On Fri, 2025-04-25 at 14:25 +0300, Antoniu Miclaus wrote:
> Add iio backend support for number of lanes to be enabled.
>
> Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
> ---
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
> no changes in v3.
> drivers/iio/industrialio-backend.c | 17 +++++++++++++++++
> include/linux/iio/backend.h | 3 +++
> 2 files changed, 20 insertions(+)
>
> diff --git a/drivers/iio/industrialio-backend.c b/drivers/iio/industrialio-
> backend.c
> index f7c8167a248d..1063935cd808 100644
> --- a/drivers/iio/industrialio-backend.c
> +++ b/drivers/iio/industrialio-backend.c
> @@ -833,6 +833,23 @@ int iio_backend_sync_status_get(struct iio_backend *back,
> bool *sync_en)
> }
> EXPORT_SYMBOL_NS_GPL(iio_backend_sync_status_get, "IIO_BACKEND");
>
> +/**
> + * iio_backend_num_lanes_set - Number of lanes enabled.
> + * @back: Backend device
> + * @num_lanes: Number of lanes.
> + *
> + * RETURNS:
> + * 0 on success, negative error number on failure.
> + */
> +int iio_backend_num_lanes_set(struct iio_backend *back, unsigned int
> num_lanes)
> +{
> + if (!num_lanes)
> + return -EINVAL;
> +
> + return iio_backend_op_call(back, num_lanes_set, num_lanes);
> +}
> +EXPORT_SYMBOL_NS_GPL(iio_backend_num_lanes_set, "IIO_BACKEND");
> +
> /**
> * iio_backend_ddr_enable - Enable interface DDR (Double Data Rate) mode
> * @back: Backend device
> diff --git a/include/linux/iio/backend.h b/include/linux/iio/backend.h
> index e93d1a98e066..c8bcfe96c542 100644
> --- a/include/linux/iio/backend.h
> +++ b/include/linux/iio/backend.h
> @@ -112,6 +112,7 @@ enum iio_backend_filter_type {
> * @data_alignment_enable: Enable sync process.
> * @data_alignment_disable: Disable sync process.
> * @sync_status_get: Get the syncronization status (enabled/disabled).
> + * @num_lanes_set: Set the number of lanes enabled.
> * @ddr_enable: Enable interface DDR (Double Data Rate) mode.
> * @ddr_disable: Disable interface DDR (Double Data Rate) mode.
> * @data_stream_enable: Enable data stream.
> @@ -167,6 +168,7 @@ struct iio_backend_ops {
> int (*data_alignment_enable)(struct iio_backend *back);
> int (*data_alignment_disable)(struct iio_backend *back);
> int (*sync_status_get)(struct iio_backend *back, bool *sync_en);
> + int (*num_lanes_set)(struct iio_backend *back, unsigned int
> num_lanes);
> int (*ddr_enable)(struct iio_backend *back);
> int (*ddr_disable)(struct iio_backend *back);
> int (*data_stream_enable)(struct iio_backend *back);
> @@ -212,6 +214,7 @@ int iio_backend_filter_type_set(struct iio_backend *back,
> int iio_backend_data_alignment_enable(struct iio_backend *back);
> int iio_backend_data_alignment_disable(struct iio_backend *back);
> int iio_backend_sync_status_get(struct iio_backend *back, bool *sync_en);
> +int iio_backend_num_lanes_set(struct iio_backend *back, unsigned int
> num_lanes);
> int iio_backend_ddr_enable(struct iio_backend *back);
> int iio_backend_ddr_disable(struct iio_backend *back);
> int iio_backend_data_stream_enable(struct iio_backend *back);