Re: [PATCH 2/6] iio: backend: Add support for CRC

[Jonathan Cameron]

On Thu, 9 Jul 2026 10:50:13 +0200
Janani Sunil <janani.sunil@xxxxxxxxxx> wrote:

> Add a backend operation to enable or disable Cyclic Redundancy Check
> processing for data integrity verification. When enabled, the backend
> will generate, verify, or process CRC information for data samples
> transmitted over the interface, allowing the host to detect corrupted
> samples.
> 
> Signed-off-by: Janani Sunil <janani.sunil@xxxxxxxxxx>
> ---
>  drivers/iio/industrialio-backend.c | 33 +++++++++++++++++++++++++++++++++
>  include/linux/iio/backend.h        |  4 ++++
>  2 files changed, 37 insertions(+)
> 
> diff --git a/drivers/iio/industrialio-backend.c b/drivers/iio/industrialio-backend.c
> index f7a4be8ec320..379a426931cd 100644
> --- a/drivers/iio/industrialio-backend.c
> +++ b/drivers/iio/industrialio-backend.c
> @@ -886,6 +886,39 @@ int iio_backend_num_lanes_set(struct iio_backend *back, unsigned int num_lanes)
>  }
>  EXPORT_SYMBOL_NS_GPL(iio_backend_num_lanes_set, "IIO_BACKEND");
>  
> +/**
> + * iio_backend_crc_enable - Enable the CRC generation.
> + * @back: Backend device
> + *
> + * Enable Cyclic Redundancy Check processing for data integrity
> + * verification. When enabled, the backend will generate, verify, or process

Verification should be on previous line - under 80 chars.

> + * CRC information for data samples transmitted over the interface.
> + *
> + * RETURNS:
> + * 0 on success, negative error number on failure.
> + */
> +int iio_backend_crc_enable(struct iio_backend *back)
> +{
> +	return iio_backend_op_call(back, crc_enable);
> +}
> +EXPORT_SYMBOL_NS_GPL(iio_backend_crc_enable, "IIO_BACKEND");
> +
> +/**
> + * iio_backend_crc_disable - Disable the CRC generation.
> + * @back: Backend device
> + *
> + * Disable Cyclic Redundancy Check processing. When disabled, the backend
> + * will stop generating, verifying, or processing CRC information for data samples.

Odd line wrap.  Keep to a consistent <= 80 chars unless there is a reason
to do otherwise.

> + *
> + * RETURNS:
> + * 0 on success, negative error number on failure.
> + */