[linux-2.6-block.git] / drivers / hwmon / adm1029.c

// SPDX-License-Identifier: GPL-2.0
/*
 * adm1029.c - Part of lm_sensors, Linux kernel modules for hardware monitoring
 *
 * Copyright (C) 2006 Corentin LABBE <clabbe.montjoie@gmail.com>
 *
 * Based on LM83 Driver by Jean Delvare <jdelvare@suse.de>
 *
 * Give only processor, motherboard temperatures and fan tachs
 * Very rare chip please let me know if you use it
 *
 * http://www.analog.com/UploadedFiles/Data_Sheets/ADM1029.pdf
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon-sysfs.h>
#include <linux/hwmon.h>
#include <linux/err.h>
#include <linux/mutex.h>

/*
 * Addresses to scan
 */

static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
						0x2e, 0x2f, I2C_CLIENT_END
};

/*
 * The ADM1029 registers
 * Manufacturer ID is 0x41 for Analog Devices
 */

#define ADM1029_REG_MAN_ID			0x0D
#define ADM1029_REG_CHIP_ID			0x0E
#define ADM1029_REG_CONFIG			0x01
#define ADM1029_REG_NB_FAN_SUPPORT		0x02

#define ADM1029_REG_TEMP_DEVICES_INSTALLED	0x06

#define ADM1029_REG_LOCAL_TEMP			0xA0
#define ADM1029_REG_REMOTE1_TEMP		0xA1
#define ADM1029_REG_REMOTE2_TEMP		0xA2

#define ADM1029_REG_LOCAL_TEMP_HIGH		0x90
#define ADM1029_REG_REMOTE1_TEMP_HIGH		0x91
#define ADM1029_REG_REMOTE2_TEMP_HIGH		0x92

#define ADM1029_REG_LOCAL_TEMP_LOW		0x98
#define ADM1029_REG_REMOTE1_TEMP_LOW		0x99
#define ADM1029_REG_REMOTE2_TEMP_LOW		0x9A

#define ADM1029_REG_FAN1			0x70
#define ADM1029_REG_FAN2			0x71

#define ADM1029_REG_FAN1_MIN			0x78
#define ADM1029_REG_FAN2_MIN			0x79

#define ADM1029_REG_FAN1_CONFIG			0x68
#define ADM1029_REG_FAN2_CONFIG			0x69

#define TEMP_FROM_REG(val)	((val) * 1000)

#define DIV_FROM_REG(val)	(1 << (((val) >> 6) - 1))

/* Registers to be checked by adm1029_update_device() */
static const u8 ADM1029_REG_TEMP[] = {
	ADM1029_REG_LOCAL_TEMP,
	ADM1029_REG_REMOTE1_TEMP,
	ADM1029_REG_REMOTE2_TEMP,
	ADM1029_REG_LOCAL_TEMP_HIGH,
	ADM1029_REG_REMOTE1_TEMP_HIGH,
	ADM1029_REG_REMOTE2_TEMP_HIGH,
	ADM1029_REG_LOCAL_TEMP_LOW,
	ADM1029_REG_REMOTE1_TEMP_LOW,
	ADM1029_REG_REMOTE2_TEMP_LOW,
};

static const u8 ADM1029_REG_FAN[] = {
	ADM1029_REG_FAN1,
	ADM1029_REG_FAN2,
	ADM1029_REG_FAN1_MIN,
	ADM1029_REG_FAN2_MIN,
};

static const u8 ADM1029_REG_FAN_DIV[] = {
	ADM1029_REG_FAN1_CONFIG,
	ADM1029_REG_FAN2_CONFIG,
};

/*
 * Client data (each client gets its own)
 */

struct adm1029_data {
	struct i2c_client *client;
	struct mutex update_lock; /* protect register access */
	char valid;		/* zero until following fields are valid */
	unsigned long last_updated;	/* in jiffies */

	/* registers values, signed for temperature, unsigned for other stuff */
	s8 temp[ARRAY_SIZE(ADM1029_REG_TEMP)];
	u8 fan[ARRAY_SIZE(ADM1029_REG_FAN)];
	u8 fan_div[ARRAY_SIZE(ADM1029_REG_FAN_DIV)];
};

