trigger.h

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/* The industrial I/O core, trigger handling functions
 *
 * Copyright (c) 2008 Jonathan Cameron
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 */
#include <linux/irq.h>
#include <linux/module.h>

#ifndef _IIO_TRIGGER_H_
#define _IIO_TRIGGER_H_

struct iio_subirq {
    bool enabled;
};

struct iio_trigger_ops {
    struct module *owner;
    int (*set_trigger_state)(struct iio_trigger *trig, bool state);
    int (*try_reenable)(struct iio_trigger *trig);
    int (*validate_device)(struct iio_trigger *trig,
                   struct iio_dev *indio_dev);
};


struct iio_trigger {
    const struct iio_trigger_ops    *ops;
    int             id;
    const char          *name;
    struct device           dev;

    void                *private_data;
    struct list_head        list;
    struct list_head        alloc_list;
    int use_count;

    struct irq_chip         subirq_chip;
    int             subirq_base;

    struct iio_subirq subirqs[CONFIG_IIO_CONSUMERS_PER_TRIGGER];
    unsigned long pool[BITS_TO_LONGS(CONFIG_IIO_CONSUMERS_PER_TRIGGER)];
    struct mutex            pool_lock;
};


static inline struct iio_trigger *to_iio_trigger(struct device *d)
{
    return container_of(d, struct iio_trigger, dev);
}

static inline void iio_trigger_put(struct iio_trigger *trig)
{
    module_put(trig->ops->owner);
    put_device(&trig->dev);
}

static inline void iio_trigger_get(struct iio_trigger *trig)
{
    get_device(&trig->dev);
    __module_get(trig->ops->owner);
}

int iio_trigger_register(struct iio_trigger *trig_info);

void iio_trigger_unregister(struct iio_trigger *trig_info);

void iio_trigger_poll(struct iio_trigger *trig, s64 time);
void iio_trigger_poll_chained(struct iio_trigger *trig, s64 time);

irqreturn_t iio_trigger_generic_data_rdy_poll(int irq, void *private);

__printf(1, 2) struct iio_trigger *iio_trigger_alloc(const char *fmt, ...);
void iio_trigger_free(struct iio_trigger *trig);

#endif /* _IIO_TRIGGER_H_ */