[mirror_ubuntu-bionic-kernel.git] / drivers / hwmon / thmc50.c

/*
 * thmc50.c - Part of lm_sensors, Linux kernel modules for hardware
 *	      monitoring
 * Copyright (C) 2007 Krzysztof Helt <krzysztof.h1@wp.pl>
 * Based on 2.4 driver by Frodo Looijaard <frodol@dds.nl> and
 * Philip Edelbrock <phil@netroedge.com>
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#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/mutex.h>
#include <linux/jiffies.h>

MODULE_LICENSE("GPL");

/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };

/* Insmod parameters */
enum chips { thmc50, adm1022 };

static unsigned short adm1022_temp3[16];
static unsigned int adm1022_temp3_num;
module_param_array(adm1022_temp3, ushort, &adm1022_temp3_num, 0);
MODULE_PARM_DESC(adm1022_temp3,
		 "List of adapter,address pairs to enable 3rd temperature (ADM1022 only)");

/* Many THMC50 constants specified below */

/* The THMC50 registers */
#define THMC50_REG_CONF				0x40
#define THMC50_REG_COMPANY_ID			0x3E
#define THMC50_REG_DIE_CODE			0x3F
#define THMC50_REG_ANALOG_OUT			0x19
/*
 * The mirror status register cannot be used as
 * reading it does not clear alarms.
 */
#define THMC50_REG_INTR				0x41

static const u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 };
static const u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C };
static const u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B };
static const u8 THMC50_REG_TEMP_CRITICAL[] = { 0x13, 0x14, 0x14 };
static const u8 THMC50_REG_TEMP_DEFAULT[] = { 0x17, 0x18, 0x18 };

#define THMC50_REG_CONF_nFANOFF			0x20
#define THMC50_REG_CONF_PROGRAMMED		0x08

/* Each client has this additional data */
struct thmc50_data {
	struct i2c_client *client;
	const struct attribute_group *groups[3];

	struct mutex update_lock;
	enum chips type;
	unsigned long last_updated;	/* In jiffies */
	char has_temp3;		/* !=0 if it is ADM1022 in temp3 mode */
	char valid;		/* !=0 if following fields are valid */

	/* Register values */
	s8 temp_input[3];
	s8 temp_max[3];
	s8 temp_min[3];
	s8 temp_critical[3];
	u8 analog_out;
	u8 alarms;
};

static struct thmc50_data *thmc50_update_device(struct device *dev)
{
	struct thmc50_data *data = dev_get_drvdata(dev);
	struct i2c_client *client = data->client;
	int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0);

	mutex_lock(&data->update_lock);

	if (time_after(jiffies, data->last_updated + timeout)
	    || !data->valid) {

		int temps = data->has_temp3 ? 3 : 2;
		int i;
		int prog = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);

		prog &= THMC50_REG_CONF_PROGRAMMED;

		for (i = 0; i < temps; i++) {
			data->temp_input[i] = i2c_smbus_read_byte_data(client,
						THMC50_REG_TEMP[i]);
			data->temp_max[i] = i2c_smbus_read_byte_data(client,
						THMC50_REG_TEMP_MAX[i]);
			data->temp_min[i] = i2c_smbus_read_byte_data(client,
						THMC50_REG_TEMP_MIN[i]);
			data->temp_critical[i] =
				i2c_smbus_read_byte_data(client,
					prog ? THMC50_REG_TEMP_CRITICAL[i]
					     : THMC50_REG_TEMP_DEFAULT[i]);
		}
		data->analog_out =
		    i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT);
		data->alarms =
		    i2c_smbus_read_byte_data(client, THMC50_REG_INTR);
		data->last_updated = jiffies;
		data->valid = 1;
	}

	mutex_unlock(&data->update_lock);

	return data;
}

static ssize_t show_analog_out(struct device *dev,
			       struct device_attribute *attr, char *buf)
{
	struct thmc50_data *data = thmc50_update_device(dev);
	return sprintf(buf, "%d\n", data->analog_out);
}

static ssize_t set_analog_out(struct device *dev,
			      struct device_attribute *attr,
			      const char *buf, size_t count)
{
	struct thmc50_data *data = dev_get_drvdata(dev);
	struct i2c_client *client = data->client;
	int config;
	unsigned long tmp;
	int err;

	err = kstrtoul(buf, 10, &tmp);
	if (err)
		return err;

	mutex_lock(&data->update_lock);
	data->analog_out = clamp_val(tmp, 0, 255);
	i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
				  data->analog_out);

