linux-kernel - [PATCH 05/14] iio: backend: add support for number of lanes

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Message-ID: <20250220135429.8615-6-antoniu.miclaus@analog.com>
Date: Thu, 20 Feb 2025 15:54:15 +0200
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 05/14] 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>
---
 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 99c46b79e373..64ac3c6d9eb4 100644
--- a/drivers/iio/industrialio-backend.c
+++ b/drivers/iio/industrialio-backend.c
@@ -874,6 +874,23 @@ 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 38322e808ee2..67e062cabbea 100644
--- a/include/linux/iio/backend.h
+++ b/include/linux/iio/backend.h
@@ -107,6 +107,7 @@ enum iio_backend_interface_type {
  * @self_sync_enable: Enable the self sync data capture.
  * @self_sync_disable: Disable the self sync data capture.
  * @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.
@@ -164,6 +165,7 @@ struct iio_backend_ops {
 	int (*self_sync_enable)(struct iio_backend *back);
 	int (*self_sync_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);
@@ -211,6 +213,7 @@ int iio_backend_bitslip_disable(struct iio_backend *back);
 int iio_backend_self_sync_enable(struct iio_backend *back);
 int iio_backend_self_sync_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);
-- 
2.48.1