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: Guenter Roeck <linux@roeck-us.net>
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@ -70,6 +70,8 @@ static const unsigned short normal_i2c[] = {
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#define R2DF_MASK (0x01 << (R2DF_SHIFT))
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#define R2DF_MASK (0x01 << (R2DF_SHIFT))
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#define R1FE_MASK 0x01
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#define R1FE_MASK 0x01
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#define R2FE_MASK 0x05
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#define R2FE_MASK 0x05
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#define R1DM 0x01
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#define R2DM 0x02
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#define TT1_SHIFT 0
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#define TT1_SHIFT 0
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#define TT2_SHIFT 4
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#define TT2_SHIFT 4
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#define TT_OFF 0
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#define TT_OFF 0
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@ -97,7 +99,7 @@ struct lm95241_data {
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char valid; /* zero until following fields are valid */
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char valid; /* zero until following fields are valid */
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/* registers values */
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/* registers values */
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u8 temp[ARRAY_SIZE(lm95241_reg_address)];
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u8 temp[ARRAY_SIZE(lm95241_reg_address)];
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u8 config, model, trutherm;
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u8 status, config, model, trutherm;
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};
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};
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/* Conversions */
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/* Conversions */
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@ -130,6 +132,9 @@ static struct lm95241_data *lm95241_update_device(struct device *dev)
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data->temp[i]
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data->temp[i]
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= i2c_smbus_read_byte_data(client,
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= i2c_smbus_read_byte_data(client,
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lm95241_reg_address[i]);
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lm95241_reg_address[i]);
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data->status = i2c_smbus_read_byte_data(client,
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LM95241_REG_R_STATUS);
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data->last_updated = jiffies;
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data->last_updated = jiffies;
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data->valid = 1;
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data->valid = 1;
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}
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}
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@ -274,6 +279,15 @@ static ssize_t set_max(struct device *dev, struct device_attribute *attr,
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return count;
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return count;
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}
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}
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static ssize_t show_fault(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct lm95241_data *data = lm95241_update_device(dev);
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return snprintf(buf, PAGE_SIZE - 1, "%d",
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!!(data->status & to_sensor_dev_attr(attr)->index));
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}
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static ssize_t show_interval(struct device *dev, struct device_attribute *attr,
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static ssize_t show_interval(struct device *dev, struct device_attribute *attr,
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char *buf)
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char *buf)
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{
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{
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@ -335,6 +349,8 @@ static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_max, set_max,
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R1DF_MASK);
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R1DF_MASK);
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static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_max, set_max,
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static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_max, set_max,
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R2DF_MASK);
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R2DF_MASK);
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static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_fault, NULL, R1DM);
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static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_fault, NULL, R2DM);
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static DEVICE_ATTR(update_interval, S_IWUSR | S_IRUGO, show_interval,
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static DEVICE_ATTR(update_interval, S_IWUSR | S_IRUGO, show_interval,
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set_interval);
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set_interval);
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@ -348,6 +364,8 @@ static struct attribute *lm95241_attrs[] = {
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&sensor_dev_attr_temp3_min.dev_attr.attr,
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&sensor_dev_attr_temp3_min.dev_attr.attr,
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&sensor_dev_attr_temp2_max.dev_attr.attr,
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&sensor_dev_attr_temp2_max.dev_attr.attr,
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&sensor_dev_attr_temp3_max.dev_attr.attr,
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&sensor_dev_attr_temp3_max.dev_attr.attr,
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&sensor_dev_attr_temp2_fault.dev_attr.attr,
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&sensor_dev_attr_temp3_fault.dev_attr.attr,
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&dev_attr_update_interval.attr,
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&dev_attr_update_interval.attr,
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NULL
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NULL
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};
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};
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