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hwmon: (emc1403) Add support for emc14x2 

Add support for emc1402/emc1412/emc1422 temperature monitoring chips.
This line of sensors only has 2 temperature channels (internal and external)
in comparison to the emc14x3 (3 channels) and emc14x4 (4 channels).

Signed-off-by: Josef Gajdusek <atx@atx.name>
[Guenter Roeck: ordered i2c address list, updated description/headline]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Josef Gajdusek 2014-05-12 14:34:09 +02:00 committed by Guenter Roeck
parent 962a75a2d5
commit be7f5c4d48
1 changed files with 43 additions and 15 deletions
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58
drivers/hwmon/emc1403.c
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@ -38,9 +38,11 @@
#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[3];
const struct attribute_group *groups[4];
struct mutex mutex;
/*
* Cache the hyst value so we don't keep re-reading it. In theory
@ -252,23 +254,36 @@ static SENSOR_DEVICE_ATTR(temp4_crit_hyst, S_IRUGO | S_IWUSR,
static SENSOR_DEVICE_ATTR_2(power_state, S_IRUGO | S_IWUSR,
show_bit, store_bit, 0x03, 0x40);
static struct attribute *emc1403_attrs[] = {
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_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_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_temp2_crit_hyst.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,
@ -277,7 +292,6 @@ static struct attribute *emc1403_attrs[] = {
&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,
&sensor_dev_attr_power_state.dev_attr.attr,
NULL
};
@ -313,9 +327,15 @@ static int emc1403_detect(struct i2c_client *client,
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;
@ -351,9 +371,14 @@ 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;
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,
@ -366,14 +391,17 @@ static int emc1403_probe(struct i2c_client *client,
}
static const unsigned short emc1403_address_list[] = {
0x18, 0x29, 0x4c, 0x4d, I2C_CLIENT_END
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[] = {
{ "emc1403", 0 },
{ "emc1404", 1 },
{ "emc1423", 0 },
{ "emc1424", 1 },
{ "emc1402", emc1402 },
{ "emc1403", emc1403 },
{ "emc1404", emc1404 },
{ "emc1422", emc1402 },
{ "emc1423", emc1403 },
{ "emc1424", emc1404 },
{ }
};
MODULE_DEVICE_TABLE(i2c, emc1403_idtable);