Source of smsc47b397.c - linux-imx - PHYTEC BitBucket (Stash)

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/*
 * TEMP: 0.001C/bit (-128C to +127C)
 * REG: 1C/bit, two's complement
 */
static int temp_from_reg(u8 reg)
{
    return (s8)reg * 1000;
}
​
static ssize_t show_temp(struct device *dev, struct device_attribute
             *devattr, char *buf)
static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
             char *buf)
{
    struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
    struct smsc47b397_data *data = smsc47b397_update_device(dev);
    return sprintf(buf, "%d\n", temp_from_reg(data->temp[attr->index]));
}
​
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3);
​
/*
 * FAN: 1 RPM/bit
 * REG: count of 90kHz pulses / revolution
 */
static int fan_from_reg(u16 reg)
{
    if (reg == 0 || reg == 0xffff)
        return 0;
    return 90000 * 60 / reg;
}
​
static ssize_t show_fan(struct device *dev, struct device_attribute
            *devattr, char *buf)
static ssize_t fan_show(struct device *dev, struct device_attribute *devattr,
            char *buf)
{
    struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
    struct smsc47b397_data *data = smsc47b397_update_device(dev);
    return sprintf(buf, "%d\n", fan_from_reg(data->fan[attr->index]));
}
static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2);
static SENSOR_DEVICE_ATTR_RO(fan4_input, fan, 3);
​
static struct attribute *smsc47b397_attrs[] = {
    &sensor_dev_attr_temp1_input.dev_attr.attr,
    &sensor_dev_attr_temp2_input.dev_attr.attr,
    &sensor_dev_attr_temp3_input.dev_attr.attr,
    &sensor_dev_attr_temp4_input.dev_attr.attr,
    &sensor_dev_attr_fan1_input.dev_attr.attr,
    &sensor_dev_attr_fan2_input.dev_attr.attr,
    &sensor_dev_attr_fan3_input.dev_attr.attr,
    &sensor_dev_attr_fan4_input.dev_attr.attr,