static int yas_probe_buffer(struct iio_dev *indio_dev)
{
int ret;
struct iio_buffer *buffer;
buffer = iio_kfifo_allocate(indio_dev);
if (!buffer) {
ret = -ENOMEM;
goto error_ret;
}
buffer->scan_timestamp = true;
indio_dev->buffer = buffer;
indio_dev->setup_ops = &yas_buffer_setup_ops;
indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
ret = iio_buffer_register(indio_dev, indio_dev->channels,
indio_dev->num_channels);
if (ret)
goto error_free_buf;
iio_scan_mask_set(indio_dev, indio_dev->buffer, YAS_SCAN_ACCEL_X);
iio_scan_mask_set(indio_dev, indio_dev->buffer, YAS_SCAN_ACCEL_Y);
iio_scan_mask_set(indio_dev, indio_dev->buffer, YAS_SCAN_ACCEL_Z);
return 0;
error_free_buf:
iio_kfifo_free(indio_dev->buffer);
error_ret:
return ret;
}
int ad799x_register_ring_funcs_and_init(struct iio_dev *indio_dev)
{
int ret = 0;
indio_dev->buffer = iio_kfifo_allocate(indio_dev);
if (!indio_dev->buffer) {
ret = -ENOMEM;
goto error_ret;
}
indio_dev->pollfunc = iio_alloc_pollfunc(NULL,
&ad799x_trigger_handler,
IRQF_ONESHOT,
indio_dev,
"%s_consumer%d",
indio_dev->name,
indio_dev->id);
if (indio_dev->pollfunc == NULL) {
ret = -ENOMEM;
goto error_deallocate_kfifo;
}
/* Ring buffer functions - here trigger setup related */
indio_dev->setup_ops = &ad799x_buf_setup_ops;
indio_dev->buffer->scan_timestamp = true;
/* Flag that polled ring buffering is possible */
indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
return 0;
error_deallocate_kfifo:
iio_kfifo_free(indio_dev->buffer);
error_ret:
return ret;
}
/**
* iio_triggered_buffer_setup() - Setup triggered buffer and pollfunc
* @indio_dev: IIO device structure
* @pollfunc_bh: Function which will be used as pollfunc bottom half
* @pollfunc_th: Function which will be used as pollfunc top half
* @setup_ops: Buffer setup functions to use for this device.
* If NULL the default setup functions for triggered
* buffers will be used.
*
* This function combines some common tasks which will normally be performed
* when setting up a triggered buffer. It will allocate the buffer and the
* pollfunc, as well as register the buffer with the IIO core.
*
* Before calling this function the indio_dev structure should already be
* completely initialized, but not yet registered. In practice this means that
* this function should be called right before iio_device_register().
*
* To free the resources allocated by this function call
* iio_triggered_buffer_cleanup().
*/
int iio_triggered_buffer_setup(struct iio_dev *indio_dev,
irqreturn_t (*pollfunc_bh)(int irq, void *p),
irqreturn_t (*pollfunc_th)(int irq, void *p),
const struct iio_buffer_setup_ops *setup_ops)
{
int ret;
indio_dev->buffer = iio_kfifo_allocate(indio_dev);
if (!indio_dev->buffer) {
ret = -ENOMEM;
goto error_ret;
}
indio_dev->pollfunc = iio_alloc_pollfunc(pollfunc_bh,
pollfunc_th,
IRQF_ONESHOT,
indio_dev,
"%s_consumer%d",
indio_dev->name,
indio_dev->id);
if (indio_dev->pollfunc == NULL) {
ret = -ENOMEM;
goto error_kfifo_free;
}
/* Ring buffer functions - here trigger setup related */
if (setup_ops)
indio_dev->setup_ops = setup_ops;
else
indio_dev->setup_ops = &iio_triggered_buffer_setup_ops;
/* Flag that polled ring buffering is possible */
indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
ret = iio_buffer_register(indio_dev,
indio_dev->channels,
indio_dev->num_channels);
if (ret)
goto error_dealloc_pollfunc;
return 0;
error_dealloc_pollfunc:
iio_dealloc_pollfunc(indio_dev->pollfunc);
error_kfifo_free:
iio_kfifo_free(indio_dev->buffer);
error_ret:
return ret;
}
int inv_ami306_configure_ring(struct iio_dev *indio_dev)
{
int ret = 0;
struct iio_buffer *ring;
ring = iio_kfifo_allocate(indio_dev);
if (!ring) {
ret = -ENOMEM;
return ret;
}
indio_dev->buffer = ring;
/* setup ring buffer */
ring->scan_timestamp = true;
indio_dev->setup_ops = &inv_ami306_ring_setup_ops;
indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
return 0;
}
/**
* devm_iio_fifo_allocate - Resource-managed iio_kfifo_allocate()
* @dev: Device to allocate kfifo buffer for
*
* RETURNS:
* Pointer to allocated iio_buffer on success, NULL on failure.
