Re: [PATCH v6 03/24] iio: make use of devm_iio_kfifo_buffer_setup() helper

From: Jonathan Cameron
Date: Mon Feb 15 2021 - 07:12:33 EST

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In reply to: Alexandru Ardelean: "[PATCH v6 03/24] iio: make use of devm_iio_kfifo_buffer_setup() helper"
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On Mon, 15 Feb 2021 12:40:22 +0200
Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx> wrote:

> All drivers that already call devm_iio_kfifo_allocate() &
> iio_device_attach_buffer() are simple to convert to
> iio_device_attach_kfifo_buffer() in a single go.
>
> This change does that; the unwind order is preserved.
> What is important, is that the devm_iio_kfifo_buffer_setup() be called
> after the indio_dev->modes is assigned, to make sure that
> INDIO_BUFFER_SOFTWARE flag is set and not overridden by the assignment to
> indio_dev->modes.
>
> Also, the INDIO_BUFFER_SOFTWARE has been removed from the assignments of
> 'indio_dev->modes' because it is set by devm_iio_kfifo_buffer_setup().
>
> Signed-off-by: Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx>
I 'think' this one is is in the obviously correct category so I've
applied it to the togreg branch of iio.git and pushed out as testing.
Note there is still plenty of time for any additional feedback,
particularly as the CC list was a little sparse.

I've +CCd those who I know are still active maintainers of some
of the affected drivers.

Jonathan

> ---
> drivers/iio/accel/ssp_accel_sensor.c | 14 ++++-------
> drivers/iio/adc/ina2xx-adc.c | 14 +++++------
> drivers/iio/adc/ti_am335x_adc.c | 18 ++++-----------
> .../cros_ec_sensors/cros_ec_sensors_core.c | 13 ++++-------
> drivers/iio/gyro/ssp_gyro_sensor.c | 14 ++++-------
> drivers/iio/health/max30100.c | 16 ++++++-------
> drivers/iio/health/max30102.c | 16 ++++++-------
> .../iio/imu/inv_icm42600/inv_icm42600_accel.c | 14 +++++------
> .../iio/imu/inv_icm42600/inv_icm42600_gyro.c | 13 +++++------
> .../iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c | 15 +++++-------
> drivers/iio/light/acpi-als.c | 12 ++++------
> drivers/iio/light/apds9960.c | 16 ++++++-------
> .../staging/iio/impedance-analyzer/ad5933.c | 23 ++++---------------
> 13 files changed, 74 insertions(+), 124 deletions(-)
>
> diff --git a/drivers/iio/accel/ssp_accel_sensor.c b/drivers/iio/accel/ssp_accel_sensor.c
> index 474477e91b5e..04dcb2b657ee 100644
> --- a/drivers/iio/accel/ssp_accel_sensor.c
> +++ b/drivers/iio/accel/ssp_accel_sensor.c
> @@ -96,7 +96,6 @@ static int ssp_accel_probe(struct platform_device *pdev)
> int ret;
> struct iio_dev *indio_dev;
> struct ssp_sensor_data *spd;
> - struct iio_buffer *buffer;
>
> indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*spd));
> if (!indio_dev)
> @@ -109,18 +108,15 @@ static int ssp_accel_probe(struct platform_device *pdev)
>
> indio_dev->name = ssp_accel_device_name;
> indio_dev->info = &ssp_accel_iio_info;
> - indio_dev->modes = INDIO_BUFFER_SOFTWARE;
> indio_dev->channels = ssp_acc_channels;
> indio_dev->num_channels = ARRAY_SIZE(ssp_acc_channels);
> indio_dev->available_scan_masks = ssp_accel_scan_mask;
