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

Antoniu Miclaus
2024-11-29T15:36:20Z

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