	struct thermal_data *data = dev_get_drvdata(dev);
454aee17 GR	132	struct i2c_client *client = data->client;
dac6831e KT	133	int retval;
	134	int hyst;
	135
	136	retval = i2c_smbus_read_byte_data(client, sda->index);
	137	if (retval < 0)
	138	return retval;
	139
	140	if (time_after(jiffies, data->hyst_valid)) {
	141	hyst = i2c_smbus_read_byte_data(client, 0x21);
	142	if (hyst < 0)
	143	return retval;
	144	data->cached_hyst = hyst;
	145	data->hyst_valid = jiffies + HZ;
	146	}
	147	return sprintf(buf, "%d000\n", retval - data->cached_hyst);
	148	}
	149
	150	static ssize_t store_hyst(struct device *dev,
	151	struct device_attribute attr, const char buf, size_t count)
	152	{
dac6831e	153	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
454aee17 GR	154	struct thermal_data *data = dev_get_drvdata(dev);
454aee17 GR	155	struct i2c_client *client = data->client;
dac6831e KT	156	int retval;
	157	int hyst;
	158	unsigned long val;
	159
179c4fdb	160	if (kstrtoul(buf, 10, &val))
dac6831e KT	161	return -EINVAL;
	162
	163	mutex_lock(&data->mutex);
	164	retval = i2c_smbus_read_byte_data(client, sda->index);
	165	if (retval < 0)
	166	goto fail;
	167
17c048fc	168	hyst = retval * 1000 - val;
dac6831e KT	169	hyst = DIV_ROUND_CLOSEST(hyst, 1000);
	170	if (hyst < 0 \|\| hyst > 255) {
	171	retval = -ERANGE;
	172	goto fail;
	173	}
	174
	175	retval = i2c_smbus_write_byte_data(client, 0x21, hyst);
	176	if (retval == 0) {
	177	retval = count;
	178	data->cached_hyst = hyst;
	179	data->hyst_valid = jiffies + HZ;
	180	}
	181	fail:
	182	mutex_unlock(&data->mutex);
	183	return retval;
	184	}
	185
	186	/*
	187	* Sensors. We pass the actual i2c register to the methods.
	188	*/
	189
	190	static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO \| S_IWUSR,
	191	show_temp, store_temp, 0x06);
	192	static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO \| S_IWUSR,
	193	show_temp, store_temp, 0x05);
	194	static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO \| S_IWUSR,
	195	show_temp, store_temp, 0x20);
	196	static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0x00);
	197	static SENSOR_DEVICE_ATTR_2(temp1_min_alarm, S_IRUGO,
	198	show_bit, NULL, 0x36, 0x01);
	199	static SENSOR_DEVICE_ATTR_2(temp1_max_alarm, S_IRUGO,
	200	show_bit, NULL, 0x35, 0x01);
	201	static SENSOR_DEVICE_ATTR_2(temp1_crit_alarm, S_IRUGO,
	202	show_bit, NULL, 0x37, 0x01);
	203	static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO \| S_IWUSR,
	204	show_hyst, store_hyst, 0x20);
	205
	206	static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO \| S_IWUSR,
	207	show_temp, store_temp, 0x08);
	208	static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO \| S_IWUSR,
	209	show_temp, store_temp, 0x07);
	210	static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO \| S_IWUSR,
	211	show_temp, store_temp, 0x19);
	212	static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 0x01);
	213	static SENSOR_DEVICE_ATTR_2(temp2_min_alarm, S_IRUGO,
	214	show_bit, NULL, 0x36, 0x02);
	215	static SENSOR_DEVICE_ATTR_2(temp2_max_alarm, S_IRUGO,
	216	show_bit, NULL, 0x35, 0x02);
	217	static SENSOR_DEVICE_ATTR_2(temp2_crit_alarm, S_IRUGO,
	218	show_bit, NULL, 0x37, 0x02);
	219	static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO \| S_IWUSR,
	220	show_hyst, store_hyst, 0x19);
	221
	222	static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO \| S_IWUSR,
	223	show_temp, store_temp, 0x16);
	224	static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO \| S_IWUSR,
	225	show_temp, store_temp, 0x15);
	226	static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO \| S_IWUSR,