/*
 * function that update the status of the chips (temperature for example)
 */
static struct adm1029_data *adm1029_update_device(struct device *dev)
{
	struct adm1029_data *data = dev_get_drvdata(dev);
	struct i2c_client *client = data->client;

	mutex_lock(&data->update_lock);
	/*
	 * Use the "cache" Luke, don't recheck values
	 * if there are already checked not a long time later
	 */
	if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
		int nr;

		dev_dbg(&client->dev, "Updating adm1029 data\n");

		for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_TEMP); nr++) {
			data->temp[nr] =
			    i2c_smbus_read_byte_data(client,
						     ADM1029_REG_TEMP[nr]);
		}
		for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN); nr++) {
			data->fan[nr] =
			    i2c_smbus_read_byte_data(client,
						     ADM1029_REG_FAN[nr]);
		}
		for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN_DIV); nr++) {
			data->fan_div[nr] =
			    i2c_smbus_read_byte_data(client,
						     ADM1029_REG_FAN_DIV[nr]);
		}

		data->last_updated = jiffies;
		data->valid = 1;
	}

	mutex_unlock(&data->update_lock);

	return data;
}

/*
 * Sysfs stuff
 */

static ssize_t
temp_show(struct device *dev, struct device_attribute *devattr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct adm1029_data *data = adm1029_update_device(dev);

	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index]));
}

static ssize_t
fan_show(struct device *dev, struct device_attribute *devattr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct adm1029_data *data = adm1029_update_device(dev);
	u16 val;

	if (data->fan[attr->index] == 0 ||
	    (data->fan_div[attr->index] & 0xC0) == 0 ||
	    data->fan[attr->index] == 255) {
		return sprintf(buf, "0\n");
	}

	val = 1880 * 120 / DIV_FROM_REG(data->fan_div[attr->index])
	    / data->fan[attr->index];
	return sprintf(buf, "%d\n", val);
}

static ssize_t
fan_div_show(struct device *dev, struct device_attribute *devattr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct adm1029_data *data = adm1029_update_device(dev);

	if ((data->fan_div[attr->index] & 0xC0) == 0)
		return sprintf(buf, "0\n");
	return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index]));
}

static ssize_t fan_div_store(struct device *dev,
			     struct device_attribute *devattr,
			     const char *buf, size_t count)
{
	struct adm1029_data *data = dev_get_drvdata(dev);
	struct i2c_client *client = data->client;
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	u8 reg;
	long val;
	int ret = kstrtol(buf, 10, &val);

	if (ret < 0)
		return ret;

	mutex_lock(&data->update_lock);

	/*Read actual config */
	reg = i2c_smbus_read_byte_data(client,
				       ADM1029_REG_FAN_DIV[attr->index]);

	switch (val) {
	case 1:
		val = 1;
		break;
	case 2:
		val = 2;
		break;
	case 4:
		val = 3;
		break;
	default:
		mutex_unlock(&data->update_lock);
		dev_err(&client->dev,
			"fan_div value %ld not supported. Choose one of 1, 2 or 4!\n",
			val);
		return -EINVAL;
	}
	/* Update the value */
	reg = (reg & 0x3F) | (val << 6);

	/* Update the cache */
	data->fan_div[attr->index] = reg;

	/* Write value */
	i2c_smbus_write_byte_data(client,
				  ADM1029_REG_FAN_DIV[attr->index], reg);
	mutex_unlock(&data->update_lock);

	return count;
}

/* Access rights on sysfs. */
static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);

static SENSOR_DEVICE_ATTR_RO(temp1_max, temp, 3);
static SENSOR_DEVICE_ATTR_RO(temp2_max, temp, 4);
static SENSOR_DEVICE_ATTR_RO(temp3_max, temp, 5);

static SENSOR_DEVICE_ATTR_RO(temp1_min, temp, 6);
static SENSOR_DEVICE_ATTR_RO(temp2_min, temp, 7);
static SENSOR_DEVICE_ATTR_RO(temp3_min, temp, 8);

static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);

static SENSOR_DEVICE_ATTR_RO(fan1_min, fan, 2);
static SENSOR_DEVICE_ATTR_RO(fan2_min, fan, 3);

static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);

static struct attribute *adm1029_attrs[] = {
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	&sensor_dev_attr_temp1_min.dev_attr.attr,
	&sensor_dev_attr_temp1_max.dev_attr.attr,
	&sensor_dev_attr_temp2_input.dev_attr.attr,
	&sensor_dev_attr_temp2_min.dev_attr.attr,
	&sensor_dev_attr_temp2_max.dev_attr.attr,
	&sensor_dev_attr_temp3_input.dev_attr.attr,
	&sensor_dev_attr_temp3_min.dev_attr.attr,
	&sensor_dev_attr_temp3_max.dev_attr.attr,
	&sensor_dev_attr_fan1_input.dev_attr.attr,
	&sensor_dev_attr_fan2_input.dev_attr.attr,
	&sensor_dev_attr_fan1_min.dev_attr.attr,
	&sensor_dev_attr_fan2_min.dev_attr.attr,
	&sensor_dev_attr_fan1_div.dev_attr.attr,
	&sensor_dev_attr_fan2_div.dev_attr.attr,
	NULL
};

