static int iio_bfin_tmr_trigger_remove(struct platform_device *pdev)
{
struct bfin_tmr_state *st = platform_get_drvdata(pdev);
disable_gptimers(st->t->bit);
if (st->output_enable)
peripheral_free(st->t->pin);
free_irq(st->irq, st);
iio_trigger_unregister(st->trig);
iio_trigger_put(st->trig);
return 0;
}
static int iio_sysfs_trigger_probe(int id)
{
struct iio_sysfs_trig *t;
int ret;
bool foundit = false;
mutex_lock(&iio_sysfs_trig_list_mut);
list_for_each_entry(t, &iio_sysfs_trig_list, l)
if (id == t->id) {
foundit = true;
break;
}
if (foundit) {
ret = -EINVAL;
goto out1;
}
t = kmalloc(sizeof(*t), GFP_KERNEL);
if (t == NULL) {
ret = -ENOMEM;
goto out1;
}
t->id = id;
t->trig = iio_trigger_alloc("sysfstrig%d", id);
if (!t->trig) {
ret = -ENOMEM;
goto free_t;
}
t->trig->dev.groups = iio_sysfs_trigger_attr_groups;
t->trig->ops = &iio_sysfs_trigger_ops;
t->trig->dev.parent = &iio_sysfs_trig_dev;
iio_trigger_set_drvdata(t->trig, t);
init_irq_work(&t->work, iio_sysfs_trigger_work);
ret = iio_trigger_register(t->trig);
if (ret)
goto out2;
list_add(&t->l, &iio_sysfs_trig_list);
__module_get(THIS_MODULE);
mutex_unlock(&iio_sysfs_trig_list_mut);
return 0;
out2:
iio_trigger_put(t->trig);
free_t:
kfree(t);
out1:
mutex_unlock(&iio_sysfs_trig_list_mut);
return ret;
}
static int iio_bfin_tmr_trigger_probe(struct platform_device *pdev)
{
struct iio_bfin_timer_trigger_pdata *pdata = pdev->dev.platform_data;
struct bfin_tmr_state *st;
unsigned int config;
int ret;
st = kzalloc(sizeof(*st), GFP_KERNEL);
if (st == NULL) {
ret = -ENOMEM;
goto out;
}
st->irq = platform_get_irq(pdev, 0);
if (!st->irq) {
dev_err(&pdev->dev, "No IRQs specified");
ret = -ENODEV;
goto out1;
}
ret = iio_bfin_tmr_get_number(st->irq);
if (ret < 0)
goto out1;
st->timer_num = ret;
st->t = &iio_bfin_timer_code[st->timer_num];
st->trig = iio_trigger_alloc("bfintmr%d", st->timer_num);
if (!st->trig) {
ret = -ENOMEM;
goto out1;
}
st->trig->private_data = st;
st->trig->ops = &iio_bfin_tmr_trigger_ops;
st->trig->dev.groups = iio_bfin_tmr_trigger_attr_groups;
ret = iio_trigger_register(st->trig);
if (ret)
goto out2;
ret = request_irq(st->irq, iio_bfin_tmr_trigger_isr,
0, st->trig->name, st);
if (ret) {
dev_err(&pdev->dev,
"request IRQ-%d failed", st->irq);
goto out4;
}
config = PWM_OUT | PERIOD_CNT | IRQ_ENA;
if (pdata && pdata->output_enable) {
unsigned long long val;
st->output_enable = true;
ret = peripheral_request(st->t->pin, st->trig->name);
if (ret)
goto out_free_irq;
val = (unsigned long long)get_sclk() * pdata->duty_ns;
do_div(val, NSEC_PER_SEC);
st->duty = val;
/**
* The interrupt will be generated at the end of the period,
* since we want the interrupt to be generated at end of the
* pulse we invert both polarity and duty cycle, so that the
* pulse will be generated directly before the interrupt.
*/
if (pdata->active_low)
config |= PULSE_HI;
} else {
st->duty = 1;
config |= OUT_DIS;
}
set_gptimer_config(st->t->id, config);
dev_info(&pdev->dev, "iio trigger Blackfin TMR%d, IRQ-%d",
st->timer_num, st->irq);
platform_set_drvdata(pdev, st);
return 0;
out_free_irq:
free_irq(st->irq, st);
out4:
iio_trigger_unregister(st->trig);
out2:
iio_trigger_put(st->trig);
out1:
kfree(st);
out:
return ret;
}
