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authorDmitry Artamonow2011-08-12 22:41:11 +0200
committerGuenter Roeck2011-10-24 20:09:32 +0200
commit363a12a49968103ea2c5493932d417d73bc099b7 (patch)
tree66dac36f101c2b7a9f03217d9d508c3231138257 /drivers/hwmon/w83627ehf.c
parentLinux 3.1 (diff)
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hwmon: (w83627ehf) add caseopen detection
Export caseopen alarm status into userspace for Winbond W83627* and Nuvoton NCT677[56] chips and implement alarm clear attribute. Second caseopen alarm on NCT6776 is also supported. Signed-off-by: Dmitry Artamonow <mad_soft@inbox.ru> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Diffstat (limited to 'drivers/hwmon/w83627ehf.c')
-rw-r--r--drivers/hwmon/w83627ehf.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c
index 36d7f270b14d..e1736b80b6b0 100644
--- a/drivers/hwmon/w83627ehf.c
+++ b/drivers/hwmon/w83627ehf.c
@@ -197,6 +197,9 @@ static const u16 W83627EHF_REG_TEMP_CONFIG[] = { 0, 0x152, 0x252, 0 };
#define W83627EHF_REG_ALARM2 0x45A
#define W83627EHF_REG_ALARM3 0x45B
+#define W83627EHF_REG_CASEOPEN_DET 0x42 /* SMI STATUS #2 */
+#define W83627EHF_REG_CASEOPEN_CLR 0x46 /* SMI MASK #3 */
+
/* SmartFan registers */
#define W83627EHF_REG_FAN_STEPUP_TIME 0x0f
#define W83627EHF_REG_FAN_STEPDOWN_TIME 0x0e
@@ -469,6 +472,7 @@ struct w83627ehf_data {
s16 temp_max[9];
s16 temp_max_hyst[9];
u32 alarms;
+ u8 caseopen;
u8 pwm_mode[4]; /* 0->DC variable voltage, 1->PWM variable duty cycle */
u8 pwm_enable[4]; /* 1->manual
@@ -874,6 +878,9 @@ static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
(w83627ehf_read_value(data,
W83627EHF_REG_ALARM3) << 16);
+ data->caseopen = w83627ehf_read_value(data,
+ W83627EHF_REG_CASEOPEN_DET);
+
data->last_updated = jiffies;
data->valid = 1;
}
@@ -1655,6 +1662,48 @@ show_vid(struct device *dev, struct device_attribute *attr, char *buf)
}
static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
+
+/* Case open detection */
+
+static ssize_t
+show_caseopen(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct w83627ehf_data *data = w83627ehf_update_device(dev);
+
+ return sprintf(buf, "%d\n",
+ !!(data->caseopen & to_sensor_dev_attr_2(attr)->index));
+}
+
+static ssize_t
+clear_caseopen(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct w83627ehf_data *data = dev_get_drvdata(dev);
+ unsigned long val;
+ u16 reg, mask;
+
+ if (strict_strtoul(buf, 10, &val) || val != 0)
+ return -EINVAL;
+
+ mask = to_sensor_dev_attr_2(attr)->nr;
+
+ mutex_lock(&data->update_lock);
+ reg = w83627ehf_read_value(data, W83627EHF_REG_CASEOPEN_CLR);
+ w83627ehf_write_value(data, W83627EHF_REG_CASEOPEN_CLR, reg | mask);
+ w83627ehf_write_value(data, W83627EHF_REG_CASEOPEN_CLR, reg & ~mask);
+ data->valid = 0; /* Force cache refresh */
+ mutex_unlock(&data->update_lock);
+
+ return count;
+}
+
+static struct sensor_device_attribute_2 sda_caseopen[] = {
+ SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_caseopen,
+ clear_caseopen, 0x80, 0x10),
+ SENSOR_ATTR_2(intrusion1_alarm, S_IWUSR | S_IRUGO, show_caseopen,
+ clear_caseopen, 0x40, 0x40),
+};
+
/*
* Driver and device management
*/
@@ -1711,6 +1760,9 @@ static void w83627ehf_device_remove_files(struct device *dev)
device_remove_file(dev, &sda_temp_type[i].dev_attr);
}
+ device_remove_file(dev, &sda_caseopen[0].dev_attr);
+ device_remove_file(dev, &sda_caseopen[1].dev_attr);
+
device_remove_file(dev, &dev_attr_name);
device_remove_file(dev, &dev_attr_cpu0_vid);
}
@@ -2269,6 +2321,16 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
goto exit_remove;
}
+ err = device_create_file(dev, &sda_caseopen[0].dev_attr);
+ if (err)
+ goto exit_remove;
+
+ if (sio_data->kind == nct6776) {
+ err = device_create_file(dev, &sda_caseopen[1].dev_attr);
+ if (err)
+ goto exit_remove;
+ }
+
err = device_create_file(dev, &dev_attr_name);
if (err)
goto exit_remove;