static ssize_t show_fan(struct device *dev, struct device_attribute *da,
char *buf)
{
struct g760a_data *data = g760a_update_client(dev);
unsigned int rpm = 0;
mutex_lock(&data->update_lock);
if (!(data->fan_sta & G760A_REG_FAN_STA_RPM_LOW))
rpm = rpm_from_cnt(data->act_cnt, data->clk, data->fan_div);
mutex_unlock(&data->update_lock);
return sprintf(buf, "%d\n", rpm);
}
/*
* Read and write function for fan1_target sysfs file. Get/set the fan speed in
* closed-loop mode. Speed is given as a RPM value; then the chip will regulate
* the fan speed using pulses from fan tachometer.
*
* Refer to rpm_from_cnt() implementation above to get info about count number
* calculation.
*
* Also note that due to rounding errors it is possible that you don't read
* back exactly the value you have set.
*/
static ssize_t get_fan_target(struct device *dev, struct device_attribute *da,
char *buf)
{
struct g762_data *data = g762_update_client(dev);
unsigned int rpm;
if (IS_ERR(data))
return PTR_ERR(data);
mutex_lock(&data->update_lock);
rpm = rpm_from_cnt(data->set_cnt, data->clk_freq,
G762_PULSE_FROM_REG(data->fan_cmd1),
G762_CLKDIV_FROM_REG(data->fan_cmd1),
G762_GEARMULT_FROM_REG(data->fan_cmd2));
mutex_unlock(&data->update_lock);
return sprintf(buf, "%u\n", rpm);
}
/*
* Read function for fan1_input sysfs file. Return current fan RPM value, or
* 0 if fan is out of control.
*/
static ssize_t get_fan_rpm(struct device *dev, struct device_attribute *da,
char *buf)
{
struct g762_data *data = g762_update_client(dev);
unsigned int rpm = 0;
if (IS_ERR(data))
return PTR_ERR(data);
mutex_lock(&data->update_lock);
/* reverse logic: fan out of control reporting is enabled low */
if (data->fan_sta & G762_REG_FAN_STA_OOC) {
rpm = rpm_from_cnt(data->act_cnt, data->clk_freq,
G762_PULSE_FROM_REG(data->fan_cmd1),
G762_CLKDIV_FROM_REG(data->fan_cmd1),
G762_GEARMULT_FROM_REG(data->fan_cmd2));
}
mutex_unlock(&data->update_lock);
return sprintf(buf, "%u\n", rpm);
}