linux-kernel - Re: [PATCH v3 04/11] iio: backend: add support for number of lanes

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Message-ID: <dc2a7cd3bff229dc70255ed1d2def98739754a4c.camel@gmail.com>
Date: Tue, 29 Apr 2025 09:19:04 +0100
From: Nuno Sá <noname.nuno@...il.com>
To: Antoniu Miclaus <antoniu.miclaus@...log.com>, jic23@...nel.org, 
	robh@...nel.org, conor+dt@...nel.org, linux-iio@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 04/11] iio: backend: add support for number of lanes

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@...log.com>
> ---

Reviewed-by: Nuno Sá <nuno.sa@...log.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);