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Commit 0011ddfe authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (emc1403) Add support for EMC1404 and EMC1424 



EMC1404 and EMC1424 are similar to EMC1403 and EMC1423,
but support an additional external temperature sensor.

Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent 454aee17

drivers/hwmon/emc1403.c

+51 −8
Original line number Diff line number Diff line
@@ -21,7 +21,6 @@ 
 *

 * TODO

 *	-	cache alarm and critical limit registers

 *	-	add emc1404 support

 */



#include <linux/module.h>
@@ -41,6 +40,7 @@ 


struct thermal_data {

	struct i2c_client *client;

	const struct attribute_group *groups[3];

	struct mutex mutex;

	/*

	 * Cache the hyst value so we don't keep re-reading it. In theory
@@ -233,6 +233,22 @@ static SENSOR_DEVICE_ATTR_2(temp3_crit_alarm, S_IRUGO, 
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);
@@ -264,7 +280,26 @@ static struct attribute *emc1403_attrs[] = { 
	&sensor_dev_attr_power_state.dev_attr.attr,

	NULL

};

ATTRIBUTE_GROUPS(emc1403);



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)
@@ -284,10 +319,12 @@ static int emc1403_detect(struct i2c_client *client, 
	case 0x23:

		strlcpy(info->type, "emc1423", I2C_NAME_SIZE);

		break;

	/*

	 * Note: 0x25 is the 1404 which is very similar and this

	 * driver could be extended

	 */

	case 0x25:

		strlcpy(info->type, "emc1404", I2C_NAME_SIZE);

		break;

	case 0x27:

		strlcpy(info->type, "emc1424", I2C_NAME_SIZE);

		break;

	default:

		return -ENODEV;

	}
@@ -314,13 +351,17 @@ static int emc1403_probe(struct i2c_client *client, 
	mutex_init(&data->mutex);

	data->hyst_valid = jiffies - 1;		/* Expired */



	data->groups[0] = &emc1403_group;

	if (id->driver_data)

		data->groups[1] = &emc1404_group;



	hwmon_dev = hwmon_device_register_with_groups(&client->dev,

						      client->name, data,

						      emc1403_groups);

						      data->groups);

	if (IS_ERR(hwmon_dev))

		return PTR_ERR(hwmon_dev);



	dev_info(&client->dev, "EMC1403 Thermal chip found\n");

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

	return 0;

}
@@ -330,7 +371,9 @@ static const unsigned short emc1403_address_list[] = { 


static const struct i2c_device_id emc1403_idtable[] = {

	{ "emc1403", 0 },

	{ "emc1404", 1 },

	{ "emc1423", 0 },

	{ "emc1424", 1 },

	{ }

};

MODULE_DEVICE_TABLE(i2c, emc1403_idtable);