	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	if (data->analog_out == 0)
		config &= ~THMC50_REG_CONF_nFANOFF;
	else
		config |= THMC50_REG_CONF_nFANOFF;
	i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);

	mutex_unlock(&data->update_lock);
	return count;
}

/* There is only one PWM mode = DC */
static ssize_t show_pwm_mode(struct device *dev, struct device_attribute *attr,
			     char *buf)
{
	return sprintf(buf, "0\n");
}

/* Temperatures */
static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	int nr = to_sensor_dev_attr(attr)->index;
	struct thmc50_data *data = thmc50_update_device(dev);
	return sprintf(buf, "%d\n", data->temp_input[nr] * 1000);
}

static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
			     char *buf)
{
	int nr = to_sensor_dev_attr(attr)->index;
	struct thmc50_data *data = thmc50_update_device(dev);
	return sprintf(buf, "%d\n", data->temp_min[nr] * 1000);
}

static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
			    const char *buf, size_t count)
{
	int nr = to_sensor_dev_attr(attr)->index;
	struct thmc50_data *data = dev_get_drvdata(dev);
	struct i2c_client *client = data->client;
	long val;
	int err;

	err = kstrtol(buf, 10, &val);
	if (err)
		return err;

	mutex_lock(&data->update_lock);
	data->temp_min[nr] = clamp_val(val / 1000, -128, 127);
	i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr],
				  data->temp_min[nr]);
	mutex_unlock(&data->update_lock);
	return count;
}

static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
			     char *buf)
{
	int nr = to_sensor_dev_attr(attr)->index;
	struct thmc50_data *data = thmc50_update_device(dev);
	return sprintf(buf, "%d\n", data->temp_max[nr] * 1000);
}

static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
			    const char *buf, size_t count)
{
	int nr = to_sensor_dev_attr(attr)->index;
	struct thmc50_data *data = dev_get_drvdata(dev);
	struct i2c_client *client = data->client;
	long val;
	int err;

	err = kstrtol(buf, 10, &val);
	if (err)
		return err;

	mutex_lock(&data->update_lock);
	data->temp_max[nr] = clamp_val(val / 1000, -128, 127);
	i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr],
				  data->temp_max[nr]);
	mutex_unlock(&data->update_lock);
	return count;
}

static ssize_t show_temp_critical(struct device *dev,
				  struct device_attribute *attr,
				  char *buf)
{
	int nr = to_sensor_dev_attr(attr)->index;
	struct thmc50_data *data = thmc50_update_device(dev);
	return sprintf(buf, "%d\n", data->temp_critical[nr] * 1000);
}

static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
			  char *buf)
{
	int index = to_sensor_dev_attr(attr)->index;
	struct thmc50_data *data = thmc50_update_device(dev);

	return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
}

#define temp_reg(offset)						\
static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp,	\
			NULL, offset - 1);				\
static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR,	\
			show_temp_min, set_temp_min, offset - 1);	\
static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,	\
			show_temp_max, set_temp_max, offset - 1);	\
static SENSOR_DEVICE_ATTR(temp##offset##_crit, S_IRUGO,			\
			show_temp_critical, NULL, offset - 1);

temp_reg(1);
temp_reg(2);
temp_reg(3);

static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1);
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 7);
static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2);

static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_analog_out,
			  set_analog_out, 0);
static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);

