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authorJean Delvare <khali@linux-fr.org>2011-07-25 21:46:10 +0200
committerJean Delvare <khali@endymion.delvare>2011-07-25 21:46:10 +0200
commit3d30f9e69f152d8667b3b13ac6f566e6e76ef7b9 (patch)
treee4e71eb7a3d824a4c4289b5b81864788a905ddb6
parent764e043bb48b6b94f9dec228aedbd8ab08f4708b (diff)
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>
-rw-r--r--Documentation/hwmon/it873
-rw-r--r--drivers/hwmon/it87.c29
2 files changed, 31 insertions, 1 deletions
diff --git a/Documentation/hwmon/it87 b/Documentation/hwmon/it87
index 38425f0f2645..6f496a586732 100644
--- a/Documentation/hwmon/it87
+++ b/Documentation/hwmon/it87
@@ -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,
diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index 5f5247750430..d912649fac50 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -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
};