Source of ltc4222.c - linux-imx - PHYTEC BitBucket (Stash)

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         * in mOhm.
         */
        val = DIV_ROUND_CLOSEST(val * 125, 2);
        break;
    default:
        return -EINVAL;
    }
    return val;
}
​
static ssize_t ltc4222_show_value(struct device *dev,
static ssize_t ltc4222_value_show(struct device *dev,
                  struct device_attribute *da, char *buf)
{
    struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
    int value;
​
    value = ltc4222_get_value(dev, attr->index);
    if (value < 0)
        return value;
    return snprintf(buf, PAGE_SIZE, "%d\n", value);
}
​
static ssize_t ltc4222_show_bool(struct device *dev,
static ssize_t ltc4222_bool_show(struct device *dev,
                 struct device_attribute *da, char *buf)
{
    struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(da);
    struct regmap *regmap = dev_get_drvdata(dev);
    unsigned int fault;
    int ret;
​
    ret = regmap_read(regmap, attr->nr, &fault);
    if (ret < 0)
        return ret;
    fault &= attr->index;
    if (fault)      /* Clear reported faults in chip register */
        regmap_update_bits(regmap, attr->nr, attr->index, 0);
​
    return snprintf(buf, PAGE_SIZE, "%d\n", !!fault);
}
​
/* Voltages */
static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, ltc4222_show_value, NULL,
              LTC4222_SOURCE1);
static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, ltc4222_show_value, NULL,
              LTC4222_ADIN1);
static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, ltc4222_show_value, NULL,
              LTC4222_SOURCE2);
static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, ltc4222_show_value, NULL,
              LTC4222_ADIN2);
static SENSOR_DEVICE_ATTR_RO(in1_input, ltc4222_value, LTC4222_SOURCE1);
static SENSOR_DEVICE_ATTR_RO(in2_input, ltc4222_value, LTC4222_ADIN1);
static SENSOR_DEVICE_ATTR_RO(in3_input, ltc4222_value, LTC4222_SOURCE2);
static SENSOR_DEVICE_ATTR_RO(in4_input, ltc4222_value, LTC4222_ADIN2);
​
/*
 * Voltage alarms
 * UV/OV faults are associated with the input voltage, and power bad and fet
 * faults are associated with the output voltage.
 */
static SENSOR_DEVICE_ATTR_2(in1_min_alarm, S_IRUGO, ltc4222_show_bool, NULL,
                LTC4222_FAULT1, FAULT_UV);
static SENSOR_DEVICE_ATTR_2(in1_max_alarm, S_IRUGO, ltc4222_show_bool, NULL,
                LTC4222_FAULT1, FAULT_OV);
static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, ltc4222_show_bool, NULL,
                LTC4222_FAULT1, FAULT_POWER_BAD | FAULT_FET_BAD);
​
static SENSOR_DEVICE_ATTR_2(in3_min_alarm, S_IRUGO, ltc4222_show_bool, NULL,
                LTC4222_FAULT2, FAULT_UV);
static SENSOR_DEVICE_ATTR_2(in3_max_alarm, S_IRUGO, ltc4222_show_bool, NULL,
                LTC4222_FAULT2, FAULT_OV);
static SENSOR_DEVICE_ATTR_2(in4_alarm, S_IRUGO, ltc4222_show_bool, NULL,
                LTC4222_FAULT2, FAULT_POWER_BAD | FAULT_FET_BAD);
static SENSOR_DEVICE_ATTR_2_RO(in1_min_alarm, ltc4222_bool, LTC4222_FAULT1,
                   FAULT_UV);
static SENSOR_DEVICE_ATTR_2_RO(in1_max_alarm, ltc4222_bool, LTC4222_FAULT1,
                   FAULT_OV);
static SENSOR_DEVICE_ATTR_2_RO(in2_alarm, ltc4222_bool, LTC4222_FAULT1,
                   FAULT_POWER_BAD | FAULT_FET_BAD);
​
static SENSOR_DEVICE_ATTR_2_RO(in3_min_alarm, ltc4222_bool, LTC4222_FAULT2,
                   FAULT_UV);
static SENSOR_DEVICE_ATTR_2_RO(in3_max_alarm, ltc4222_bool, LTC4222_FAULT2,
                   FAULT_OV);
static SENSOR_DEVICE_ATTR_2_RO(in4_alarm, ltc4222_bool, LTC4222_FAULT2,
                   FAULT_POWER_BAD | FAULT_FET_BAD);
​
/* Current (via sense resistor) */
static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, ltc4222_show_value, NULL,
              LTC4222_SENSE1);
static SENSOR_DEVICE_ATTR(curr2_input, S_IRUGO, ltc4222_show_value, NULL,
              LTC4222_SENSE2);
static SENSOR_DEVICE_ATTR_RO(curr1_input, ltc4222_value, LTC4222_SENSE1);
static SENSOR_DEVICE_ATTR_RO(curr2_input, ltc4222_value, LTC4222_SENSE2);
​
/* Overcurrent alarm */
static SENSOR_DEVICE_ATTR_2(curr1_max_alarm, S_IRUGO, ltc4222_show_bool, NULL,
                LTC4222_FAULT1, FAULT_OC);
static SENSOR_DEVICE_ATTR_2(curr2_max_alarm, S_IRUGO, ltc4222_show_bool, NULL,
                LTC4222_FAULT2, FAULT_OC);
static SENSOR_DEVICE_ATTR_2_RO(curr1_max_alarm, ltc4222_bool, LTC4222_FAULT1,
                   FAULT_OC);
static SENSOR_DEVICE_ATTR_2_RO(curr2_max_alarm, ltc4222_bool, LTC4222_FAULT2,
                   FAULT_OC);
​
static struct attribute *ltc4222_attrs[] = {
    &sensor_dev_attr_in1_input.dev_attr.attr,
    &sensor_dev_attr_in1_min_alarm.dev_attr.attr,
    &sensor_dev_attr_in1_max_alarm.dev_attr.attr,
    &sensor_dev_attr_in2_input.dev_attr.attr,
    &sensor_dev_attr_in2_alarm.dev_attr.attr,
    &sensor_dev_attr_in3_input.dev_attr.attr,
    &sensor_dev_attr_in3_min_alarm.dev_attr.attr,
    &sensor_dev_attr_in3_max_alarm.dev_attr.attr,