static struct attribute *thmc50_attributes[] = {
	&sensor_dev_attr_temp1_max.dev_attr.attr,
	&sensor_dev_attr_temp1_min.dev_attr.attr,
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	&sensor_dev_attr_temp1_crit.dev_attr.attr,
	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
	&sensor_dev_attr_temp2_max.dev_attr.attr,
	&sensor_dev_attr_temp2_min.dev_attr.attr,
	&sensor_dev_attr_temp2_input.dev_attr.attr,
	&sensor_dev_attr_temp2_crit.dev_attr.attr,
	&sensor_dev_attr_temp2_alarm.dev_attr.attr,
	&sensor_dev_attr_temp2_fault.dev_attr.attr,
	&sensor_dev_attr_pwm1.dev_attr.attr,
	&sensor_dev_attr_pwm1_mode.dev_attr.attr,
	NULL
};

static const struct attribute_group thmc50_group = {
	.attrs = thmc50_attributes,
};

/* for ADM1022 3rd temperature mode */
static struct attribute *temp3_attributes[] = {
	&sensor_dev_attr_temp3_max.dev_attr.attr,
	&sensor_dev_attr_temp3_min.dev_attr.attr,
	&sensor_dev_attr_temp3_input.dev_attr.attr,
	&sensor_dev_attr_temp3_crit.dev_attr.attr,
	&sensor_dev_attr_temp3_alarm.dev_attr.attr,
	&sensor_dev_attr_temp3_fault.dev_attr.attr,
	NULL
};

static const struct attribute_group temp3_group = {
	.attrs = temp3_attributes,
};

/* Return 0 if detection is successful, -ENODEV otherwise */
static int thmc50_detect(struct i2c_client *client,
			 struct i2c_board_info *info)
{
	unsigned company;
	unsigned revision;
	unsigned config;
	struct i2c_adapter *adapter = client->adapter;
	const char *type_name;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
		pr_debug("thmc50: detect failed, smbus byte data not supported!\n");
		return -ENODEV;
	}

	pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n",
		 client->addr, i2c_adapter_id(client->adapter));

	company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID);
	revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE);
	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	if (revision < 0xc0 || (config & 0x10))
		return -ENODEV;

	if (company == 0x41) {
		int id = i2c_adapter_id(client->adapter);
		int i;

		type_name = "adm1022";
		for (i = 0; i + 1 < adm1022_temp3_num; i += 2)
			if (adm1022_temp3[i] == id &&
			    adm1022_temp3[i + 1] == client->addr) {
				/* enable 2nd remote temp */
				config |= (1 << 7);
				i2c_smbus_write_byte_data(client,
							  THMC50_REG_CONF,
							  config);
				break;
			}
	} else if (company == 0x49) {
		type_name = "thmc50";
	} else {
		pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n");
		return -ENODEV;
	}

	pr_debug("thmc50: Detected %s (version %x, revision %x)\n",
		 type_name, (revision >> 4) - 0xc, revision & 0xf);

	strlcpy(info->type, type_name, I2C_NAME_SIZE);

	return 0;
}

static void thmc50_init_client(struct thmc50_data *data)
{
	struct i2c_client *client = data->client;
	int config;

	data->analog_out = i2c_smbus_read_byte_data(client,
						    THMC50_REG_ANALOG_OUT);
	/* set up to at least 1 */
	if (data->analog_out == 0) {
		data->analog_out = 1;
		i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
					  data->analog_out);
	}
	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	config |= 0x1;	/* start the chip if it is in standby mode */
	if (data->type == adm1022 && (config & (1 << 7)))
		data->has_temp3 = 1;
	i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
}

static int thmc50_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct device *dev = &client->dev;
	struct thmc50_data *data;
	struct device *hwmon_dev;
	int idx = 0;

	data = devm_kzalloc(dev, sizeof(struct thmc50_data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->client = client;
	data->type = id->driver_data;
	mutex_init(&data->update_lock);

	thmc50_init_client(data);

