static void m4pas_remove_iiodev(struct iio_dev *iio)
{
struct m4pas_driver_data *dd = iio_priv(iio);
/* Remember, only call when dd->mutex is locked */
iio_kfifo_free(iio->buffer);
iio_buffer_unregister(iio);
iio_device_unregister(iio);
mutex_destroy(&(dd->mutex));
iio_device_free(iio); /* dd is freed here */
return;
}
/**
* inv_ak89xx_remove() - remove function.
*/
static int inv_ak89xx_remove(struct i2c_client *client)
{
struct iio_dev *indio_dev = i2c_get_clientdata(client);
struct inv_ak89xx_state_s *st = iio_priv(indio_dev);
cancel_delayed_work_sync(&st->work);
iio_device_unregister(indio_dev);
inv_ak89xx_remove_trigger(indio_dev);
iio_buffer_unregister(indio_dev);
inv_ak89xx_unconfigure_ring(indio_dev);
iio_free_device(indio_dev);
dev_info(&client->adapter->dev, "inv-ak89xx-iio module removed.\n");
return 0;
}
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;
}
/**
* iio_triggered_buffer_cleanup() - Free resources allocated by iio_triggered_buffer_setup()
* @indio_dev: IIO device structure
*/
void iio_triggered_buffer_cleanup(struct iio_dev *indio_dev)
{
iio_buffer_unregister(indio_dev);
iio_dealloc_pollfunc(indio_dev->pollfunc);
iio_kfifo_free(indio_dev->buffer);
}
void ade7758_uninitialize_ring(struct iio_dev *indio_dev)
{
iio_buffer_unregister(indio_dev);
}
static void yas_remove_buffer(struct iio_dev *indio_dev)
{
iio_buffer_unregister(indio_dev);
iio_sw_rb_free(indio_dev->buffer);
};
/**
* inv_ak89xx_probe() - probe function.
*/
static int inv_ak89xx_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct inv_ak89xx_state_s *st;
struct iio_dev *indio_dev;
int result;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
result = -ENODEV;
goto out_no_free;
}
indio_dev = iio_allocate_device(sizeof(*st));
if (indio_dev == NULL) {
result = -ENOMEM;
goto out_no_free;
}
st = iio_priv(indio_dev);
st->i2c = client;
st->sl_handle = client->adapter;
st->plat_data =
*(struct mpu_platform_data *)dev_get_platdata(&client->dev);
st->i2c_addr = client->addr;
st->delay = AK89XX_DEFAULT_DELAY;
st->compass_id = id->driver_data;
st->compass_scale = 0;
i2c_set_clientdata(client, indio_dev);
result = ak89xx_init(st);
if (result)
goto out_free;
indio_dev->dev.parent = &client->dev;
indio_dev->name = id->name;
indio_dev->channels = compass_channels;
indio_dev->num_channels = ARRAY_SIZE(compass_channels);
indio_dev->info = &ak89xx_info;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->currentmode = INDIO_DIRECT_MODE;
result = inv_ak89xx_configure_ring(indio_dev);
if (result)
goto out_free;
result = iio_buffer_register(indio_dev, indio_dev->channels,
indio_dev->num_channels);
if (result)
goto out_unreg_ring;
result = inv_ak89xx_probe_trigger(indio_dev);
if (result)
goto out_remove_ring;
result = iio_device_register(indio_dev);
if (result)
goto out_remove_trigger;
INIT_DELAYED_WORK(&st->work, ak89xx_work_func);
pr_info("%s: Probe name %s\n", __func__, id->name);
return 0;
out_remove_trigger:
if (indio_dev->modes & INDIO_BUFFER_TRIGGERED)
inv_ak89xx_remove_trigger(indio_dev);
out_remove_ring:
iio_buffer_unregister(indio_dev);
out_unreg_ring:
inv_ak89xx_unconfigure_ring(indio_dev);
out_free:
iio_free_device(indio_dev);
out_no_free:
dev_err(&client->adapter->dev, "%s failed %d\n", __func__, result);
return -EIO;
}
/**
* iio_simple_dummy_unconfigure_buffer() - release buffer resources
* @indo_dev: device instance state
*/
void iio_simple_dummy_unconfigure_buffer(struct iio_dev *indio_dev)
{
iio_buffer_unregister(indio_dev);
iio_dealloc_pollfunc(indio_dev->pollfunc);
iio_kfifo_free(indio_dev->buffer);
}