ATTRIBUTE_GROUPS(adm1029);

/*
 * Real code
 */

/* Return 0 if detection is successful, -ENODEV otherwise */
static int adm1029_detect(struct i2c_client *client,
			  struct i2c_board_info *info)
{
	struct i2c_adapter *adapter = client->adapter;
	u8 man_id, chip_id, temp_devices_installed, nb_fan_support;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return -ENODEV;

	/*
	 * ADM1029 doesn't have CHIP ID, check just MAN ID
	 * For better detection we check also ADM1029_TEMP_DEVICES_INSTALLED,
	 * ADM1029_REG_NB_FAN_SUPPORT and compare it with possible values
	 * documented
	 */

	man_id = i2c_smbus_read_byte_data(client, ADM1029_REG_MAN_ID);
	chip_id = i2c_smbus_read_byte_data(client, ADM1029_REG_CHIP_ID);
	temp_devices_installed = i2c_smbus_read_byte_data(client,
					ADM1029_REG_TEMP_DEVICES_INSTALLED);
	nb_fan_support = i2c_smbus_read_byte_data(client,
						  ADM1029_REG_NB_FAN_SUPPORT);
	/* 0x41 is Analog Devices */
	if (man_id != 0x41 || (temp_devices_installed & 0xf9) != 0x01 ||
	    nb_fan_support != 0x03)
		return -ENODEV;

	if ((chip_id & 0xF0) != 0x00) {
		/*
		 * There are no "official" CHIP ID, so actually
		 * we use Major/Minor revision for that
		 */
		pr_info("Unknown major revision %x, please let us know\n",
			chip_id);
		return -ENODEV;
	}

	strlcpy(info->type, "adm1029", I2C_NAME_SIZE);

	return 0;
}

static int adm1029_init_client(struct i2c_client *client)
{
	u8 config;

	config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG);
	if ((config & 0x10) == 0) {
		i2c_smbus_write_byte_data(client, ADM1029_REG_CONFIG,
					  config | 0x10);
	}
	/* recheck config */
	config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG);
	if ((config & 0x10) == 0) {
		dev_err(&client->dev, "Initialization failed!\n");
		return 0;
	}
	return 1;
}

static int adm1029_probe(struct i2c_client *client,
			 const struct i2c_device_id *id)
{
	struct device *dev = &client->dev;
	struct adm1029_data *data;
	struct device *hwmon_dev;

	data = devm_kzalloc(dev, sizeof(struct adm1029_data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->client = client;
	mutex_init(&data->update_lock);

	/*
	 * Initialize the ADM1029 chip
	 * Check config register
	 */
	if (adm1029_init_client(client) == 0)
		return -ENODEV;

	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
							   data,
							   adm1029_groups);
	return PTR_ERR_OR_ZERO(hwmon_dev);
}

static const struct i2c_device_id adm1029_id[] = {
	{ "adm1029", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, adm1029_id);

static struct i2c_driver adm1029_driver = {
	.class		= I2C_CLASS_HWMON,
	.driver = {
		.name = "adm1029",
	},
	.probe		= adm1029_probe,
	.id_table	= adm1029_id,
	.detect		= adm1029_detect,
	.address_list	= normal_i2c,
};

module_i2c_driver(adm1029_driver);