>
> - buffer = devm_iio_kfifo_allocate(&pdev->dev);
> - if (!buffer)
> - return -ENOMEM;
> -
> - iio_device_attach_buffer(indio_dev, buffer);
> -
> - indio_dev->setup_ops = &ssp_accel_buffer_ops;
> + ret = devm_iio_kfifo_buffer_setup(&pdev->dev, indio_dev,
> + INDIO_BUFFER_SOFTWARE,
> + &ssp_accel_buffer_ops);
> + if (ret)
> + return ret;
>
> platform_set_drvdata(pdev, indio_dev);
>
> diff --git a/drivers/iio/adc/ina2xx-adc.c b/drivers/iio/adc/ina2xx-adc.c
> index b573ec60a8b8..2ae54258b221 100644
> --- a/drivers/iio/adc/ina2xx-adc.c
> +++ b/drivers/iio/adc/ina2xx-adc.c
> @@ -953,7 +953,6 @@ static int ina2xx_probe(struct i2c_client *client,
> {
> struct ina2xx_chip_info *chip;
> struct iio_dev *indio_dev;
> - struct iio_buffer *buffer;
> unsigned int val;
> enum ina2xx_ids type;
> int ret;
> @@ -1017,7 +1016,7 @@ static int ina2xx_probe(struct i2c_client *client,
> return ret;
> }
>
> - indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_SOFTWARE;
> + indio_dev->modes = INDIO_DIRECT_MODE;
> if (id->driver_data == ina226) {
> indio_dev->channels = ina226_channels;
> indio_dev->num_channels = ARRAY_SIZE(ina226_channels);
> @@ -1028,13 +1027,12 @@ static int ina2xx_probe(struct i2c_client *client,
> indio_dev->info = &ina219_info;
> }
> indio_dev->name = id->name;
> - indio_dev->setup_ops = &ina2xx_setup_ops;
>
> - buffer = devm_iio_kfifo_allocate(&indio_dev->dev);
> - if (!buffer)
> - return -ENOMEM;
> -
> - iio_device_attach_buffer(indio_dev, buffer);
> + ret = devm_iio_kfifo_buffer_setup(&client->dev, indio_dev,
> + INDIO_BUFFER_SOFTWARE,
> + &ina2xx_setup_ops);
> + if (ret)
> + return ret;
>
> return iio_device_register(indio_dev);
> }
> diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
> index e946903b0993..855cc2d64ac8 100644
> --- a/drivers/iio/adc/ti_am335x_adc.c
> +++ b/drivers/iio/adc/ti_am335x_adc.c
> @@ -385,24 +385,16 @@ static int tiadc_iio_buffered_hardware_setup(struct device *dev,
> unsigned long flags,
> const struct iio_buffer_setup_ops *setup_ops)
> {
> - struct iio_buffer *buffer;
> int ret;
>
> - buffer = devm_iio_kfifo_allocate(dev);
> - if (!buffer)
> - return -ENOMEM;
> -
> - iio_device_attach_buffer(indio_dev, buffer);
> -
> - ret = devm_request_threaded_irq(dev, irq, pollfunc_th, pollfunc_bh,
> - flags, indio_dev->name, indio_dev);
> + ret = devm_iio_kfifo_buffer_setup(dev, indio_dev,
> + INDIO_BUFFER_SOFTWARE,
> + setup_ops);
> if (ret)
> return ret;
>
> - indio_dev->setup_ops = setup_ops;
> - indio_dev->modes |= INDIO_BUFFER_SOFTWARE;
> -
> - return 0;
> + return devm_request_threaded_irq(dev, irq, pollfunc_th, pollfunc_bh,
> + flags, indio_dev->name, indio_dev);
> }
>
> static const char * const chan_name_ain[] = {
> diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> index c833ec0ef214..f8824afe595e 100644
> --- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> +++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> @@ -334,14 +334,11 @@ int cros_ec_sensors_core_init(struct platform_device *pdev,
> * We can not use trigger here, as events are generated
> * as soon as sample_frequency is set.
