hwmon: (it87) Add chassis intrusion detection support
Add chassis intrusion detection support for all supported devices, using the standard interface. Signed-off-by: Jean Delvare <khali@linux-fr.org>
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@ -76,7 +76,8 @@ IT8718F, IT8720F, IT8721F, IT8726F, IT8758E and SiS950 chips.
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These chips are 'Super I/O chips', supporting floppy disks, infrared ports,
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joysticks and other miscellaneous stuff. For hardware monitoring, they
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include an 'environment controller' with 3 temperature sensors, 3 fan
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rotation speed sensors, 8 voltage sensors, and associated alarms.
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rotation speed sensors, 8 voltage sensors, associated alarms, and chassis
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intrusion detection.
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The IT8712F and IT8716F additionally feature VID inputs, used to report
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the Vcore voltage of the processor. The early IT8712F have 5 VID pins,
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@ -1172,6 +1172,32 @@ static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
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struct it87_data *data = it87_update_device(dev);
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return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
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}
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static ssize_t clear_intrusion(struct device *dev, struct device_attribute
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*attr, const char *buf, size_t count)
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{
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struct it87_data *data = dev_get_drvdata(dev);
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long val;
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int config;
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if (strict_strtol(buf, 10, &val) < 0 || val != 0)
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return -EINVAL;
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mutex_lock(&data->update_lock);
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config = it87_read_value(data, IT87_REG_CONFIG);
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if (config < 0) {
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count = config;
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} else {
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config |= 1 << 5;
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it87_write_value(data, IT87_REG_CONFIG, config);
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/* Invalidate cache to force re-read */
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data->valid = 0;
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}
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mutex_unlock(&data->update_lock);
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return count;
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}
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static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
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static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
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static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
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@ -1188,6 +1214,8 @@ static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
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static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
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static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
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static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
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static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR,
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show_alarm, clear_intrusion, 4);
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static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
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char *buf)
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@ -1350,6 +1378,7 @@ static struct attribute *it87_attributes[] = {
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&sensor_dev_attr_temp3_alarm.dev_attr.attr,
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&dev_attr_alarms.attr,
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&sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
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&dev_attr_name.attr,
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NULL
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};
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