linux-imx

 *

 * Return: (POLLIN | POLLRDNORM) if data is available for reading

 *     or 0 for other cases

 */

unsigned int iio_buffer_poll(struct file *filp,

                 struct poll_table_struct *wait)

{

    struct iio_dev *indio_dev = filp->private_data;

    struct iio_buffer *rb = indio_dev->buffer;

​

        return 0;

​

    poll_wait(filp, &rb->pollq, wait);

    if (iio_buffer_ready(indio_dev, rb, rb->watermark, 0))

        return POLLIN | POLLRDNORM;

    return 0;

}

​

/**

 * iio_buffer_wakeup_poll - Wakes up the buffer waitqueue