[PATCH v7 3/8] iio: backend: add API for oversampling

[Antoniu Miclaus <antoniu.miclaus@analog.com>]

Add backend support for enabling/disabling oversampling.

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
---
changes in v7:
 - implement 2 callbacks
	iio_backend_oversampling_enable()
	iio_backend_oversampling_disable()
 drivers/iio/industrialio-backend.c | 26 ++++++++++++++++++++++++++
 include/linux/iio/backend.h        |  6 ++++++
 2 files changed, 32 insertions(+)

diff --git a/drivers/iio/industrialio-backend.c b/drivers/iio/industrialio-backend.c
index ea184fc2c838..86237c1e7ab4 100644
--- a/drivers/iio/industrialio-backend.c
+++ b/drivers/iio/industrialio-backend.c
@@ -681,6 +681,32 @@ int iio_backend_data_size_set(struct iio_backend *back, unsigned int size)
 }
 EXPORT_SYMBOL_NS_GPL(iio_backend_data_size_set, IIO_BACKEND);
 
+/**
+ * iio_backend_oversampling_enable - oversampling enable
+ * @back: Backend device
+ *
+ * Return:
+ * 0 on success, negative error number on failure.
+ */
+int iio_backend_oversampling_enable(struct iio_backend *back)
+{
+	return iio_backend_op_call(back, oversampling_enable);
+}
+EXPORT_SYMBOL_NS_GPL(iio_backend_oversampling_enable, IIO_BACKEND);
+
+/**
+ * iio_backend_oversampling_disable - oversampling disable
+ * @back: Backend device
+ *
+ * Return:
+ * 0 on success, negative error number on failure.
+ */
+int iio_backend_oversampling_disable(struct iio_backend *back)
+{
+	return iio_backend_op_call(back, oversampling_disable);
+}
+EXPORT_SYMBOL_NS_GPL(iio_backend_oversampling_disable, IIO_BACKEND);
+
 /**
  * iio_backend_extend_chan_spec - Extend an IIO channel
  * @back: Backend device
diff --git a/include/linux/iio/backend.h b/include/linux/iio/backend.h
index 59b6651b7eaf..789fa9b586ec 100644
--- a/include/linux/iio/backend.h
+++ b/include/linux/iio/backend.h
@@ -94,6 +94,8 @@ enum iio_backend_interface_type {
  * @ext_info_get: Extended info getter.
  * @interface_type_get: Interface type.
  * @data_size_set: Data size.
+ * @oversampling_enable: Oversampling enable.
+ * @oversampling_disable: Oversampling disable.
  * @read_raw: Read a channel attribute from a backend device
  * @debugfs_print_chan_status: Print channel status into a buffer.
  * @debugfs_reg_access: Read or write register value of backend.
@@ -132,6 +134,8 @@ struct iio_backend_ops {
 	int (*interface_type_get)(struct iio_backend *back,
 				  enum iio_backend_interface_type *type);
 	int (*data_size_set)(struct iio_backend *back, unsigned int size);
+	int (*oversampling_enable)(struct iio_backend *back);
+	int (*oversampling_disable)(struct iio_backend *back);
 	int (*read_raw)(struct iio_backend *back,
 			struct iio_chan_spec const *chan, int *val, int *val2,
 			long mask);
@@ -183,6 +187,8 @@ ssize_t iio_backend_ext_info_get(struct iio_dev *indio_dev, uintptr_t private,
 int iio_backend_interface_type_get(struct iio_backend *back,
 				   enum iio_backend_interface_type *type);
 int iio_backend_data_size_set(struct iio_backend *back, unsigned int size);
+int iio_backend_oversampling_enable(struct iio_backend *back);
+int iio_backend_oversampling_disable(struct iio_backend *back);
 int iio_backend_read_raw(struct iio_backend *back,
 			 struct iio_chan_spec const *chan, int *val, int *val2,
 			 long mask);
-- 
2.47.1