	/* sysfs hooks */
	data->groups[idx++] = &thmc50_group;

	/* Register additional ADM1022 sysfs hooks */
	if (data->has_temp3)
		data->groups[idx++] = &temp3_group;

	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
							   data, data->groups);
	return PTR_ERR_OR_ZERO(hwmon_dev);
}

static const struct i2c_device_id thmc50_id[] = {
	{ "adm1022", adm1022 },
	{ "thmc50", thmc50 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, thmc50_id);

static struct i2c_driver thmc50_driver = {
	.class = I2C_CLASS_HWMON,
	.driver = {
		.name = "thmc50",
	},
	.probe = thmc50_probe,
	.id_table = thmc50_id,
	.detect = thmc50_detect,
	.address_list = normal_i2c,
};

module_i2c_driver(thmc50_driver);

MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>");
MODULE_DESCRIPTION("THMC50 driver");
Commit	Line	Data
add77c64	1	/*
4d387df7 GR	2	* thmc50.c - Part of lm_sensors, Linux kernel modules for hardware
	3	* monitoring
	4	* Copyright (C) 2007 Krzysztof Helt <krzysztof.h1@wp.pl>
	5	* Based on 2.4 driver by Frodo Looijaard <frodol@dds.nl> and
	6	* Philip Edelbrock <phil@netroedge.com>
	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; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	21	*/
add77c64 KH	22
	23	#include <linux/module.h>
	24	#include <linux/init.h>
	25	#include <linux/slab.h>
	26	#include <linux/i2c.h>
	27	#include <linux/hwmon.h>
	28	#include <linux/hwmon-sysfs.h>
	29	#include <linux/err.h>
	30	#include <linux/mutex.h>
dcd8f392	31	#include <linux/jiffies.h>
add77c64 KH	32
	33	MODULE_LICENSE("GPL");
	34
	35	/* Addresses to scan */
25e9c86d	36	static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
add77c64 KH	37
add77c64 KH	38	/* Insmod parameters */
e5e9f44c	39	enum chips { thmc50, adm1022 };
f95f0b4c JD	40
	41	static unsigned short adm1022_temp3[16];
	42	static unsigned int adm1022_temp3_num;
	43	module_param_array(adm1022_temp3, ushort, &adm1022_temp3_num, 0);
b55f3757 GR	44	MODULE_PARM_DESC(adm1022_temp3,
b55f3757 GR	45	"List of adapter,address pairs to enable 3rd temperature (ADM1022 only)");
add77c64 KH	46
	47	/* Many THMC50 constants specified below */
	48
	49	/* The THMC50 registers */
	50	#define THMC50_REG_CONF 0x40
	51	#define THMC50_REG_COMPANY_ID 0x3E
	52	#define THMC50_REG_DIE_CODE 0x3F
	53	#define THMC50_REG_ANALOG_OUT 0x19
dcf3b5fb	54	/*
bba891c2 KH	55	* The mirror status register cannot be used as
bba891c2 KH	56	* reading it does not clear alarms.
dcf3b5fb	57	*/
bba891c2	58	#define THMC50_REG_INTR 0x41
add77c64	59
5910a9b2 TK	60	static const u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 };
	61	static const u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C };
	62	static const u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B };
84f768c1 KH	63	static const u8 THMC50_REG_TEMP_CRITICAL[] = { 0x13, 0x14, 0x14 };
84f768c1 KH	64	static const u8 THMC50_REG_TEMP_DEFAULT[] = { 0x17, 0x18, 0x18 };
add77c64 KH	65
add77c64 KH	66	#define THMC50_REG_CONF_nFANOFF 0x20
84f768c1	67	#define THMC50_REG_CONF_PROGRAMMED 0x08
add77c64 KH	68
	69	/* Each client has this additional data */
	70	struct thmc50_data {
86fd260e AL	71	struct i2c_client *client;
86fd260e AL	72	const struct attribute_group *groups[3];
add77c64 KH	73
	74	struct mutex update_lock;
	75	enum chips type;
