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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>
This commit is contained in:
Dmitry Artamonow 2011-08-12 16:41:11 -04:00 committed by Guenter Roeck
parent c3b92c8787
commit 363a12a499
1 changed files with 62 additions and 0 deletions
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62
drivers/hwmon/w83627ehf.c
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@ -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;