MODULE_AUTHOR("Corentin LABBE <clabbe.montjoie@gmail.com>");
MODULE_DESCRIPTION("adm1029 driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
4b4fb254	1	// SPDX-License-Identifier: GPL-2.0
cae2caae CL	2	/*
	3	* adm1029.c - Part of lm_sensors, Linux kernel modules for hardware monitoring
	4	*
962a75a2	5	* Copyright (C) 2006 Corentin LABBE <clabbe.montjoie@gmail.com>
cae2caae	6	*
7c81c60f	7	* Based on LM83 Driver by Jean Delvare <jdelvare@suse.de>
cae2caae CL	8	*
	9	* Give only processor, motherboard temperatures and fan tachs
	10	* Very rare chip please let me know if you use it
	11	*
	12	* http://www.analog.com/UploadedFiles/Data_Sheets/ADM1029.pdf
cae2caae CL	13	*/
	14
	15	#include <linux/module.h>
	16	#include <linux/init.h>
	17	#include <linux/slab.h>
	18	#include <linux/jiffies.h>
	19	#include <linux/i2c.h>
	20	#include <linux/hwmon-sysfs.h>
	21	#include <linux/hwmon.h>
	22	#include <linux/err.h>
	23	#include <linux/mutex.h>
	24
	25	/*
	26	* Addresses to scan
	27	*/
	28
25e9c86d MH	29	static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
25e9c86d MH	30	0x2e, 0x2f, I2C_CLIENT_END
cae2caae CL	31	};
cae2caae CL	32
cae2caae CL	33	/*
	34	* The ADM1029 registers
	35	* Manufacturer ID is 0x41 for Analog Devices
	36	*/
	37
	38	#define ADM1029_REG_MAN_ID 0x0D
	39	#define ADM1029_REG_CHIP_ID 0x0E
	40	#define ADM1029_REG_CONFIG 0x01
	41	#define ADM1029_REG_NB_FAN_SUPPORT 0x02
	42
	43	#define ADM1029_REG_TEMP_DEVICES_INSTALLED 0x06
	44
	45	#define ADM1029_REG_LOCAL_TEMP 0xA0
	46	#define ADM1029_REG_REMOTE1_TEMP 0xA1
	47	#define ADM1029_REG_REMOTE2_TEMP 0xA2
	48
	49	#define ADM1029_REG_LOCAL_TEMP_HIGH 0x90
	50	#define ADM1029_REG_REMOTE1_TEMP_HIGH 0x91
	51	#define ADM1029_REG_REMOTE2_TEMP_HIGH 0x92
	52
	53	#define ADM1029_REG_LOCAL_TEMP_LOW 0x98
	54	#define ADM1029_REG_REMOTE1_TEMP_LOW 0x99
	55	#define ADM1029_REG_REMOTE2_TEMP_LOW 0x9A
	56
	57	#define ADM1029_REG_FAN1 0x70
	58	#define ADM1029_REG_FAN2 0x71
	59
	60	#define ADM1029_REG_FAN1_MIN 0x78
	61	#define ADM1029_REG_FAN2_MIN 0x79
	62
	63	#define ADM1029_REG_FAN1_CONFIG 0x68
	64	#define ADM1029_REG_FAN2_CONFIG 0x69
	65
	66	#define TEMP_FROM_REG(val) ((val) * 1000)
	67
08f50907	68	#define DIV_FROM_REG(val) (1 << (((val) >> 6) - 1))
cae2caae CL	69
	70	/* Registers to be checked by adm1029_update_device() */
	71	static const u8 ADM1029_REG_TEMP[] = {
	72	ADM1029_REG_LOCAL_TEMP,
	73	ADM1029_REG_REMOTE1_TEMP,
	74	ADM1029_REG_REMOTE2_TEMP,
	75	ADM1029_REG_LOCAL_TEMP_HIGH,
	76	ADM1029_REG_REMOTE1_TEMP_HIGH,
	77	ADM1029_REG_REMOTE2_TEMP_HIGH,
	78	ADM1029_REG_LOCAL_TEMP_LOW,
	79	ADM1029_REG_REMOTE1_TEMP_LOW,
	80	ADM1029_REG_REMOTE2_TEMP_LOW,
	81	};
	82
	83	static const u8 ADM1029_REG_FAN[] = {
	84	ADM1029_REG_FAN1,
	85	ADM1029_REG_FAN2,
	86	ADM1029_REG_FAN1_MIN,
	87	ADM1029_REG_FAN2_MIN,
	88	};
	89
	90	static const u8 ADM1029_REG_FAN_DIV[] = {
	91	ADM1029_REG_FAN1_CONFIG,
	92	ADM1029_REG_FAN2_CONFIG,
	93	};
	94
cae2caae CL	95	/*
	96	* Client data (each client gets its own)
	97	*/
	98
	99	struct adm1029_data {
4fd5233f	100	struct i2c_client *client;
8241f885	101	struct mutex update_lock; /* protect register access */
cae2caae CL	102	char valid; /* zero until following fields are valid */
	103	unsigned long last_updated; /* in jiffies */
	104
	105	/* registers values, signed for temperature, unsigned for other stuff */
	106	s8 temp[ARRAY_SIZE(ADM1029_REG_TEMP)];