	76	unsigned long last_updated; /* In jiffies */
	77	char has_temp3; /* !=0 if it is ADM1022 in temp3 mode */
	78	char valid; /* !=0 if following fields are valid */
	79
	80	/* Register values */
	81	s8 temp_input[3];
	82	s8 temp_max[3];
	83	s8 temp_min[3];
84f768c1	84	s8 temp_critical[3];
add77c64	85	u8 analog_out;
dcf3b5fb	86	u8 alarms;
add77c64 KH	87	};
add77c64 KH	88
9b38a66e AL	89	static struct thmc50_data thmc50_update_device(struct device dev)
9b38a66e AL	90	{
86fd260e AL	91	struct thmc50_data *data = dev_get_drvdata(dev);
86fd260e AL	92	struct i2c_client *client = data->client;
9b38a66e	93	int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0);
add77c64	94
9b38a66e	95	mutex_lock(&data->update_lock);
ccf37488	96
9b38a66e AL	97	if (time_after(jiffies, data->last_updated + timeout)
	98	\|\| !data->valid) {
	99
	100	int temps = data->has_temp3 ? 3 : 2;
	101	int i;
	102	int prog = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	103
	104	prog &= THMC50_REG_CONF_PROGRAMMED;
	105
	106	for (i = 0; i < temps; i++) {
	107	data->temp_input[i] = i2c_smbus_read_byte_data(client,
	108	THMC50_REG_TEMP[i]);
	109	data->temp_max[i] = i2c_smbus_read_byte_data(client,
	110	THMC50_REG_TEMP_MAX[i]);
	111	data->temp_min[i] = i2c_smbus_read_byte_data(client,
	112	THMC50_REG_TEMP_MIN[i]);
	113	data->temp_critical[i] =
	114	i2c_smbus_read_byte_data(client,
	115	prog ? THMC50_REG_TEMP_CRITICAL[i]
	116	: THMC50_REG_TEMP_DEFAULT[i]);
	117	}
	118	data->analog_out =
	119	i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT);
	120	data->alarms =
	121	i2c_smbus_read_byte_data(client, THMC50_REG_INTR);
	122	data->last_updated = jiffies;
	123	data->valid = 1;
	124	}
	125
	126	mutex_unlock(&data->update_lock);
	127
	128	return data;
	129	}
add77c64 KH	130
	131	static ssize_t show_analog_out(struct device *dev,
	132	struct device_attribute attr, char buf)
	133	{
	134	struct thmc50_data *data = thmc50_update_device(dev);
	135	return sprintf(buf, "%d\n", data->analog_out);
	136	}
	137
	138	static ssize_t set_analog_out(struct device *dev,
	139	struct device_attribute *attr,
	140	const char *buf, size_t count)
	141	{
86fd260e AL	142	struct thmc50_data *data = dev_get_drvdata(dev);
86fd260e AL	143	struct i2c_client *client = data->client;
add77c64	144	int config;
4d387df7 GR	145	unsigned long tmp;
	146	int err;
	147
	148	err = kstrtoul(buf, 10, &tmp);
	149	if (err)
	150	return err;
add77c64 KH	151
add77c64 KH	152	mutex_lock(&data->update_lock);
2a844c14	153	data->analog_out = clamp_val(tmp, 0, 255);
add77c64 KH	154	i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
	155	data->analog_out);
	156
	157	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	158	if (data->analog_out == 0)
	159	config &= ~THMC50_REG_CONF_nFANOFF;
	160	else
	161	config \|= THMC50_REG_CONF_nFANOFF;
	162	i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
	163
	164	mutex_unlock(&data->update_lock);
	165	return count;
	166	}
	167
	168	/* There is only one PWM mode = DC */
	169	static ssize_t show_pwm_mode(struct device dev, struct device_attribute attr,
	170	char *buf)
	171	{
	172	return sprintf(buf, "0\n");
	173	}
	174
	175	/* Temperatures */
	176	static ssize_t show_temp(struct device dev, struct device_attribute attr,
	177	char *buf)
	178	{
	179	int nr = to_sensor_dev_attr(attr)->index;