> */
> - struct iio_buffer *buffer;
> -
> - buffer = devm_iio_kfifo_allocate(dev);
> - if (!buffer)
> - return -ENOMEM;
> -
> - iio_device_attach_buffer(indio_dev, buffer);
> - indio_dev->modes = INDIO_BUFFER_SOFTWARE;
> + ret = devm_iio_kfifo_buffer_setup(dev, indio_dev,
> + INDIO_BUFFER_SOFTWARE,
> + NULL);
> + if (ret)
> + return ret;
>
> ret = cros_ec_sensorhub_register_push_data(
> sensor_hub, sensor_platform->sensor_num,
> diff --git a/drivers/iio/gyro/ssp_gyro_sensor.c b/drivers/iio/gyro/ssp_gyro_sensor.c
> index ac7c170a20de..46ed12771d2f 100644
> --- a/drivers/iio/gyro/ssp_gyro_sensor.c
> +++ b/drivers/iio/gyro/ssp_gyro_sensor.c
> @@ -96,7 +96,6 @@ static int ssp_gyro_probe(struct platform_device *pdev)
> int ret;
> struct iio_dev *indio_dev;
> struct ssp_sensor_data *spd;
> - struct iio_buffer *buffer;
>
> indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*spd));
> if (!indio_dev)
> @@ -109,18 +108,15 @@ static int ssp_gyro_probe(struct platform_device *pdev)
>
> indio_dev->name = ssp_gyro_name;
> indio_dev->info = &ssp_gyro_iio_info;
> - indio_dev->modes = INDIO_BUFFER_SOFTWARE;
> indio_dev->channels = ssp_gyro_channels;
> indio_dev->num_channels = ARRAY_SIZE(ssp_gyro_channels);
> indio_dev->available_scan_masks = ssp_gyro_scan_mask;
>
> - buffer = devm_iio_kfifo_allocate(&pdev->dev);
> - if (!buffer)
> - return -ENOMEM;
> -
> - iio_device_attach_buffer(indio_dev, buffer);
> -
> - indio_dev->setup_ops = &ssp_gyro_buffer_ops;
> + ret = devm_iio_kfifo_buffer_setup(&pdev->dev, indio_dev,
> + INDIO_BUFFER_SOFTWARE,
> + &ssp_gyro_buffer_ops);
> + if (ret)
> + return ret;
>
> platform_set_drvdata(pdev, indio_dev);
>
> diff --git a/drivers/iio/health/max30100.c b/drivers/iio/health/max30100.c
> index 38aa2030f3c6..36ba7611d9ce 100644
> --- a/drivers/iio/health/max30100.c
> +++ b/drivers/iio/health/max30100.c
> @@ -418,7 +418,6 @@ static int max30100_probe(struct i2c_client *client,
> const struct i2c_device_id *id)
> {
> struct max30100_data *data;
> - struct iio_buffer *buffer;
> struct iio_dev *indio_dev;
> int ret;
>
> @@ -426,19 +425,18 @@ static int max30100_probe(struct i2c_client *client,
> if (!indio_dev)
> return -ENOMEM;
>
> - buffer = devm_iio_kfifo_allocate(&client->dev);
> - if (!buffer)
> - return -ENOMEM;
> -
> - iio_device_attach_buffer(indio_dev, buffer);
> -
> indio_dev->name = MAX30100_DRV_NAME;
> indio_dev->channels = max30100_channels;
> indio_dev->info = &max30100_info;
> indio_dev->num_channels = ARRAY_SIZE(max30100_channels);
> indio_dev->available_scan_masks = max30100_scan_masks;
> - indio_dev->modes = (INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE);
> - indio_dev->setup_ops = &max30100_buffer_setup_ops;
> + indio_dev->modes = INDIO_DIRECT_MODE;
> +
> + ret = devm_iio_kfifo_buffer_setup(&client->dev, indio_dev,
> + INDIO_BUFFER_SOFTWARE,
> + &max30100_buffer_setup_ops);
> + if (ret)
> + return ret;
>
> data = iio_priv(indio_dev);
> data->indio_dev = indio_dev;
> diff --git a/drivers/iio/health/max30102.c b/drivers/iio/health/max30102.c
> index b35557a54ee2..2292876c55e2 100644
> --- a/drivers/iio/health/max30102.c