	107	u8 fan[ARRAY_SIZE(ADM1029_REG_FAN)];
	108	u8 fan_div[ARRAY_SIZE(ADM1029_REG_FAN_DIV)];
	109	};
	110
b12e484e AL	111	/*
	112	* function that update the status of the chips (temperature for example)
	113	*/
	114	static struct adm1029_data adm1029_update_device(struct device dev)
	115	{
4fd5233f AL	116	struct adm1029_data *data = dev_get_drvdata(dev);
4fd5233f AL	117	struct i2c_client *client = data->client;
b12e484e AL	118
	119	mutex_lock(&data->update_lock);
	120	/*
	121	* Use the "cache" Luke, don't recheck values
	122	* if there are already checked not a long time later
	123	*/
d6450e85	124	if (time_after(jiffies, data->last_updated + HZ * 2) \|\| !data->valid) {
b12e484e AL	125	int nr;
	126
	127	dev_dbg(&client->dev, "Updating adm1029 data\n");
	128
	129	for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_TEMP); nr++) {
	130	data->temp[nr] =
	131	i2c_smbus_read_byte_data(client,
	132	ADM1029_REG_TEMP[nr]);
	133	}
	134	for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN); nr++) {
	135	data->fan[nr] =
	136	i2c_smbus_read_byte_data(client,
	137	ADM1029_REG_FAN[nr]);
	138	}
	139	for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN_DIV); nr++) {
	140	data->fan_div[nr] =
	141	i2c_smbus_read_byte_data(client,
	142	ADM1029_REG_FAN_DIV[nr]);
	143	}
	144
	145	data->last_updated = jiffies;
	146	data->valid = 1;
	147	}
	148
	149	mutex_unlock(&data->update_lock);
	150
	151	return data;
	152	}
	153
cae2caae CL	154	/*
	155	* Sysfs stuff
	156	*/
	157
	158	static ssize_t
19f7b176	159	temp_show(struct device dev, struct device_attribute devattr, char *buf)
cae2caae CL	160	{
	161	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	162	struct adm1029_data *data = adm1029_update_device(dev);
66b331ca	163
cae2caae CL	164	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index]));
	165	}
	166
	167	static ssize_t
19f7b176	168	fan_show(struct device dev, struct device_attribute devattr, char *buf)
cae2caae CL	169	{
	170	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	171	struct adm1029_data *data = adm1029_update_device(dev);
	172	u16 val;
66b331ca	173
d6450e85 CL	174	if (data->fan[attr->index] == 0 \|\|
	175	(data->fan_div[attr->index] & 0xC0) == 0 \|\|
	176	data->fan[attr->index] == 255) {
cae2caae CL	177	return sprintf(buf, "0\n");
	178	}
	179
	180	val = 1880 * 120 / DIV_FROM_REG(data->fan_div[attr->index])
	181	/ data->fan[attr->index];
	182	return sprintf(buf, "%d\n", val);
	183	}
	184
	185	static ssize_t
19f7b176	186	fan_div_show(struct device dev, struct device_attribute devattr, char *buf)
cae2caae CL	187	{
	188	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	189	struct adm1029_data *data = adm1029_update_device(dev);
66b331ca	190
366716e6	191	if ((data->fan_div[attr->index] & 0xC0) == 0)
cae2caae CL	192	return sprintf(buf, "0\n");
	193	return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index]));
	194	}
	195
19f7b176 GR	196	static ssize_t fan_div_store(struct device *dev,
	197	struct device_attribute *devattr,
	198	const char *buf, size_t count)
cae2caae	199	{
4fd5233f AL	200	struct adm1029_data *data = dev_get_drvdata(dev);
4fd5233f AL	201	struct i2c_client *client = data->client;
cae2caae	202	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
cae2caae	203	u8 reg;
08f50907 FM	204	long val;
08f50907 FM	205	int ret = kstrtol(buf, 10, &val);
66b331ca	206
