summaryrefslogtreecommitdiff
path: root/drivers/hwmon/adm1021.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/hwmon/adm1021.c')
-rw-r--r--drivers/hwmon/adm1021.c79
1 files changed, 55 insertions, 24 deletions
diff --git a/drivers/hwmon/adm1021.c b/drivers/hwmon/adm1021.c
index b11e06f644b1..afc594318125 100644
--- a/drivers/hwmon/adm1021.c
+++ b/drivers/hwmon/adm1021.c
@@ -83,16 +83,14 @@ struct adm1021_data {
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
+ char low_power; /* !=0 if device in low power mode */
unsigned long last_updated; /* In jiffies */
- s8 temp_max[2]; /* Register values */
- s8 temp_min[2];
- s8 temp[2];
+ int temp_max[2]; /* Register values */
+ int temp_min[2];
+ int temp[2];
u8 alarms;
/* Special values for ADM1023 only */
- u8 remote_temp_prec;
- u8 remote_temp_os_prec;
- u8 remote_temp_hyst_prec;
u8 remote_temp_offset;
u8 remote_temp_offset_prec;
};
@@ -141,7 +139,7 @@ static ssize_t show_temp(struct device *dev,
int index = to_sensor_dev_attr(devattr)->index;
struct adm1021_data *data = adm1021_update_device(dev);
- return sprintf(buf, "%d\n", 1000 * data->temp[index]);
+ return sprintf(buf, "%d\n", data->temp[index]);
}
static ssize_t show_temp_max(struct device *dev,
@@ -150,7 +148,7 @@ static ssize_t show_temp_max(struct device *dev,
int index = to_sensor_dev_attr(devattr)->index;
struct adm1021_data *data = adm1021_update_device(dev);
- return sprintf(buf, "%d\n", 1000 * data->temp_max[index]);
+ return sprintf(buf, "%d\n", data->temp_max[index]);
}
static ssize_t show_temp_min(struct device *dev,
@@ -159,7 +157,7 @@ static ssize_t show_temp_min(struct device *dev,
int index = to_sensor_dev_attr(devattr)->index;
struct adm1021_data *data = adm1021_update_device(dev);
- return sprintf(buf, "%d\n", 1000 * data->temp_min[index]);
+ return sprintf(buf, "%d\n", data->temp_min[index]);
}
static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
@@ -216,6 +214,35 @@ static ssize_t set_temp_min(struct device *dev,
return count;
}
+static ssize_t show_low_power(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct adm1021_data *data = adm1021_update_device(dev);
+ return sprintf(buf, "%d\n", data->low_power);
+}
+
+static ssize_t set_low_power(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adm1021_data *data = i2c_get_clientdata(client);
+ int low_power = simple_strtol(buf, NULL, 10) != 0;
+
+ mutex_lock(&data->update_lock);
+ if (low_power != data->low_power) {
+ int config = i2c_smbus_read_byte_data(
+ client, ADM1021_REG_CONFIG_R);
+ data->low_power = low_power;
+ i2c_smbus_write_byte_data(client, ADM1021_REG_CONFIG_W,
+ (config & 0xBF) | (low_power << 6));
+ }
+ mutex_unlock(&data->update_lock);
+
+ return count;
+}
+
+
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 0);
@@ -233,6 +260,7 @@ static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
+static DEVICE_ATTR(low_power, S_IWUSR | S_IRUGO, show_low_power, set_low_power);
static struct attribute *adm1021_attributes[] = {
&sensor_dev_attr_temp1_max.dev_attr.attr,
@@ -247,6 +275,7 @@ static struct attribute *adm1021_attributes[] = {
&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_fault.dev_attr.attr,
&dev_attr_alarms.attr,
+ &dev_attr_low_power.attr,
NULL
};
@@ -412,25 +441,27 @@ static struct adm1021_data *adm1021_update_device(struct device *dev)
dev_dbg(&client->dev, "Starting adm1021 update\n");
for (i = 0; i < 2; i++) {
- data->temp[i] = i2c_smbus_read_byte_data(client,
- ADM1021_REG_TEMP(i));
- data->temp_max[i] = i2c_smbus_read_byte_data(client,
- ADM1021_REG_TOS_R(i));
- data->temp_min[i] = i2c_smbus_read_byte_data(client,
- ADM1021_REG_THYST_R(i));
+ data->temp[i] = 1000 *
+ (s8) i2c_smbus_read_byte_data(
+ client, ADM1021_REG_TEMP(i));
+ data->temp_max[i] = 1000 *
+ (s8) i2c_smbus_read_byte_data(
+ client, ADM1021_REG_TOS_R(i));
+ data->temp_min[i] = 1000 *
+ (s8) i2c_smbus_read_byte_data(
+ client, ADM1021_REG_THYST_R(i));
}
data->alarms = i2c_smbus_read_byte_data(client,
ADM1021_REG_STATUS) & 0x7c;
if (data->type == adm1023) {
- data->remote_temp_prec =
- i2c_smbus_read_byte_data(client,
- ADM1023_REG_REM_TEMP_PREC);
- data->remote_temp_os_prec =
- i2c_smbus_read_byte_data(client,
- ADM1023_REG_REM_TOS_PREC);
- data->remote_temp_hyst_prec =
- i2c_smbus_read_byte_data(client,
- ADM1023_REG_REM_THYST_PREC);
+ /* The ADM1023 provides 3 extra bits of precision for
+ * the remote sensor in extra registers. */
+ data->temp[1] += 125 * (i2c_smbus_read_byte_data(
+ client, ADM1023_REG_REM_TEMP_PREC) >> 5);
+ data->temp_max[1] += 125 * (i2c_smbus_read_byte_data(
+ client, ADM1023_REG_REM_TOS_PREC) >> 5);
+ data->temp_min[1] += 125 * (i2c_smbus_read_byte_data(
+ client, ADM1023_REG_REM_THYST_PREC) >> 5);
data->remote_temp_offset =
i2c_smbus_read_byte_data(client,
ADM1023_REG_REM_OFFSET);