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hwmon: (emc1403) Add support for EMC1404 and EMC1424

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

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2013-09-29 13:20:53 -07:00
parent 454aee17fd
commit 0011ddfe6a
1 changed files with 51 additions and 8 deletions
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59
drivers/hwmon/emc1403.c
View file

@ -21,7 +21,6 @@
* *
* TODO * TODO
* - cache alarm and critical limit registers * - cache alarm and critical limit registers
* - add emc1404 support
*/ */
#include <linux/module.h> #include <linux/module.h>
@ -41,6 +40,7 @@
struct thermal_data { struct thermal_data {
struct i2c_client *client; struct i2c_client *client;
const struct attribute_group *groups[3];
struct mutex mutex; struct mutex mutex;
/* /*
* Cache the hyst value so we don't keep re-reading it. In theory * 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, static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO | S_IWUSR,
show_hyst, store_hyst, 0x1A); 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, static SENSOR_DEVICE_ATTR_2(power_state, S_IRUGO | S_IWUSR,
show_bit, store_bit, 0x03, 0x40); show_bit, store_bit, 0x03, 0x40);
@ -264,7 +280,26 @@ static struct attribute *emc1403_attrs[] = {
&sensor_dev_attr_power_state.dev_attr.attr, &sensor_dev_attr_power_state.dev_attr.attr,
NULL 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, static int emc1403_detect(struct i2c_client *client,
struct i2c_board_info *info) struct i2c_board_info *info)
@ -284,10 +319,12 @@ static int emc1403_detect(struct i2c_client *client,
case 0x23: case 0x23:
strlcpy(info->type, "emc1423", I2C_NAME_SIZE); strlcpy(info->type, "emc1423", I2C_NAME_SIZE);
break; break;
/* case 0x25:
* Note: 0x25 is the 1404 which is very similar and this strlcpy(info->type, "emc1404", I2C_NAME_SIZE);
* driver could be extended break;
*/ case 0x27:
strlcpy(info->type, "emc1424", I2C_NAME_SIZE);
break;
default: default:
return -ENODEV; return -ENODEV;
} }
@ -314,13 +351,17 @@ static int emc1403_probe(struct i2c_client *client,
mutex_init(&data->mutex); mutex_init(&data->mutex);
data->hyst_valid = jiffies - 1; /* Expired */ 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, hwmon_dev = hwmon_device_register_with_groups(&client->dev,
client->name, data, client->name, data,
emc1403_groups); data->groups);
if (IS_ERR(hwmon_dev)) if (IS_ERR(hwmon_dev))
return PTR_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; return 0;
} }
@ -330,7 +371,9 @@ static const unsigned short emc1403_address_list[] = {
static const struct i2c_device_id emc1403_idtable[] = { static const struct i2c_device_id emc1403_idtable[] = {
{ "emc1403", 0 }, { "emc1403", 0 },
{ "emc1404", 1 },
{ "emc1423", 0 }, { "emc1423", 0 },
{ "emc1424", 1 },
{ } { }
}; };
MODULE_DEVICE_TABLE(i2c, emc1403_idtable); MODULE_DEVICE_TABLE(i2c, emc1403_idtable);