> +++ b/drivers/iio/health/max30102.c
> @@ -506,7 +506,6 @@ static int max30102_probe(struct i2c_client *client,
> const struct i2c_device_id *id)
> {
> struct max30102_data *data;
> - struct iio_buffer *buffer;
> struct iio_dev *indio_dev;
> int ret;
> unsigned int reg;
> @@ -515,16 +514,9 @@ static int max30102_probe(struct i2c_client *client,
> if (!indio_dev)
> return -ENOMEM;
>
> - buffer = devm_iio_kfifo_allocate(&client->dev);
> - if (!buffer)
> - return -ENOMEM;
> -
> - iio_device_attach_buffer(indio_dev, buffer);
> -
> indio_dev->name = MAX30102_DRV_NAME;
> indio_dev->info = &max30102_info;
> - indio_dev->modes = (INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE);
> - indio_dev->setup_ops = &max30102_buffer_setup_ops;
> + indio_dev->modes = INDIO_DIRECT_MODE;
>
> data = iio_priv(indio_dev);
> data->indio_dev = indio_dev;
> @@ -549,6 +541,12 @@ static int max30102_probe(struct i2c_client *client,
> return -ENODEV;
> }
>
> + ret = devm_iio_kfifo_buffer_setup(&client->dev, indio_dev,
> + INDIO_BUFFER_SOFTWARE,
> + &max30102_buffer_setup_ops);
> + if (ret)
> + return ret;
> +
> data->regmap = devm_regmap_init_i2c(client, &max30102_regmap_config);
> if (IS_ERR(data->regmap)) {
> dev_err(&client->dev, "regmap initialization failed\n");
> diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c
> index 3441b0d61c5d..383cc3250342 100644
> --- a/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c
> +++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c
> @@ -709,7 +709,6 @@ struct iio_dev *inv_icm42600_accel_init(struct inv_icm42600_state *st)
> const char *name;
> struct inv_icm42600_timestamp *ts;
> struct iio_dev *indio_dev;
> - struct iio_buffer *buffer;
> int ret;
>
> name = devm_kasprintf(dev, GFP_KERNEL, "%s-accel", st->name);
> @@ -720,23 +719,22 @@ struct iio_dev *inv_icm42600_accel_init(struct inv_icm42600_state *st)
> if (!indio_dev)
> return ERR_PTR(-ENOMEM);
>
> - buffer = devm_iio_kfifo_allocate(dev);
> - if (!buffer)
> - return ERR_PTR(-ENOMEM);
> -
> ts = iio_priv(indio_dev);
> inv_icm42600_timestamp_init(ts, inv_icm42600_odr_to_period(st->conf.accel.odr));
>
> iio_device_set_drvdata(indio_dev, st);
> indio_dev->name = name;
> indio_dev->info = &inv_icm42600_accel_info;
> - indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_SOFTWARE;
> + indio_dev->modes = INDIO_DIRECT_MODE;
> indio_dev->channels = inv_icm42600_accel_channels;
> indio_dev->num_channels = ARRAY_SIZE(inv_icm42600_accel_channels);
> indio_dev->available_scan_masks = inv_icm42600_accel_scan_masks;
> - indio_dev->setup_ops = &inv_icm42600_buffer_ops;
>
> - iio_device_attach_buffer(indio_dev, buffer);
> + ret = devm_iio_kfifo_buffer_setup(dev, indio_dev,
> + INDIO_BUFFER_SOFTWARE,
> + &inv_icm42600_buffer_ops);
> + if (ret)
> + return ERR_PTR(ret);
>
> ret = devm_iio_device_register(dev, indio_dev);
> if (ret)
> diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_gyro.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_gyro.c
> index aee7b9ff4bf4..cec1dd0e0464 100644
> --- a/drivers/iio/imu/inv_icm42600/inv_icm42600_gyro.c
> +++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_gyro.c
