drivers/staging/iio/accel/adis16201_trigger.c

   1 #include <linux/interrupt.h>
   2 #include <linux/irq.h>
   3 #include <linux/mutex.h>
   4 #include <linux/device.h>
   5 #include <linux/kernel.h>
   6 #include <linux/sysfs.h>
   7 #include <linux/spi/spi.h>
   8
   9 #include "../iio.h"
  10 #include "../sysfs.h"
  11 #include "../trigger.h"
  12 #include "adis16201.h"
  13
  14 /**
  15  * adis16201_data_rdy_trigger_set_state() set datardy interrupt state
  16  **/
  17 static int adis16201_data_rdy_trigger_set_state(struct iio_trigger *trig,
  18                                                 bool state)
  19 {
  20         struct adis16201_state *st = trig->private_data;
  21         struct iio_dev *indio_dev = st->indio_dev;
  22
  23         dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
  24         return adis16201_set_irq(st->indio_dev, state);
  25 }
  26
  27 int adis16201_probe_trigger(struct iio_dev *indio_dev)
  28 {
  29         int ret;
  30         struct adis16201_state *st = indio_dev->dev_data;
  31
  32         st->trig = iio_allocate_trigger("adis16201-dev%d", indio_dev->id);
  33         if (st->trig == NULL) {
  34                 ret = -ENOMEM;
  35                 goto error_ret;
  36         }
  37         ret = request_irq(st->us->irq,
  38                           &iio_trigger_generic_data_rdy_poll,
  39                           IRQF_TRIGGER_RISING,
  40                           "adis16201",
  41                           st->trig);
  42         if (ret)
  43                 goto error_free_trig;
  44         st->trig->dev.parent = &st->us->dev;
  45         st->trig->owner = THIS_MODULE;
  46         st->trig->private_data = st;
  47         st->trig->set_trigger_state = &adis16201_data_rdy_trigger_set_state;
  48         ret = iio_trigger_register(st->trig);
  49
  50         /* select default trigger */
  51         indio_dev->trig = st->trig;
  52         if (ret)
  53                 goto error_free_irq;
  54
  55         return 0;
  56
  57 error_free_irq:
  58         free_irq(st->us->irq, st->trig);
  59 error_free_trig:
  60         iio_free_trigger(st->trig);
  61 error_ret:
  62         return ret;
  63 }
  64
  65 void adis16201_remove_trigger(struct iio_dev *indio_dev)
  66 {
  67         struct adis16201_state *state = indio_dev->dev_data;
  68
  69         iio_trigger_unregister(state->trig);
  70         free_irq(state->us->irq, state->trig);
  71         iio_free_trigger(state->trig);
  72 }