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Commit 090a7f8e authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (lm95241) Add support for fault attributes 



The chip reports if remote diodes are present, which can be used for
the fault attrributes.

Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent f48ccb26

drivers/hwmon/lm95241.c

+19 −1
Original line number Diff line number Diff line
@@ -70,6 +70,8 @@ static const unsigned short normal_i2c[] = { 
#define R2DF_MASK (0x01 << (R2DF_SHIFT))

#define R1FE_MASK 0x01

#define R2FE_MASK 0x05

#define R1DM 0x01

#define R2DM 0x02

#define TT1_SHIFT 0

#define TT2_SHIFT 4

#define TT_OFF 0
@@ -97,7 +99,7 @@ struct lm95241_data { 
	char valid;		/* zero until following fields are valid */

	/* registers values */

	u8 temp[ARRAY_SIZE(lm95241_reg_address)];

	u8 config, model, trutherm;

	u8 status, config, model, trutherm;

};



/* Conversions */
@@ -130,6 +132,9 @@ static struct lm95241_data *lm95241_update_device(struct device *dev) 
			data->temp[i]

			  = i2c_smbus_read_byte_data(client,

						     lm95241_reg_address[i]);



		data->status = i2c_smbus_read_byte_data(client,

							LM95241_REG_R_STATUS);

		data->last_updated = jiffies;

		data->valid = 1;

	}
@@ -274,6 +279,15 @@ static ssize_t set_max(struct device *dev, struct device_attribute *attr, 
	return count;

}



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

			  char *buf)

{

	struct lm95241_data *data = lm95241_update_device(dev);



	return snprintf(buf, PAGE_SIZE - 1, "%d",

			!!(data->status & to_sensor_dev_attr(attr)->index));

}



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

			     char *buf)

{
@@ -335,6 +349,8 @@ static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_max, set_max, 
			  R1DF_MASK);

static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_max, set_max,

			  R2DF_MASK);

static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_fault, NULL, R1DM);

static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_fault, NULL, R2DM);

static DEVICE_ATTR(update_interval, S_IWUSR | S_IRUGO, show_interval,

		   set_interval);
@@ -348,6 +364,8 @@ static struct attribute *lm95241_attrs[] = { 
	&sensor_dev_attr_temp3_min.dev_attr.attr,

	&sensor_dev_attr_temp2_max.dev_attr.attr,

	&sensor_dev_attr_temp3_max.dev_attr.attr,

	&sensor_dev_attr_temp2_fault.dev_attr.attr,

	&sensor_dev_attr_temp3_fault.dev_attr.attr,

	&dev_attr_update_interval.attr,

	NULL

};