static void therm_est_work_func(struct work_struct *work)
{
int i, j, index, sum = 0;
long temp;
struct delayed_work *dwork = container_of(work,
struct delayed_work, work);
struct therm_estimator *est = container_of(dwork,
struct therm_estimator,
therm_est_work);
if ((est->ntemp == HIST_UNINIT) && therm_est_init_history(est)) {
est->cur_temp = DEFAULT_TEMP;
goto out;
}
for (i = 0; i < est->ndevs; i++) {
if (therm_est_subdev_get_temp(est->devs[i].dev_data, &temp)) {
index = (est->ntemp > 0) ? (est->ntemp - 1) : 0;
temp = est->devs[i].hist[(index % HIST_LEN)];
}
est->devs[i].hist[(est->ntemp % HIST_LEN)] = temp;
}
for (i = 0; i < est->ndevs; i++) {
for (j = 0; j < HIST_LEN; j++) {
index = (est->ntemp - j + HIST_LEN) % HIST_LEN;
sum += est->devs[i].hist[index] *
est->devs[i].coeffs[j];
}
}
est->cur_temp = sum / 100 + est->toffset;
est->ntemp++;
out:
if (est->thz && ((est->cur_temp < est->low_limit) ||
(est->cur_temp >= est->high_limit))) {
thermal_zone_device_update(est->thz);
therm_est_update_timer_trips(est);
therm_est_update_limits(est);
}
queue_delayed_work(est->workqueue, &est->therm_est_work,
msecs_to_jiffies(est->polling_period));
}
static int therm_est_init_history(struct therm_estimator *est)
{
int i, j;
struct therm_est_subdevice *dev;
long temp;
for (i = 0; i < est->ndevs; i++) {
dev = &est->devs[i];
if (therm_est_subdev_get_temp(dev->dev_data, &temp))
return -EINVAL;
for (j = 0; j < HIST_LEN; j++)
dev->hist[j] = temp;
}
return 0;
}
static int therm_est_init_history(struct therm_estimator *est)
{
int i, j;
struct therm_est_subdevice *dev;
long temp;
int ret;
for (i = 0; i < est->ndevs; i++) {
dev = &est->devs[i];
ret = therm_est_subdev_get_temp(dev->dev_data, &temp);
if (ret < 0)
return ret;
for (j = 0; j < HIST_LEN; j++)
dev->hist[j] = temp;
}
est->ntemp = 0;
return 0;
}