linux-imx

/* The industrial I/O core in kernel channel mapping

 *

 * Copyright (c) 2011 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/err.h>

#include <linux/export.h>

#include <linux/slab.h>

#include <linux/mutex.h>

#include <linux/of.h>

​

#include <linux/iio/iio.h>

#include "iio_core.h"

#include <linux/iio/machine.h>

#include <linux/iio/driver.h>

#include <linux/iio/consumer.h>

​

struct iio_map_internal {

    struct iio_dev *indio_dev;

    struct iio_map *map;

    struct list_head l;

};

​

static LIST_HEAD(iio_map_list);

static DEFINE_MUTEX(iio_map_list_lock);

​

int iio_map_array_register(struct iio_dev *indio_dev, struct iio_map *maps)

{

    int i = 0, ret = 0;

    struct iio_map_internal *mapi;

​

    if (maps == NULL)

        return 0;

​

    mutex_lock(&iio_map_list_lock);

    while (maps[i].consumer_dev_name != NULL) {

        mapi = kzalloc(sizeof(*mapi), GFP_KERNEL);

        if (mapi == NULL) {

            ret = -ENOMEM;

            goto error_ret;

        }

        mapi->map = &maps[i];

        mapi->indio_dev = indio_dev;

        list_add_tail(&mapi->l, &iio_map_list);

        i++;

    }

error_ret:

    mutex_unlock(&iio_map_list_lock);

​

    return ret;

}

EXPORT_SYMBOL_GPL(iio_map_array_register);

​

​

/*

 * Remove all map entries associated with the given iio device

 */

int iio_map_array_unregister(struct iio_dev *indio_dev)

{

    int ret = -ENODEV;