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Commit 3d30f9e6 authored by Jean Delvare's avatar Jean Delvare Committed by Jean Delvare
Browse files

hwmon: (it87) Add chassis intrusion detection support 



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

Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
parent 764e043b

Documentation/hwmon/it87

+2 −1
Original line number Diff line number Diff line
@@ -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,

drivers/hwmon/it87.c

+29 −0
Original line number Diff line number Diff line
@@ -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

};