> @@ -720,7 +720,6 @@ struct iio_dev *inv_icm42600_gyro_init(struct inv_icm42600_state *st)
> const char *name;
> struct inv_icm42600_timestamp *ts;
> struct iio_dev *indio_dev;
> - struct iio_buffer *buffer;
> int ret;
>
> name = devm_kasprintf(dev, GFP_KERNEL, "%s-gyro", st->name);
> @@ -731,23 +730,23 @@ struct iio_dev *inv_icm42600_gyro_init(struct inv_icm42600_state *st)
> if (!indio_dev)
> return ERR_PTR(-ENOMEM);
>
> - buffer = devm_iio_kfifo_allocate(dev);
> - if (!buffer)
> - return ERR_PTR(-ENOMEM);
> -
> ts = iio_priv(indio_dev);
> inv_icm42600_timestamp_init(ts, inv_icm42600_odr_to_period(st->conf.gyro.odr));
>
> iio_device_set_drvdata(indio_dev, st);
> indio_dev->name = name;
> indio_dev->info = &inv_icm42600_gyro_info;
> - indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_SOFTWARE;
> + indio_dev->modes = INDIO_DIRECT_MODE;
> indio_dev->channels = inv_icm42600_gyro_channels;
> indio_dev->num_channels = ARRAY_SIZE(inv_icm42600_gyro_channels);
> indio_dev->available_scan_masks = inv_icm42600_gyro_scan_masks;
> indio_dev->setup_ops = &inv_icm42600_buffer_ops;
>
> - iio_device_attach_buffer(indio_dev, buffer);
> + ret = devm_iio_kfifo_buffer_setup(dev, indio_dev,
> + INDIO_BUFFER_SOFTWARE,
> + &inv_icm42600_buffer_ops);
> + if (ret)
> + return ERR_PTR(ret);
>
> ret = devm_iio_device_register(dev, indio_dev);
> if (ret)
> diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
> index f1103ecedd64..16730a780964 100644
> --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
> +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
> @@ -739,20 +739,17 @@ static const struct iio_buffer_setup_ops st_lsm6dsx_buffer_ops = {
>
> int st_lsm6dsx_fifo_setup(struct st_lsm6dsx_hw *hw)
> {
> - struct iio_buffer *buffer;
> - int i;
> + int i, ret;
>
> for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
> if (!hw->iio_devs[i])
> continue;
>
> - buffer = devm_iio_kfifo_allocate(hw->dev);
> - if (!buffer)
> - return -ENOMEM;
> -
> - iio_device_attach_buffer(hw->iio_devs[i], buffer);
> - hw->iio_devs[i]->modes |= INDIO_BUFFER_SOFTWARE;
> - hw->iio_devs[i]->setup_ops = &st_lsm6dsx_buffer_ops;
> + ret = devm_iio_kfifo_buffer_setup(hw->dev, hw->iio_devs[i],
> + INDIO_BUFFER_SOFTWARE,
> + &st_lsm6dsx_buffer_ops);
> + if (ret)
> + return ret;
> }
>
> return 0;
> diff --git a/drivers/iio/light/acpi-als.c b/drivers/iio/light/acpi-als.c
> index 2be7180e2cbf..f8e547fd35e7 100644
> --- a/drivers/iio/light/acpi-als.c
> +++ b/drivers/iio/light/acpi-als.c
> @@ -165,7 +165,7 @@ static int acpi_als_add(struct acpi_device *device)
> {
> struct acpi_als *als;
> struct iio_dev *indio_dev;
> - struct iio_buffer *buffer;
> + int ret;
>
> indio_dev = devm_iio_device_alloc(&device->dev, sizeof(*als));
> if (!indio_dev)
> @@ -179,15 +179,13 @@ static int acpi_als_add(struct acpi_device *device)
>
> indio_dev->name = ACPI_ALS_DEVICE_NAME;
> indio_dev->info = &acpi_als_info;
> - indio_dev->modes = INDIO_BUFFER_SOFTWARE;
> indio_dev->channels = acpi_als_channels;
> indio_dev->num_channels = ARRAY_SIZE(acpi_als_channels);
>
> - buffer = devm_iio_kfifo_allocate(&device->dev);
> - if (!buffer)