08f50907 FM	207	if (ret < 0)
08f50907 FM	208	return ret;
cae2caae CL	209
	210	mutex_lock(&data->update_lock);
	211
	212	/Read actual config /
	213	reg = i2c_smbus_read_byte_data(client,
	214	ADM1029_REG_FAN_DIV[attr->index]);
	215
	216	switch (val) {
	217	case 1:
	218	val = 1;
	219	break;
	220	case 2:
	221	val = 2;
	222	break;
	223	case 4:
	224	val = 3;
	225	break;
	226	default:
	227	mutex_unlock(&data->update_lock);
b55f3757 GR	228	dev_err(&client->dev,
	229	"fan_div value %ld not supported. Choose one of 1, 2 or 4!\n",
	230	val);
cae2caae CL	231	return -EINVAL;
	232	}
	233	/* Update the value */
	234	reg = (reg & 0x3F) \| (val << 6);
	235
1035a9e3 AL	236	/* Update the cache */
	237	data->fan_div[attr->index] = reg;
	238
cae2caae CL	239	/* Write value */
	240	i2c_smbus_write_byte_data(client,
	241	ADM1029_REG_FAN_DIV[attr->index], reg);
	242	mutex_unlock(&data->update_lock);
	243
	244	return count;
	245	}
	246
b6c6d0cf	247	/* Access rights on sysfs. */
19f7b176 GR	248	static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
	249	static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
	250	static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
cae2caae	251
19f7b176 GR	252	static SENSOR_DEVICE_ATTR_RO(temp1_max, temp, 3);
	253	static SENSOR_DEVICE_ATTR_RO(temp2_max, temp, 4);
	254	static SENSOR_DEVICE_ATTR_RO(temp3_max, temp, 5);
cae2caae	255
19f7b176 GR	256	static SENSOR_DEVICE_ATTR_RO(temp1_min, temp, 6);
	257	static SENSOR_DEVICE_ATTR_RO(temp2_min, temp, 7);
	258	static SENSOR_DEVICE_ATTR_RO(temp3_min, temp, 8);
cae2caae	259
19f7b176 GR	260	static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
19f7b176 GR	261	static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
cae2caae	262
19f7b176 GR	263	static SENSOR_DEVICE_ATTR_RO(fan1_min, fan, 2);
19f7b176 GR	264	static SENSOR_DEVICE_ATTR_RO(fan2_min, fan, 3);
cae2caae	265
19f7b176 GR	266	static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
19f7b176 GR	267	static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
cae2caae	268
4fd5233f	269	static struct attribute *adm1029_attrs[] = {
cae2caae CL	270	&sensor_dev_attr_temp1_input.dev_attr.attr,
	271	&sensor_dev_attr_temp1_min.dev_attr.attr,
	272	&sensor_dev_attr_temp1_max.dev_attr.attr,
	273	&sensor_dev_attr_temp2_input.dev_attr.attr,
	274	&sensor_dev_attr_temp2_min.dev_attr.attr,
	275	&sensor_dev_attr_temp2_max.dev_attr.attr,
	276	&sensor_dev_attr_temp3_input.dev_attr.attr,
	277	&sensor_dev_attr_temp3_min.dev_attr.attr,
	278	&sensor_dev_attr_temp3_max.dev_attr.attr,
	279	&sensor_dev_attr_fan1_input.dev_attr.attr,
	280	&sensor_dev_attr_fan2_input.dev_attr.attr,
	281	&sensor_dev_attr_fan1_min.dev_attr.attr,
	282	&sensor_dev_attr_fan2_min.dev_attr.attr,
	283	&sensor_dev_attr_fan1_div.dev_attr.attr,
	284	&sensor_dev_attr_fan2_div.dev_attr.attr,
	285	NULL
	286	};
	287
4fd5233f	288	ATTRIBUTE_GROUPS(adm1029);
cae2caae CL	289
	290	/*
	291	* Real code
	292	*/
	293
9c97fb4d	294	/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792	295	static int adm1029_detect(struct i2c_client *client,
9c97fb4d	296	struct i2c_board_info *info)
cae2caae	297	{
9c97fb4d	298	struct i2c_adapter *adapter = client->adapter;
52df6440	299	u8 man_id, chip_id, temp_devices_installed, nb_fan_support;
cae2caae	300
cae2caae	301	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
9c97fb4d	302	return -ENODEV;