	227	show_temp, store_temp, 0x1A);
	228	static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 0x23);
	229	static SENSOR_DEVICE_ATTR_2(temp3_min_alarm, S_IRUGO,
	230	show_bit, NULL, 0x36, 0x04);
	231	static SENSOR_DEVICE_ATTR_2(temp3_max_alarm, S_IRUGO,
	232	show_bit, NULL, 0x35, 0x04);
233	static SENSOR_DEVICE_ATTR_2(temp3_crit_alarm, S_IRUGO,
234	show_bit, NULL, 0x37, 0x04);
235	static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO \| S_IWUSR,
236	show_hyst, store_hyst, 0x1A);
237
0011ddfe GR	238	static SENSOR_DEVICE_ATTR(temp4_min, S_IRUGO \| S_IWUSR,
	239	show_temp, store_temp, 0x2D);
	240	static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO \| S_IWUSR,
	241	show_temp, store_temp, 0x2C);
	242	static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO \| S_IWUSR,
	243	show_temp, store_temp, 0x30);
	244	static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 0x2A);
	245	static SENSOR_DEVICE_ATTR_2(temp4_min_alarm, S_IRUGO,
	246	show_bit, NULL, 0x36, 0x08);
	247	static SENSOR_DEVICE_ATTR_2(temp4_max_alarm, S_IRUGO,
	248	show_bit, NULL, 0x35, 0x08);
	249	static SENSOR_DEVICE_ATTR_2(temp4_crit_alarm, S_IRUGO,
	250	show_bit, NULL, 0x37, 0x08);
	251	static SENSOR_DEVICE_ATTR(temp4_crit_hyst, S_IRUGO \| S_IWUSR,
	252	show_hyst, store_hyst, 0x30);
	253
960f12f4 AC	254	static SENSOR_DEVICE_ATTR_2(power_state, S_IRUGO \| S_IWUSR,
	255	show_bit, store_bit, 0x03, 0x40);
	256
be7f5c4d	257	static struct attribute *emc1402_attrs[] = {
dac6831e KT	258	&sensor_dev_attr_temp1_min.dev_attr.attr,
	259	&sensor_dev_attr_temp1_max.dev_attr.attr,
	260	&sensor_dev_attr_temp1_crit.dev_attr.attr,
	261	&sensor_dev_attr_temp1_input.dev_attr.attr,
dac6831e	262	&sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
be7f5c4d	263
dac6831e KT	264	&sensor_dev_attr_temp2_min.dev_attr.attr,
	265	&sensor_dev_attr_temp2_max.dev_attr.attr,
	266	&sensor_dev_attr_temp2_crit.dev_attr.attr,
	267	&sensor_dev_attr_temp2_input.dev_attr.attr,
be7f5c4d JG	268	&sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
	269
	270	&sensor_dev_attr_power_state.dev_attr.attr,
	271	NULL
	272	};
	273
	274	static const struct attribute_group emc1402_group = {
	275	.attrs = emc1402_attrs,
	276	};
	277
	278	static struct attribute *emc1403_attrs[] = {
	279	&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
	280	&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
	281	&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
	282
dac6831e KT	283	&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
	284	&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
	285	&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
be7f5c4d	286
dac6831e KT	287	&sensor_dev_attr_temp3_min.dev_attr.attr,
	288	&sensor_dev_attr_temp3_max.dev_attr.attr,
	289	&sensor_dev_attr_temp3_crit.dev_attr.attr,
	290	&sensor_dev_attr_temp3_input.dev_attr.attr,
	291	&sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
	292	&sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
	293	&sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
	294	&sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
	295	NULL
	296	};
0011ddfe GR	297
	298	static const struct attribute_group emc1403_group = {
	299	.attrs = emc1403_attrs,
	300	};
	301
	302	static struct attribute *emc1404_attrs[] = {
	303	&sensor_dev_attr_temp4_min.dev_attr.attr,
	304	&sensor_dev_attr_temp4_max.dev_attr.attr,
	305	&sensor_dev_attr_temp4_crit.dev_attr.attr,
	306	&sensor_dev_attr_temp4_input.dev_attr.attr,
	307	&sensor_dev_attr_temp4_min_alarm.dev_attr.attr,
	308	&sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
