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>
diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index 5f52477..d912649 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -1172,6 +1172,32 @@
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(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 @@
&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
};