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Commit 363a12a4 authored by Dmitry Artamonow's avatar Dmitry Artamonow Committed by Guenter Roeck
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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: default avatarDmitry Artamonow <mad_soft@inbox.ru>
Signed-off-by: default avatarGuenter Roeck <guenter.roeck@ericsson.com>
parent c3b92c87

drivers/hwmon/w83627ehf.c

+62 −0
Original line number Diff line number Diff line
@@ -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;