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Commit 49dc9efe authored by Ira Snyder's avatar Ira Snyder Committed by Jean Delvare
Browse files

hwmon: (adm1031) Add sysfs files for temperature offsets 



The ADM1030/ADM1031 chips have temperature offset registers, for both the
local and remote temperature sensors. Following the example set forth in
the LM90/ADM1032 driver, expose the offset registers to userspace.

Signed-off-by: default avatarIra W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
parent 7fa07729

drivers/hwmon/adm1031.c

+40 −0
Original line number Diff line number Diff line
@@ -37,6 +37,7 @@ 
#define ADM1031_REG_PWM			(0x22)

#define ADM1031_REG_FAN_MIN(nr)		(0x10 + (nr))



#define ADM1031_REG_TEMP_OFFSET(nr)	(0x0d + (nr))

#define ADM1031_REG_TEMP_MAX(nr)	(0x14 + 4 * (nr))

#define ADM1031_REG_TEMP_MIN(nr)	(0x15 + 4 * (nr))

#define ADM1031_REG_TEMP_CRIT(nr)	(0x16 + 4 * (nr))
@@ -93,6 +94,7 @@ struct adm1031_data { 
	u8 auto_temp_min[3];

	u8 auto_temp_off[3];

	u8 auto_temp_max[3];

	s8 temp_offset[3];

	s8 temp_min[3];

	s8 temp_max[3];

	s8 temp_crit[3];
@@ -145,6 +147,10 @@ adm1031_write_value(struct i2c_client *client, u8 reg, unsigned int value) 


#define TEMP_FROM_REG_EXT(val, ext)	(TEMP_FROM_REG(val) + (ext) * 125)



#define TEMP_OFFSET_TO_REG(val)		(TEMP_TO_REG(val) & 0x8f)

#define TEMP_OFFSET_FROM_REG(val)	TEMP_FROM_REG((val) < 0 ? \

						      (val) | 0x70 : (val))



#define FAN_FROM_REG(reg, div)		((reg) ? (11250 * 60) / ((reg) * (div)) : 0)



static int FAN_TO_REG(int reg, int div)
@@ -585,6 +591,14 @@ static ssize_t show_temp(struct device *dev, 
	    (((data->ext_temp[nr] >> ((nr - 1) * 3)) & 7));

	return sprintf(buf, "%d\n", TEMP_FROM_REG_EXT(data->temp[nr], ext));

}

static ssize_t show_temp_offset(struct device *dev,

				struct device_attribute *attr, char *buf)

{

	int nr = to_sensor_dev_attr(attr)->index;

	struct adm1031_data *data = adm1031_update_device(dev);

	return sprintf(buf, "%d\n",

		       TEMP_OFFSET_FROM_REG(data->temp_offset[nr]));

}

static ssize_t show_temp_min(struct device *dev,

			     struct device_attribute *attr, char *buf)

{
@@ -606,6 +620,24 @@ static ssize_t show_temp_crit(struct device *dev, 
	struct adm1031_data *data = adm1031_update_device(dev);

	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit[nr]));

}

static ssize_t set_temp_offset(struct device *dev,

			       struct device_attribute *attr, const char *buf,

			       size_t count)

{

	struct i2c_client *client = to_i2c_client(dev);

	struct adm1031_data *data = i2c_get_clientdata(client);

	int nr = to_sensor_dev_attr(attr)->index;

	int val;



	val = simple_strtol(buf, NULL, 10);

	val = SENSORS_LIMIT(val, -15000, 15000);

	mutex_lock(&data->update_lock);

	data->temp_offset[nr] = TEMP_OFFSET_TO_REG(val);

	adm1031_write_value(client, ADM1031_REG_TEMP_OFFSET(nr),

			    data->temp_offset[nr]);

	mutex_unlock(&data->update_lock);

	return count;

}

static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,

			    const char *buf, size_t count)

{
@@ -661,6 +693,8 @@ static ssize_t set_temp_crit(struct device *dev, struct device_attribute *attr, 
#define temp_reg(offset)						\

static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO,		\

		show_temp, NULL, offset - 1);				\

static SENSOR_DEVICE_ATTR(temp##offset##_offset, S_IRUGO | S_IWUSR,	\

		show_temp_offset, set_temp_offset, offset - 1);		\

static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR,	\

		show_temp_min, set_temp_min, offset - 1);		\

static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,	\
@@ -714,6 +748,7 @@ static struct attribute *adm1031_attributes[] = { 
	&sensor_dev_attr_pwm1.dev_attr.attr,

	&sensor_dev_attr_auto_fan1_channel.dev_attr.attr,

	&sensor_dev_attr_temp1_input.dev_attr.attr,

	&sensor_dev_attr_temp1_offset.dev_attr.attr,

	&sensor_dev_attr_temp1_min.dev_attr.attr,

	&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,

	&sensor_dev_attr_temp1_max.dev_attr.attr,
@@ -721,6 +756,7 @@ static struct attribute *adm1031_attributes[] = { 
	&sensor_dev_attr_temp1_crit.dev_attr.attr,

	&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,

	&sensor_dev_attr_temp2_input.dev_attr.attr,

	&sensor_dev_attr_temp2_offset.dev_attr.attr,

	&sensor_dev_attr_temp2_min.dev_attr.attr,

	&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,

	&sensor_dev_attr_temp2_max.dev_attr.attr,
@@ -757,6 +793,7 @@ static struct attribute *adm1031_attributes_opt[] = { 
	&sensor_dev_attr_pwm2.dev_attr.attr,

	&sensor_dev_attr_auto_fan2_channel.dev_attr.attr,

	&sensor_dev_attr_temp3_input.dev_attr.attr,

	&sensor_dev_attr_temp3_offset.dev_attr.attr,

	&sensor_dev_attr_temp3_min.dev_attr.attr,

	&sensor_dev_attr_temp3_min_alarm.dev_attr.attr,

	&sensor_dev_attr_temp3_max.dev_attr.attr,
@@ -937,6 +974,9 @@ static struct adm1031_data *adm1031_update_device(struct device *dev) 
			}

			data->temp[chan] = newh;



			data->temp_offset[chan] =

			    adm1031_read_value(client,

					       ADM1031_REG_TEMP_OFFSET(chan));

			data->temp_min[chan] =

			    adm1031_read_value(client,

					       ADM1031_REG_TEMP_MIN(chan));