> - return -ENOMEM;
> -
> - iio_device_attach_buffer(indio_dev, buffer);
> + ret = devm_iio_kfifo_buffer_setup(&device->dev, indio_dev,
> + INDIO_BUFFER_SOFTWARE, NULL);
> + if (ret)
> + return ret;
>
> return devm_iio_device_register(&device->dev, indio_dev);
> }
> diff --git a/drivers/iio/light/apds9960.c b/drivers/iio/light/apds9960.c
> index df0647856e5d..4141c0fa7bc4 100644
> --- a/drivers/iio/light/apds9960.c
> +++ b/drivers/iio/light/apds9960.c
> @@ -988,7 +988,6 @@ static int apds9960_probe(struct i2c_client *client,
> const struct i2c_device_id *id)
> {
> struct apds9960_data *data;
> - struct iio_buffer *buffer;
> struct iio_dev *indio_dev;
> int ret;
>
> @@ -996,19 +995,18 @@ static int apds9960_probe(struct i2c_client *client,
> if (!indio_dev)
> return -ENOMEM;
>
> - buffer = devm_iio_kfifo_allocate(&client->dev);
> - if (!buffer)
> - return -ENOMEM;
> -
> - iio_device_attach_buffer(indio_dev, buffer);
> -
> indio_dev->info = &apds9960_info;
> indio_dev->name = APDS9960_DRV_NAME;
> indio_dev->channels = apds9960_channels;
> indio_dev->num_channels = ARRAY_SIZE(apds9960_channels);
> indio_dev->available_scan_masks = apds9960_scan_masks;
> - indio_dev->modes = (INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE);
> - indio_dev->setup_ops = &apds9960_buffer_setup_ops;
> + indio_dev->modes = INDIO_DIRECT_MODE;
> +
> + ret = devm_iio_kfifo_buffer_setup(&client->dev, indio_dev,
> + INDIO_BUFFER_SOFTWARE,
> + &apds9960_buffer_setup_ops);
> + if (ret)
> + return ret;
>
> data = iio_priv(indio_dev);
> i2c_set_clientdata(client, indio_dev);
> diff --git a/drivers/staging/iio/impedance-analyzer/ad5933.c b/drivers/staging/iio/impedance-analyzer/ad5933.c
> index dba78896ea8f..793918e1c45f 100644
> --- a/drivers/staging/iio/impedance-analyzer/ad5933.c
> +++ b/drivers/staging/iio/impedance-analyzer/ad5933.c
> @@ -602,23 +602,6 @@ static const struct iio_buffer_setup_ops ad5933_ring_setup_ops = {
> .postdisable = ad5933_ring_postdisable,
> };
>
> -static int ad5933_register_ring_funcs_and_init(struct device *dev,
> - struct iio_dev *indio_dev)
> -{
> - struct iio_buffer *buffer;
> -
> - buffer = devm_iio_kfifo_allocate(dev);
> - if (!buffer)
> - return -ENOMEM;
> -
> - iio_device_attach_buffer(indio_dev, buffer);
> -
> - /* Ring buffer functions - here trigger setup related */
> - indio_dev->setup_ops = &ad5933_ring_setup_ops;
> -
> - return 0;
> -}
> -
> static void ad5933_work(struct work_struct *work)
> {
> struct ad5933_state *st = container_of(work,
> @@ -761,11 +744,13 @@ static int ad5933_probe(struct i2c_client *client,
>
> indio_dev->info = &ad5933_info;
> indio_dev->name = id->name;
> - indio_dev->modes = (INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE);
> + indio_dev->modes = INDIO_DIRECT_MODE;
> indio_dev->channels = ad5933_channels;
> indio_dev->num_channels = ARRAY_SIZE(ad5933_channels);
>
> - ret = ad5933_register_ring_funcs_and_init(&client->dev, indio_dev);
> + ret = devm_iio_kfifo_buffer_setup(&client->dev, indio_dev,
> + INDIO_BUFFER_SOFTWARE,
> + &ad5933_ring_setup_ops);
> if (ret)
> return ret;
>

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