iio: backend: add support for number of lanes

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

Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
Link: https://patch.msgid.link/20250516082630.8236-4-antoniu.miclaus@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/industrialio-backend.c b/drivers/iio/industrialio-backend.c
index 1fd71b52069198d68755c7d1f8bf01e1797d9398..6b2d3dac52b303bdd2fc1645446690f9ba714e48 100644 (file)
--- a/drivers/iio/industrialio-backend.c
+++ b/drivers/iio/industrialio-backend.c
@@ -849,6 +849,23 @@ int iio_backend_interface_data_align(struct iio_backend *back, u32 timeout_us)
 }
 EXPORT_SYMBOL_NS_GPL(iio_backend_interface_data_align, "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 c579eb5234665cec0d3a8a0da974a15c85316f00..1f528fbd9d112cfc101286d2a7d694e35c1467ff 100644 (file)
--- a/include/linux/iio/backend.h
+++ b/include/linux/iio/backend.h
@@ -111,6 +111,7 @@ enum iio_backend_filter_type {
  * @debugfs_reg_access: Read or write register value of backend.
  * @filter_type_set: Set filter type.
  * @interface_data_align: Perform the data alignment process.
+ * @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.
@@ -166,6 +167,7 @@ struct iio_backend_ops {
        int (*filter_type_set)(struct iio_backend *back,
                               enum iio_backend_filter_type type);
        int (*interface_data_align)(struct iio_backend *back, u32 timeout_us);
+       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 devm_iio_backend_request_buffer(struct device *dev,
 int iio_backend_filter_type_set(struct iio_backend *back,
                                enum iio_backend_filter_type type);
 int iio_backend_interface_data_align(struct iio_backend *back, u32 timeout_us);
+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);