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hwmon: (it87) Add chassis intrusion detection support

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Add chassis intrusion detection support for all supported devices,
using the standard interface.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Jean Delvare 2011-07-25 21:46:10 +02:00 committed by Jean Delvare
parent 764e043bb4
commit 3d30f9e69f
2 changed files with 31 additions and 1 deletions
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3
Documentation/hwmon/it87
View File

@ -76,7 +76,8 @@ IT8718F, IT8720F, IT8721F, IT8726F, IT8758E and SiS950 chips.
These chips are 'Super I/O chips', supporting floppy disks, infrared ports,
joysticks and other miscellaneous stuff. For hardware monitoring, they
include an 'environment controller' with 3 temperature sensors, 3 fan
rotation speed sensors, 8 voltage sensors, and associated alarms.
rotation speed sensors, 8 voltage sensors, associated alarms, and chassis
intrusion detection.
The IT8712F and IT8716F additionally feature VID inputs, used to report
the Vcore voltage of the processor. The early IT8712F have 5 VID pins,

29
drivers/hwmon/it87.c
View File

@ -1172,6 +1172,32 @@ static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
}
static ssize_t clear_intrusion(struct device *dev, struct device_attribute
*attr, const char *buf, size_t count)
{
struct it87_data *data = dev_get_drvdata(dev);
long val;
int config;
if (strict_strtol(buf, 10, &val) < 0 || val != 0)
return -EINVAL;
mutex_lock(&data->update_lock);
config = it87_read_value(data, IT87_REG_CONFIG);
if (config < 0) {
count = config;
} else {
config |= 1 << 5;
it87_write_value(data, IT87_REG_CONFIG, config);
/* Invalidate cache to force re-read */
data->valid = 0;
}
mutex_unlock(&data->update_lock);
return count;
}
static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
@ -1188,6 +1214,8 @@ static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR,
show_alarm, clear_intrusion, 4);
static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
char *buf)
@ -1350,6 +1378,7 @@ static struct attribute *it87_attributes[] = {
&sensor_dev_attr_temp3_alarm.dev_attr.attr,
&dev_attr_alarms.attr,
&sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
&dev_attr_name.attr,
NULL
};