	309	&sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
	310	&sensor_dev_attr_temp4_crit_hyst.dev_attr.attr,
	311	NULL
	312	};
	313
	314	static const struct attribute_group emc1404_group = {
	315	.attrs = emc1404_attrs,
	316	};
dac6831e KT	317
	318	static int emc1403_detect(struct i2c_client *client,
	319	struct i2c_board_info *info)
	320	{
	321	int id;
7a1b76f2	322	/* Check if thermal chip is SMSC and EMC1403 or EMC1423 */
dac6831e KT	323
	324	id = i2c_smbus_read_byte_data(client, THERMAL_SMSC_ID_REG);
	325	if (id != 0x5d)
	326	return -ENODEV;
	327
7a1b76f2 JL	328	id = i2c_smbus_read_byte_data(client, THERMAL_PID_REG);
7a1b76f2 JL	329	switch (id) {
be7f5c4d JG	330	case 0x20:
	331	strlcpy(info->type, "emc1402", I2C_NAME_SIZE);
	332	break;
7a1b76f2 JL	333	case 0x21:
	334	strlcpy(info->type, "emc1403", I2C_NAME_SIZE);
	335	break;
be7f5c4d JG	336	case 0x22:
	337	strlcpy(info->type, "emc1422", I2C_NAME_SIZE);
	338	break;
7a1b76f2 JL	339	case 0x23:
	340	strlcpy(info->type, "emc1423", I2C_NAME_SIZE);
	341	break;
0011ddfe GR	342	case 0x25:
	343	strlcpy(info->type, "emc1404", I2C_NAME_SIZE);
	344	break;
	345	case 0x27:
	346	strlcpy(info->type, "emc1424", I2C_NAME_SIZE);
	347	break;
7a1b76f2	348	default:
dac6831e	349	return -ENODEV;
7a1b76f2	350	}
dac6831e KT	351
dac6831e KT	352	id = i2c_smbus_read_byte_data(client, THERMAL_REVISION_REG);
3a18e139	353	if (id < 0x01 \|\| id > 0x04)
dac6831e KT	354	return -ENODEV;
dac6831e KT	355
dac6831e KT	356	return 0;
	357	}
	358
	359	static int emc1403_probe(struct i2c_client *client,
	360	const struct i2c_device_id *id)
	361	{
dac6831e	362	struct thermal_data *data;
454aee17	363	struct device *hwmon_dev;
dac6831e	364
7b52eefe GR	365	data = devm_kzalloc(&client->dev, sizeof(struct thermal_data),
	366	GFP_KERNEL);
	367	if (data == NULL)
dac6831e	368	return -ENOMEM;
dac6831e	369
454aee17	370	data->client = client;
dac6831e KT	371	mutex_init(&data->mutex);
	372	data->hyst_valid = jiffies - 1; /* Expired */
	373
be7f5c4d JG	374	switch (id->driver_data) {
	375	case emc1404:
	376	data->groups[2] = &emc1404_group;
	377	case emc1403:
	378	data->groups[1] = &emc1403_group;
	379	case emc1402:
	380	data->groups[0] = &emc1402_group;
	381	}
0011ddfe	382
8759f904 JD	383	hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
	384	client->name, data,
	385	data->groups);
454aee17 GR	386	if (IS_ERR(hwmon_dev))
454aee17 GR	387	return PTR_ERR(hwmon_dev);
dac6831e	388
0011ddfe	389	dev_info(&client->dev, "%s Thermal chip found\n", id->name);
dac6831e KT	390	return 0;
	391	}
	392
	393	static const unsigned short emc1403_address_list[] = {
be7f5c4d	394	0x18, 0x1c, 0x29, 0x4c, 0x4d, 0x5c, I2C_CLIENT_END
dac6831e KT	395	};
dac6831e KT	396
be7f5c4d	397	/* Last digit of chip name indicates number of channels */
dac6831e	398	static const struct i2c_device_id emc1403_idtable[] = {
be7f5c4d JG	399	{ "emc1402", emc1402 },
	400	{ "emc1403", emc1403 },
	401	{ "emc1404", emc1404 },
	402	{ "emc1422", emc1402 },
	403	{ "emc1423", emc1403 },
	404	{ "emc1424", emc1404 },
dac6831e KT	405	{ }
	406	};
	407	MODULE_DEVICE_TABLE(i2c, emc1403_idtable);
	408
	409	static struct i2c_driver sensor_emc1403 = {
	410	.class = I2C_CLASS_HWMON,
	411	.driver = {
	412	.name = "emc1403",
	413	},
	414	.detect = emc1403_detect,
	415	.probe = emc1403_probe,
dac6831e KT	416	.id_table = emc1403_idtable,
	417	.address_list = emc1403_address_list,
	418	};
	419
f0967eea	420	module_i2c_driver(sensor_emc1403);
dac6831e KT	421
	422	MODULE_AUTHOR("Kalhan Trisal <kalhan.trisal@intel.com");
	423	MODULE_DESCRIPTION("emc1403 Thermal Driver");
	424	MODULE_LICENSE("GPL v2");