*/
struct iio_buffer *devm_iio_kfifo_allocate(struct device *dev)
{
struct iio_buffer **ptr, *r;
ptr = devres_alloc(devm_iio_kfifo_release, sizeof(*ptr), GFP_KERNEL);
if (!ptr)
return NULL;
r = iio_kfifo_allocate();
if (r) {
*ptr = r;
devres_add(dev, ptr);
} else {
devres_free(ptr);
}
return r;
}
static int m4pas_create_iiodev(struct iio_dev *iio)
{
int err = 0;
struct m4pas_driver_data *dd = iio_priv(iio);
iio->name = M4PAS_DRIVER_NAME;
iio->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_HARDWARE;
iio->num_channels = 1;
iio->info = &m4pas_iio_info;
iio->channels = m4pas_iio_channels;
iio->buffer = iio_kfifo_allocate(iio);
if (iio->buffer == NULL) {
m4pas_err("%s: Failed to allocate IIO buffer.\n", __func__);
err = -ENOMEM;
goto m4pas_create_iiodev_kfifo_fail;
}
iio->buffer->scan_timestamp = true;
iio->buffer->access->set_bytes_per_datum(iio->buffer,
sizeof(dd->iiodat));
err = iio_buffer_register(iio, iio->channels, iio->num_channels);
if (err < 0) {
m4pas_err("%s: Failed to register IIO buffer.\n", __func__);
goto m4pas_create_iiodev_buffer_fail;
}
err = iio_device_register(iio);
if (err < 0) {
m4pas_err("%s: Failed to register IIO device.\n", __func__);
goto m4pas_create_iiodev_iioreg_fail;
}
goto m4pas_create_iiodev_exit;
m4pas_create_iiodev_iioreg_fail:
iio_buffer_unregister(iio);
m4pas_create_iiodev_buffer_fail:
iio_kfifo_free(iio->buffer);
m4pas_create_iiodev_kfifo_fail:
iio_device_free(iio); /* dd is freed here */
m4pas_create_iiodev_exit:
return err;
}
int ssp_iio_configure_ring(struct iio_dev *indio_dev)
{
struct iio_buffer *ring;
ring = iio_kfifo_allocate(indio_dev);
if (!ring)
return -ENOMEM;
ring->bytes_per_datum = 8;
indio_dev->buffer = ring;
/* setup ring buffer */
ring->scan_timestamp = true;
indio_dev->setup_ops = &ssp_iio_ring_setup_ops;
/*scan count double count timestamp. should subtract 1. but
number of channels still includes timestamp*/
indio_dev->modes |= INDIO_BUFFER_HARDWARE;
return 0;
}
/**
* iio_triggered_buffer_setup() - Setup triggered buffer and pollfunc
* @indio_dev: IIO device structure
* @pollfunc_bh: Function which will be used as pollfunc bottom half
* @pollfunc_th: Function which will be used as pollfunc top half
* @setup_ops: Buffer setup functions to use for this device.