cae2caae	303
94b991d4 GR	304	/*
94b991d4 GR	305	* ADM1029 doesn't have CHIP ID, check just MAN ID
cae2caae CL	306	* For better detection we check also ADM1029_TEMP_DEVICES_INSTALLED,
	307	* ADM1029_REG_NB_FAN_SUPPORT and compare it with possible values
	308	* documented
	309	*/
	310
52df6440 JD	311	man_id = i2c_smbus_read_byte_data(client, ADM1029_REG_MAN_ID);
	312	chip_id = i2c_smbus_read_byte_data(client, ADM1029_REG_CHIP_ID);
	313	temp_devices_installed = i2c_smbus_read_byte_data(client,
cae2caae	314	ADM1029_REG_TEMP_DEVICES_INSTALLED);
52df6440	315	nb_fan_support = i2c_smbus_read_byte_data(client,
a15ad193	316	ADM1029_REG_NB_FAN_SUPPORT);
52df6440	317	/* 0x41 is Analog Devices */
d6450e85 CL	318	if (man_id != 0x41 \|\| (temp_devices_installed & 0xf9) != 0x01 \|\|
d6450e85 CL	319	nb_fan_support != 0x03)
52df6440 JD	320	return -ENODEV;
	321
	322	if ((chip_id & 0xF0) != 0x00) {
94b991d4 GR	323	/*
	324	* There are no "official" CHIP ID, so actually
	325	* we use Major/Minor revision for that
	326	*/
b55f3757 GR	327	pr_info("Unknown major revision %x, please let us know\n",
b55f3757 GR	328	chip_id);
52df6440	329	return -ENODEV;
cae2caae	330	}
52df6440	331
9c97fb4d	332	strlcpy(info->type, "adm1029", I2C_NAME_SIZE);
cae2caae	333
9c97fb4d JD	334	return 0;
	335	}
	336
b12e484e AL	337	static int adm1029_init_client(struct i2c_client *client)
	338	{
	339	u8 config;
	340
	341	config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG);
	342	if ((config & 0x10) == 0) {
	343	i2c_smbus_write_byte_data(client, ADM1029_REG_CONFIG,
	344	config \| 0x10);
	345	}
	346	/* recheck config */
	347	config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG);
	348	if ((config & 0x10) == 0) {
	349	dev_err(&client->dev, "Initialization failed!\n");
	350	return 0;
	351	}
	352	return 1;
	353	}
	354
9c97fb4d JD	355	static int adm1029_probe(struct i2c_client *client,
	356	const struct i2c_device_id *id)
	357	{
4fd5233f	358	struct device *dev = &client->dev;
9c97fb4d	359	struct adm1029_data *data;
4fd5233f	360	struct device *hwmon_dev;
9c97fb4d	361
4fd5233f	362	data = devm_kzalloc(dev, sizeof(struct adm1029_data), GFP_KERNEL);
08940b8a GR	363	if (!data)
08940b8a GR	364	return -ENOMEM;
cae2caae	365
4fd5233f	366	data->client = client;
cae2caae CL	367	mutex_init(&data->update_lock);
cae2caae CL	368
cae2caae CL	369	/*
	370	* Initialize the ADM1029 chip
	371	* Check config register
	372	*/
08940b8a GR	373	if (adm1029_init_client(client) == 0)
08940b8a GR	374	return -ENODEV;
cae2caae	375
4fd5233f AL	376	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
	377	data,
	378	adm1029_groups);
	379	return PTR_ERR_OR_ZERO(hwmon_dev);
cae2caae CL	380	}
cae2caae CL	381
b12e484e AL	382	static const struct i2c_device_id adm1029_id[] = {
	383	{ "adm1029", 0 },
	384	{ }
	385	};
	386	MODULE_DEVICE_TABLE(i2c, adm1029_id);
cae2caae	387
b12e484e AL	388	static struct i2c_driver adm1029_driver = {
	389	.class = I2C_CLASS_HWMON,
	390	.driver = {
	391	.name = "adm1029",
	392	},
	393	.probe = adm1029_probe,
b12e484e AL	394	.id_table = adm1029_id,
	395	.detect = adm1029_detect,
	396	.address_list = normal_i2c,
	397	};
cae2caae	398
f0967eea	399	module_i2c_driver(adm1029_driver);
cae2caae	400
962a75a2	401	MODULE_AUTHOR("Corentin LABBE <clabbe.montjoie@gmail.com>");
cae2caae CL	402	MODULE_DESCRIPTION("adm1029 driver");
cae2caae CL	403	MODULE_LICENSE("GPL v2");