83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/spi/spi.h>
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#include <linux/export.h>
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#include "../iio.h"
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#include "../trigger.h"
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#include "adis16240.h"
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/**
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* adis16240_data_rdy_trig_poll() the event handler for the data rdy trig
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**/
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static irqreturn_t adis16240_data_rdy_trig_poll(int irq, void *trig)
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{
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iio_trigger_poll(trig, iio_get_time_ns());
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return IRQ_HANDLED;
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}
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/**
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* adis16240_data_rdy_trigger_set_state() set datardy interrupt state
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**/
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static int adis16240_data_rdy_trigger_set_state(struct iio_trigger *trig,
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bool state)
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{
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struct iio_dev *indio_dev = trig->private_data;
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dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
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return adis16240_set_irq(indio_dev, state);
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}
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static const struct iio_trigger_ops adis16240_trigger_ops = {
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.owner = THIS_MODULE,
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.set_trigger_state = &adis16240_data_rdy_trigger_set_state,
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};
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int adis16240_probe_trigger(struct iio_dev *indio_dev)
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{
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int ret;
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struct adis16240_state *st = iio_priv(indio_dev);
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st->trig = iio_allocate_trigger("adis16240-dev%d", indio_dev->id);
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if (st->trig == NULL) {
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ret = -ENOMEM;
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goto error_ret;
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}
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ret = request_irq(st->us->irq,
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adis16240_data_rdy_trig_poll,
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IRQF_TRIGGER_RISING,
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"adis16240",
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st->trig);
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if (ret)
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goto error_free_trig;
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st->trig->dev.parent = &st->us->dev;
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st->trig->ops = &adis16240_trigger_ops;
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st->trig->private_data = indio_dev;
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ret = iio_trigger_register(st->trig);
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/* select default trigger */
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indio_dev->trig = st->trig;
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if (ret)
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goto error_free_irq;
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return 0;
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error_free_irq:
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free_irq(st->us->irq, st->trig);
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error_free_trig:
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iio_free_trigger(st->trig);
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error_ret:
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return ret;
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}
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void adis16240_remove_trigger(struct iio_dev *indio_dev)
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{
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struct adis16240_state *st = iio_priv(indio_dev);
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iio_trigger_unregister(st->trig);
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free_irq(st->us->irq, st->trig);
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iio_free_trigger(st->trig);
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}
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