* If NULL the default setup functions for triggered
* buffers will be used.
*
* This function combines some common tasks which will normally be performed
* when setting up a triggered buffer. It will allocate the buffer and the
* pollfunc.
*
* Before calling this function the indio_dev structure should already be
* completely initialized, but not yet registered. In practice this means that
* this function should be called right before iio_device_register().
*
* To free the resources allocated by this function call
* iio_triggered_buffer_cleanup().
*/
int iio_triggered_buffer_setup(struct iio_dev *indio_dev,
irqreturn_t (*pollfunc_bh)(int irq, void *p),
irqreturn_t (*pollfunc_th)(int irq, void *p),
const struct iio_buffer_setup_ops *setup_ops)
{
struct iio_buffer *buffer;
int ret;
buffer = iio_kfifo_allocate();
if (!buffer) {
ret = -ENOMEM;
goto error_ret;
}
iio_device_attach_buffer(indio_dev, buffer);
indio_dev->pollfunc = iio_alloc_pollfunc(pollfunc_bh,
pollfunc_th,
IRQF_ONESHOT,
indio_dev,
"%s_consumer%d",
indio_dev->name,
indio_dev->id);
if (indio_dev->pollfunc == NULL) {
ret = -ENOMEM;
goto error_kfifo_free;
}
/* Ring buffer functions - here trigger setup related */
indio_dev->setup_ops = setup_ops;
/* Flag that polled ring buffering is possible */
indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
return 0;
error_kfifo_free:
iio_kfifo_free(indio_dev->buffer);
error_ret:
return ret;
}
int iio_simple_dummy_configure_buffer(struct iio_dev *indio_dev)
{
int ret;
struct iio_buffer *buffer;
buffer = iio_kfifo_allocate(indio_dev);
if (buffer == NULL) {
ret = -ENOMEM;
goto error_ret;
}
indio_dev->buffer = buffer;
buffer->scan_timestamp = true;
indio_dev->setup_ops = &iio_simple_dummy_buffer_setup_ops;
indio_dev->pollfunc = iio_alloc_pollfunc(NULL,
&iio_simple_dummy_trigger_h,
IRQF_ONESHOT,
indio_dev,
"iio_simple_dummy_consumer%d",
indio_dev->id);
if (indio_dev->pollfunc == NULL) {
ret = -ENOMEM;
goto error_free_buffer;
}
indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
return 0;
error_free_buffer:
iio_kfifo_free(indio_dev->buffer);
error_ret:
return ret;
}
int ad7606_register_ring_funcs_and_init(struct iio_dev *indio_dev)
{
struct ad7606_state *st = iio_priv(indio_dev);
int ret;
indio_dev->buffer = iio_kfifo_allocate(indio_dev);
if (!indio_dev->buffer) {
ret = -ENOMEM;
goto error_ret;
}
indio_dev->pollfunc = iio_alloc_pollfunc(&ad7606_trigger_handler_th_bh,
&ad7606_trigger_handler_th_bh,
0,
indio_dev,
"%s_consumer%d",
indio_dev->name,
indio_dev->id);
if (indio_dev->pollfunc == NULL) {
ret = -ENOMEM;
goto error_deallocate_kfifo;
}
/* Ring buffer functions - here trigger setup related */
indio_dev->setup_ops = &ad7606_ring_setup_ops;
indio_dev->buffer->scan_timestamp = true;
INIT_WORK(&st->poll_work, &ad7606_poll_bh_to_ring);
/* Flag that polled ring buffering is possible */
indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
return 0;
error_deallocate_kfifo:
iio_kfifo_free(indio_dev->buffer);
error_ret:
return ret;
}
int ade7758_configure_ring(struct iio_dev *indio_dev)
{
struct ade7758_state *st = iio_priv(indio_dev);
int ret = 0;