	180	struct thmc50_data *data = thmc50_update_device(dev);
	181	return sprintf(buf, "%d\n", data->temp_input[nr] * 1000);
	182	}
	183
	184	static ssize_t show_temp_min(struct device dev, struct device_attribute attr,
	185	char *buf)
	186	{
	187	int nr = to_sensor_dev_attr(attr)->index;
	188	struct thmc50_data *data = thmc50_update_device(dev);
	189	return sprintf(buf, "%d\n", data->temp_min[nr] * 1000);
	190	}
	191
	192	static ssize_t set_temp_min(struct device dev, struct device_attribute attr,
	193	const char *buf, size_t count)
	194	{
	195	int nr = to_sensor_dev_attr(attr)->index;
86fd260e AL	196	struct thmc50_data *data = dev_get_drvdata(dev);
86fd260e AL	197	struct i2c_client *client = data->client;
4d387df7 GR	198	long val;
	199	int err;
	200
	201	err = kstrtol(buf, 10, &val);
	202	if (err)
	203	return err;
add77c64 KH	204
add77c64 KH	205	mutex_lock(&data->update_lock);
2a844c14	206	data->temp_min[nr] = clamp_val(val / 1000, -128, 127);
add77c64 KH	207	i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr],
	208	data->temp_min[nr]);
	209	mutex_unlock(&data->update_lock);
	210	return count;
	211	}
	212
	213	static ssize_t show_temp_max(struct device dev, struct device_attribute attr,
	214	char *buf)
	215	{
	216	int nr = to_sensor_dev_attr(attr)->index;
	217	struct thmc50_data *data = thmc50_update_device(dev);
	218	return sprintf(buf, "%d\n", data->temp_max[nr] * 1000);
	219	}
	220
	221	static ssize_t set_temp_max(struct device dev, struct device_attribute attr,
	222	const char *buf, size_t count)
	223	{
	224	int nr = to_sensor_dev_attr(attr)->index;
86fd260e AL	225	struct thmc50_data *data = dev_get_drvdata(dev);
86fd260e AL	226	struct i2c_client *client = data->client;
4d387df7 GR	227	long val;
	228	int err;
	229
	230	err = kstrtol(buf, 10, &val);
	231	if (err)
	232	return err;
add77c64 KH	233
add77c64 KH	234	mutex_lock(&data->update_lock);
2a844c14	235	data->temp_max[nr] = clamp_val(val / 1000, -128, 127);
add77c64 KH	236	i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr],
	237	data->temp_max[nr]);
	238	mutex_unlock(&data->update_lock);
	239	return count;
	240	}
	241
84f768c1 KH	242	static ssize_t show_temp_critical(struct device *dev,
	243	struct device_attribute *attr,
	244	char *buf)
	245	{
	246	int nr = to_sensor_dev_attr(attr)->index;
	247	struct thmc50_data *data = thmc50_update_device(dev);
	248	return sprintf(buf, "%d\n", data->temp_critical[nr] * 1000);
	249	}
	250
dcf3b5fb KH	251	static ssize_t show_alarm(struct device dev, struct device_attribute attr,
	252	char *buf)
	253	{
	254	int index = to_sensor_dev_attr(attr)->index;
	255	struct thmc50_data *data = thmc50_update_device(dev);
	256
	257	return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
	258	}
	259
add77c64 KH	260	#define temp_reg(offset) \
	261	static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp, \
	262	NULL, offset - 1); \
	263	static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO \| S_IWUSR, \
	264	show_temp_min, set_temp_min, offset - 1); \
	265	static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO \| S_IWUSR, \
84f768c1 KH	266	show_temp_max, set_temp_max, offset - 1); \
	267	static SENSOR_DEVICE_ATTR(temp##offset##_crit, S_IRUGO, \
	268	show_temp_critical, NULL, offset - 1);
