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

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Message-ID: <20250425112538.59792-5-antoniu.miclaus@analog.com>
Date: Fri, 25 Apr 2025 14:25:31 +0300
From: Antoniu Miclaus <antoniu.miclaus@...log.com>
To: <jic23@...nel.org>, <robh@...nel.org>, <conor+dt@...nel.org>,
        <linux-iio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC: Antoniu Miclaus <antoniu.miclaus@...log.com>
Subject: [PATCH v3 04/11] iio: backend: add support for number of lanes

Add iio backend support for number of lanes to be enabled.

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@...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);
-- 
2.49.0