indio_dev->buffer = iio_kfifo_allocate(indio_dev);
if (!indio_dev->buffer) {
ret = -ENOMEM;
return ret;
}
indio_dev->setup_ops = &ade7758_ring_setup_ops;
indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
&ade7758_trigger_handler,
0,
indio_dev,
"ade7759_consumer%d",
indio_dev->id);
if (indio_dev->pollfunc == NULL) {
ret = -ENOMEM;
goto error_iio_kfifo_free;
}
indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
st->tx_buf[0] = ADE7758_READ_REG(ADE7758_RSTATUS);
st->tx_buf[1] = 0;
st->tx_buf[2] = 0;
st->tx_buf[3] = 0;
st->tx_buf[4] = ADE7758_READ_REG(ADE7758_WFORM);
st->tx_buf[5] = 0;
st->tx_buf[6] = 0;
st->tx_buf[7] = 0;
/* build spi ring message */
st->ring_xfer[0].tx_buf = &st->tx_buf[0];
st->ring_xfer[0].len = 1;
st->ring_xfer[0].bits_per_word = 8;
st->ring_xfer[0].delay_usecs = 4;
st->ring_xfer[1].rx_buf = &st->rx_buf[1];
st->ring_xfer[1].len = 3;
st->ring_xfer[1].bits_per_word = 8;
st->ring_xfer[1].cs_change = 1;
st->ring_xfer[2].tx_buf = &st->tx_buf[4];
st->ring_xfer[2].len = 1;
st->ring_xfer[2].bits_per_word = 8;
st->ring_xfer[2].delay_usecs = 1;
st->ring_xfer[3].rx_buf = &st->rx_buf[5];
st->ring_xfer[3].len = 3;
st->ring_xfer[3].bits_per_word = 8;
spi_message_init(&st->ring_msg);
spi_message_add_tail(&st->ring_xfer[0], &st->ring_msg);
spi_message_add_tail(&st->ring_xfer[1], &st->ring_msg);
spi_message_add_tail(&st->ring_xfer[2], &st->ring_msg);
spi_message_add_tail(&st->ring_xfer[3], &st->ring_msg);
return 0;
error_iio_kfifo_free:
iio_kfifo_free(indio_dev->buffer);
return ret;
}
int iio_simple_dummy_configure_buffer(struct iio_dev *indio_dev)
{
int ret;
struct iio_buffer *buffer;
/* Allocate a buffer to use - here a kfifo */
buffer = iio_kfifo_allocate(indio_dev);
if (buffer == NULL) {
ret = -ENOMEM;
goto error_ret;
}
indio_dev->buffer = buffer;
/* Enable timestamps by default */
buffer->scan_timestamp = true;
/*
* Tell the core what device type specific functions should
* be run on either side of buffer capture enable / disable.
*/
indio_dev->setup_ops = &iio_simple_dummy_buffer_setup_ops;
/*
* Configure a polling function.
* When a trigger event with this polling function connected
* occurs, this function is run. Typically this grabs data
* from the device.
*
* NULL for the top half. This is normally implemented only if we
* either want to ping a capture now pin (no sleeping) or grab
* a timestamp as close as possible to a data ready trigger firing.
*
* IRQF_ONESHOT ensures irqs are masked such that only one instance
* of the handler can run at a time.
*
* "iio_simple_dummy_consumer%d" formatting string for the irq 'name'
* as seen under /proc/interrupts. Remaining parameters as per printk.
*/
indio_dev->pollfunc = iio_alloc_pollfunc(NULL,
&iio_simple_dummy_trigger_h,
IRQF_ONESHOT,
indio_dev,
"iio_simple_dummy_consumer%d",
indio_dev->id);
if (indio_dev->pollfunc == NULL) {
ret = -ENOMEM;
goto error_free_buffer;
}
/*
* Notify the core that this device is capable of buffered capture
* driven by a trigger.
*/
indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
return 0;
error_free_buffer:
iio_kfifo_free(indio_dev->buffer);
error_ret:
return ret;
}