add77c64 KH	269
	270	temp_reg(1);
	271	temp_reg(2);
	272	temp_reg(3);
	273
dcf3b5fb KH	274	static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0);
	275	static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
	276	static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1);
	277	static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 7);
	278	static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2);
	279
add77c64 KH	280	static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO \| S_IWUSR, show_analog_out,
	281	set_analog_out, 0);
	282	static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);
	283
	284	static struct attribute *thmc50_attributes[] = {
	285	&sensor_dev_attr_temp1_max.dev_attr.attr,
	286	&sensor_dev_attr_temp1_min.dev_attr.attr,
	287	&sensor_dev_attr_temp1_input.dev_attr.attr,
84f768c1	288	&sensor_dev_attr_temp1_crit.dev_attr.attr,
dcf3b5fb	289	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
add77c64 KH	290	&sensor_dev_attr_temp2_max.dev_attr.attr,
	291	&sensor_dev_attr_temp2_min.dev_attr.attr,
	292	&sensor_dev_attr_temp2_input.dev_attr.attr,
84f768c1	293	&sensor_dev_attr_temp2_crit.dev_attr.attr,
dcf3b5fb KH	294	&sensor_dev_attr_temp2_alarm.dev_attr.attr,
dcf3b5fb KH	295	&sensor_dev_attr_temp2_fault.dev_attr.attr,
add77c64 KH	296	&sensor_dev_attr_pwm1.dev_attr.attr,
	297	&sensor_dev_attr_pwm1_mode.dev_attr.attr,
	298	NULL
	299	};
	300
	301	static const struct attribute_group thmc50_group = {
	302	.attrs = thmc50_attributes,
	303	};
	304
	305	/* for ADM1022 3rd temperature mode */
894c00cf	306	static struct attribute *temp3_attributes[] = {
add77c64 KH	307	&sensor_dev_attr_temp3_max.dev_attr.attr,
	308	&sensor_dev_attr_temp3_min.dev_attr.attr,
	309	&sensor_dev_attr_temp3_input.dev_attr.attr,
84f768c1	310	&sensor_dev_attr_temp3_crit.dev_attr.attr,
dcf3b5fb KH	311	&sensor_dev_attr_temp3_alarm.dev_attr.attr,
dcf3b5fb KH	312	&sensor_dev_attr_temp3_fault.dev_attr.attr,
add77c64 KH	313	NULL
	314	};
	315
894c00cf JD	316	static const struct attribute_group temp3_group = {
894c00cf JD	317	.attrs = temp3_attributes,
add77c64 KH	318	};
add77c64 KH	319
ccf37488	320	/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792	321	static int thmc50_detect(struct i2c_client *client,
ccf37488	322	struct i2c_board_info *info)
add77c64 KH	323	{
	324	unsigned company;
	325	unsigned revision;
	326	unsigned config;
ccf37488	327	struct i2c_adapter *adapter = client->adapter;
cc28a610	328	const char *type_name;
add77c64 KH	329
add77c64 KH	330	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
b55f3757	331	pr_debug("thmc50: detect failed, smbus byte data not supported!\n");
ccf37488	332	return -ENODEV;
add77c64 KH	333	}
add77c64 KH	334
add77c64 KH	335	pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n",
	336	client->addr, i2c_adapter_id(client->adapter));
	337
add77c64 KH	338	company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID);
	339	revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE);
	340	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
52df6440 JD	341	if (revision < 0xc0 \|\| (config & 0x10))
52df6440 JD	342	return -ENODEV;
add77c64	343
52df6440	344	if (company == 0x41) {
add77c64 KH	345	int id = i2c_adapter_id(client->adapter);
	346	int i;
	347
	348	type_name = "adm1022";
add77c64 KH	349	for (i = 0; i + 1 < adm1022_temp3_num; i += 2)
add77c64 KH	350	if (adm1022_temp3[i] == id &&
ccf37488	351	adm1022_temp3[i + 1] == client->addr) {
add77c64	352	/* enable 2nd remote temp */
ccf37488 JD	353	config \|= (1 << 7);
	354	i2c_smbus_write_byte_data(client,
	355	THMC50_REG_CONF,
	356	config);
add77c64 KH	357	break;
add77c64 KH	358	}
52df6440	359	} else if (company == 0x49) {
cc28a610	360	type_name = "thmc50";
52df6440 JD	361	} else {
	362	pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n");
	363	return -ENODEV;
add77c64	364	}
52df6440	365
cc28a610 JD	366	pr_debug("thmc50: Detected %s (version %x, revision %x)\n",
cc28a610 JD	367	type_name, (revision >> 4) - 0xc, revision & 0xf);
add77c64	368
ccf37488	369	strlcpy(info->type, type_name, I2C_NAME_SIZE);
add77c64	370
ccf37488 JD	371	return 0;
	372	}
	373
86fd260e	374	static void thmc50_init_client(struct thmc50_data *data)
9b38a66e	375	{
86fd260e	376	struct i2c_client *client = data->client;
9b38a66e AL	377	int config;
	378
	379	data->analog_out = i2c_smbus_read_byte_data(client,
	380	THMC50_REG_ANALOG_OUT);
	381	/* set up to at least 1 */
	382	if (data->analog_out == 0) {
	383	data->analog_out = 1;
	384	i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
	385	data->analog_out);
	386	}
	387	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	388	config \|= 0x1; /* start the chip if it is in standby mode */
	389	if (data->type == adm1022 && (config & (1 << 7)))
	390	data->has_temp3 = 1;
	391	i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
	392	}
	393
ccf37488 JD	394	static int thmc50_probe(struct i2c_client *client,
	395	const struct i2c_device_id *id)
	396	{
86fd260e	397	struct device *dev = &client->dev;
ccf37488	398	struct thmc50_data *data;
86fd260e AL	399	struct device *hwmon_dev;
86fd260e AL	400	int idx = 0;
ccf37488	401
86fd260e	402	data = devm_kzalloc(dev, sizeof(struct thmc50_data), GFP_KERNEL);
bd91d3ba GR	403	if (!data)
bd91d3ba GR	404	return -ENOMEM;
ccf37488	405
86fd260e	406	data->client = client;
ccf37488 JD	407	data->type = id->driver_data;
ccf37488 JD	408	mutex_init(&data->update_lock);
add77c64	409
86fd260e	410	thmc50_init_client(data);
add77c64	411
86fd260e AL	412	/* sysfs hooks */
86fd260e AL	413	data->groups[idx++] = &thmc50_group;
add77c64	414
86fd260e	415	/* Register additional ADM1022 sysfs hooks */
894c00cf	416	if (data->has_temp3)
86fd260e	417	data->groups[idx++] = &temp3_group;
add77c64	418
86fd260e AL	419	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
	420	data, data->groups);
	421	return PTR_ERR_OR_ZERO(hwmon_dev);
add77c64 KH	422	}
add77c64 KH	423
9b38a66e AL	424	static const struct i2c_device_id thmc50_id[] = {
	425	{ "adm1022", adm1022 },
	426	{ "thmc50", thmc50 },
	427	{ }
	428	};
	429	MODULE_DEVICE_TABLE(i2c, thmc50_id);
add77c64	430
9b38a66e AL	431	static struct i2c_driver thmc50_driver = {
	432	.class = I2C_CLASS_HWMON,
	433	.driver = {
	434	.name = "thmc50",
	435	},
	436	.probe = thmc50_probe,
9b38a66e AL	437	.id_table = thmc50_id,
	438	.detect = thmc50_detect,
	439	.address_list = normal_i2c,
	440	};
add77c64	441
f0967eea	442	module_i2c_driver(thmc50_driver);
add77c64 KH	443
	444	MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>");
	445	MODULE_DESCRIPTION("THMC50 driver");